Commit 817fb263b5
Changed files (7)
src/arch/x86_64/bits.zig
@@ -1,9 +1,9 @@
const std = @import("std");
-const testing = std.testing;
-const mem = std.mem;
const assert = std.debug.assert;
-const ArrayList = std.ArrayList;
+const expect = std.testing.expect;
+
const Allocator = std.mem.Allocator;
+const ArrayList = std.ArrayList;
const DW = std.dwarf;
/// EFLAGS condition codes
@@ -135,960 +135,357 @@ pub const Condition = enum(u5) {
}
};
-/// Definitions of all of the general purpose x64 registers. The order is semantically meaningful.
-/// The registers are defined such that IDs go in descending order of 64-bit,
-/// 32-bit, 16-bit, and then 8-bit, and each set contains exactly sixteen
-/// registers. This results in some useful properties:
-///
-/// Any 64-bit register can be turned into its 32-bit form by adding 16, and
-/// vice versa. This also works between 32-bit and 16-bit forms. With 8-bit, it
-/// works for all except for sp, bp, si, and di, which do *not* have an 8-bit
-/// form.
-///
-/// If (register & 8) is set, the register is extended.
-///
-/// The ID can be easily determined by figuring out what range the register is
-/// in, and then subtracting the base.
pub const Register = enum(u7) {
// zig fmt: off
- // 0 through 15, 64-bit registers. 8-15 are extended.
- // id is just the int value.
rax, rcx, rdx, rbx, rsp, rbp, rsi, rdi,
r8, r9, r10, r11, r12, r13, r14, r15,
- // 16 through 31, 32-bit registers. 24-31 are extended.
- // id is int value - 16.
eax, ecx, edx, ebx, esp, ebp, esi, edi,
r8d, r9d, r10d, r11d, r12d, r13d, r14d, r15d,
- // 32-47, 16-bit registers. 40-47 are extended.
- // id is int value - 32.
ax, cx, dx, bx, sp, bp, si, di,
r8w, r9w, r10w, r11w, r12w, r13w, r14w, r15w,
- // 48-63, 8-bit registers. 56-63 are extended.
- // id is int value - 48.
- al, cl, dl, bl, ah, ch, dh, bh,
+ al, cl, dl, bl, spl, bpl, sil, dil,
r8b, r9b, r10b, r11b, r12b, r13b, r14b, r15b,
- // 64-79, 256-bit registers.
- // id is int value - 64.
+ ah, ch, dh, bh,
+
ymm0, ymm1, ymm2, ymm3, ymm4, ymm5, ymm6, ymm7,
ymm8, ymm9, ymm10, ymm11, ymm12, ymm13, ymm14, ymm15,
- // 80-95, 128-bit registers.
- // id is int value - 80.
xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7,
xmm8, xmm9, xmm10, xmm11, xmm12, xmm13, xmm14, xmm15,
- // Pseudo-value for MIR instructions.
+ es, cs, ss, ds, fs, gs,
+
none,
// zig fmt: on
- pub fn id(self: Register) u7 {
- return switch (@enumToInt(self)) {
- 0...63 => @as(u7, @truncate(u4, @enumToInt(self))),
- 64...79 => @enumToInt(self),
- else => unreachable,
- };
- }
-
- /// Returns the bit-width of the register.
- pub fn size(self: Register) u9 {
- return switch (@enumToInt(self)) {
- 0...15 => 64,
- 16...31 => 32,
- 32...47 => 16,
- 48...63 => 8,
- 64...79 => 256,
- 80...95 => 128,
- else => unreachable,
- };
- }
-
- /// Returns whether the register is *extended*. Extended registers are the
- /// new registers added with amd64, r8 through r15. This also includes any
- /// other variant of access to those registers, such as r8b, r15d, and so
- /// on. This is needed because access to these registers requires special
- /// handling via the REX prefix, via the B or R bits, depending on context.
- pub fn isExtended(self: Register) bool {
- return @enumToInt(self) & 0x08 != 0;
- }
-
- /// This returns the 4-bit register ID, which is used in practically every
- /// opcode. Note that bit 3 (the highest bit) is *never* used directly in
- /// an instruction (@see isExtended), and requires special handling. The
- /// lower three bits are often embedded directly in instructions (such as
- /// the B8 variant of moves), or used in R/M bytes.
- pub fn enc(self: Register) u4 {
- return @truncate(u4, @enumToInt(self));
- }
-
- /// Like enc, but only returns the lower 3 bits.
- pub fn lowEnc(self: Register) u3 {
- return @truncate(u3, @enumToInt(self));
- }
-
- pub fn to256(self: Register) Register {
- return @intToEnum(Register, @as(u8, self.enc()) + 64);
- }
+ pub const Class = enum(u2) {
+ general_purpose,
+ floating_point,
+ segment,
+ };
- pub fn to128(self: Register) Register {
- return @intToEnum(Register, @as(u8, self.enc()) + 80);
- }
+ pub fn class(reg: Register) Class {
+ return switch (@enumToInt(reg)) {
+ // zig fmt: off
+ @enumToInt(Register.rax) ... @enumToInt(Register.r15) => .general_purpose,
+ @enumToInt(Register.eax) ... @enumToInt(Register.r15d) => .general_purpose,
+ @enumToInt(Register.ax) ... @enumToInt(Register.r15w) => .general_purpose,
+ @enumToInt(Register.al) ... @enumToInt(Register.r15b) => .general_purpose,
+ @enumToInt(Register.ah) ... @enumToInt(Register.bh) => .general_purpose,
- /// Convert from any register to its 64 bit alias.
- pub fn to64(self: Register) Register {
- return @intToEnum(Register, self.enc());
- }
+ @enumToInt(Register.ymm0) ... @enumToInt(Register.ymm15) => .floating_point,
+ @enumToInt(Register.xmm0) ... @enumToInt(Register.xmm15) => .floating_point,
- /// Convert from any register to its 32 bit alias.
- pub fn to32(self: Register) Register {
- return @intToEnum(Register, @as(u8, self.enc()) + 16);
- }
-
- /// Convert from any register to its 16 bit alias.
- pub fn to16(self: Register) Register {
- return @intToEnum(Register, @as(u8, self.enc()) + 32);
- }
+ @enumToInt(Register.es) ... @enumToInt(Register.gs) => .segment,
- /// Convert from any register to its 8 bit alias.
- pub fn to8(self: Register) Register {
- return @intToEnum(Register, @as(u8, self.enc()) + 48);
+ else => unreachable,
+ // zig fmt: on
+ };
}
- pub fn dwarfLocOp(self: Register) u8 {
- switch (@enumToInt(self)) {
- 0...63 => return switch (self.to64()) {
- .rax => DW.OP.reg0,
- .rdx => DW.OP.reg1,
- .rcx => DW.OP.reg2,
- .rbx => DW.OP.reg3,
- .rsi => DW.OP.reg4,
- .rdi => DW.OP.reg5,
- .rbp => DW.OP.reg6,
- .rsp => DW.OP.reg7,
-
- .r8 => DW.OP.reg8,
- .r9 => DW.OP.reg9,
- .r10 => DW.OP.reg10,
- .r11 => DW.OP.reg11,
- .r12 => DW.OP.reg12,
- .r13 => DW.OP.reg13,
- .r14 => DW.OP.reg14,
- .r15 => DW.OP.reg15,
+ pub fn id(reg: Register) u6 {
+ const base = switch (@enumToInt(reg)) {
+ // zig fmt: off
+ @enumToInt(Register.rax) ... @enumToInt(Register.r15) => @enumToInt(Register.rax),
+ @enumToInt(Register.eax) ... @enumToInt(Register.r15d) => @enumToInt(Register.eax),
+ @enumToInt(Register.ax) ... @enumToInt(Register.r15w) => @enumToInt(Register.ax),
+ @enumToInt(Register.al) ... @enumToInt(Register.r15b) => @enumToInt(Register.al),
+ @enumToInt(Register.ah) ... @enumToInt(Register.bh) => @enumToInt(Register.ah) - 4,
- else => unreachable,
- },
+ @enumToInt(Register.ymm0) ... @enumToInt(Register.ymm15) => @enumToInt(Register.ymm0) - 16,
+ @enumToInt(Register.xmm0) ... @enumToInt(Register.xmm15) => @enumToInt(Register.xmm0) - 16,
- 64...79 => return @as(u8, self.enc()) + DW.OP.reg17,
+ @enumToInt(Register.es) ... @enumToInt(Register.gs) => @enumToInt(Register.es) - 32,
else => unreachable,
- }
+ // zig fmt: on
+ };
+ return @intCast(u6, @enumToInt(reg) - base);
}
- /// DWARF encodings that push a value onto the DWARF stack that is either
- /// the contents of a register or the result of adding the contents a given
- /// register to a given signed offset.
- pub fn dwarfLocOpDeref(self: Register) u8 {
- switch (@enumToInt(self)) {
- 0...63 => return switch (self.to64()) {
- .rax => DW.OP.breg0,
- .rdx => DW.OP.breg1,
- .rcx => DW.OP.breg2,
- .rbx => DW.OP.breg3,
- .rsi => DW.OP.breg4,
- .rdi => DW.OP.breg5,
- .rbp => DW.OP.breg6,
- .rsp => DW.OP.fbreg,
-
- .r8 => DW.OP.breg8,
- .r9 => DW.OP.breg9,
- .r10 => DW.OP.breg10,
- .r11 => DW.OP.breg11,
- .r12 => DW.OP.breg12,
- .r13 => DW.OP.breg13,
- .r14 => DW.OP.breg14,
- .r15 => DW.OP.breg15,
+ pub fn size(reg: Register) u32 {
+ return switch (@enumToInt(reg)) {
+ // zig fmt: off
+ @enumToInt(Register.rax) ... @enumToInt(Register.r15) => 64,
+ @enumToInt(Register.eax) ... @enumToInt(Register.r15d) => 32,
+ @enumToInt(Register.ax) ... @enumToInt(Register.r15w) => 16,
+ @enumToInt(Register.al) ... @enumToInt(Register.r15b) => 8,
+ @enumToInt(Register.ah) ... @enumToInt(Register.bh) => 8,
- else => unreachable,
- },
+ @enumToInt(Register.ymm0) ... @enumToInt(Register.ymm15) => 256,
+ @enumToInt(Register.xmm0) ... @enumToInt(Register.xmm15) => 128,
- 64...79 => return @as(u8, self.enc()) + DW.OP.breg17,
+ @enumToInt(Register.es) ... @enumToInt(Register.gs) => 16,
else => unreachable,
- }
- }
-};
-
-// zig fmt: on
-
-/// Encoding helper functions for x86_64 instructions
-///
-/// Many of these helpers do very little, but they can help make things
-/// slightly more readable with more descriptive field names / function names.
-///
-/// Some of them also have asserts to ensure that we aren't doing dumb things.
-/// For example, trying to use register 4 (esp) in an indirect modr/m byte is illegal,
-/// you need to encode it with an SIB byte.
-///
-/// Note that ALL of these helper functions will assume capacity,
-/// so ensure that the `code` has sufficient capacity before using them.
-/// The `init` method is the recommended way to ensure capacity.
-pub const Encoder = struct {
- /// Non-owning reference to the code array
- code: *ArrayList(u8),
-
- const Self = @This();
-
- /// Wrap `code` in Encoder to make it easier to call these helper functions
- ///
- /// maximum_inst_size should contain the maximum number of bytes
- /// that the encoded instruction will take.
- /// This is because the helper functions will assume capacity
- /// in order to avoid bounds checking.
- pub fn init(code: *ArrayList(u8), maximum_inst_size: u8) !Self {
- try code.ensureUnusedCapacity(maximum_inst_size);
- return Self{ .code = code };
- }
-
- /// Directly write a number to the code array with big endianness
- pub fn writeIntBig(self: Self, comptime T: type, value: T) void {
- mem.writeIntBig(
- T,
- self.code.addManyAsArrayAssumeCapacity(@divExact(@typeInfo(T).Int.bits, 8)),
- value,
- );
+ // zig fmt: on
+ };
}
- /// Directly write a number to the code array with little endianness
- pub fn writeIntLittle(self: Self, comptime T: type, value: T) void {
- mem.writeIntLittle(
- T,
- self.code.addManyAsArrayAssumeCapacity(@divExact(@typeInfo(T).Int.bits, 8)),
- value,
- );
- }
+ pub fn isExtended(reg: Register) bool {
+ return switch (@enumToInt(reg)) {
+ // zig fmt: off
+ @enumToInt(Register.r8) ... @enumToInt(Register.r15) => true,
+ @enumToInt(Register.r8d) ... @enumToInt(Register.r15d) => true,
+ @enumToInt(Register.r8w) ... @enumToInt(Register.r15w) => true,
+ @enumToInt(Register.r8b) ... @enumToInt(Register.r15b) => true,
- // --------
- // Prefixes
- // --------
-
- pub const LegacyPrefixes = packed struct {
- /// LOCK
- prefix_f0: bool = false,
- /// REPNZ, REPNE, REP, Scalar Double-precision
- prefix_f2: bool = false,
- /// REPZ, REPE, REP, Scalar Single-precision
- prefix_f3: bool = false,
-
- /// CS segment override or Branch not taken
- prefix_2e: bool = false,
- /// DS segment override
- prefix_36: bool = false,
- /// ES segment override
- prefix_26: bool = false,
- /// FS segment override
- prefix_64: bool = false,
- /// GS segment override
- prefix_65: bool = false,
-
- /// Branch taken
- prefix_3e: bool = false,
-
- /// Operand size override (enables 16 bit operation)
- prefix_66: bool = false,
-
- /// Address size override (enables 16 bit address size)
- prefix_67: bool = false,
-
- padding: u5 = 0,
- };
+ @enumToInt(Register.ymm8) ... @enumToInt(Register.ymm15) => true,
+ @enumToInt(Register.xmm8) ... @enumToInt(Register.xmm15) => true,
- /// Encodes legacy prefixes
- pub fn legacyPrefixes(self: Self, prefixes: LegacyPrefixes) void {
- if (@bitCast(u16, prefixes) != 0) {
- // Hopefully this path isn't taken very often, so we'll do it the slow way for now
-
- // LOCK
- if (prefixes.prefix_f0) self.code.appendAssumeCapacity(0xf0);
- // REPNZ, REPNE, REP, Scalar Double-precision
- if (prefixes.prefix_f2) self.code.appendAssumeCapacity(0xf2);
- // REPZ, REPE, REP, Scalar Single-precision
- if (prefixes.prefix_f3) self.code.appendAssumeCapacity(0xf3);
-
- // CS segment override or Branch not taken
- if (prefixes.prefix_2e) self.code.appendAssumeCapacity(0x2e);
- // DS segment override
- if (prefixes.prefix_36) self.code.appendAssumeCapacity(0x36);
- // ES segment override
- if (prefixes.prefix_26) self.code.appendAssumeCapacity(0x26);
- // FS segment override
- if (prefixes.prefix_64) self.code.appendAssumeCapacity(0x64);
- // GS segment override
- if (prefixes.prefix_65) self.code.appendAssumeCapacity(0x65);
-
- // Branch taken
- if (prefixes.prefix_3e) self.code.appendAssumeCapacity(0x3e);
-
- // Operand size override
- if (prefixes.prefix_66) self.code.appendAssumeCapacity(0x66);
-
- // Address size override
- if (prefixes.prefix_67) self.code.appendAssumeCapacity(0x67);
- }
+ else => false,
+ // zig fmt: on
+ };
}
- /// Use 16 bit operand size
- ///
- /// Note that this flag is overridden by REX.W, if both are present.
- pub fn prefix16BitMode(self: Self) void {
- self.code.appendAssumeCapacity(0x66);
+ pub fn isRexInvalid(reg: Register) bool {
+ return switch (@enumToInt(reg)) {
+ @enumToInt(Register.ah)...@enumToInt(Register.bh) => true,
+ else => false,
+ };
}
- pub const Vex = struct {
- rex_prefix: Rex = .{},
- lead_opc: u5 = 0b0_0001,
- register: u4 = 0b1111,
- length: u1 = 0b0,
- simd_prefix: u2 = 0b00,
- wig_desc: bool = false,
- lig_desc: bool = false,
- lz_desc: bool = false,
-
- pub fn rex(self: *Vex, r: Rex) void {
- self.rex_prefix = r;
- }
-
- pub fn lead_opc_0f(self: *Vex) void {
- self.lead_opc = 0b0_0001;
- }
-
- pub fn lead_opc_0f_38(self: *Vex) void {
- self.lead_opc = 0b0_0010;
- }
-
- pub fn lead_opc_0f_3a(self: *Vex) void {
- self.lead_opc = 0b0_0011;
- }
-
- pub fn reg(self: *Vex, register: u4) void {
- self.register = ~register;
- }
-
- pub fn len_128(self: *Vex) void {
- self.length = 0;
- }
-
- pub fn len_256(self: *Vex) void {
- assert(!self.lz_desc);
- self.length = 1;
- }
-
- pub fn simd_prefix_66(self: *Vex) void {
- self.simd_prefix = 0b01;
- }
-
- pub fn simd_prefix_f3(self: *Vex) void {
- self.simd_prefix = 0b10;
- }
-
- pub fn simd_prefix_f2(self: *Vex) void {
- self.simd_prefix = 0b11;
- }
-
- pub fn wig(self: *Vex) void {
- self.wig_desc = true;
- }
-
- pub fn lig(self: *Vex) void {
- self.lig_desc = true;
- }
-
- pub fn lz(self: *Vex) void {
- self.lz_desc = true;
- }
+ pub fn enc(reg: Register) u4 {
+ const base = switch (@enumToInt(reg)) {
+ // zig fmt: off
+ @enumToInt(Register.rax) ... @enumToInt(Register.r15) => @enumToInt(Register.rax),
+ @enumToInt(Register.eax) ... @enumToInt(Register.r15d) => @enumToInt(Register.eax),
+ @enumToInt(Register.ax) ... @enumToInt(Register.r15w) => @enumToInt(Register.ax),
+ @enumToInt(Register.al) ... @enumToInt(Register.r15b) => @enumToInt(Register.al),
+ @enumToInt(Register.ah) ... @enumToInt(Register.bh) => @enumToInt(Register.ah) - 4,
- pub fn write(self: Vex, writer: anytype) usize {
- var buf: [3]u8 = .{0} ** 3;
- const form_3byte: bool = blk: {
- if (self.rex_prefix.w and !self.wig_desc) break :blk true;
- if (self.rex_prefix.x or self.rex_prefix.b) break :blk true;
- break :blk self.lead_opc != 0b0_0001;
- };
+ @enumToInt(Register.ymm0) ... @enumToInt(Register.ymm15) => @enumToInt(Register.ymm0),
+ @enumToInt(Register.xmm0) ... @enumToInt(Register.xmm15) => @enumToInt(Register.xmm0),
- if (self.lz_desc) {
- assert(self.length == 0);
- }
-
- if (form_3byte) {
- // First byte
- buf[0] = 0xc4;
- // Second byte
- const rxb_mask: u3 = @intCast(u3, @boolToInt(!self.rex_prefix.r)) << 2 |
- @intCast(u2, @boolToInt(!self.rex_prefix.x)) << 1 |
- @boolToInt(!self.rex_prefix.b);
- buf[1] |= @intCast(u8, rxb_mask) << 5;
- buf[1] |= self.lead_opc;
- // Third byte
- buf[2] |= @intCast(u8, @boolToInt(!self.rex_prefix.w)) << 7;
- buf[2] |= @intCast(u7, self.register) << 3;
- buf[2] |= @intCast(u3, self.length) << 2;
- buf[2] |= self.simd_prefix;
- } else {
- // First byte
- buf[0] = 0xc5;
- // Second byte
- buf[1] |= @intCast(u8, @boolToInt(!self.rex_prefix.r)) << 7;
- buf[1] |= @intCast(u7, self.register) << 3;
- buf[1] |= @intCast(u3, self.length) << 2;
- buf[1] |= self.simd_prefix;
- }
-
- const count: usize = if (form_3byte) 3 else 2;
- _ = writer.writeAll(buf[0..count]) catch unreachable;
- return count;
- }
- };
+ @enumToInt(Register.es) ... @enumToInt(Register.gs) => @enumToInt(Register.es),
- pub fn vex(self: Self, prefix: Vex) void {
- _ = prefix.write(self.code.writer());
+ else => unreachable,
+ // zig fmt: on
+ };
+ return @truncate(u4, @enumToInt(reg) - base);
}
- /// From section 2.2.1.2 of the manual, REX is encoded as b0100WRXB
- pub const Rex = struct {
- /// Wide, enables 64-bit operation
- w: bool = false,
- /// Extends the reg field in the ModR/M byte
- r: bool = false,
- /// Extends the index field in the SIB byte
- x: bool = false,
- /// Extends the r/m field in the ModR/M byte,
- /// or the base field in the SIB byte,
- /// or the reg field in the Opcode byte
- b: bool = false,
- };
-
- /// Encodes a REX prefix byte given all the fields
- ///
- /// Use this byte whenever you need 64 bit operation,
- /// or one of reg, index, r/m, base, or opcode-reg might be extended.
- ///
- /// See struct `Rex` for a description of each field.
- ///
- /// Does not add a prefix byte if none of the fields are set!
- pub fn rex(self: Self, byte: Rex) void {
- var value: u8 = 0b0100_0000;
-
- if (byte.w) value |= 0b1000;
- if (byte.r) value |= 0b0100;
- if (byte.x) value |= 0b0010;
- if (byte.b) value |= 0b0001;
-
- if (value != 0b0100_0000) {
- self.code.appendAssumeCapacity(value);
- }
+ pub fn lowEnc(reg: Register) u3 {
+ return @truncate(u3, reg.enc());
}
- // ------
- // Opcode
- // ------
-
- /// Encodes a 1 byte opcode
- pub fn opcode_1byte(self: Self, opcode: u8) void {
- self.code.appendAssumeCapacity(opcode);
+ pub fn toSize(reg: Register, bit_size: u32) Register {
+ return switch (bit_size) {
+ 8 => reg.to8(),
+ 16 => reg.to16(),
+ 32 => reg.to32(),
+ 64 => reg.to64(),
+ 128 => reg.to128(),
+ 256 => reg.to256(),
+ else => unreachable,
+ };
}
- /// Encodes a 2 byte opcode
- ///
- /// e.g. IMUL has the opcode 0x0f 0xaf, so you use
- ///
- /// encoder.opcode_2byte(0x0f, 0xaf);
- pub fn opcode_2byte(self: Self, prefix: u8, opcode: u8) void {
- self.code.appendAssumeCapacity(prefix);
- self.code.appendAssumeCapacity(opcode);
+ fn gpBase(reg: Register) u7 {
+ assert(reg.class() == .general_purpose);
+ return switch (@enumToInt(reg)) {
+ // zig fmt: off
+ @enumToInt(Register.rax) ... @enumToInt(Register.r15) => @enumToInt(Register.rax),
+ @enumToInt(Register.eax) ... @enumToInt(Register.r15d) => @enumToInt(Register.eax),
+ @enumToInt(Register.ax) ... @enumToInt(Register.r15w) => @enumToInt(Register.ax),
+ @enumToInt(Register.al) ... @enumToInt(Register.r15b) => @enumToInt(Register.al),
+ @enumToInt(Register.ah) ... @enumToInt(Register.bh) => @enumToInt(Register.ah) - 4,
+ else => unreachable,
+ // zig fmt: on
+ };
}
- /// Encodes a 3 byte opcode
- ///
- /// e.g. MOVSD has the opcode 0xf2 0x0f 0x10
- ///
- /// encoder.opcode_3byte(0xf2, 0x0f, 0x10);
- pub fn opcode_3byte(self: Self, prefix_1: u8, prefix_2: u8, opcode: u8) void {
- self.code.appendAssumeCapacity(prefix_1);
- self.code.appendAssumeCapacity(prefix_2);
- self.code.appendAssumeCapacity(opcode);
+ pub fn to64(reg: Register) Register {
+ return @intToEnum(Register, @enumToInt(reg) - reg.gpBase() + @enumToInt(Register.rax));
}
- /// Encodes a 1 byte opcode with a reg field
- ///
- /// Remember to add a REX prefix byte if reg is extended!
- pub fn opcode_withReg(self: Self, opcode: u8, reg: u3) void {
- assert(opcode & 0b111 == 0);
- self.code.appendAssumeCapacity(opcode | reg);
+ pub fn to32(reg: Register) Register {
+ return @intToEnum(Register, @enumToInt(reg) - reg.gpBase() + @enumToInt(Register.eax));
}
- // ------
- // ModR/M
- // ------
-
- /// Construct a ModR/M byte given all the fields
- ///
- /// Remember to add a REX prefix byte if reg or rm are extended!
- pub fn modRm(self: Self, mod: u2, reg_or_opx: u3, rm: u3) void {
- self.code.appendAssumeCapacity(
- @as(u8, mod) << 6 | @as(u8, reg_or_opx) << 3 | rm,
- );
+ pub fn to16(reg: Register) Register {
+ return @intToEnum(Register, @enumToInt(reg) - reg.gpBase() + @enumToInt(Register.ax));
}
- /// Construct a ModR/M byte using direct r/m addressing
- /// r/m effective address: r/m
- ///
- /// Note reg's effective address is always just reg for the ModR/M byte.
- /// Remember to add a REX prefix byte if reg or rm are extended!
- pub fn modRm_direct(self: Self, reg_or_opx: u3, rm: u3) void {
- self.modRm(0b11, reg_or_opx, rm);
+ pub fn to8(reg: Register) Register {
+ return @intToEnum(Register, @enumToInt(reg) - reg.gpBase() + @enumToInt(Register.al));
}
- /// Construct a ModR/M byte using indirect r/m addressing
- /// r/m effective address: [r/m]
- ///
- /// Note reg's effective address is always just reg for the ModR/M byte.
- /// Remember to add a REX prefix byte if reg or rm are extended!
- pub fn modRm_indirectDisp0(self: Self, reg_or_opx: u3, rm: u3) void {
- assert(rm != 4 and rm != 5);
- self.modRm(0b00, reg_or_opx, rm);
+ fn fpBase(reg: Register) u7 {
+ assert(reg.class() == .floating_point);
+ return switch (@enumToInt(reg)) {
+ @enumToInt(Register.ymm0)...@enumToInt(Register.ymm15) => @enumToInt(Register.ymm0),
+ @enumToInt(Register.xmm0)...@enumToInt(Register.xmm15) => @enumToInt(Register.xmm0),
+ else => unreachable,
+ };
}
- /// Construct a ModR/M byte using indirect SIB addressing
- /// r/m effective address: [SIB]
- ///
- /// Note reg's effective address is always just reg for the ModR/M byte.
- /// Remember to add a REX prefix byte if reg or rm are extended!
- pub fn modRm_SIBDisp0(self: Self, reg_or_opx: u3) void {
- self.modRm(0b00, reg_or_opx, 0b100);
+ pub fn to256(reg: Register) Register {
+ return @intToEnum(Register, @enumToInt(reg) - reg.fpBase() + @enumToInt(Register.ymm0));
}
- /// Construct a ModR/M byte using RIP-relative addressing
- /// r/m effective address: [RIP + disp32]
- ///
- /// Note reg's effective address is always just reg for the ModR/M byte.
- /// Remember to add a REX prefix byte if reg or rm are extended!
- pub fn modRm_RIPDisp32(self: Self, reg_or_opx: u3) void {
- self.modRm(0b00, reg_or_opx, 0b101);
+ pub fn to128(reg: Register) Register {
+ return @intToEnum(Register, @enumToInt(reg) - reg.fpBase() + @enumToInt(Register.xmm0));
}
- /// Construct a ModR/M byte using indirect r/m with a 8bit displacement
- /// r/m effective address: [r/m + disp8]
- ///
- /// Note reg's effective address is always just reg for the ModR/M byte.
- /// Remember to add a REX prefix byte if reg or rm are extended!
- pub fn modRm_indirectDisp8(self: Self, reg_or_opx: u3, rm: u3) void {
- assert(rm != 4);
- self.modRm(0b01, reg_or_opx, rm);
+ pub fn dwarfLocOp(reg: Register) u8 {
+ return switch (reg.class()) {
+ .general_purpose => @intCast(u8, @enumToInt(reg) - reg.gpBase()) + DW.OP.reg0,
+ .floating_point => @intCast(u8, @enumToInt(reg) - reg.fpBase()) + DW.OP.reg17,
+ else => unreachable,
+ };
}
- /// Construct a ModR/M byte using indirect SIB with a 8bit displacement
- /// r/m effective address: [SIB + disp8]
- ///
- /// Note reg's effective address is always just reg for the ModR/M byte.
- /// Remember to add a REX prefix byte if reg or rm are extended!
- pub fn modRm_SIBDisp8(self: Self, reg_or_opx: u3) void {
- self.modRm(0b01, reg_or_opx, 0b100);
+ /// DWARF encodings that push a value onto the DWARF stack that is either
+ /// the contents of a register or the result of adding the contents a given
+ /// register to a given signed offset.
+ pub fn dwarfLocOpDeref(reg: Register) u8 {
+ return switch (reg.class()) {
+ .general_purpose => @intCast(u8, @enumToInt(reg) - reg.gpBase()) + DW.OP.breg0,
+ .floating_point => @intCast(u8, @enumToInt(reg) - reg.fpBase()) + DW.OP.breg17,
+ else => unreachable,
+ };
}
+};
- /// Construct a ModR/M byte using indirect r/m with a 32bit displacement
- /// r/m effective address: [r/m + disp32]
- ///
- /// Note reg's effective address is always just reg for the ModR/M byte.
- /// Remember to add a REX prefix byte if reg or rm are extended!
- pub fn modRm_indirectDisp32(self: Self, reg_or_opx: u3, rm: u3) void {
- assert(rm != 4);
- self.modRm(0b10, reg_or_opx, rm);
- }
+test "Register id - different classes" {
+ try expect(Register.al.id() == Register.ax.id());
+ try expect(Register.ah.id() == Register.spl.id());
+ try expect(Register.ax.id() == Register.eax.id());
+ try expect(Register.eax.id() == Register.rax.id());
- /// Construct a ModR/M byte using indirect SIB with a 32bit displacement
- /// r/m effective address: [SIB + disp32]
- ///
- /// Note reg's effective address is always just reg for the ModR/M byte.
- /// Remember to add a REX prefix byte if reg or rm are extended!
- pub fn modRm_SIBDisp32(self: Self, reg_or_opx: u3) void {
- self.modRm(0b10, reg_or_opx, 0b100);
- }
+ try expect(Register.ymm0.id() == 0b10000);
+ try expect(Register.ymm0.id() != Register.rax.id());
+ try expect(Register.xmm0.id() == Register.ymm0.id());
- // ---
- // SIB
- // ---
-
- /// Construct a SIB byte given all the fields
- ///
- /// Remember to add a REX prefix byte if index or base are extended!
- pub fn sib(self: Self, scale: u2, index: u3, base: u3) void {
- self.code.appendAssumeCapacity(
- @as(u8, scale) << 6 | @as(u8, index) << 3 | base,
- );
- }
+ try expect(Register.es.id() == 0b100000);
+}
- /// Construct a SIB byte with scale * index + base, no frills.
- /// r/m effective address: [base + scale * index]
- ///
- /// Remember to add a REX prefix byte if index or base are extended!
- pub fn sib_scaleIndexBase(self: Self, scale: u2, index: u3, base: u3) void {
- assert(base != 5);
+test "Register enc - different classes" {
+ try expect(Register.al.enc() == Register.ax.enc());
+ try expect(Register.ax.enc() == Register.eax.enc());
+ try expect(Register.eax.enc() == Register.rax.enc());
+ try expect(Register.ymm0.enc() == Register.rax.enc());
+ try expect(Register.xmm0.enc() == Register.ymm0.enc());
+ try expect(Register.es.enc() == Register.rax.enc());
+}
- self.sib(scale, index, base);
- }
+test "Register classes" {
+ try expect(Register.r11.class() == .general_purpose);
+ try expect(Register.ymm11.class() == .floating_point);
+ try expect(Register.fs.class() == .segment);
+}
- /// Construct a SIB byte with scale * index + disp32
- /// r/m effective address: [scale * index + disp32]
- ///
- /// Remember to add a REX prefix byte if index or base are extended!
- pub fn sib_scaleIndexDisp32(self: Self, scale: u2, index: u3) void {
- assert(index != 4);
-
- // scale is actually ignored
- // index = 4 means no index
- // base = 5 means no base, if mod == 0.
- self.sib(scale, index, 5);
- }
+pub const Memory = union(enum) {
+ sib: Sib,
+ rip: Rip,
+ moffs: Moffs,
- /// Construct a SIB byte with just base
- /// r/m effective address: [base]
- ///
- /// Remember to add a REX prefix byte if index or base are extended!
- pub fn sib_base(self: Self, base: u3) void {
- assert(base != 5);
+ pub const ScaleIndex = packed struct {
+ scale: u4,
+ index: Register,
+ };
- // scale is actually ignored
- // index = 4 means no index
- self.sib(0, 4, base);
- }
+ pub const PtrSize = enum {
+ byte,
+ word,
+ dword,
+ qword,
+ tbyte,
+
+ pub fn fromSize(bit_size: u32) PtrSize {
+ return switch (bit_size) {
+ 8 => .byte,
+ 16 => .word,
+ 32 => .dword,
+ 64 => .qword,
+ 80 => .tbyte,
+ else => unreachable,
+ };
+ }
- /// Construct a SIB byte with just disp32
- /// r/m effective address: [disp32]
- ///
- /// Remember to add a REX prefix byte if index or base are extended!
- pub fn sib_disp32(self: Self) void {
- // scale is actually ignored
- // index = 4 means no index
- // base = 5 means no base, if mod == 0.
- self.sib(0, 4, 5);
- }
+ pub fn size(s: PtrSize) u32 {
+ return switch (s) {
+ .byte => 8,
+ .word => 16,
+ .dword => 32,
+ .qword => 64,
+ .tbyte => 80,
+ };
+ }
+ };
- /// Construct a SIB byte with scale * index + base + disp8
- /// r/m effective address: [base + scale * index + disp8]
- ///
- /// Remember to add a REX prefix byte if index or base are extended!
- pub fn sib_scaleIndexBaseDisp8(self: Self, scale: u2, index: u3, base: u3) void {
- self.sib(scale, index, base);
- }
+ pub const Sib = struct {
+ ptr_size: PtrSize,
+ base: ?Register,
+ scale_index: ?ScaleIndex,
+ disp: i32,
+ };
- /// Construct a SIB byte with base + disp8, no index
- /// r/m effective address: [base + disp8]
- ///
- /// Remember to add a REX prefix byte if index or base are extended!
- pub fn sib_baseDisp8(self: Self, base: u3) void {
- // scale is ignored
- // index = 4 means no index
- self.sib(0, 4, base);
- }
+ pub const Rip = struct {
+ ptr_size: PtrSize,
+ disp: i32,
+ };
- /// Construct a SIB byte with scale * index + base + disp32
- /// r/m effective address: [base + scale * index + disp32]
- ///
- /// Remember to add a REX prefix byte if index or base are extended!
- pub fn sib_scaleIndexBaseDisp32(self: Self, scale: u2, index: u3, base: u3) void {
- self.sib(scale, index, base);
- }
+ pub const Moffs = struct {
+ seg: Register,
+ offset: u64,
+ };
- /// Construct a SIB byte with base + disp32, no index
- /// r/m effective address: [base + disp32]
- ///
- /// Remember to add a REX prefix byte if index or base are extended!
- pub fn sib_baseDisp32(self: Self, base: u3) void {
- // scale is ignored
- // index = 4 means no index
- self.sib(0, 4, base);
+ pub fn moffs(reg: Register, offset: u64) Memory {
+ assert(reg.class() == .segment);
+ return .{ .moffs = .{ .seg = reg, .offset = offset } };
}
- // -------------------------
- // Trivial (no bit fiddling)
- // -------------------------
-
- /// Encode an 8 bit immediate
- ///
- /// It is sign-extended to 64 bits by the cpu.
- pub fn imm8(self: Self, imm: i8) void {
- self.code.appendAssumeCapacity(@bitCast(u8, imm));
+ pub fn sib(ptr_size: PtrSize, args: struct {
+ disp: i32,
+ base: ?Register = null,
+ scale_index: ?ScaleIndex = null,
+ }) Memory {
+ return .{ .sib = .{
+ .base = args.base,
+ .disp = args.disp,
+ .ptr_size = ptr_size,
+ .scale_index = args.scale_index,
+ } };
}
- /// Encode an 8 bit displacement
- ///
- /// It is sign-extended to 64 bits by the cpu.
- pub fn disp8(self: Self, disp: i8) void {
- self.code.appendAssumeCapacity(@bitCast(u8, disp));
+ pub fn rip(ptr_size: PtrSize, disp: i32) Memory {
+ return .{ .rip = .{ .ptr_size = ptr_size, .disp = disp } };
}
- /// Encode an 16 bit immediate
- ///
- /// It is sign-extended to 64 bits by the cpu.
- pub fn imm16(self: Self, imm: i16) void {
- self.writeIntLittle(i16, imm);
+ pub fn isSegmentRegister(mem: Memory) bool {
+ return switch (mem) {
+ .moffs => true,
+ .rip => false,
+ .sib => |s| if (s.base) |r| r.class() == .segment else false,
+ };
}
- /// Encode an 32 bit immediate
- ///
- /// It is sign-extended to 64 bits by the cpu.
- pub fn imm32(self: Self, imm: i32) void {
- self.writeIntLittle(i32, imm);
+ pub fn base(mem: Memory) ?Register {
+ return switch (mem) {
+ .moffs => |m| m.seg,
+ .sib => |s| s.base,
+ .rip => null,
+ };
}
- /// Encode an 32 bit displacement
- ///
- /// It is sign-extended to 64 bits by the cpu.
- pub fn disp32(self: Self, disp: i32) void {
- self.writeIntLittle(i32, disp);
+ pub fn scaleIndex(mem: Memory) ?ScaleIndex {
+ return switch (mem) {
+ .moffs, .rip => null,
+ .sib => |s| s.scale_index,
+ };
}
- /// Encode an 64 bit immediate
- ///
- /// It is sign-extended to 64 bits by the cpu.
- pub fn imm64(self: Self, imm: u64) void {
- self.writeIntLittle(u64, imm);
+ pub fn size(mem: Memory) u32 {
+ return switch (mem) {
+ .rip => |r| r.ptr_size.size(),
+ .sib => |s| s.ptr_size.size(),
+ .moffs => unreachable,
+ };
}
};
-
-test "Encoder helpers - general purpose registers" {
- var code = ArrayList(u8).init(testing.allocator);
- defer code.deinit();
-
- // simple integer multiplication
-
- // imul eax,edi
- // 0faf c7
- {
- try code.resize(0);
- const encoder = try Encoder.init(&code, 4);
- encoder.rex(.{
- .r = Register.eax.isExtended(),
- .b = Register.edi.isExtended(),
- });
- encoder.opcode_2byte(0x0f, 0xaf);
- encoder.modRm_direct(
- Register.eax.lowEnc(),
- Register.edi.lowEnc(),
- );
-
- try testing.expectEqualSlices(u8, &[_]u8{ 0x0f, 0xaf, 0xc7 }, code.items);
- }
-
- // simple mov
-
- // mov eax,edi
- // 89 f8
- {
- try code.resize(0);
- const encoder = try Encoder.init(&code, 3);
- encoder.rex(.{
- .r = Register.edi.isExtended(),
- .b = Register.eax.isExtended(),
- });
- encoder.opcode_1byte(0x89);
- encoder.modRm_direct(
- Register.edi.lowEnc(),
- Register.eax.lowEnc(),
- );
-
- try testing.expectEqualSlices(u8, &[_]u8{ 0x89, 0xf8 }, code.items);
- }
-
- // signed integer addition of 32-bit sign extended immediate to 64 bit register
-
- // add rcx, 2147483647
- //
- // Using the following opcode: REX.W + 81 /0 id, we expect the following encoding
- //
- // 48 : REX.W set for 64 bit operand (*r*cx)
- // 81 : opcode for "<arithmetic> with immediate"
- // c1 : id = rcx,
- // : c1 = 11 <-- mod = 11 indicates r/m is register (rcx)
- // : 000 <-- opcode_extension = 0 because opcode extension is /0. /0 specifies ADD
- // : 001 <-- 001 is rcx
- // ffffff7f : 2147483647
- {
- try code.resize(0);
- const encoder = try Encoder.init(&code, 7);
- encoder.rex(.{ .w = true }); // use 64 bit operation
- encoder.opcode_1byte(0x81);
- encoder.modRm_direct(
- 0,
- Register.rcx.lowEnc(),
- );
- encoder.imm32(2147483647);
-
- try testing.expectEqualSlices(u8, &[_]u8{ 0x48, 0x81, 0xc1, 0xff, 0xff, 0xff, 0x7f }, code.items);
- }
-}
-
-test "Encoder helpers - Vex prefix" {
- var buf: [3]u8 = undefined;
- var stream = std.io.fixedBufferStream(&buf);
- const writer = stream.writer();
-
- {
- var vex_prefix = Encoder.Vex{};
- vex_prefix.rex(.{
- .r = true,
- });
- const nwritten = vex_prefix.write(writer);
- try testing.expectEqualSlices(u8, &[_]u8{ 0xc5, 0x78 }, buf[0..nwritten]);
- }
-
- {
- stream.reset();
- var vex_prefix = Encoder.Vex{};
- vex_prefix.reg(Register.xmm15.enc());
- const nwritten = vex_prefix.write(writer);
- try testing.expectEqualSlices(u8, &[_]u8{ 0xc5, 0x80 }, buf[0..nwritten]);
- }
-
- {
- stream.reset();
- var vex_prefix = Encoder.Vex{};
- vex_prefix.rex(.{
- .w = true,
- .x = true,
- });
- const nwritten = vex_prefix.write(writer);
- try testing.expectEqualSlices(u8, &[_]u8{ 0xc4, 0b101_0_0001, 0b0_1111_0_00 }, buf[0..nwritten]);
- }
-
- {
- stream.reset();
- var vex_prefix = Encoder.Vex{};
- vex_prefix.rex(.{
- .w = true,
- .r = true,
- });
- vex_prefix.len_256();
- vex_prefix.lead_opc_0f();
- vex_prefix.simd_prefix_66();
- const nwritten = vex_prefix.write(writer);
- try testing.expectEqualSlices(u8, &[_]u8{ 0xc4, 0b011_0_0001, 0b0_1111_1_01 }, buf[0..nwritten]);
- }
-
- var code = ArrayList(u8).init(testing.allocator);
- defer code.deinit();
-
- {
- // vmovapd xmm1, xmm2
- const encoder = try Encoder.init(&code, 4);
- var vex = Encoder.Vex{};
- vex.simd_prefix_66();
- encoder.vex(vex); // use 64 bit operation
- encoder.opcode_1byte(0x28);
- encoder.modRm_direct(0, Register.xmm1.lowEnc());
- try testing.expectEqualSlices(u8, &[_]u8{ 0xC5, 0xF9, 0x28, 0xC1 }, code.items);
- }
-
- {
- try code.resize(0);
-
- // vmovhpd xmm13, xmm1, qword ptr [rip]
- const encoder = try Encoder.init(&code, 9);
- var vex = Encoder.Vex{};
- vex.len_128();
- vex.simd_prefix_66();
- vex.lead_opc_0f();
- vex.rex(.{ .r = true });
- vex.reg(Register.xmm1.enc());
- encoder.vex(vex);
- encoder.opcode_1byte(0x16);
- encoder.modRm_RIPDisp32(Register.xmm13.lowEnc());
- encoder.disp32(0);
- try testing.expectEqualSlices(u8, &[_]u8{ 0xC5, 0x71, 0x16, 0x2D, 0x00, 0x00, 0x00, 0x00 }, code.items);
- }
-}
-
-// TODO add these registers to the enum and populate dwarfLocOp
-// // Return Address register. This is stored in `0(%rsp, "")` and is not a physical register.
-// RA = (16, "RA"),
-//
-// XMM0 = (17, "xmm0"),
-// XMM1 = (18, "xmm1"),
-// XMM2 = (19, "xmm2"),
-// XMM3 = (20, "xmm3"),
-// XMM4 = (21, "xmm4"),
-// XMM5 = (22, "xmm5"),
-// XMM6 = (23, "xmm6"),
-// XMM7 = (24, "xmm7"),
-//
-// XMM8 = (25, "xmm8"),
-// XMM9 = (26, "xmm9"),
-// XMM10 = (27, "xmm10"),
-// XMM11 = (28, "xmm11"),
-// XMM12 = (29, "xmm12"),
-// XMM13 = (30, "xmm13"),
-// XMM14 = (31, "xmm14"),
-// XMM15 = (32, "xmm15"),
-//
-// ST0 = (33, "st0"),
-// ST1 = (34, "st1"),
-// ST2 = (35, "st2"),
-// ST3 = (36, "st3"),
-// ST4 = (37, "st4"),
-// ST5 = (38, "st5"),
-// ST6 = (39, "st6"),
-// ST7 = (40, "st7"),
-//
-// MM0 = (41, "mm0"),
-// MM1 = (42, "mm1"),
-// MM2 = (43, "mm2"),
-// MM3 = (44, "mm3"),
-// MM4 = (45, "mm4"),
-// MM5 = (46, "mm5"),
-// MM6 = (47, "mm6"),
-// MM7 = (48, "mm7"),
-//
-// RFLAGS = (49, "rFLAGS"),
-// ES = (50, "es"),
-// CS = (51, "cs"),
-// SS = (52, "ss"),
-// DS = (53, "ds"),
-// FS = (54, "fs"),
-// GS = (55, "gs"),
-//
-// FS_BASE = (58, "fs.base"),
-// GS_BASE = (59, "gs.base"),
-//
-// TR = (62, "tr"),
-// LDTR = (63, "ldtr"),
-// MXCSR = (64, "mxcsr"),
-// FCW = (65, "fcw"),
-// FSW = (66, "fsw"),
-//
-// XMM16 = (67, "xmm16"),
-// XMM17 = (68, "xmm17"),
-// XMM18 = (69, "xmm18"),
-// XMM19 = (70, "xmm19"),
-// XMM20 = (71, "xmm20"),
-// XMM21 = (72, "xmm21"),
-// XMM22 = (73, "xmm22"),
-// XMM23 = (74, "xmm23"),
-// XMM24 = (75, "xmm24"),
-// XMM25 = (76, "xmm25"),
-// XMM26 = (77, "xmm26"),
-// XMM27 = (78, "xmm27"),
-// XMM28 = (79, "xmm28"),
-// XMM29 = (80, "xmm29"),
-// XMM30 = (81, "xmm30"),
-// XMM31 = (82, "xmm31"),
-//
-// K0 = (118, "k0"),
-// K1 = (119, "k1"),
-// K2 = (120, "k2"),
-// K3 = (121, "k3"),
-// K4 = (122, "k4"),
-// K5 = (123, "k5"),
-// K6 = (124, "k6"),
-// K7 = (125, "k7"),
src/arch/x86_64/CodeGen.zig
@@ -303,7 +303,12 @@ pub fn generate(
var call_info = function.resolveCallingConventionValues(fn_type) catch |err| switch (err) {
error.CodegenFail => return Result{ .fail = function.err_msg.? },
error.OutOfRegisters => return Result{
- .fail = try ErrorMsg.create(bin_file.allocator, src_loc, "CodeGen ran out of registers. This is a bug in the Zig compiler.", .{}),
+ .fail = try ErrorMsg.create(
+ bin_file.allocator,
+ src_loc,
+ "CodeGen ran out of registers. This is a bug in the Zig compiler.",
+ .{},
+ ),
},
else => |e| return e,
};
@@ -342,6 +347,20 @@ pub fn generate(
defer emit.deinit();
emit.lowerMir() catch |err| switch (err) {
error.EmitFail => return Result{ .fail = emit.err_msg.? },
+ error.InvalidInstruction, error.CannotEncode => |e| {
+ const msg = switch (e) {
+ error.InvalidInstruction => "CodeGen failed to find a viable instruction.",
+ error.CannotEncode => "CodeGen failed to encode the instruction.",
+ };
+ return Result{
+ .fail = try ErrorMsg.create(
+ bin_file.allocator,
+ src_loc,
+ "{s} This is a bug in the Zig compiler.",
+ .{msg},
+ ),
+ };
+ },
else => |e| return e,
};
@@ -1687,7 +1706,7 @@ fn genIntMulDivOpMir(
else => unreachable,
},
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
},
else => unreachable,
@@ -2191,7 +2210,7 @@ fn genSliceElemPtr(self: *Self, lhs: Air.Inst.Ref, rhs: Air.Inst.Ref) !MCValue {
.reg2 = .rbp,
.flags = 0b01,
}),
- .data = .{ .imm = @bitCast(u32, -@intCast(i32, off)) },
+ .data = .{ .disp = -@intCast(i32, off) },
});
},
else => return self.fail("TODO implement slice_elem_ptr when slice is {}", .{slice_mcv}),
@@ -2275,7 +2294,7 @@ fn airArrayElemVal(self: *Self, inst: Air.Inst.Index) !void {
.reg1 = addr_reg.to64(),
.reg2 = .rbp,
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
},
.stack_offset => |off| {
@@ -2286,7 +2305,7 @@ fn airArrayElemVal(self: *Self, inst: Air.Inst.Index) !void {
.reg1 = addr_reg.to64(),
.reg2 = .rbp,
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
},
.memory, .linker_load => {
@@ -2352,7 +2371,7 @@ fn airPtrElemVal(self: *Self, inst: Air.Inst.Index) !void {
.reg2 = dst_mcv.register,
.flags = 0b01,
}),
- .data = .{ .imm = 0 },
+ .data = .{ .disp = 0 },
});
break :result .{ .register = registerAlias(dst_mcv.register, @intCast(u32, elem_abi_size)) };
}
@@ -2615,7 +2634,7 @@ fn load(self: *Self, dst_mcv: MCValue, ptr: MCValue, ptr_ty: Type) InnerError!vo
.reg2 = reg,
.flags = 0b01,
}),
- .data = .{ .imm = 0 },
+ .data = .{ .disp = 0 },
});
},
.stack_offset => |off| {
@@ -2842,7 +2861,7 @@ fn store(self: *Self, ptr: MCValue, value: MCValue, ptr_ty: Type, value_ty: Type
.reg2 = addr_reg.to64(),
.flags = 0b01,
}),
- .data = .{ .imm = 0 },
+ .data = .{ .disp = 0 },
});
const new_ptr = MCValue{ .register = addr_reg.to64() };
@@ -2903,7 +2922,7 @@ fn store(self: *Self, ptr: MCValue, value: MCValue, ptr_ty: Type, value_ty: Type
.reg2 = tmp_reg,
.flags = 0b01,
}),
- .data = .{ .imm = 0 },
+ .data = .{ .disp = 0 },
});
return self.store(new_ptr, .{ .register = tmp_reg }, ptr_ty, value_ty);
}
@@ -3542,25 +3561,13 @@ fn genBinOpMir(self: *Self, mir_tag: Mir.Inst.Tag, dst_ty: Type, dst_mcv: MCValu
if (intrinsicsAllowed(self.target.*, dst_ty)) {
const actual_tag: Mir.Inst.Tag = switch (dst_ty.tag()) {
.f32 => switch (mir_tag) {
- .add => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.add_f32_avx
- else
- Mir.Inst.Tag.add_f32_sse,
- .cmp => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.cmp_f32_avx
- else
- Mir.Inst.Tag.cmp_f32_sse,
+ .add => Mir.Inst.Tag.add_f32,
+ .cmp => Mir.Inst.Tag.cmp_f32,
else => return self.fail("TODO genBinOpMir for f32 register-register with MIR tag {}", .{mir_tag}),
},
.f64 => switch (mir_tag) {
- .add => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.add_f64_avx
- else
- Mir.Inst.Tag.add_f64_sse,
- .cmp => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.cmp_f64_avx
- else
- Mir.Inst.Tag.cmp_f64_sse,
+ .add => Mir.Inst.Tag.add_f64,
+ .cmp => Mir.Inst.Tag.cmp_f64,
else => return self.fail("TODO genBinOpMir for f64 register-register with MIR tag {}", .{mir_tag}),
},
else => return self.fail("TODO genBinOpMir for float register-register and type {}", .{dst_ty.fmtDebug()}),
@@ -3618,7 +3625,7 @@ fn genBinOpMir(self: *Self, mir_tag: Mir.Inst.Tag, dst_ty: Type, dst_mcv: MCValu
.reg2 = .rbp,
.flags = 0b01,
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
},
}
@@ -3644,7 +3651,7 @@ fn genBinOpMir(self: *Self, mir_tag: Mir.Inst.Tag, dst_ty: Type, dst_mcv: MCValu
.reg2 = registerAlias(src_reg, abi_size),
.flags = 0b10,
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
},
.immediate => |imm| {
@@ -3665,7 +3672,7 @@ fn genBinOpMir(self: *Self, mir_tag: Mir.Inst.Tag, dst_ty: Type, dst_mcv: MCValu
else => unreachable,
};
const payload = try self.addExtra(Mir.ImmPair{
- .dest_off = @bitCast(u32, -off),
+ .dest_off = -off,
.operand = @truncate(u32, imm),
});
_ = try self.addInst(.{
@@ -3756,7 +3763,7 @@ fn genIntMulComplexOpMir(self: *Self, dst_ty: Type, dst_mcv: MCValue, src_mcv: M
.reg2 = .rbp,
.flags = 0b01,
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
},
.memory => {
@@ -5360,7 +5367,7 @@ fn genSetStackArg(self: *Self, ty: Type, stack_offset: i32, mcv: MCValue) InnerE
// offset from rbp, which is at the top of the stack frame.
// mov [rbp+offset], immediate
const payload = try self.addExtra(Mir.ImmPair{
- .dest_off = @bitCast(u32, -stack_offset),
+ .dest_off = -stack_offset,
.operand = @truncate(u32, imm),
});
_ = try self.addInst(.{
@@ -5400,14 +5407,8 @@ fn genSetStackArg(self: *Self, ty: Type, stack_offset: i32, mcv: MCValue) InnerE
.Float => {
if (intrinsicsAllowed(self.target.*, ty)) {
const tag: Mir.Inst.Tag = switch (ty.tag()) {
- .f32 => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.mov_f32_avx
- else
- Mir.Inst.Tag.mov_f32_sse,
- .f64 => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.mov_f64_avx
- else
- Mir.Inst.Tag.mov_f64_sse,
+ .f32 => Mir.Inst.Tag.mov_f32,
+ .f64 => Mir.Inst.Tag.mov_f64,
else => return self.fail("TODO genSetStackArg for register for type {}", .{ty.fmtDebug()}),
};
_ = try self.addInst(.{
@@ -5421,7 +5422,7 @@ fn genSetStackArg(self: *Self, ty: Type, stack_offset: i32, mcv: MCValue) InnerE
.reg2 = reg.to128(),
.flags = 0b01,
}),
- .data = .{ .imm = @bitCast(u32, -stack_offset) },
+ .data = .{ .disp = -stack_offset },
});
return;
}
@@ -5436,7 +5437,7 @@ fn genSetStackArg(self: *Self, ty: Type, stack_offset: i32, mcv: MCValue) InnerE
.reg2 = registerAlias(reg, @intCast(u32, abi_size)),
.flags = 0b10,
}),
- .data = .{ .imm = @bitCast(u32, -stack_offset) },
+ .data = .{ .disp = -stack_offset },
});
},
}
@@ -5516,7 +5517,7 @@ fn genSetStack(self: *Self, ty: Type, stack_offset: i32, mcv: MCValue, opts: Inl
0 => {
assert(ty.isError());
const payload = try self.addExtra(Mir.ImmPair{
- .dest_off = @bitCast(u32, -stack_offset),
+ .dest_off = -stack_offset,
.operand = @truncate(u32, x_big),
});
_ = try self.addInst(.{
@@ -5530,7 +5531,7 @@ fn genSetStack(self: *Self, ty: Type, stack_offset: i32, mcv: MCValue, opts: Inl
},
1, 2, 4 => {
const payload = try self.addExtra(Mir.ImmPair{
- .dest_off = @bitCast(u32, -stack_offset),
+ .dest_off = -stack_offset,
.operand = @truncate(u32, x_big),
});
_ = try self.addInst(.{
@@ -5552,7 +5553,7 @@ fn genSetStack(self: *Self, ty: Type, stack_offset: i32, mcv: MCValue, opts: Inl
// insted just use two 32 bit writes to avoid register allocation
{
const payload = try self.addExtra(Mir.ImmPair{
- .dest_off = @bitCast(u32, -stack_offset + 4),
+ .dest_off = -stack_offset + 4,
.operand = @truncate(u32, x_big >> 32),
});
_ = try self.addInst(.{
@@ -5566,7 +5567,7 @@ fn genSetStack(self: *Self, ty: Type, stack_offset: i32, mcv: MCValue, opts: Inl
}
{
const payload = try self.addExtra(Mir.ImmPair{
- .dest_off = @bitCast(u32, -stack_offset),
+ .dest_off = -stack_offset,
.operand = @truncate(u32, x_big),
});
_ = try self.addInst(.{
@@ -5595,14 +5596,8 @@ fn genSetStack(self: *Self, ty: Type, stack_offset: i32, mcv: MCValue, opts: Inl
.Float => {
if (intrinsicsAllowed(self.target.*, ty)) {
const tag: Mir.Inst.Tag = switch (ty.tag()) {
- .f32 => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.mov_f32_avx
- else
- Mir.Inst.Tag.mov_f32_sse,
- .f64 => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.mov_f64_avx
- else
- Mir.Inst.Tag.mov_f64_sse,
+ .f32 => Mir.Inst.Tag.mov_f32,
+ .f64 => Mir.Inst.Tag.mov_f64,
else => return self.fail("TODO genSetStack for register for type {}", .{ty.fmtDebug()}),
};
_ = try self.addInst(.{
@@ -5616,7 +5611,7 @@ fn genSetStack(self: *Self, ty: Type, stack_offset: i32, mcv: MCValue, opts: Inl
.reg2 = reg.to128(),
.flags = 0b01,
}),
- .data = .{ .imm = @bitCast(u32, -stack_offset) },
+ .data = .{ .disp = -stack_offset },
});
return;
}
@@ -5691,7 +5686,7 @@ fn genInlineMemcpyRegisterRegister(
.reg2 = registerAlias(tmp_reg, nearest_power_of_two),
.flags = 0b10,
}),
- .data = .{ .imm = @bitCast(u32, -next_offset) },
+ .data = .{ .disp = -next_offset },
});
if (nearest_power_of_two > 1) {
@@ -5711,7 +5706,7 @@ fn genInlineMemcpyRegisterRegister(
.reg2 = registerAlias(src_reg, @intCast(u32, abi_size)),
.flags = 0b10,
}),
- .data = .{ .imm = @bitCast(u32, -offset) },
+ .data = .{ .disp = -offset },
});
}
}
@@ -5758,7 +5753,7 @@ fn genInlineMemcpy(
.reg1 = dst_addr_reg.to64(),
.reg2 = opts.dest_stack_base orelse .rbp,
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
},
.register => |reg| {
@@ -5787,7 +5782,7 @@ fn genInlineMemcpy(
.reg1 = src_addr_reg.to64(),
.reg2 = opts.source_stack_base orelse .rbp,
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
},
.register => |reg| {
@@ -5911,7 +5906,7 @@ fn genInlineMemset(
.reg1 = addr_reg.to64(),
.reg2 = opts.dest_stack_base orelse .rbp,
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
},
.register => |reg| {
@@ -5998,7 +5993,7 @@ fn genSetReg(self: *Self, ty: Type, reg: Register, mcv: MCValue) InnerError!void
.reg1 = registerAlias(reg, abi_size),
.reg2 = .rbp,
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
},
.unreach, .none => return, // Nothing to do.
@@ -6097,14 +6092,8 @@ fn genSetReg(self: *Self, ty: Type, reg: Register, mcv: MCValue) InnerError!void
.Float => {
if (intrinsicsAllowed(self.target.*, ty)) {
const tag: Mir.Inst.Tag = switch (ty.tag()) {
- .f32 => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.mov_f32_avx
- else
- Mir.Inst.Tag.mov_f32_sse,
- .f64 => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.mov_f64_avx
- else
- Mir.Inst.Tag.mov_f64_sse,
+ .f32 => Mir.Inst.Tag.mov_f32,
+ .f64 => Mir.Inst.Tag.mov_f64,
else => return self.fail("TODO genSetReg from register for {}", .{ty.fmtDebug()}),
};
_ = try self.addInst(.{
@@ -6141,14 +6130,8 @@ fn genSetReg(self: *Self, ty: Type, reg: Register, mcv: MCValue) InnerError!void
if (intrinsicsAllowed(self.target.*, ty)) {
const tag: Mir.Inst.Tag = switch (ty.tag()) {
- .f32 => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.mov_f32_avx
- else
- Mir.Inst.Tag.mov_f32_sse,
- .f64 => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.mov_f64_avx
- else
- Mir.Inst.Tag.mov_f64_sse,
+ .f32 => Mir.Inst.Tag.mov_f32,
+ .f64 => Mir.Inst.Tag.mov_f64,
else => return self.fail("TODO genSetReg from memory for {}", .{ty.fmtDebug()}),
};
@@ -6162,7 +6145,7 @@ fn genSetReg(self: *Self, ty: Type, reg: Register, mcv: MCValue) InnerError!void
else => unreachable,
},
}),
- .data = .{ .imm = 0 },
+ .data = .{ .disp = 0 },
});
return;
}
@@ -6178,7 +6161,7 @@ fn genSetReg(self: *Self, ty: Type, reg: Register, mcv: MCValue) InnerError!void
.reg2 = reg.to64(),
.flags = 0b01,
}),
- .data = .{ .imm = 0 },
+ .data = .{ .disp = 0 },
});
},
}
@@ -6190,14 +6173,8 @@ fn genSetReg(self: *Self, ty: Type, reg: Register, mcv: MCValue) InnerError!void
if (intrinsicsAllowed(self.target.*, ty)) {
const tag: Mir.Inst.Tag = switch (ty.tag()) {
- .f32 => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.mov_f32_avx
- else
- Mir.Inst.Tag.mov_f32_sse,
- .f64 => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.mov_f64_avx
- else
- Mir.Inst.Tag.mov_f64_sse,
+ .f32 => Mir.Inst.Tag.mov_f32,
+ .f64 => Mir.Inst.Tag.mov_f64,
else => return self.fail("TODO genSetReg from memory for {}", .{ty.fmtDebug()}),
};
@@ -6211,7 +6188,7 @@ fn genSetReg(self: *Self, ty: Type, reg: Register, mcv: MCValue) InnerError!void
else => unreachable,
},
}),
- .data = .{ .imm = 0 },
+ .data = .{ .disp = 0 },
});
return;
}
@@ -6255,7 +6232,7 @@ fn genSetReg(self: *Self, ty: Type, reg: Register, mcv: MCValue) InnerError!void
.reg2 = reg.to64(),
.flags = 0b01,
}),
- .data = .{ .imm = 0 },
+ .data = .{ .disp = 0 },
});
}
}
@@ -6283,7 +6260,7 @@ fn genSetReg(self: *Self, ty: Type, reg: Register, mcv: MCValue) InnerError!void
.reg2 = .rbp,
.flags = flags,
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
return;
}
@@ -6302,7 +6279,7 @@ fn genSetReg(self: *Self, ty: Type, reg: Register, mcv: MCValue) InnerError!void
.reg2 = .rbp,
.flags = flags,
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
return;
}
@@ -6311,14 +6288,8 @@ fn genSetReg(self: *Self, ty: Type, reg: Register, mcv: MCValue) InnerError!void
.Float => {
if (intrinsicsAllowed(self.target.*, ty)) {
const tag: Mir.Inst.Tag = switch (ty.tag()) {
- .f32 => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.mov_f32_avx
- else
- Mir.Inst.Tag.mov_f32_sse,
- .f64 => if (hasAvxSupport(self.target.*))
- Mir.Inst.Tag.mov_f64_avx
- else
- Mir.Inst.Tag.mov_f64_sse,
+ .f32 => Mir.Inst.Tag.mov_f32,
+ .f64 => Mir.Inst.Tag.mov_f64,
else => return self.fail("TODO genSetReg from stack offset for {}", .{ty.fmtDebug()}),
};
_ = try self.addInst(.{
@@ -6331,7 +6302,7 @@ fn genSetReg(self: *Self, ty: Type, reg: Register, mcv: MCValue) InnerError!void
else => unreachable,
},
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
return;
}
@@ -6347,7 +6318,7 @@ fn genSetReg(self: *Self, ty: Type, reg: Register, mcv: MCValue) InnerError!void
.reg2 = .rbp,
.flags = 0b01,
}),
- .data = .{ .imm = @bitCast(u32, -off) },
+ .data = .{ .disp = -off },
});
},
}
@@ -6436,7 +6407,7 @@ fn airFloatToInt(self: *Self, inst: Air.Inst.Index) !void {
else => |size| return self.fail("TODO load ST(0) with abiSize={}", .{size}),
},
}),
- .data = .{ .imm = @bitCast(u32, -stack_offset) },
+ .data = .{ .disp = -stack_offset },
});
// convert
@@ -6452,7 +6423,7 @@ fn airFloatToInt(self: *Self, inst: Air.Inst.Index) !void {
else => |size| return self.fail("TODO convert float with abiSize={}", .{size}),
},
}),
- .data = .{ .imm = @bitCast(u32, -stack_dst.stack_offset) },
+ .data = .{ .disp = -stack_dst.stack_offset },
});
return self.finishAir(inst, stack_dst, .{ ty_op.operand, .none, .none });
@@ -6551,7 +6522,7 @@ fn airMemcpy(self: *Self, inst: Air.Inst.Index) !void {
.reg2 = reg,
.flags = 0b01,
}),
- .data = .{ .imm = 0 },
+ .data = .{ .disp = 0 },
});
break :blk MCValue{ .register = reg };
},
src/arch/x86_64/Emit.zig
@@ -1,3 +1,4 @@
+//!
//! This file contains the functionality for lowering x86_64 MIR into
//! machine code
@@ -7,6 +8,7 @@ const std = @import("std");
const assert = std.debug.assert;
const bits = @import("bits.zig");
const abi = @import("abi.zig");
+const encoder = @import("encoder.zig");
const link = @import("../../link.zig");
const log = std.log.scoped(.codegen);
const math = std.math;
@@ -19,12 +21,13 @@ const CodeGen = @import("CodeGen.zig");
const DebugInfoOutput = @import("../../codegen.zig").DebugInfoOutput;
const Encoder = bits.Encoder;
const ErrorMsg = Module.ErrorMsg;
+const Instruction = encoder.Instruction;
const MCValue = @import("CodeGen.zig").MCValue;
+const Memory = bits.Memory;
const Mir = @import("Mir.zig");
const Module = @import("../../Module.zig");
-const Instruction = bits.Instruction;
-const Type = @import("../../type.zig").Type;
const Register = bits.Register;
+const Type = @import("../../type.zig").Type;
mir: Mir,
bin_file: *link.File,
@@ -45,6 +48,8 @@ relocs: std.ArrayListUnmanaged(Reloc) = .{},
const InnerError = error{
OutOfMemory,
EmitFail,
+ InvalidInstruction,
+ CannotEncode,
};
const Reloc = struct {
@@ -153,8 +158,8 @@ pub fn lowerMir(emit: *Emit) InnerError!void {
.push => try emit.mirPushPop(.push, inst),
.pop => try emit.mirPushPop(.pop, inst),
- .jmp => try emit.mirJmpCall(.jmp_near, inst),
- .call => try emit.mirJmpCall(.call_near, inst),
+ .jmp => try emit.mirJmpCall(.jmp, inst),
+ .call => try emit.mirJmpCall(.call, inst),
.cond_jmp => try emit.mirCondJmp(inst),
.cond_set_byte => try emit.mirCondSetByte(inst),
@@ -170,25 +175,15 @@ pub fn lowerMir(emit: *Emit) InnerError!void {
.interrupt => try emit.mirInterrupt(inst),
.nop => {}, // just skip it
- // SSE instructions
- .mov_f64_sse => try emit.mirMovFloatSse(.movsd, inst),
- .mov_f32_sse => try emit.mirMovFloatSse(.movss, inst),
-
- .add_f64_sse => try emit.mirAddFloatSse(.addsd, inst),
- .add_f32_sse => try emit.mirAddFloatSse(.addss, inst),
-
- .cmp_f64_sse => try emit.mirCmpFloatSse(.ucomisd, inst),
- .cmp_f32_sse => try emit.mirCmpFloatSse(.ucomiss, inst),
+ // SSE/AVX instructions
+ .mov_f64 => try emit.mirMovFloat(.movsd, inst),
+ .mov_f32 => try emit.mirMovFloat(.movss, inst),
- // AVX instructions
- .mov_f64_avx => try emit.mirMovFloatAvx(.vmovsd, inst),
- .mov_f32_avx => try emit.mirMovFloatAvx(.vmovss, inst),
+ .add_f64 => try emit.mirAddFloat(.addsd, inst),
+ .add_f32 => try emit.mirAddFloat(.addss, inst),
- .add_f64_avx => try emit.mirAddFloatAvx(.vaddsd, inst),
- .add_f32_avx => try emit.mirAddFloatAvx(.vaddss, inst),
-
- .cmp_f64_avx => try emit.mirCmpFloatAvx(.vucomisd, inst),
- .cmp_f32_avx => try emit.mirCmpFloatAvx(.vucomiss, inst),
+ .cmp_f64 => try emit.mirCmpFloat(.ucomisd, inst),
+ .cmp_f32 => try emit.mirCmpFloat(.ucomiss, inst),
// Pseudo-instructions
.call_extern => try emit.mirCallExtern(inst),
@@ -235,8 +230,23 @@ fn fixupRelocs(emit: *Emit) InnerError!void {
}
}
+fn encode(emit: *Emit, mnemonic: Instruction.Mnemonic, ops: struct {
+ op1: Instruction.Operand = .none,
+ op2: Instruction.Operand = .none,
+ op3: Instruction.Operand = .none,
+ op4: Instruction.Operand = .none,
+}) InnerError!void {
+ const inst = try Instruction.new(mnemonic, .{
+ .op1 = ops.op1,
+ .op2 = ops.op2,
+ .op3 = ops.op3,
+ .op4 = ops.op4,
+ });
+ return inst.encode(emit.code.writer());
+}
+
fn mirUndefinedInstruction(emit: *Emit) InnerError!void {
- return lowerToZoEnc(.ud2, emit.code);
+ return emit.encode(.ud2, .{});
}
fn mirInterrupt(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
@@ -244,45 +254,43 @@ fn mirInterrupt(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
assert(tag == .interrupt);
const ops = emit.mir.instructions.items(.ops)[inst].decode();
switch (ops.flags) {
- 0b00 => return lowerToZoEnc(.int3, emit.code),
+ 0b00 => return emit.encode(.int3, .{}),
else => return emit.fail("TODO handle variant 0b{b} of interrupt instruction", .{ops.flags}),
}
}
fn mirSyscall(emit: *Emit) InnerError!void {
- return lowerToZoEnc(.syscall, emit.code);
+ return emit.encode(.syscall, .{});
}
-fn mirPushPop(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirPushPop(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
switch (ops.flags) {
0b00 => {
- // PUSH/POP reg
- return lowerToOEnc(tag, ops.reg1, emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ });
},
0b01 => {
- // PUSH/POP r/m64
- const imm = emit.mir.instructions.items(.data)[inst].imm;
- const ptr_size: Memory.PtrSize = switch (immOpSize(imm)) {
- 16 => .word_ptr,
- else => .qword_ptr,
- };
- return lowerToMEnc(tag, RegisterOrMemory.mem(ptr_size, .{
- .disp = imm,
- .base = ops.reg1,
- }), emit.code);
+ const disp = emit.mir.instructions.items(.data)[inst].disp;
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .mem = Memory.sib(.qword, .{
+ .base = ops.reg1,
+ .disp = disp,
+ }) },
+ });
},
0b10 => {
- // PUSH imm32
- assert(tag == .push);
const imm = emit.mir.instructions.items(.data)[inst].imm;
- return lowerToIEnc(.push, imm, emit.code);
+ return emit.encode(.push, .{
+ .op1 = .{ .imm = imm },
+ });
},
0b11 => unreachable,
}
}
-fn mirPushPopRegisterList(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirPushPopRegisterList(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
const payload = emit.mir.instructions.items(.data)[inst].payload;
const save_reg_list = emit.mir.extraData(Mir.SaveRegisterList, payload).data;
@@ -291,15 +299,20 @@ fn mirPushPopRegisterList(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerErro
const callee_preserved_regs = abi.getCalleePreservedRegs(emit.target.*);
for (callee_preserved_regs) |reg| {
if (reg_list.isSet(callee_preserved_regs, reg)) {
- switch (tag) {
- .push => try lowerToMrEnc(.mov, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = @bitCast(u32, disp),
- .base = ops.reg1,
- }), reg, emit.code),
- .pop => try lowerToRmEnc(.mov, reg, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = @bitCast(u32, disp),
- .base = ops.reg1,
- }), emit.code),
+ const op1: Instruction.Operand = .{ .mem = Memory.sib(.qword, .{
+ .base = ops.reg1,
+ .disp = disp,
+ }) };
+ const op2: Instruction.Operand = .{ .reg = reg };
+ switch (mnemonic) {
+ .push => try emit.encode(.mov, .{
+ .op1 = op1,
+ .op2 = op2,
+ }),
+ .pop => try emit.encode(.mov, .{
+ .op1 = op2,
+ .op2 = op1,
+ }),
else => unreachable,
}
disp += 8;
@@ -307,13 +320,17 @@ fn mirPushPopRegisterList(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerErro
}
}
-fn mirJmpCall(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirJmpCall(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
switch (ops.flags) {
0b00 => {
const target = emit.mir.instructions.items(.data)[inst].inst;
const source = emit.code.items.len;
- try lowerToDEnc(tag, 0, emit.code);
+ try emit.encode(mnemonic, .{
+ .op1 = .{
+ .imm = 0,
+ },
+ });
try emit.relocs.append(emit.bin_file.allocator, .{
.source = source,
.target = target,
@@ -323,34 +340,33 @@ fn mirJmpCall(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
},
0b01 => {
if (ops.reg1 == .none) {
- // JMP/CALL [imm]
const imm = emit.mir.instructions.items(.data)[inst].imm;
- const ptr_size: Memory.PtrSize = switch (immOpSize(imm)) {
- 16 => .word_ptr,
- else => .qword_ptr,
- };
- return lowerToMEnc(tag, RegisterOrMemory.mem(ptr_size, .{ .disp = imm }), emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .imm = imm },
+ });
}
- // JMP/CALL reg
- return lowerToMEnc(tag, RegisterOrMemory.reg(ops.reg1), emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ });
},
0b10 => {
- // JMP/CALL r/m64
- const imm = emit.mir.instructions.items(.data)[inst].imm;
- return lowerToMEnc(tag, RegisterOrMemory.mem(Memory.PtrSize.new(ops.reg1.size()), .{
- .disp = imm,
- .base = ops.reg1,
- }), emit.code);
+ const disp = emit.mir.instructions.items(.data)[inst].disp;
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .mem = Memory.sib(.qword, .{
+ .base = ops.reg1,
+ .disp = disp,
+ }) },
+ });
},
0b11 => return emit.fail("TODO unused variant jmp/call 0b11", .{}),
}
}
fn mirCondJmp(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
- const mir_tag = emit.mir.instructions.items(.tag)[inst];
- assert(mir_tag == .cond_jmp);
+ const tag = emit.mir.instructions.items(.tag)[inst];
+ assert(tag == .cond_jmp);
const inst_cc = emit.mir.instructions.items(.data)[inst].inst_cc;
- const tag: Tag = switch (inst_cc.cc) {
+ const mnemonic: Instruction.Mnemonic = switch (inst_cc.cc) {
.a => .ja,
.ae => .jae,
.b => .jb,
@@ -383,7 +399,9 @@ fn mirCondJmp(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
.z => .jz,
};
const source = emit.code.items.len;
- try lowerToDEnc(tag, 0, emit.code);
+ try emit.encode(mnemonic, .{
+ .op1 = .{ .imm = 0 },
+ });
try emit.relocs.append(emit.bin_file.allocator, .{
.source = source,
.target = inst_cc.inst,
@@ -393,11 +411,11 @@ fn mirCondJmp(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
}
fn mirCondSetByte(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
- const mir_tag = emit.mir.instructions.items(.tag)[inst];
- assert(mir_tag == .cond_set_byte);
+ const tag = emit.mir.instructions.items(.tag)[inst];
+ assert(tag == .cond_set_byte);
const ops = emit.mir.instructions.items(.ops)[inst].decode();
const cc = emit.mir.instructions.items(.data)[inst].cc;
- const tag: Tag = switch (cc) {
+ const mnemonic: Instruction.Mnemonic = switch (cc) {
.a => .seta,
.ae => .setae,
.b => .setb,
@@ -429,15 +447,15 @@ fn mirCondSetByte(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
.s => .sets,
.z => .setz,
};
- return lowerToMEnc(tag, RegisterOrMemory.reg(ops.reg1.to8()), emit.code);
+ return emit.encode(mnemonic, .{ .op1 = .{ .reg = ops.reg1 } });
}
fn mirCondMov(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
- const mir_tag = emit.mir.instructions.items(.tag)[inst];
- assert(mir_tag == .cond_mov);
+ const tag = emit.mir.instructions.items(.tag)[inst];
+ assert(tag == .cond_mov);
const ops = emit.mir.instructions.items(.ops)[inst].decode();
const cc = emit.mir.instructions.items(.data)[inst].cc;
- const tag: Tag = switch (cc) {
+ const mnemonic: Instruction.Mnemonic = switch (cc) {
.a => .cmova,
.ae => .cmovae,
.b => .cmovb,
@@ -469,21 +487,28 @@ fn mirCondMov(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
.s => .cmovs,
.z => .cmovz,
};
+ const op1: Instruction.Operand = .{ .reg = ops.reg1 };
if (ops.flags == 0b00) {
- return lowerToRmEnc(tag, ops.reg1, RegisterOrMemory.reg(ops.reg2), emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = op1,
+ .op2 = .{ .reg = ops.reg2 },
+ });
}
- const imm = emit.mir.instructions.items(.data)[inst].imm;
+ const disp = emit.mir.instructions.items(.data)[inst].disp;
const ptr_size: Memory.PtrSize = switch (ops.flags) {
0b00 => unreachable,
- 0b01 => .word_ptr,
- 0b10 => .dword_ptr,
- 0b11 => .qword_ptr,
+ 0b01 => .word,
+ 0b10 => .dword,
+ 0b11 => .qword,
};
- return lowerToRmEnc(tag, ops.reg1, RegisterOrMemory.mem(ptr_size, .{
- .disp = imm,
- .base = ops.reg2,
- }), emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = op1,
+ .op2 = .{ .mem = Memory.sib(ptr_size, .{
+ .base = ops.reg2,
+ .disp = disp,
+ }) },
+ });
}
fn mirTest(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
@@ -493,18 +518,16 @@ fn mirTest(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
switch (ops.flags) {
0b00 => {
if (ops.reg2 == .none) {
- // TEST r/m64, imm32
- // MI
const imm = emit.mir.instructions.items(.data)[inst].imm;
- if (ops.reg1.to64() == .rax) {
- // TEST rax, imm32
- // I
- return lowerToIEnc(.@"test", imm, emit.code);
- }
- return lowerToMiEnc(.@"test", RegisterOrMemory.reg(ops.reg1), imm, emit.code);
+ return emit.encode(.@"test", .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .imm = imm },
+ });
}
- // TEST r/m64, r64
- return lowerToMrEnc(.@"test", RegisterOrMemory.reg(ops.reg1), ops.reg2, emit.code);
+ return emit.encode(.@"test", .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .reg = ops.reg2 },
+ });
},
else => return emit.fail("TODO more TEST alternatives", .{}),
}
@@ -515,62 +538,59 @@ fn mirRet(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
assert(tag == .ret);
const ops = emit.mir.instructions.items(.ops)[inst].decode();
switch (ops.flags) {
- 0b00 => {
- // RETF imm16
- // I
- const imm = emit.mir.instructions.items(.data)[inst].imm;
- return lowerToIEnc(.ret_far, imm, emit.code);
- },
- 0b01 => {
- return lowerToZoEnc(.ret_far, emit.code);
- },
+ 0b00 => unreachable,
+ 0b01 => unreachable,
0b10 => {
- // RET imm16
- // I
const imm = emit.mir.instructions.items(.data)[inst].imm;
- return lowerToIEnc(.ret_near, imm, emit.code);
+ return emit.encode(.ret, .{
+ .op1 = .{ .imm = imm },
+ });
},
0b11 => {
- return lowerToZoEnc(.ret_near, emit.code);
+ return emit.encode(.ret, .{});
},
}
}
-fn mirArith(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirArith(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
switch (ops.flags) {
0b00 => {
if (ops.reg2 == .none) {
- // mov reg1, imm32
- // MI
const imm = emit.mir.instructions.items(.data)[inst].imm;
- return lowerToMiEnc(tag, RegisterOrMemory.reg(ops.reg1), imm, emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .imm = imm },
+ });
}
- // mov reg1, reg2
- // RM
- return lowerToRmEnc(tag, ops.reg1, RegisterOrMemory.reg(ops.reg2), emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .reg = ops.reg2 },
+ });
},
0b01 => {
- // mov reg1, [reg2 + imm32]
- // RM
- const imm = emit.mir.instructions.items(.data)[inst].imm;
- const src_reg: ?Register = if (ops.reg2 != .none) ops.reg2 else null;
- return lowerToRmEnc(tag, ops.reg1, RegisterOrMemory.mem(Memory.PtrSize.new(ops.reg1.size()), .{
- .disp = imm,
- .base = src_reg,
- }), emit.code);
+ const disp = emit.mir.instructions.items(.data)[inst].disp;
+ const base: ?Register = if (ops.reg2 != .none) ops.reg2 else null;
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .mem = Memory.sib(Memory.PtrSize.fromSize(ops.reg1.size()), .{
+ .base = base,
+ .disp = disp,
+ }) },
+ });
},
0b10 => {
if (ops.reg2 == .none) {
return emit.fail("TODO unused variant: mov reg1, none, 0b10", .{});
}
- // mov [reg1 + imm32], reg2
- // MR
- const imm = emit.mir.instructions.items(.data)[inst].imm;
- return lowerToMrEnc(tag, RegisterOrMemory.mem(Memory.PtrSize.new(ops.reg2.size()), .{
- .disp = imm,
- .base = ops.reg1,
- }), ops.reg2, emit.code);
+ const disp = emit.mir.instructions.items(.data)[inst].disp;
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .mem = Memory.sib(Memory.PtrSize.fromSize(ops.reg2.size()), .{
+ .base = ops.reg1,
+ .disp = disp,
+ }) },
+ .op2 = .{ .reg = ops.reg2 },
+ });
},
0b11 => {
return emit.fail("TODO unused variant: mov reg1, reg2, 0b11", .{});
@@ -578,169 +598,165 @@ fn mirArith(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
}
}
-fn mirArithMemImm(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirArithMemImm(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
assert(ops.reg2 == .none);
const payload = emit.mir.instructions.items(.data)[inst].payload;
const imm_pair = emit.mir.extraData(Mir.ImmPair, payload).data;
const ptr_size: Memory.PtrSize = switch (ops.flags) {
- 0b00 => .byte_ptr,
- 0b01 => .word_ptr,
- 0b10 => .dword_ptr,
- 0b11 => .qword_ptr,
- };
- return lowerToMiEnc(tag, RegisterOrMemory.mem(ptr_size, .{
- .disp = imm_pair.dest_off,
- .base = ops.reg1,
- }), imm_pair.operand, emit.code);
-}
-
-inline fn setRexWRegister(reg: Register) bool {
- if (reg.size() > 64) return false;
- if (reg.size() == 64) return true;
- return switch (reg) {
- .ah, .ch, .dh, .bh => true,
- else => false,
+ 0b00 => .byte,
+ 0b01 => .word,
+ 0b10 => .dword,
+ 0b11 => .qword,
};
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .mem = Memory.sib(ptr_size, .{
+ .disp = imm_pair.dest_off,
+ .base = ops.reg1,
+ }) },
+ .op2 = .{ .imm = imm_pair.operand },
+ });
}
-inline fn immOpSize(u_imm: u32) u6 {
- const imm = @bitCast(i32, u_imm);
- if (math.minInt(i8) <= imm and imm <= math.maxInt(i8)) {
- return 8;
- }
- if (math.minInt(i16) <= imm and imm <= math.maxInt(i16)) {
- return 16;
- }
- return 32;
-}
-
-fn mirArithScaleSrc(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirArithScaleSrc(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
const scale = ops.flags;
const payload = emit.mir.instructions.items(.data)[inst].payload;
const index_reg_disp = emit.mir.extraData(Mir.IndexRegisterDisp, payload).data.decode();
- // OP reg1, [reg2 + scale*index + imm32]
- const scale_index = ScaleIndex{
+ const scale_index = Memory.ScaleIndex{
.scale = scale,
.index = index_reg_disp.index,
};
- return lowerToRmEnc(tag, ops.reg1, RegisterOrMemory.mem(Memory.PtrSize.new(ops.reg1.size()), .{
- .disp = index_reg_disp.disp,
- .base = ops.reg2,
- .scale_index = scale_index,
- }), emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .mem = Memory.sib(Memory.PtrSize.fromSize(ops.reg1.size()), .{
+ .base = ops.reg2,
+ .scale_index = scale_index,
+ .disp = index_reg_disp.disp,
+ }) },
+ });
}
-fn mirArithScaleDst(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirArithScaleDst(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
const scale = ops.flags;
const payload = emit.mir.instructions.items(.data)[inst].payload;
const index_reg_disp = emit.mir.extraData(Mir.IndexRegisterDisp, payload).data.decode();
- const scale_index = ScaleIndex{
+ const scale_index = Memory.ScaleIndex{
.scale = scale,
.index = index_reg_disp.index,
};
assert(ops.reg2 != .none);
- // OP [reg1 + scale*index + imm32], reg2
- return lowerToMrEnc(tag, RegisterOrMemory.mem(Memory.PtrSize.new(ops.reg2.size()), .{
- .disp = index_reg_disp.disp,
- .base = ops.reg1,
- .scale_index = scale_index,
- }), ops.reg2, emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .mem = Memory.sib(Memory.PtrSize.fromSize(ops.reg2.size()), .{
+ .base = ops.reg1,
+ .scale_index = scale_index,
+ .disp = index_reg_disp.disp,
+ }) },
+ .op2 = .{ .reg = ops.reg2 },
+ });
}
-fn mirArithScaleImm(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirArithScaleImm(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
const scale = ops.flags;
const payload = emit.mir.instructions.items(.data)[inst].payload;
const index_reg_disp_imm = emit.mir.extraData(Mir.IndexRegisterDispImm, payload).data.decode();
- const scale_index = ScaleIndex{
+ const scale_index = Memory.ScaleIndex{
.scale = scale,
.index = index_reg_disp_imm.index,
};
- // OP qword ptr [reg1 + scale*index + imm32], imm32
- return lowerToMiEnc(tag, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = index_reg_disp_imm.disp,
- .base = ops.reg1,
- .scale_index = scale_index,
- }), index_reg_disp_imm.imm, emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .mem = Memory.sib(.qword, .{
+ .base = ops.reg1,
+ .disp = index_reg_disp_imm.disp,
+ .scale_index = scale_index,
+ }) },
+ .op2 = .{ .imm = index_reg_disp_imm.imm },
+ });
}
-fn mirArithMemIndexImm(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirArithMemIndexImm(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
assert(ops.reg2 == .none);
const payload = emit.mir.instructions.items(.data)[inst].payload;
const index_reg_disp_imm = emit.mir.extraData(Mir.IndexRegisterDispImm, payload).data.decode();
const ptr_size: Memory.PtrSize = switch (ops.flags) {
- 0b00 => .byte_ptr,
- 0b01 => .word_ptr,
- 0b10 => .dword_ptr,
- 0b11 => .qword_ptr,
+ 0b00 => .byte,
+ 0b01 => .word,
+ 0b10 => .dword,
+ 0b11 => .qword,
};
- const scale_index = ScaleIndex{
+ const scale_index = Memory.ScaleIndex{
.scale = 0,
.index = index_reg_disp_imm.index,
};
- // OP ptr [reg1 + index + imm32], imm32
- return lowerToMiEnc(tag, RegisterOrMemory.mem(ptr_size, .{
- .disp = index_reg_disp_imm.disp,
- .base = ops.reg1,
- .scale_index = scale_index,
- }), index_reg_disp_imm.imm, emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .mem = Memory.sib(ptr_size, .{
+ .disp = index_reg_disp_imm.disp,
+ .base = ops.reg1,
+ .scale_index = scale_index,
+ }) },
+ .op2 = .{ .imm = index_reg_disp_imm.imm },
+ });
}
fn mirMovSignExtend(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
- const mir_tag = emit.mir.instructions.items(.tag)[inst];
- assert(mir_tag == .mov_sign_extend);
+ const tag = emit.mir.instructions.items(.tag)[inst];
+ assert(tag == .mov_sign_extend);
const ops = emit.mir.instructions.items(.ops)[inst].decode();
- const imm = if (ops.flags != 0b00) emit.mir.instructions.items(.data)[inst].imm else undefined;
+ const disp = if (ops.flags != 0b00) emit.mir.instructions.items(.data)[inst].disp else undefined;
switch (ops.flags) {
0b00 => {
- const tag: Tag = if (ops.reg2.size() == 32) .movsxd else .movsx;
- return lowerToRmEnc(tag, ops.reg1, RegisterOrMemory.reg(ops.reg2), emit.code);
- },
- 0b01 => {
- return lowerToRmEnc(.movsx, ops.reg1, RegisterOrMemory.mem(.byte_ptr, .{
- .disp = imm,
- .base = ops.reg2,
- }), emit.code);
- },
- 0b10 => {
- return lowerToRmEnc(.movsx, ops.reg1, RegisterOrMemory.mem(.word_ptr, .{
- .disp = imm,
- .base = ops.reg2,
- }), emit.code);
+ const mnemonic: Instruction.Mnemonic = if (ops.reg2.size() == 32) .movsxd else .movsx;
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .reg = ops.reg2 },
+ });
},
- 0b11 => {
- return lowerToRmEnc(.movsxd, ops.reg1, RegisterOrMemory.mem(.dword_ptr, .{
- .disp = imm,
- .base = ops.reg2,
- }), emit.code);
+ else => {
+ const ptr_size: Memory.PtrSize = switch (ops.flags) {
+ 0b01 => .byte,
+ 0b10 => .word,
+ 0b11 => .qword,
+ else => unreachable,
+ };
+ return emit.encode(.movsx, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .mem = Memory.sib(ptr_size, .{
+ .disp = disp,
+ .base = ops.reg2,
+ }) },
+ });
},
}
}
fn mirMovZeroExtend(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
- const mir_tag = emit.mir.instructions.items(.tag)[inst];
- assert(mir_tag == .mov_zero_extend);
+ const tag = emit.mir.instructions.items(.tag)[inst];
+ assert(tag == .mov_zero_extend);
const ops = emit.mir.instructions.items(.ops)[inst].decode();
- const imm = if (ops.flags != 0b00) emit.mir.instructions.items(.data)[inst].imm else undefined;
+ const disp = if (ops.flags != 0b00) emit.mir.instructions.items(.data)[inst].disp else undefined;
switch (ops.flags) {
0b00 => {
- return lowerToRmEnc(.movzx, ops.reg1, RegisterOrMemory.reg(ops.reg2), emit.code);
- },
- 0b01 => {
- return lowerToRmEnc(.movzx, ops.reg1, RegisterOrMemory.mem(.byte_ptr, .{
- .disp = imm,
- .base = ops.reg2,
- }), emit.code);
+ return emit.encode(.movzx, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .reg = ops.reg2 },
+ });
},
- 0b10 => {
- return lowerToRmEnc(.movzx, ops.reg1, RegisterOrMemory.mem(.word_ptr, .{
- .disp = imm,
- .base = ops.reg2,
- }), emit.code);
+ 0b01, 0b10 => {
+ const ptr_size: Memory.PtrSize = switch (ops.flags) {
+ 0b01 => .byte,
+ 0b10 => .word,
+ else => unreachable,
+ };
+ return emit.encode(.movzx, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .mem = Memory.sib(ptr_size, .{
+ .disp = disp,
+ .base = ops.reg2,
+ }) },
+ });
},
0b11 => {
return emit.fail("TODO unused variant: movzx 0b11", .{});
@@ -759,9 +775,10 @@ fn mirMovabs(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
const imm = emit.mir.extraData(Mir.Imm64, payload).data;
break :blk imm.decode();
} else emit.mir.instructions.items(.data)[inst].imm;
- // movabs reg, imm64
- // OI
- return lowerToOiEnc(.mov, ops.reg1, imm, emit.code);
+ return emit.encode(.mov, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .imm = @bitCast(i64, imm) },
+ });
},
0b01 => {
if (ops.reg1 == .none) {
@@ -770,18 +787,20 @@ fn mirMovabs(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
const imm = emit.mir.extraData(Mir.Imm64, payload).data;
break :blk imm.decode();
} else emit.mir.instructions.items(.data)[inst].imm;
- // movabs moffs64, rax
- // TD
- return lowerToTdEnc(.mov, imm, ops.reg2, emit.code);
+ return emit.encode(.mov, .{
+ .op1 = .{ .mem = Memory.moffs(ops.reg2, imm) },
+ .op2 = .{ .reg = .rax },
+ });
}
const imm: u64 = if (ops.reg1.size() == 64) blk: {
const payload = emit.mir.instructions.items(.data)[inst].payload;
const imm = emit.mir.extraData(Mir.Imm64, payload).data;
break :blk imm.decode();
} else emit.mir.instructions.items(.data)[inst].imm;
- // movabs rax, moffs64
- // FD
- return lowerToFdEnc(.mov, ops.reg1, imm, emit.code);
+ return emit.encode(.mov, .{
+ .op1 = .{ .reg = .rax },
+ .op2 = .{ .mem = Memory.moffs(ops.reg1, imm) },
+ });
},
else => return emit.fail("TODO unused movabs variant", .{}),
}
@@ -791,63 +810,58 @@ fn mirFisttp(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
const tag = emit.mir.instructions.items(.tag)[inst];
assert(tag == .fisttp);
const ops = emit.mir.instructions.items(.ops)[inst].decode();
-
- // the selecting between operand sizes for this particular `fisttp` instruction
- // is done via opcode instead of the usual prefixes.
-
- const opcode: Tag = switch (ops.flags) {
- 0b00 => .fisttp16,
- 0b01 => .fisttp32,
- 0b10 => .fisttp64,
+ const ptr_size: Memory.PtrSize = switch (ops.flags) {
+ 0b00 => .word,
+ 0b01 => .dword,
+ 0b10 => .qword,
else => unreachable,
};
- const mem_or_reg = Memory{
- .base = ops.reg1,
- .disp = emit.mir.instructions.items(.data)[inst].imm,
- .ptr_size = Memory.PtrSize.dword_ptr, // to prevent any prefix from being used
- };
- return lowerToMEnc(opcode, .{ .memory = mem_or_reg }, emit.code);
+ return emit.encode(.fisttp, .{
+ .op1 = .{ .mem = Memory.sib(ptr_size, .{
+ .base = ops.reg1,
+ .disp = emit.mir.instructions.items(.data)[inst].disp,
+ }) },
+ });
}
fn mirFld(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
const tag = emit.mir.instructions.items(.tag)[inst];
assert(tag == .fld);
const ops = emit.mir.instructions.items(.ops)[inst].decode();
-
- // the selecting between operand sizes for this particular `fisttp` instruction
- // is done via opcode instead of the usual prefixes.
-
- const opcode: Tag = switch (ops.flags) {
- 0b01 => .fld32,
- 0b10 => .fld64,
+ const ptr_size: Memory.PtrSize = switch (ops.flags) {
+ 0b01 => .dword,
+ 0b10 => .qword,
else => unreachable,
};
- const mem_or_reg = Memory{
- .base = ops.reg1,
- .disp = emit.mir.instructions.items(.data)[inst].imm,
- .ptr_size = Memory.PtrSize.dword_ptr, // to prevent any prefix from being used
- };
- return lowerToMEnc(opcode, .{ .memory = mem_or_reg }, emit.code);
+ return emit.encode(.fld, .{
+ .op1 = .{ .mem = Memory.sib(ptr_size, .{
+ .base = ops.reg1,
+ .disp = emit.mir.instructions.items(.data)[inst].disp,
+ }) },
+ });
}
-fn mirShift(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirShift(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
switch (ops.flags) {
0b00 => {
- // sal reg1, 1
- // M1
- return lowerToM1Enc(tag, RegisterOrMemory.reg(ops.reg1), emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .imm = 1 },
+ });
},
0b01 => {
- // sal reg1, .cl
- // MC
- return lowerToMcEnc(tag, RegisterOrMemory.reg(ops.reg1), emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .reg = .cl },
+ });
},
0b10 => {
- // sal reg1, imm8
- // MI
const imm = @truncate(u8, emit.mir.instructions.items(.data)[inst].imm);
- return lowerToMiImm8Enc(tag, RegisterOrMemory.reg(ops.reg1), imm, emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .imm = imm },
+ });
},
0b11 => {
return emit.fail("TODO unused variant: SHIFT reg1, 0b11", .{});
@@ -855,24 +869,28 @@ fn mirShift(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
}
}
-fn mirMulDiv(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirMulDiv(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
if (ops.reg1 != .none) {
assert(ops.reg2 == .none);
- return lowerToMEnc(tag, RegisterOrMemory.reg(ops.reg1), emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ });
}
assert(ops.reg2 != .none);
- const imm = emit.mir.instructions.items(.data)[inst].imm;
+ const disp = emit.mir.instructions.items(.data)[inst].disp;
const ptr_size: Memory.PtrSize = switch (ops.flags) {
- 0b00 => .byte_ptr,
- 0b01 => .word_ptr,
- 0b10 => .dword_ptr,
- 0b11 => .qword_ptr,
+ 0b00 => .byte,
+ 0b01 => .word,
+ 0b10 => .dword,
+ 0b11 => .qword,
};
- return lowerToMEnc(tag, RegisterOrMemory.mem(ptr_size, .{
- .disp = imm,
- .base = ops.reg2,
- }), emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .mem = Memory.sib(ptr_size, .{
+ .base = ops.reg2,
+ .disp = disp,
+ }) },
+ });
}
fn mirIMulComplex(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
@@ -881,40 +899,54 @@ fn mirIMulComplex(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
switch (ops.flags) {
0b00 => {
- return lowerToRmEnc(.imul, ops.reg1, RegisterOrMemory.reg(ops.reg2), emit.code);
+ return emit.encode(.imul, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .reg = ops.reg2 },
+ });
},
0b01 => {
- const imm = emit.mir.instructions.items(.data)[inst].imm;
+ const disp = emit.mir.instructions.items(.data)[inst].disp;
const src_reg: ?Register = if (ops.reg2 != .none) ops.reg2 else null;
- return lowerToRmEnc(.imul, ops.reg1, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = imm,
- .base = src_reg,
- }), emit.code);
+ return emit.encode(.imul, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .mem = Memory.sib(.qword, .{
+ .base = src_reg,
+ .disp = disp,
+ }) },
+ });
},
0b10 => {
const imm = emit.mir.instructions.items(.data)[inst].imm;
- return lowerToRmiEnc(.imul, ops.reg1, RegisterOrMemory.reg(ops.reg2), imm, emit.code);
+ return emit.encode(.imul, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .reg = ops.reg2 },
+ .op3 = .{ .imm = imm },
+ });
},
0b11 => {
const payload = emit.mir.instructions.items(.data)[inst].payload;
const imm_pair = emit.mir.extraData(Mir.ImmPair, payload).data;
- return lowerToRmiEnc(.imul, ops.reg1, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = imm_pair.dest_off,
- .base = ops.reg2,
- }), imm_pair.operand, emit.code);
+ return emit.encode(.imul, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .mem = Memory.sib(.qword, .{
+ .base = ops.reg2,
+ .disp = imm_pair.dest_off,
+ }) },
+ .op3 = .{ .imm = imm_pair.operand },
+ });
},
}
}
fn mirCwd(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
- const tag: Tag = switch (ops.flags) {
+ const mnemonic: Instruction.Mnemonic = switch (ops.flags) {
0b00 => .cbw,
0b01 => .cwd,
0b10 => .cdq,
0b11 => .cqo,
};
- return lowerToZoEnc(tag, emit.code);
+ return emit.encode(mnemonic, .{});
}
fn mirLea(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
@@ -923,30 +955,22 @@ fn mirLea(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
switch (ops.flags) {
0b00 => {
- // lea reg1, [reg2 + imm32]
- // RM
- const imm = emit.mir.instructions.items(.data)[inst].imm;
+ const disp = emit.mir.instructions.items(.data)[inst].disp;
const src_reg: ?Register = if (ops.reg2 != .none) ops.reg2 else null;
- return lowerToRmEnc(
- .lea,
- ops.reg1,
- RegisterOrMemory.mem(Memory.PtrSize.new(ops.reg1.size()), .{
- .disp = imm,
+ return emit.encode(.lea, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .mem = Memory.sib(Memory.PtrSize.fromSize(ops.reg1.size()), .{
.base = src_reg,
- }),
- emit.code,
- );
+ .disp = disp,
+ }) },
+ });
},
0b01 => {
- // lea reg1, [rip + imm32]
- // RM
const start_offset = emit.code.items.len;
- try lowerToRmEnc(
- .lea,
- ops.reg1,
- RegisterOrMemory.rip(Memory.PtrSize.new(ops.reg1.size()), 0),
- emit.code,
- );
+ try emit.encode(.lea, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .mem = Memory.rip(Memory.PtrSize.fromSize(ops.reg1.size()), 0) },
+ });
const end_offset = emit.code.items.len;
// Backpatch the displacement
const payload = emit.mir.instructions.items(.data)[inst].payload;
@@ -955,24 +979,21 @@ fn mirLea(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
mem.writeIntLittle(i32, emit.code.items[end_offset - 4 ..][0..4], disp);
},
0b10 => {
- // lea reg, [rbp + index + imm32]
const payload = emit.mir.instructions.items(.data)[inst].payload;
const index_reg_disp = emit.mir.extraData(Mir.IndexRegisterDisp, payload).data.decode();
const src_reg: ?Register = if (ops.reg2 != .none) ops.reg2 else null;
- const scale_index = ScaleIndex{
+ const scale_index = Memory.ScaleIndex{
.scale = 0,
.index = index_reg_disp.index,
};
- return lowerToRmEnc(
- .lea,
- ops.reg1,
- RegisterOrMemory.mem(Memory.PtrSize.new(ops.reg1.size()), .{
- .disp = index_reg_disp.disp,
+ return emit.encode(.lea, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .mem = Memory.sib(Memory.PtrSize.fromSize(ops.reg1.size()), .{
.base = src_reg,
.scale_index = scale_index,
- }),
- emit.code,
- );
+ .disp = index_reg_disp.disp,
+ }) },
+ });
},
0b11 => return emit.fail("TODO unused LEA variant 0b11", .{}),
}
@@ -989,14 +1010,10 @@ fn mirLeaPic(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
else => return emit.fail("TODO unused LEA PIC variant 0b11", .{}),
}
- // lea reg1, [rip + reloc]
- // RM
- try lowerToRmEnc(
- .lea,
- ops.reg1,
- RegisterOrMemory.rip(Memory.PtrSize.new(ops.reg1.size()), 0),
- emit.code,
- );
+ try emit.encode(.lea, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .mem = Memory.rip(Memory.PtrSize.fromSize(ops.reg1.size()), 0) },
+ });
const end_offset = emit.code.items.len;
@@ -1039,94 +1056,64 @@ fn mirLeaPic(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
}
}
-// SSE instructions
-
-fn mirMovFloatSse(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
- const ops = emit.mir.instructions.items(.ops)[inst].decode();
- switch (ops.flags) {
- 0b00 => {
- const imm = emit.mir.instructions.items(.data)[inst].imm;
- return lowerToRmEnc(tag, ops.reg1, RegisterOrMemory.mem(Memory.PtrSize.new(ops.reg2.size()), .{
- .disp = imm,
- .base = ops.reg2,
- }), emit.code);
- },
- 0b01 => {
- const imm = emit.mir.instructions.items(.data)[inst].imm;
- return lowerToMrEnc(tag, RegisterOrMemory.mem(Memory.PtrSize.new(ops.reg1.size()), .{
- .disp = imm,
- .base = ops.reg1,
- }), ops.reg2, emit.code);
- },
- 0b10 => {
- return lowerToRmEnc(tag, ops.reg1, RegisterOrMemory.reg(ops.reg2), emit.code);
- },
- else => return emit.fail("TODO unused variant 0b{b} for {}", .{ ops.flags, tag }),
- }
-}
-
-fn mirAddFloatSse(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
- const ops = emit.mir.instructions.items(.ops)[inst].decode();
- switch (ops.flags) {
- 0b00 => {
- return lowerToRmEnc(tag, ops.reg1, RegisterOrMemory.reg(ops.reg2), emit.code);
- },
- else => return emit.fail("TODO unused variant 0b{b} for {}", .{ ops.flags, tag }),
- }
-}
-
-fn mirCmpFloatSse(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
- const ops = emit.mir.instructions.items(.ops)[inst].decode();
- switch (ops.flags) {
- 0b00 => {
- return lowerToRmEnc(tag, ops.reg1, RegisterOrMemory.reg(ops.reg2), emit.code);
- },
- else => return emit.fail("TODO unused variant 0b{b} for {}", .{ ops.flags, tag }),
- }
-}
-// AVX instructions
+// SSE/AVX instructions
-fn mirMovFloatAvx(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirMovFloat(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
switch (ops.flags) {
0b00 => {
- const imm = emit.mir.instructions.items(.data)[inst].imm;
- return lowerToVmEnc(tag, ops.reg1, RegisterOrMemory.mem(Memory.PtrSize.new(ops.reg2.size()), .{
- .disp = imm,
- .base = ops.reg2,
- }), emit.code);
+ const disp = emit.mir.instructions.items(.data)[inst].disp;
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .mem = Memory.sib(Memory.PtrSize.fromSize(ops.reg2.size()), .{
+ .base = ops.reg2,
+ .disp = disp,
+ }) },
+ });
},
0b01 => {
- const imm = emit.mir.instructions.items(.data)[inst].imm;
- return lowerToMvEnc(tag, RegisterOrMemory.mem(Memory.PtrSize.new(ops.reg1.size()), .{
- .disp = imm,
- .base = ops.reg1,
- }), ops.reg2, emit.code);
+ const disp = emit.mir.instructions.items(.data)[inst].disp;
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .mem = Memory.sib(Memory.PtrSize.fromSize(ops.reg1.size()), .{
+ .base = ops.reg1,
+ .disp = disp,
+ }) },
+ .op2 = .{ .reg = ops.reg2 },
+ });
},
0b10 => {
- return lowerToRvmEnc(tag, ops.reg1, ops.reg1, RegisterOrMemory.reg(ops.reg2), emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .reg = ops.reg2 },
+ });
},
- else => return emit.fail("TODO unused variant 0b{b} for {}", .{ ops.flags, tag }),
+ else => return emit.fail("TODO unused variant 0b{b} for {}", .{ ops.flags, mnemonic }),
}
}
-fn mirAddFloatAvx(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirAddFloat(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
switch (ops.flags) {
0b00 => {
- return lowerToRvmEnc(tag, ops.reg1, ops.reg1, RegisterOrMemory.reg(ops.reg2), emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .reg = ops.reg2 },
+ });
},
- else => return emit.fail("TODO unused variant 0b{b} for {}", .{ ops.flags, tag }),
+ else => return emit.fail("TODO unused variant 0b{b} for {}", .{ ops.flags, mnemonic }),
}
}
-fn mirCmpFloatAvx(emit: *Emit, tag: Tag, inst: Mir.Inst.Index) InnerError!void {
+fn mirCmpFloat(emit: *Emit, mnemonic: Instruction.Mnemonic, inst: Mir.Inst.Index) InnerError!void {
const ops = emit.mir.instructions.items(.ops)[inst].decode();
switch (ops.flags) {
0b00 => {
- return lowerToVmEnc(tag, ops.reg1, RegisterOrMemory.reg(ops.reg2), emit.code);
+ return emit.encode(mnemonic, .{
+ .op1 = .{ .reg = ops.reg1 },
+ .op2 = .{ .reg = ops.reg2 },
+ });
},
- else => return emit.fail("TODO unused variant 0b{b} for mov_f64", .{ops.flags}),
+ else => return emit.fail("TODO unused variant 0b{b} for {}", .{ ops.flags, mnemonic }),
}
}
@@ -1139,7 +1126,9 @@ fn mirCallExtern(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
const offset = blk: {
// callq
- try lowerToDEnc(.call_near, 0, emit.code);
+ try emit.encode(.call, .{
+ .op1 = .{ .imm = 0 },
+ });
break :blk @intCast(u32, emit.code.items.len) - 4;
};
@@ -1264,1841 +1253,3 @@ fn mirDbgEpilogueBegin(emit: *Emit, inst: Mir.Inst.Index) InnerError!void {
.none => {},
}
}
-
-const Tag = enum {
- adc,
- add,
- sub,
- xor,
- @"and",
- @"or",
- sbb,
- cmp,
- mov,
- movsx,
- movsxd,
- movzx,
- lea,
- jmp_near,
- call_near,
- push,
- pop,
- @"test",
- ud2,
- int3,
- nop,
- imul,
- mul,
- idiv,
- div,
- syscall,
- ret_near,
- ret_far,
- fisttp16,
- fisttp32,
- fisttp64,
- fld32,
- fld64,
- jo,
- jno,
- jb,
- jbe,
- jc,
- jnae,
- jnc,
- jae,
- je,
- jz,
- jne,
- jnz,
- jna,
- jnb,
- jnbe,
- ja,
- js,
- jns,
- jpe,
- jp,
- jpo,
- jnp,
- jnge,
- jl,
- jge,
- jnl,
- jle,
- jng,
- jg,
- jnle,
- seto,
- setno,
- setb,
- setc,
- setnae,
- setnb,
- setnc,
- setae,
- sete,
- setz,
- setne,
- setnz,
- setbe,
- setna,
- seta,
- setnbe,
- sets,
- setns,
- setp,
- setpe,
- setnp,
- setpo,
- setl,
- setnge,
- setnl,
- setge,
- setle,
- setng,
- setnle,
- setg,
- cmovo,
- cmovno,
- cmovb,
- cmovc,
- cmovnae,
- cmovnb,
- cmovnc,
- cmovae,
- cmove,
- cmovz,
- cmovne,
- cmovnz,
- cmovbe,
- cmovna,
- cmova,
- cmovnbe,
- cmovs,
- cmovns,
- cmovp,
- cmovpe,
- cmovnp,
- cmovpo,
- cmovl,
- cmovnge,
- cmovnl,
- cmovge,
- cmovle,
- cmovng,
- cmovnle,
- cmovg,
- shl,
- sal,
- shr,
- sar,
- cbw,
- cwd,
- cdq,
- cqo,
- movsd,
- movss,
- addsd,
- addss,
- cmpsd,
- cmpss,
- ucomisd,
- ucomiss,
- vmovsd,
- vmovss,
- vaddsd,
- vaddss,
- vcmpsd,
- vcmpss,
- vucomisd,
- vucomiss,
-
- fn isSse(tag: Tag) bool {
- return switch (tag) {
- .movsd,
- .movss,
- .addsd,
- .addss,
- .cmpsd,
- .cmpss,
- .ucomisd,
- .ucomiss,
- => true,
-
- else => false,
- };
- }
-
- fn isAvx(tag: Tag) bool {
- return switch (tag) {
- .vmovsd,
- .vmovss,
- .vaddsd,
- .vaddss,
- .vcmpsd,
- .vcmpss,
- .vucomisd,
- .vucomiss,
- => true,
-
- else => false,
- };
- }
-
- fn isSetCC(tag: Tag) bool {
- return switch (tag) {
- .seto,
- .setno,
- .setb,
- .setc,
- .setnae,
- .setnb,
- .setnc,
- .setae,
- .sete,
- .setz,
- .setne,
- .setnz,
- .setbe,
- .setna,
- .seta,
- .setnbe,
- .sets,
- .setns,
- .setp,
- .setpe,
- .setnp,
- .setpo,
- .setl,
- .setnge,
- .setnl,
- .setge,
- .setle,
- .setng,
- .setnle,
- .setg,
- => true,
- else => false,
- };
- }
-};
-
-const Encoding = enum {
- /// OP
- zo,
-
- /// OP rel32
- d,
-
- /// OP r/m64
- m,
-
- /// OP r64
- o,
-
- /// OP imm32
- i,
-
- /// OP r/m64, 1
- m1,
-
- /// OP r/m64, .cl
- mc,
-
- /// OP r/m64, imm32
- mi,
-
- /// OP r/m64, imm8
- mi8,
-
- /// OP r/m64, r64
- mr,
-
- /// OP r64, r/m64
- rm,
-
- /// OP r64, imm64
- oi,
-
- /// OP al/ax/eax/rax, moffs
- fd,
-
- /// OP moffs, al/ax/eax/rax
- td,
-
- /// OP r64, r/m64, imm32
- rmi,
-
- /// OP xmm1, xmm2/m64
- vm,
-
- /// OP m64, xmm1
- mv,
-
- /// OP xmm1, xmm2, xmm3/m64
- rvm,
-
- /// OP xmm1, xmm2, xmm3/m64, imm8
- rvmi,
-};
-
-const OpCode = struct {
- bytes: [3]u8,
- count: usize,
-
- fn init(comptime in_bytes: []const u8) OpCode {
- comptime assert(in_bytes.len <= 3);
- comptime var bytes: [3]u8 = undefined;
- inline for (in_bytes, 0..) |x, i| {
- bytes[i] = x;
- }
- return .{ .bytes = bytes, .count = in_bytes.len };
- }
-
- fn encode(opc: OpCode, encoder: Encoder) void {
- switch (opc.count) {
- 1 => encoder.opcode_1byte(opc.bytes[0]),
- 2 => encoder.opcode_2byte(opc.bytes[0], opc.bytes[1]),
- 3 => encoder.opcode_3byte(opc.bytes[0], opc.bytes[1], opc.bytes[2]),
- else => unreachable,
- }
- }
-
- fn encodeWithReg(opc: OpCode, encoder: Encoder, reg: Register) void {
- assert(opc.count == 1);
- encoder.opcode_withReg(opc.bytes[0], reg.lowEnc());
- }
-};
-
-inline fn getOpCode(tag: Tag, enc: Encoding, is_one_byte: bool) OpCode {
- // zig fmt: off
- switch (enc) {
- .zo => return switch (tag) {
- .ret_near => OpCode.init(&.{0xc3}),
- .ret_far => OpCode.init(&.{0xcb}),
- .ud2 => OpCode.init(&.{ 0x0F, 0x0B }),
- .int3 => OpCode.init(&.{0xcc}),
- .nop => OpCode.init(&.{0x90}),
- .syscall => OpCode.init(&.{ 0x0f, 0x05 }),
- .cbw => OpCode.init(&.{0x98}),
- .cwd,
- .cdq,
- .cqo => OpCode.init(&.{0x99}),
- else => unreachable,
- },
- .d => return switch (tag) {
- .jmp_near => OpCode.init(&.{0xe9}),
- .call_near => OpCode.init(&.{0xe8}),
-
- .jo => if (is_one_byte) OpCode.init(&.{0x70}) else OpCode.init(&.{0x0f,0x80}),
-
- .jno => if (is_one_byte) OpCode.init(&.{0x71}) else OpCode.init(&.{0x0f,0x81}),
-
- .jb,
- .jc,
- .jnae => if (is_one_byte) OpCode.init(&.{0x72}) else OpCode.init(&.{0x0f,0x82}),
-
- .jnb,
- .jnc,
- .jae => if (is_one_byte) OpCode.init(&.{0x73}) else OpCode.init(&.{0x0f,0x83}),
-
- .je,
- .jz => if (is_one_byte) OpCode.init(&.{0x74}) else OpCode.init(&.{0x0f,0x84}),
-
- .jne,
- .jnz => if (is_one_byte) OpCode.init(&.{0x75}) else OpCode.init(&.{0x0f,0x85}),
-
- .jna,
- .jbe => if (is_one_byte) OpCode.init(&.{0x76}) else OpCode.init(&.{0x0f,0x86}),
-
- .jnbe,
- .ja => if (is_one_byte) OpCode.init(&.{0x77}) else OpCode.init(&.{0x0f,0x87}),
-
- .js => if (is_one_byte) OpCode.init(&.{0x78}) else OpCode.init(&.{0x0f,0x88}),
-
- .jns => if (is_one_byte) OpCode.init(&.{0x79}) else OpCode.init(&.{0x0f,0x89}),
-
- .jpe,
- .jp => if (is_one_byte) OpCode.init(&.{0x7a}) else OpCode.init(&.{0x0f,0x8a}),
-
- .jpo,
- .jnp => if (is_one_byte) OpCode.init(&.{0x7b}) else OpCode.init(&.{0x0f,0x8b}),
-
- .jnge,
- .jl => if (is_one_byte) OpCode.init(&.{0x7c}) else OpCode.init(&.{0x0f,0x8c}),
-
- .jge,
- .jnl => if (is_one_byte) OpCode.init(&.{0x7d}) else OpCode.init(&.{0x0f,0x8d}),
-
- .jle,
- .jng => if (is_one_byte) OpCode.init(&.{0x7e}) else OpCode.init(&.{0x0f,0x8e}),
-
- .jg,
- .jnle => if (is_one_byte) OpCode.init(&.{0x7f}) else OpCode.init(&.{0x0f,0x8f}),
-
- else => unreachable,
- },
- .m => return switch (tag) {
- .jmp_near,
- .call_near,
- .push => OpCode.init(&.{0xff}),
-
- .pop => OpCode.init(&.{0x8f}),
- .seto => OpCode.init(&.{0x0f,0x90}),
- .setno => OpCode.init(&.{0x0f,0x91}),
-
- .setb,
- .setc,
- .setnae => OpCode.init(&.{0x0f,0x92}),
-
- .setnb,
- .setnc,
- .setae => OpCode.init(&.{0x0f,0x93}),
-
- .sete,
- .setz => OpCode.init(&.{0x0f,0x94}),
-
- .setne,
- .setnz => OpCode.init(&.{0x0f,0x95}),
-
- .setbe,
- .setna => OpCode.init(&.{0x0f,0x96}),
-
- .seta,
- .setnbe => OpCode.init(&.{0x0f,0x97}),
-
- .sets => OpCode.init(&.{0x0f,0x98}),
- .setns => OpCode.init(&.{0x0f,0x99}),
-
- .setp,
- .setpe => OpCode.init(&.{0x0f,0x9a}),
-
- .setnp,
- .setpo => OpCode.init(&.{0x0f,0x9b}),
-
- .setl,
- .setnge => OpCode.init(&.{0x0f,0x9c}),
-
- .setnl,
- .setge => OpCode.init(&.{0x0f,0x9d}),
-
- .setle,
- .setng => OpCode.init(&.{0x0f,0x9e}),
-
- .setnle,
- .setg => OpCode.init(&.{0x0f,0x9f}),
-
- .idiv,
- .div,
- .imul,
- .mul => if (is_one_byte) OpCode.init(&.{0xf6}) else OpCode.init(&.{0xf7}),
-
- .fisttp16 => OpCode.init(&.{0xdf}),
- .fisttp32 => OpCode.init(&.{0xdb}),
- .fisttp64 => OpCode.init(&.{0xdd}),
- .fld32 => OpCode.init(&.{0xd9}),
- .fld64 => OpCode.init(&.{0xdd}),
- else => unreachable,
- },
- .o => return switch (tag) {
- .push => OpCode.init(&.{0x50}),
- .pop => OpCode.init(&.{0x58}),
- else => unreachable,
- },
- .i => return switch (tag) {
- .push => if (is_one_byte) OpCode.init(&.{0x6a}) else OpCode.init(&.{0x68}),
- .@"test" => if (is_one_byte) OpCode.init(&.{0xa8}) else OpCode.init(&.{0xa9}),
- .ret_near => OpCode.init(&.{0xc2}),
- .ret_far => OpCode.init(&.{0xca}),
- else => unreachable,
- },
- .m1 => return switch (tag) {
- .shl, .sal,
- .shr, .sar => if (is_one_byte) OpCode.init(&.{0xd0}) else OpCode.init(&.{0xd1}),
- else => unreachable,
- },
- .mc => return switch (tag) {
- .shl, .sal,
- .shr, .sar => if (is_one_byte) OpCode.init(&.{0xd2}) else OpCode.init(&.{0xd3}),
- else => unreachable,
- },
- .mi => return switch (tag) {
- .adc, .add,
- .sub, .xor,
- .@"and", .@"or",
- .sbb, .cmp => if (is_one_byte) OpCode.init(&.{0x80}) else OpCode.init(&.{0x81}),
- .mov => if (is_one_byte) OpCode.init(&.{0xc6}) else OpCode.init(&.{0xc7}),
- .@"test" => if (is_one_byte) OpCode.init(&.{0xf6}) else OpCode.init(&.{0xf7}),
- else => unreachable,
- },
- .mi8 => return switch (tag) {
- .adc, .add,
- .sub, .xor,
- .@"and", .@"or",
- .sbb, .cmp => OpCode.init(&.{0x83}),
- .shl, .sal,
- .shr, .sar => if (is_one_byte) OpCode.init(&.{0xc0}) else OpCode.init(&.{0xc1}),
- else => unreachable,
- },
- .mr => return switch (tag) {
- .adc => if (is_one_byte) OpCode.init(&.{0x10}) else OpCode.init(&.{0x11}),
- .add => if (is_one_byte) OpCode.init(&.{0x00}) else OpCode.init(&.{0x01}),
- .sub => if (is_one_byte) OpCode.init(&.{0x28}) else OpCode.init(&.{0x29}),
- .xor => if (is_one_byte) OpCode.init(&.{0x30}) else OpCode.init(&.{0x31}),
- .@"and" => if (is_one_byte) OpCode.init(&.{0x20}) else OpCode.init(&.{0x21}),
- .@"or" => if (is_one_byte) OpCode.init(&.{0x08}) else OpCode.init(&.{0x09}),
- .sbb => if (is_one_byte) OpCode.init(&.{0x18}) else OpCode.init(&.{0x19}),
- .cmp => if (is_one_byte) OpCode.init(&.{0x38}) else OpCode.init(&.{0x39}),
- .mov => if (is_one_byte) OpCode.init(&.{0x88}) else OpCode.init(&.{0x89}),
- .@"test" => if (is_one_byte) OpCode.init(&.{0x84}) else OpCode.init(&.{0x85}),
- .movsd => OpCode.init(&.{0xf2,0x0f,0x11}),
- .movss => OpCode.init(&.{0xf3,0x0f,0x11}),
- else => unreachable,
- },
- .rm => return switch (tag) {
- .adc => if (is_one_byte) OpCode.init(&.{0x12}) else OpCode.init(&.{0x13}),
- .add => if (is_one_byte) OpCode.init(&.{0x02}) else OpCode.init(&.{0x03}),
- .sub => if (is_one_byte) OpCode.init(&.{0x2a}) else OpCode.init(&.{0x2b}),
- .xor => if (is_one_byte) OpCode.init(&.{0x32}) else OpCode.init(&.{0x33}),
- .@"and" => if (is_one_byte) OpCode.init(&.{0x22}) else OpCode.init(&.{0x23}),
- .@"or" => if (is_one_byte) OpCode.init(&.{0x0a}) else OpCode.init(&.{0x0b}),
- .sbb => if (is_one_byte) OpCode.init(&.{0x1a}) else OpCode.init(&.{0x1b}),
- .cmp => if (is_one_byte) OpCode.init(&.{0x3a}) else OpCode.init(&.{0x3b}),
- .mov => if (is_one_byte) OpCode.init(&.{0x8a}) else OpCode.init(&.{0x8b}),
- .movsx => if (is_one_byte) OpCode.init(&.{0x0f,0xbe}) else OpCode.init(&.{0x0f,0xbf}),
- .movsxd => OpCode.init(&.{0x63}),
- .movzx => if (is_one_byte) OpCode.init(&.{0x0f,0xb6}) else OpCode.init(&.{0x0f,0xb7}),
- .lea => if (is_one_byte) OpCode.init(&.{0x8c}) else OpCode.init(&.{0x8d}),
- .imul => OpCode.init(&.{0x0f,0xaf}),
-
- .cmova,
- .cmovnbe, => OpCode.init(&.{0x0f,0x47}),
-
- .cmovae,
- .cmovnb, => OpCode.init(&.{0x0f,0x43}),
-
- .cmovb,
- .cmovc,
- .cmovnae => OpCode.init(&.{0x0f,0x42}),
-
- .cmovbe,
- .cmovna, => OpCode.init(&.{0x0f,0x46}),
-
- .cmove,
- .cmovz, => OpCode.init(&.{0x0f,0x44}),
-
- .cmovg,
- .cmovnle, => OpCode.init(&.{0x0f,0x4f}),
-
- .cmovge,
- .cmovnl, => OpCode.init(&.{0x0f,0x4d}),
-
- .cmovl,
- .cmovnge, => OpCode.init(&.{0x0f,0x4c}),
-
- .cmovle,
- .cmovng, => OpCode.init(&.{0x0f,0x4e}),
-
- .cmovne,
- .cmovnz, => OpCode.init(&.{0x0f,0x45}),
-
- .cmovno => OpCode.init(&.{0x0f,0x41}),
-
- .cmovnp,
- .cmovpo, => OpCode.init(&.{0x0f,0x4b}),
-
- .cmovns => OpCode.init(&.{0x0f,0x49}),
-
- .cmovo => OpCode.init(&.{0x0f,0x40}),
-
- .cmovp,
- .cmovpe, => OpCode.init(&.{0x0f,0x4a}),
-
- .cmovs => OpCode.init(&.{0x0f,0x48}),
-
- .movsd => OpCode.init(&.{0xf2,0x0f,0x10}),
- .movss => OpCode.init(&.{0xf3,0x0f,0x10}),
- .addsd => OpCode.init(&.{0xf2,0x0f,0x58}),
- .addss => OpCode.init(&.{0xf3,0x0f,0x58}),
- .ucomisd => OpCode.init(&.{0x66,0x0f,0x2e}),
- .ucomiss => OpCode.init(&.{0x0f,0x2e}),
- else => unreachable,
- },
- .oi => return switch (tag) {
- .mov => if (is_one_byte) OpCode.init(&.{0xb0}) else OpCode.init(&.{0xb8}),
- else => unreachable,
- },
- .fd => return switch (tag) {
- .mov => if (is_one_byte) OpCode.init(&.{0xa0}) else OpCode.init(&.{0xa1}),
- else => unreachable,
- },
- .td => return switch (tag) {
- .mov => if (is_one_byte) OpCode.init(&.{0xa2}) else OpCode.init(&.{0xa3}),
- else => unreachable,
- },
- .rmi => return switch (tag) {
- .imul => if (is_one_byte) OpCode.init(&.{0x6b}) else OpCode.init(&.{0x69}),
- else => unreachable,
- },
- .mv => return switch (tag) {
- .vmovsd,
- .vmovss => OpCode.init(&.{0x11}),
- else => unreachable,
- },
- .vm => return switch (tag) {
- .vmovsd,
- .vmovss => OpCode.init(&.{0x10}),
- .vucomisd,
- .vucomiss => OpCode.init(&.{0x2e}),
- else => unreachable,
- },
- .rvm => return switch (tag) {
- .vaddsd,
- .vaddss => OpCode.init(&.{0x58}),
- .vmovsd,
- .vmovss => OpCode.init(&.{0x10}),
- else => unreachable,
- },
- .rvmi => return switch (tag) {
- .vcmpsd,
- .vcmpss => OpCode.init(&.{0xc2}),
- else => unreachable,
- },
- }
- // zig fmt: on
-}
-
-inline fn getModRmExt(tag: Tag) u3 {
- return switch (tag) {
- .adc => 0x2,
- .add => 0x0,
- .sub => 0x5,
- .xor => 0x6,
- .@"and" => 0x4,
- .@"or" => 0x1,
- .sbb => 0x3,
- .cmp => 0x7,
- .mov => 0x0,
- .jmp_near => 0x4,
- .call_near => 0x2,
- .push => 0x6,
- .pop => 0x0,
- .@"test" => 0x0,
- .seto,
- .setno,
- .setb,
- .setc,
- .setnae,
- .setnb,
- .setnc,
- .setae,
- .sete,
- .setz,
- .setne,
- .setnz,
- .setbe,
- .setna,
- .seta,
- .setnbe,
- .sets,
- .setns,
- .setp,
- .setpe,
- .setnp,
- .setpo,
- .setl,
- .setnge,
- .setnl,
- .setge,
- .setle,
- .setng,
- .setnle,
- .setg,
- => 0x0,
- .shl,
- .sal,
- => 0x4,
- .shr => 0x5,
- .sar => 0x7,
- .mul => 0x4,
- .imul => 0x5,
- .div => 0x6,
- .idiv => 0x7,
- .fisttp16 => 0x1,
- .fisttp32 => 0x1,
- .fisttp64 => 0x1,
- .fld32 => 0x0,
- .fld64 => 0x0,
- else => unreachable,
- };
-}
-
-const VexEncoding = struct {
- prefix: Encoder.Vex,
- reg: ?enum {
- ndd,
- nds,
- dds,
- },
-};
-
-inline fn getVexEncoding(tag: Tag, enc: Encoding) VexEncoding {
- const desc: struct {
- reg: enum {
- none,
- ndd,
- nds,
- dds,
- } = .none,
- len_256: bool = false,
- wig: bool = false,
- lig: bool = false,
- lz: bool = false,
- lead_opc: enum {
- l_0f,
- l_0f_3a,
- l_0f_38,
- } = .l_0f,
- simd_prefix: enum {
- none,
- p_66,
- p_f2,
- p_f3,
- } = .none,
- } = blk: {
- switch (enc) {
- .mv => switch (tag) {
- .vmovsd => break :blk .{ .lig = true, .simd_prefix = .p_f2, .wig = true },
- .vmovss => break :blk .{ .lig = true, .simd_prefix = .p_f3, .wig = true },
- else => unreachable,
- },
- .vm => switch (tag) {
- .vmovsd => break :blk .{ .lig = true, .simd_prefix = .p_f2, .wig = true },
- .vmovss => break :blk .{ .lig = true, .simd_prefix = .p_f3, .wig = true },
- .vucomisd => break :blk .{ .lig = true, .simd_prefix = .p_66, .wig = true },
- .vucomiss => break :blk .{ .lig = true, .wig = true },
- else => unreachable,
- },
- .rvm => switch (tag) {
- .vaddsd => break :blk .{ .reg = .nds, .lig = true, .simd_prefix = .p_f2, .wig = true },
- .vaddss => break :blk .{ .reg = .nds, .lig = true, .simd_prefix = .p_f3, .wig = true },
- .vmovsd => break :blk .{ .reg = .nds, .lig = true, .simd_prefix = .p_f2, .wig = true },
- .vmovss => break :blk .{ .reg = .nds, .lig = true, .simd_prefix = .p_f3, .wig = true },
- else => unreachable,
- },
- .rvmi => switch (tag) {
- .vcmpsd => break :blk .{ .reg = .nds, .lig = true, .simd_prefix = .p_f2, .wig = true },
- .vcmpss => break :blk .{ .reg = .nds, .lig = true, .simd_prefix = .p_f3, .wig = true },
- else => unreachable,
- },
- else => unreachable,
- }
- };
-
- var vex: Encoder.Vex = .{};
-
- if (desc.len_256) vex.len_256();
- if (desc.wig) vex.wig();
- if (desc.lig) vex.lig();
- if (desc.lz) vex.lz();
-
- switch (desc.lead_opc) {
- .l_0f => {},
- .l_0f_3a => vex.lead_opc_0f_3a(),
- .l_0f_38 => vex.lead_opc_0f_38(),
- }
-
- switch (desc.simd_prefix) {
- .none => {},
- .p_66 => vex.simd_prefix_66(),
- .p_f2 => vex.simd_prefix_f2(),
- .p_f3 => vex.simd_prefix_f3(),
- }
-
- return VexEncoding{ .prefix = vex, .reg = switch (desc.reg) {
- .none => null,
- .nds => .nds,
- .dds => .dds,
- .ndd => .ndd,
- } };
-}
-
-const ScaleIndex = packed struct {
- scale: u2,
- index: Register,
-};
-
-const Memory = struct {
- base: ?Register,
- rip: bool = false,
- disp: u32,
- ptr_size: PtrSize,
- scale_index: ?ScaleIndex = null,
-
- const PtrSize = enum(u2) {
- byte_ptr = 0b00,
- word_ptr = 0b01,
- dword_ptr = 0b10,
- qword_ptr = 0b11,
-
- fn new(bit_size: u64) PtrSize {
- return @intToEnum(PtrSize, math.log2_int(u4, @intCast(u4, @divExact(bit_size, 8))));
- }
-
- /// Returns size in bits.
- fn size(ptr_size: PtrSize) u64 {
- return 8 * (math.powi(u8, 2, @enumToInt(ptr_size)) catch unreachable);
- }
- };
-
- fn encode(mem_op: Memory, encoder: Encoder, operand: u3) void {
- if (mem_op.base) |base| {
- const dst = base.lowEnc();
- const src = operand;
- if (dst == 4 or mem_op.scale_index != null) {
- if (mem_op.disp == 0 and dst != 5) {
- encoder.modRm_SIBDisp0(src);
- if (mem_op.scale_index) |si| {
- encoder.sib_scaleIndexBase(si.scale, si.index.lowEnc(), dst);
- } else {
- encoder.sib_base(dst);
- }
- } else if (immOpSize(mem_op.disp) == 8) {
- encoder.modRm_SIBDisp8(src);
- if (mem_op.scale_index) |si| {
- encoder.sib_scaleIndexBaseDisp8(si.scale, si.index.lowEnc(), dst);
- } else {
- encoder.sib_baseDisp8(dst);
- }
- encoder.disp8(@bitCast(i8, @truncate(u8, mem_op.disp)));
- } else {
- encoder.modRm_SIBDisp32(src);
- if (mem_op.scale_index) |si| {
- encoder.sib_scaleIndexBaseDisp32(si.scale, si.index.lowEnc(), dst);
- } else {
- encoder.sib_baseDisp32(dst);
- }
- encoder.disp32(@bitCast(i32, mem_op.disp));
- }
- } else {
- if (mem_op.disp == 0 and dst != 5) {
- encoder.modRm_indirectDisp0(src, dst);
- } else if (immOpSize(mem_op.disp) == 8) {
- encoder.modRm_indirectDisp8(src, dst);
- encoder.disp8(@bitCast(i8, @truncate(u8, mem_op.disp)));
- } else {
- encoder.modRm_indirectDisp32(src, dst);
- encoder.disp32(@bitCast(i32, mem_op.disp));
- }
- }
- } else {
- if (mem_op.rip) {
- encoder.modRm_RIPDisp32(operand);
- } else {
- encoder.modRm_SIBDisp0(operand);
- if (mem_op.scale_index) |si| {
- encoder.sib_scaleIndexDisp32(si.scale, si.index.lowEnc());
- } else {
- encoder.sib_disp32();
- }
- }
- encoder.disp32(@bitCast(i32, mem_op.disp));
- }
- }
-
- /// Returns size in bits.
- fn size(memory: Memory) u64 {
- return memory.ptr_size.size();
- }
-};
-
-fn encodeImm(encoder: Encoder, imm: u32, size: u64) void {
- switch (size) {
- 8 => encoder.imm8(@bitCast(i8, @truncate(u8, imm))),
- 16 => encoder.imm16(@bitCast(i16, @truncate(u16, imm))),
- 32, 64 => encoder.imm32(@bitCast(i32, imm)),
- else => unreachable,
- }
-}
-
-const RegisterOrMemory = union(enum) {
- register: Register,
- memory: Memory,
-
- fn reg(register: Register) RegisterOrMemory {
- return .{ .register = register };
- }
-
- fn mem(ptr_size: Memory.PtrSize, args: struct {
- disp: u32,
- base: ?Register = null,
- scale_index: ?ScaleIndex = null,
- }) RegisterOrMemory {
- return .{
- .memory = .{
- .base = args.base,
- .disp = args.disp,
- .ptr_size = ptr_size,
- .scale_index = args.scale_index,
- },
- };
- }
-
- fn rip(ptr_size: Memory.PtrSize, disp: u32) RegisterOrMemory {
- return .{
- .memory = .{
- .base = null,
- .rip = true,
- .disp = disp,
- .ptr_size = ptr_size,
- },
- };
- }
-
- /// Returns size in bits.
- fn size(reg_or_mem: RegisterOrMemory) u64 {
- return switch (reg_or_mem) {
- .register => |register| register.size(),
- .memory => |memory| memory.size(),
- };
- }
-};
-
-fn lowerToZoEnc(tag: Tag, code: *std.ArrayList(u8)) InnerError!void {
- assert(!tag.isAvx());
- const opc = getOpCode(tag, .zo, false);
- const encoder = try Encoder.init(code, 2);
- switch (tag) {
- .cqo => {
- encoder.rex(.{
- .w = true,
- });
- },
- else => {},
- }
- opc.encode(encoder);
-}
-
-fn lowerToIEnc(tag: Tag, imm: u32, code: *std.ArrayList(u8)) InnerError!void {
- assert(!tag.isAvx());
- if (tag == .ret_far or tag == .ret_near) {
- const encoder = try Encoder.init(code, 3);
- const opc = getOpCode(tag, .i, false);
- opc.encode(encoder);
- encoder.imm16(@bitCast(i16, @truncate(u16, imm)));
- return;
- }
- const opc = getOpCode(tag, .i, immOpSize(imm) == 8);
- const encoder = try Encoder.init(code, 5);
- if (immOpSize(imm) == 16) {
- encoder.prefix16BitMode();
- }
- opc.encode(encoder);
- encodeImm(encoder, imm, immOpSize(imm));
-}
-
-fn lowerToOEnc(tag: Tag, reg: Register, code: *std.ArrayList(u8)) InnerError!void {
- assert(!tag.isAvx());
- const opc = getOpCode(tag, .o, false);
- const encoder = try Encoder.init(code, 3);
- if (reg.size() == 16) {
- encoder.prefix16BitMode();
- }
- encoder.rex(.{
- .w = false,
- .b = reg.isExtended(),
- });
- opc.encodeWithReg(encoder, reg);
-}
-
-fn lowerToDEnc(tag: Tag, imm: u32, code: *std.ArrayList(u8)) InnerError!void {
- assert(!tag.isAvx());
- const opc = getOpCode(tag, .d, false);
- const encoder = try Encoder.init(code, 6);
- opc.encode(encoder);
- encoder.imm32(@bitCast(i32, imm));
-}
-
-fn lowerToMxEnc(tag: Tag, reg_or_mem: RegisterOrMemory, enc: Encoding, code: *std.ArrayList(u8)) InnerError!void {
- assert(!tag.isAvx());
- const opc = getOpCode(tag, enc, reg_or_mem.size() == 8);
- const modrm_ext = getModRmExt(tag);
- switch (reg_or_mem) {
- .register => |reg| {
- const encoder = try Encoder.init(code, 4);
- if (reg.size() == 16) {
- encoder.prefix16BitMode();
- }
- const wide = if (tag == .jmp_near) false else setRexWRegister(reg);
- encoder.rex(.{
- .w = wide,
- .b = reg.isExtended(),
- });
- opc.encode(encoder);
- encoder.modRm_direct(modrm_ext, reg.lowEnc());
- },
- .memory => |mem_op| {
- const encoder = try Encoder.init(code, 8);
- if (mem_op.ptr_size == .word_ptr) {
- encoder.prefix16BitMode();
- }
- if (mem_op.base) |base| {
- const wide = if (tag == .jmp_near) false else mem_op.ptr_size == .qword_ptr;
- encoder.rex(.{
- .w = wide,
- .b = base.isExtended(),
- .x = if (mem_op.scale_index) |si| si.index.isExtended() else false,
- });
- }
- opc.encode(encoder);
- mem_op.encode(encoder, modrm_ext);
- },
- }
-}
-
-fn lowerToMEnc(tag: Tag, reg_or_mem: RegisterOrMemory, code: *std.ArrayList(u8)) InnerError!void {
- return lowerToMxEnc(tag, reg_or_mem, .m, code);
-}
-
-fn lowerToM1Enc(tag: Tag, reg_or_mem: RegisterOrMemory, code: *std.ArrayList(u8)) InnerError!void {
- return lowerToMxEnc(tag, reg_or_mem, .m1, code);
-}
-
-fn lowerToMcEnc(tag: Tag, reg_or_mem: RegisterOrMemory, code: *std.ArrayList(u8)) InnerError!void {
- return lowerToMxEnc(tag, reg_or_mem, .mc, code);
-}
-
-fn lowerToTdEnc(tag: Tag, moffs: u64, reg: Register, code: *std.ArrayList(u8)) InnerError!void {
- return lowerToTdFdEnc(tag, reg, moffs, code, true);
-}
-
-fn lowerToFdEnc(tag: Tag, reg: Register, moffs: u64, code: *std.ArrayList(u8)) InnerError!void {
- return lowerToTdFdEnc(tag, reg, moffs, code, false);
-}
-
-fn lowerToTdFdEnc(tag: Tag, reg: Register, moffs: u64, code: *std.ArrayList(u8), td: bool) InnerError!void {
- assert(!tag.isAvx());
- const opc = if (td) getOpCode(tag, .td, reg.size() == 8) else getOpCode(tag, .fd, reg.size() == 8);
- const encoder = try Encoder.init(code, 10);
- if (reg.size() == 16) {
- encoder.prefix16BitMode();
- }
- encoder.rex(.{
- .w = setRexWRegister(reg),
- });
- opc.encode(encoder);
- switch (reg.size()) {
- 8 => encoder.imm8(@bitCast(i8, @truncate(u8, moffs))),
- 16 => encoder.imm16(@bitCast(i16, @truncate(u16, moffs))),
- 32 => encoder.imm32(@bitCast(i32, @truncate(u32, moffs))),
- 64 => encoder.imm64(moffs),
- else => unreachable,
- }
-}
-
-fn lowerToOiEnc(tag: Tag, reg: Register, imm: u64, code: *std.ArrayList(u8)) InnerError!void {
- assert(!tag.isAvx());
- const opc = getOpCode(tag, .oi, reg.size() == 8);
- const encoder = try Encoder.init(code, 10);
- if (reg.size() == 16) {
- encoder.prefix16BitMode();
- }
- encoder.rex(.{
- .w = setRexWRegister(reg),
- .b = reg.isExtended(),
- });
- opc.encodeWithReg(encoder, reg);
- switch (reg.size()) {
- 8 => encoder.imm8(@bitCast(i8, @truncate(u8, imm))),
- 16 => encoder.imm16(@bitCast(i16, @truncate(u16, imm))),
- 32 => encoder.imm32(@bitCast(i32, @truncate(u32, imm))),
- 64 => encoder.imm64(imm),
- else => unreachable,
- }
-}
-
-fn lowerToMiXEnc(
- tag: Tag,
- reg_or_mem: RegisterOrMemory,
- imm: u32,
- enc: Encoding,
- code: *std.ArrayList(u8),
-) InnerError!void {
- assert(!tag.isAvx());
- const modrm_ext = getModRmExt(tag);
- const opc = getOpCode(tag, enc, reg_or_mem.size() == 8);
- switch (reg_or_mem) {
- .register => |dst_reg| {
- const encoder = try Encoder.init(code, 7);
- if (dst_reg.size() == 16) {
- // 0x66 prefix switches to the non-default size; here we assume a switch from
- // the default 32bits to 16bits operand-size.
- // More info: https://www.cs.uni-potsdam.de/desn/lehre/ss15/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.pdf#page=32&zoom=auto,-159,773
- encoder.prefix16BitMode();
- }
- encoder.rex(.{
- .w = setRexWRegister(dst_reg),
- .b = dst_reg.isExtended(),
- });
- opc.encode(encoder);
- encoder.modRm_direct(modrm_ext, dst_reg.lowEnc());
- encodeImm(encoder, imm, if (enc == .mi8) 8 else dst_reg.size());
- },
- .memory => |dst_mem| {
- const encoder = try Encoder.init(code, 12);
- if (dst_mem.ptr_size == .word_ptr) {
- encoder.prefix16BitMode();
- }
- if (dst_mem.base) |base| {
- encoder.rex(.{
- .w = dst_mem.ptr_size == .qword_ptr,
- .b = base.isExtended(),
- .x = if (dst_mem.scale_index) |si| si.index.isExtended() else false,
- });
- } else {
- encoder.rex(.{
- .w = dst_mem.ptr_size == .qword_ptr,
- .x = if (dst_mem.scale_index) |si| si.index.isExtended() else false,
- });
- }
- opc.encode(encoder);
- dst_mem.encode(encoder, modrm_ext);
- encodeImm(encoder, imm, if (enc == .mi8) 8 else dst_mem.ptr_size.size());
- },
- }
-}
-
-fn lowerToMiImm8Enc(tag: Tag, reg_or_mem: RegisterOrMemory, imm: u8, code: *std.ArrayList(u8)) InnerError!void {
- return lowerToMiXEnc(tag, reg_or_mem, imm, .mi8, code);
-}
-
-fn lowerToMiEnc(tag: Tag, reg_or_mem: RegisterOrMemory, imm: u32, code: *std.ArrayList(u8)) InnerError!void {
- return lowerToMiXEnc(tag, reg_or_mem, imm, .mi, code);
-}
-
-fn lowerToRmEnc(
- tag: Tag,
- reg: Register,
- reg_or_mem: RegisterOrMemory,
- code: *std.ArrayList(u8),
-) InnerError!void {
- assert(!tag.isAvx());
- const opc = getOpCode(tag, .rm, reg.size() == 8 or reg_or_mem.size() == 8);
- switch (reg_or_mem) {
- .register => |src_reg| {
- const encoder = try Encoder.init(code, 5);
- if (reg.size() == 16) {
- encoder.prefix16BitMode();
- }
- encoder.rex(.{
- .w = setRexWRegister(reg) or setRexWRegister(src_reg),
- .r = reg.isExtended(),
- .b = src_reg.isExtended(),
- });
- opc.encode(encoder);
- encoder.modRm_direct(reg.lowEnc(), src_reg.lowEnc());
- },
- .memory => |src_mem| {
- const encoder = try Encoder.init(code, 9);
- if (reg.size() == 16) {
- encoder.prefix16BitMode();
- }
- if (src_mem.base) |base| {
- // TODO handle 32-bit base register - requires prefix 0x67
- // Intel Manual, Vol 1, chapter 3.6 and 3.6.1
- encoder.rex(.{
- .w = setRexWRegister(reg),
- .r = reg.isExtended(),
- .b = base.isExtended(),
- .x = if (src_mem.scale_index) |si| si.index.isExtended() else false,
- });
- } else {
- encoder.rex(.{
- .w = setRexWRegister(reg),
- .r = reg.isExtended(),
- .x = if (src_mem.scale_index) |si| si.index.isExtended() else false,
- });
- }
- opc.encode(encoder);
- src_mem.encode(encoder, reg.lowEnc());
- },
- }
-}
-
-fn lowerToMrEnc(
- tag: Tag,
- reg_or_mem: RegisterOrMemory,
- reg: Register,
- code: *std.ArrayList(u8),
-) InnerError!void {
- assert(!tag.isAvx());
- const opc = getOpCode(tag, .mr, reg.size() == 8 or reg_or_mem.size() == 8);
- switch (reg_or_mem) {
- .register => |dst_reg| {
- const encoder = try Encoder.init(code, 4);
- if (dst_reg.size() == 16) {
- encoder.prefix16BitMode();
- }
- encoder.rex(.{
- .w = setRexWRegister(dst_reg) or setRexWRegister(reg),
- .r = reg.isExtended(),
- .b = dst_reg.isExtended(),
- });
- opc.encode(encoder);
- encoder.modRm_direct(reg.lowEnc(), dst_reg.lowEnc());
- },
- .memory => |dst_mem| {
- const encoder = try Encoder.init(code, 9);
- if (reg.size() == 16) {
- encoder.prefix16BitMode();
- }
- if (dst_mem.base) |base| {
- encoder.rex(.{
- .w = dst_mem.ptr_size == .qword_ptr or setRexWRegister(reg),
- .r = reg.isExtended(),
- .b = base.isExtended(),
- .x = if (dst_mem.scale_index) |si| si.index.isExtended() else false,
- });
- } else {
- encoder.rex(.{
- .w = dst_mem.ptr_size == .qword_ptr or setRexWRegister(reg),
- .r = reg.isExtended(),
- .x = if (dst_mem.scale_index) |si| si.index.isExtended() else false,
- });
- }
- opc.encode(encoder);
- dst_mem.encode(encoder, reg.lowEnc());
- },
- }
-}
-
-fn lowerToRmiEnc(
- tag: Tag,
- reg: Register,
- reg_or_mem: RegisterOrMemory,
- imm: u32,
- code: *std.ArrayList(u8),
-) InnerError!void {
- assert(!tag.isAvx());
- const opc = getOpCode(tag, .rmi, false);
- const encoder = try Encoder.init(code, 13);
- if (reg.size() == 16) {
- encoder.prefix16BitMode();
- }
- switch (reg_or_mem) {
- .register => |src_reg| {
- encoder.rex(.{
- .w = setRexWRegister(reg) or setRexWRegister(src_reg),
- .r = reg.isExtended(),
- .b = src_reg.isExtended(),
- });
- opc.encode(encoder);
- encoder.modRm_direct(reg.lowEnc(), src_reg.lowEnc());
- },
- .memory => |src_mem| {
- if (src_mem.base) |base| {
- // TODO handle 32-bit base register - requires prefix 0x67
- // Intel Manual, Vol 1, chapter 3.6 and 3.6.1
- encoder.rex(.{
- .w = setRexWRegister(reg),
- .r = reg.isExtended(),
- .b = base.isExtended(),
- .x = if (src_mem.scale_index) |si| si.index.isExtended() else false,
- });
- } else {
- encoder.rex(.{
- .w = setRexWRegister(reg),
- .r = reg.isExtended(),
- .x = if (src_mem.scale_index) |si| si.index.isExtended() else false,
- });
- }
- opc.encode(encoder);
- src_mem.encode(encoder, reg.lowEnc());
- },
- }
- encodeImm(encoder, imm, reg.size());
-}
-
-/// Also referred to as XM encoding in Intel manual.
-fn lowerToVmEnc(
- tag: Tag,
- reg: Register,
- reg_or_mem: RegisterOrMemory,
- code: *std.ArrayList(u8),
-) InnerError!void {
- const opc = getOpCode(tag, .vm, false);
- var enc = getVexEncoding(tag, .vm);
- const vex = &enc.prefix;
- switch (reg_or_mem) {
- .register => |src_reg| {
- const encoder = try Encoder.init(code, 5);
- vex.rex(.{
- .r = reg.isExtended(),
- .b = src_reg.isExtended(),
- });
- encoder.vex(enc.prefix);
- opc.encode(encoder);
- encoder.modRm_direct(reg.lowEnc(), src_reg.lowEnc());
- },
- .memory => |src_mem| {
- const encoder = try Encoder.init(code, 10);
- if (src_mem.base) |base| {
- vex.rex(.{
- .r = reg.isExtended(),
- .b = base.isExtended(),
- .x = if (src_mem.scale_index) |si| si.index.isExtended() else false,
- });
- } else {
- vex.rex(.{
- .r = reg.isExtended(),
- .x = if (src_mem.scale_index) |si| si.index.isExtended() else false,
- });
- }
- encoder.vex(enc.prefix);
- opc.encode(encoder);
- src_mem.encode(encoder, reg.lowEnc());
- },
- }
-}
-
-/// Usually referred to as MR encoding with V/V in Intel manual.
-fn lowerToMvEnc(
- tag: Tag,
- reg_or_mem: RegisterOrMemory,
- reg: Register,
- code: *std.ArrayList(u8),
-) InnerError!void {
- const opc = getOpCode(tag, .mv, false);
- var enc = getVexEncoding(tag, .mv);
- const vex = &enc.prefix;
- switch (reg_or_mem) {
- .register => |dst_reg| {
- const encoder = try Encoder.init(code, 4);
- vex.rex(.{
- .r = reg.isExtended(),
- .b = dst_reg.isExtended(),
- });
- encoder.vex(enc.prefix);
- opc.encode(encoder);
- encoder.modRm_direct(reg.lowEnc(), dst_reg.lowEnc());
- },
- .memory => |dst_mem| {
- const encoder = try Encoder.init(code, 10);
- if (dst_mem.base) |base| {
- vex.rex(.{
- .r = reg.isExtended(),
- .b = base.isExtended(),
- .x = if (dst_mem.scale_index) |si| si.index.isExtended() else false,
- });
- } else {
- vex.rex(.{
- .r = reg.isExtended(),
- .x = if (dst_mem.scale_index) |si| si.index.isExtended() else false,
- });
- }
- encoder.vex(enc.prefix);
- opc.encode(encoder);
- dst_mem.encode(encoder, reg.lowEnc());
- },
- }
-}
-
-fn lowerToRvmEnc(
- tag: Tag,
- reg1: Register,
- reg2: Register,
- reg_or_mem: RegisterOrMemory,
- code: *std.ArrayList(u8),
-) InnerError!void {
- const opc = getOpCode(tag, .rvm, false);
- var enc = getVexEncoding(tag, .rvm);
- const vex = &enc.prefix;
- switch (reg_or_mem) {
- .register => |reg3| {
- if (enc.reg) |vvvv| {
- switch (vvvv) {
- .nds => vex.reg(reg2.enc()),
- else => unreachable, // TODO
- }
- }
- const encoder = try Encoder.init(code, 5);
- vex.rex(.{
- .r = reg1.isExtended(),
- .b = reg3.isExtended(),
- });
- encoder.vex(enc.prefix);
- opc.encode(encoder);
- encoder.modRm_direct(reg1.lowEnc(), reg3.lowEnc());
- },
- .memory => |dst_mem| {
- _ = dst_mem;
- unreachable; // TODO
- },
- }
-}
-
-fn lowerToRvmiEnc(
- tag: Tag,
- reg1: Register,
- reg2: Register,
- reg_or_mem: RegisterOrMemory,
- imm: u32,
- code: *std.ArrayList(u8),
-) InnerError!void {
- const opc = getOpCode(tag, .rvmi, false);
- var enc = getVexEncoding(tag, .rvmi);
- const vex = &enc.prefix;
- const encoder: Encoder = blk: {
- switch (reg_or_mem) {
- .register => |reg3| {
- if (enc.reg) |vvvv| {
- switch (vvvv) {
- .nds => vex.reg(reg2.enc()),
- else => unreachable, // TODO
- }
- }
- const encoder = try Encoder.init(code, 5);
- vex.rex(.{
- .r = reg1.isExtended(),
- .b = reg3.isExtended(),
- });
- encoder.vex(enc.prefix);
- opc.encode(encoder);
- encoder.modRm_direct(reg1.lowEnc(), reg3.lowEnc());
- break :blk encoder;
- },
- .memory => |dst_mem| {
- _ = dst_mem;
- unreachable; // TODO
- },
- }
- };
- encodeImm(encoder, imm, 8); // TODO
-}
-
-fn expectEqualHexStrings(expected: []const u8, given: []const u8, assembly: []const u8) !void {
- assert(expected.len > 0);
- if (mem.eql(u8, expected, given)) return;
- const expected_fmt = try std.fmt.allocPrint(testing.allocator, "{x}", .{std.fmt.fmtSliceHexLower(expected)});
- defer testing.allocator.free(expected_fmt);
- const given_fmt = try std.fmt.allocPrint(testing.allocator, "{x}", .{std.fmt.fmtSliceHexLower(given)});
- defer testing.allocator.free(given_fmt);
- const idx = mem.indexOfDiff(u8, expected_fmt, given_fmt).?;
- var padding = try testing.allocator.alloc(u8, idx + 5);
- defer testing.allocator.free(padding);
- mem.set(u8, padding, ' ');
- std.debug.print("\nASM: {s}\nEXP: {s}\nGIV: {s}\n{s}^ -- first differing byte\n", .{
- assembly,
- expected_fmt,
- given_fmt,
- padding,
- });
- return error.TestFailed;
-}
-
-const TestEmit = struct {
- code_buffer: std.ArrayList(u8),
- next: usize = 0,
-
- fn init() TestEmit {
- return .{
- .code_buffer = std.ArrayList(u8).init(testing.allocator),
- };
- }
-
- fn deinit(emit: *TestEmit) void {
- emit.code_buffer.deinit();
- emit.next = undefined;
- }
-
- fn code(emit: *TestEmit) *std.ArrayList(u8) {
- emit.next = emit.code_buffer.items.len;
- return &emit.code_buffer;
- }
-
- fn lowered(emit: TestEmit) []const u8 {
- return emit.code_buffer.items[emit.next..];
- }
-};
-
-test "lower MI encoding" {
- var emit = TestEmit.init();
- defer emit.deinit();
- try lowerToMiEnc(.mov, RegisterOrMemory.reg(.rax), 0x10, emit.code());
- try expectEqualHexStrings("\x48\xc7\xc0\x10\x00\x00\x00", emit.lowered(), "mov rax, 0x10");
- try lowerToMiEnc(.mov, RegisterOrMemory.mem(.dword_ptr, .{ .disp = 0, .base = .r11 }), 0x10, emit.code());
- try expectEqualHexStrings("\x41\xc7\x03\x10\x00\x00\x00", emit.lowered(), "mov dword ptr [r11 + 0], 0x10");
- try lowerToMiEnc(.add, RegisterOrMemory.mem(.dword_ptr, .{
- .disp = @bitCast(u32, @as(i32, -8)),
- .base = .rdx,
- }), 0x10, emit.code());
- try expectEqualHexStrings("\x81\x42\xF8\x10\x00\x00\x00", emit.lowered(), "add dword ptr [rdx - 8], 0x10");
- try lowerToMiEnc(.sub, RegisterOrMemory.mem(.dword_ptr, .{
- .disp = 0x10000000,
- .base = .r11,
- }), 0x10, emit.code());
- try expectEqualHexStrings(
- "\x41\x81\xab\x00\x00\x00\x10\x10\x00\x00\x00",
- emit.lowered(),
- "sub dword ptr [r11 + 0x10000000], 0x10",
- );
- try lowerToMiEnc(.@"and", RegisterOrMemory.mem(.dword_ptr, .{ .disp = 0x10000000 }), 0x10, emit.code());
- try expectEqualHexStrings(
- "\x81\x24\x25\x00\x00\x00\x10\x10\x00\x00\x00",
- emit.lowered(),
- "and dword ptr [ds:0x10000000], 0x10",
- );
- try lowerToMiEnc(.@"and", RegisterOrMemory.mem(.dword_ptr, .{
- .disp = 0x10000000,
- .base = .r12,
- }), 0x10, emit.code());
- try expectEqualHexStrings(
- "\x41\x81\xA4\x24\x00\x00\x00\x10\x10\x00\x00\x00",
- emit.lowered(),
- "and dword ptr [r12 + 0x10000000], 0x10",
- );
- try lowerToMiEnc(.mov, RegisterOrMemory.rip(.qword_ptr, 0x10), 0x10, emit.code());
- try expectEqualHexStrings(
- "\x48\xC7\x05\x10\x00\x00\x00\x10\x00\x00\x00",
- emit.lowered(),
- "mov qword ptr [rip + 0x10], 0x10",
- );
- try lowerToMiEnc(.mov, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = @bitCast(u32, @as(i32, -8)),
- .base = .rbp,
- }), 0x10, emit.code());
- try expectEqualHexStrings(
- "\x48\xc7\x45\xf8\x10\x00\x00\x00",
- emit.lowered(),
- "mov qword ptr [rbp - 8], 0x10",
- );
- try lowerToMiEnc(.mov, RegisterOrMemory.mem(.word_ptr, .{
- .disp = @bitCast(u32, @as(i32, -2)),
- .base = .rbp,
- }), 0x10, emit.code());
- try expectEqualHexStrings("\x66\xC7\x45\xFE\x10\x00", emit.lowered(), "mov word ptr [rbp - 2], 0x10");
- try lowerToMiEnc(.mov, RegisterOrMemory.mem(.byte_ptr, .{
- .disp = @bitCast(u32, @as(i32, -1)),
- .base = .rbp,
- }), 0x10, emit.code());
- try expectEqualHexStrings("\xC6\x45\xFF\x10", emit.lowered(), "mov byte ptr [rbp - 1], 0x10");
- try lowerToMiEnc(.mov, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = 0x10000000,
- .scale_index = .{
- .scale = 1,
- .index = .rcx,
- },
- }), 0x10, emit.code());
- try expectEqualHexStrings(
- "\x48\xC7\x04\x4D\x00\x00\x00\x10\x10\x00\x00\x00",
- emit.lowered(),
- "mov qword ptr [rcx*2 + 0x10000000], 0x10",
- );
-
- try lowerToMiImm8Enc(.add, RegisterOrMemory.reg(.rax), 0x10, emit.code());
- try expectEqualHexStrings("\x48\x83\xC0\x10", emit.lowered(), "add rax, 0x10");
-}
-
-test "lower RM encoding" {
- var emit = TestEmit.init();
- defer emit.deinit();
- try lowerToRmEnc(.mov, .rax, RegisterOrMemory.reg(.rbx), emit.code());
- try expectEqualHexStrings("\x48\x8b\xc3", emit.lowered(), "mov rax, rbx");
- try lowerToRmEnc(.mov, .rax, RegisterOrMemory.mem(.qword_ptr, .{ .disp = 0, .base = .r11 }), emit.code());
- try expectEqualHexStrings("\x49\x8b\x03", emit.lowered(), "mov rax, qword ptr [r11 + 0]");
- try lowerToRmEnc(.add, .r11, RegisterOrMemory.mem(.qword_ptr, .{ .disp = 0x10000000 }), emit.code());
- try expectEqualHexStrings(
- "\x4C\x03\x1C\x25\x00\x00\x00\x10",
- emit.lowered(),
- "add r11, qword ptr [ds:0x10000000]",
- );
- try lowerToRmEnc(.add, .r12b, RegisterOrMemory.mem(.byte_ptr, .{ .disp = 0x10000000 }), emit.code());
- try expectEqualHexStrings(
- "\x44\x02\x24\x25\x00\x00\x00\x10",
- emit.lowered(),
- "add r11b, byte ptr [ds:0x10000000]",
- );
- try lowerToRmEnc(.sub, .r11, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = 0x10000000,
- .base = .r13,
- }), emit.code());
- try expectEqualHexStrings(
- "\x4D\x2B\x9D\x00\x00\x00\x10",
- emit.lowered(),
- "sub r11, qword ptr [r13 + 0x10000000]",
- );
- try lowerToRmEnc(.sub, .r11, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = 0x10000000,
- .base = .r12,
- }), emit.code());
- try expectEqualHexStrings(
- "\x4D\x2B\x9C\x24\x00\x00\x00\x10",
- emit.lowered(),
- "sub r11, qword ptr [r12 + 0x10000000]",
- );
- try lowerToRmEnc(.mov, .rax, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = @bitCast(u32, @as(i32, -4)),
- .base = .rbp,
- }), emit.code());
- try expectEqualHexStrings("\x48\x8B\x45\xFC", emit.lowered(), "mov rax, qword ptr [rbp - 4]");
- try lowerToRmEnc(.lea, .rax, RegisterOrMemory.rip(.qword_ptr, 0x10), emit.code());
- try expectEqualHexStrings("\x48\x8D\x05\x10\x00\x00\x00", emit.lowered(), "lea rax, [rip + 0x10]");
- try lowerToRmEnc(.mov, .rax, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = @bitCast(u32, @as(i32, -8)),
- .base = .rbp,
- .scale_index = .{
- .scale = 0,
- .index = .rcx,
- },
- }), emit.code());
- try expectEqualHexStrings("\x48\x8B\x44\x0D\xF8", emit.lowered(), "mov rax, qword ptr [rbp + rcx*1 - 8]");
- try lowerToRmEnc(.mov, .eax, RegisterOrMemory.mem(.dword_ptr, .{
- .disp = @bitCast(u32, @as(i32, -4)),
- .base = .rbp,
- .scale_index = .{
- .scale = 2,
- .index = .rdx,
- },
- }), emit.code());
- try expectEqualHexStrings("\x8B\x44\x95\xFC", emit.lowered(), "mov eax, dword ptr [rbp + rdx*4 - 4]");
- try lowerToRmEnc(.mov, .rax, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = @bitCast(u32, @as(i32, -8)),
- .base = .rbp,
- .scale_index = .{
- .scale = 3,
- .index = .rcx,
- },
- }), emit.code());
- try expectEqualHexStrings("\x48\x8B\x44\xCD\xF8", emit.lowered(), "mov rax, qword ptr [rbp + rcx*8 - 8]");
- try lowerToRmEnc(.mov, .r8b, RegisterOrMemory.mem(.byte_ptr, .{
- .disp = @bitCast(u32, @as(i32, -24)),
- .base = .rsi,
- .scale_index = .{
- .scale = 0,
- .index = .rcx,
- },
- }), emit.code());
- try expectEqualHexStrings("\x44\x8A\x44\x0E\xE8", emit.lowered(), "mov r8b, byte ptr [rsi + rcx*1 - 24]");
- try lowerToRmEnc(.lea, .rsi, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = 0,
- .base = .rbp,
- .scale_index = .{
- .scale = 0,
- .index = .rcx,
- },
- }), emit.code());
- try expectEqualHexStrings("\x48\x8D\x74\x0D\x00", emit.lowered(), "lea rsi, qword ptr [rbp + rcx*1 + 0]");
-}
-
-test "lower MR encoding" {
- var emit = TestEmit.init();
- defer emit.deinit();
- try lowerToMrEnc(.mov, RegisterOrMemory.reg(.rax), .rbx, emit.code());
- try expectEqualHexStrings("\x48\x89\xd8", emit.lowered(), "mov rax, rbx");
- try lowerToMrEnc(.mov, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = @bitCast(u32, @as(i32, -4)),
- .base = .rbp,
- }), .r11, emit.code());
- try expectEqualHexStrings("\x4c\x89\x5d\xfc", emit.lowered(), "mov qword ptr [rbp - 4], r11");
- try lowerToMrEnc(.add, RegisterOrMemory.mem(.byte_ptr, .{ .disp = 0x10000000 }), .r12b, emit.code());
- try expectEqualHexStrings(
- "\x44\x00\x24\x25\x00\x00\x00\x10",
- emit.lowered(),
- "add byte ptr [ds:0x10000000], r12b",
- );
- try lowerToMrEnc(.add, RegisterOrMemory.mem(.dword_ptr, .{ .disp = 0x10000000 }), .r12d, emit.code());
- try expectEqualHexStrings(
- "\x44\x01\x24\x25\x00\x00\x00\x10",
- emit.lowered(),
- "add dword ptr [ds:0x10000000], r12d",
- );
- try lowerToMrEnc(.sub, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = 0x10000000,
- .base = .r11,
- }), .r12, emit.code());
- try expectEqualHexStrings(
- "\x4D\x29\xA3\x00\x00\x00\x10",
- emit.lowered(),
- "sub qword ptr [r11 + 0x10000000], r12",
- );
- try lowerToMrEnc(.mov, RegisterOrMemory.rip(.qword_ptr, 0x10), .r12, emit.code());
- try expectEqualHexStrings("\x4C\x89\x25\x10\x00\x00\x00", emit.lowered(), "mov qword ptr [rip + 0x10], r12");
-}
-
-test "lower OI encoding" {
- var emit = TestEmit.init();
- defer emit.deinit();
- try lowerToOiEnc(.mov, .rax, 0x1000000000000000, emit.code());
- try expectEqualHexStrings(
- "\x48\xB8\x00\x00\x00\x00\x00\x00\x00\x10",
- emit.lowered(),
- "movabs rax, 0x1000000000000000",
- );
- try lowerToOiEnc(.mov, .r11, 0x1000000000000000, emit.code());
- try expectEqualHexStrings(
- "\x49\xBB\x00\x00\x00\x00\x00\x00\x00\x10",
- emit.lowered(),
- "movabs r11, 0x1000000000000000",
- );
- try lowerToOiEnc(.mov, .r11d, 0x10000000, emit.code());
- try expectEqualHexStrings("\x41\xBB\x00\x00\x00\x10", emit.lowered(), "mov r11d, 0x10000000");
- try lowerToOiEnc(.mov, .r11w, 0x1000, emit.code());
- try expectEqualHexStrings("\x66\x41\xBB\x00\x10", emit.lowered(), "mov r11w, 0x1000");
- try lowerToOiEnc(.mov, .r11b, 0x10, emit.code());
- try expectEqualHexStrings("\x41\xB3\x10", emit.lowered(), "mov r11b, 0x10");
-}
-
-test "lower FD/TD encoding" {
- var emit = TestEmit.init();
- defer emit.deinit();
- try lowerToFdEnc(.mov, .rax, 0x1000000000000000, emit.code());
- try expectEqualHexStrings(
- "\x48\xa1\x00\x00\x00\x00\x00\x00\x00\x10",
- emit.lowered(),
- "mov rax, ds:0x1000000000000000",
- );
- try lowerToFdEnc(.mov, .eax, 0x10000000, emit.code());
- try expectEqualHexStrings("\xa1\x00\x00\x00\x10", emit.lowered(), "mov eax, ds:0x10000000");
- try lowerToFdEnc(.mov, .ax, 0x1000, emit.code());
- try expectEqualHexStrings("\x66\xa1\x00\x10", emit.lowered(), "mov ax, ds:0x1000");
- try lowerToFdEnc(.mov, .al, 0x10, emit.code());
- try expectEqualHexStrings("\xa0\x10", emit.lowered(), "mov al, ds:0x10");
-}
-
-test "lower M encoding" {
- var emit = TestEmit.init();
- defer emit.deinit();
- try lowerToMEnc(.jmp_near, RegisterOrMemory.reg(.r12), emit.code());
- try expectEqualHexStrings("\x41\xFF\xE4", emit.lowered(), "jmp r12");
- try lowerToMEnc(.jmp_near, RegisterOrMemory.reg(.r12w), emit.code());
- try expectEqualHexStrings("\x66\x41\xFF\xE4", emit.lowered(), "jmp r12w");
- try lowerToMEnc(.jmp_near, RegisterOrMemory.mem(.qword_ptr, .{ .disp = 0, .base = .r12 }), emit.code());
- try expectEqualHexStrings("\x41\xFF\x24\x24", emit.lowered(), "jmp qword ptr [r12]");
- try lowerToMEnc(.jmp_near, RegisterOrMemory.mem(.word_ptr, .{ .disp = 0, .base = .r12 }), emit.code());
- try expectEqualHexStrings("\x66\x41\xFF\x24\x24", emit.lowered(), "jmp word ptr [r12]");
- try lowerToMEnc(.jmp_near, RegisterOrMemory.mem(.qword_ptr, .{ .disp = 0x10, .base = .r12 }), emit.code());
- try expectEqualHexStrings("\x41\xFF\x64\x24\x10", emit.lowered(), "jmp qword ptr [r12 + 0x10]");
- try lowerToMEnc(.jmp_near, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = 0x1000,
- .base = .r12,
- }), emit.code());
- try expectEqualHexStrings(
- "\x41\xFF\xA4\x24\x00\x10\x00\x00",
- emit.lowered(),
- "jmp qword ptr [r12 + 0x1000]",
- );
- try lowerToMEnc(.jmp_near, RegisterOrMemory.rip(.qword_ptr, 0x10), emit.code());
- try expectEqualHexStrings("\xFF\x25\x10\x00\x00\x00", emit.lowered(), "jmp qword ptr [rip + 0x10]");
- try lowerToMEnc(.jmp_near, RegisterOrMemory.mem(.qword_ptr, .{ .disp = 0x10 }), emit.code());
- try expectEqualHexStrings("\xFF\x24\x25\x10\x00\x00\x00", emit.lowered(), "jmp qword ptr [ds:0x10]");
- try lowerToMEnc(.seta, RegisterOrMemory.reg(.r11b), emit.code());
- try expectEqualHexStrings("\x41\x0F\x97\xC3", emit.lowered(), "seta r11b");
- try lowerToMEnc(.idiv, RegisterOrMemory.reg(.rax), emit.code());
- try expectEqualHexStrings("\x48\xF7\xF8", emit.lowered(), "idiv rax");
- try lowerToMEnc(.imul, RegisterOrMemory.reg(.al), emit.code());
- try expectEqualHexStrings("\xF6\xE8", emit.lowered(), "imul al");
-}
-
-test "lower M1 and MC encodings" {
- var emit = TestEmit.init();
- defer emit.deinit();
- try lowerToM1Enc(.sal, RegisterOrMemory.reg(.r12), emit.code());
- try expectEqualHexStrings("\x49\xD1\xE4", emit.lowered(), "sal r12, 1");
- try lowerToM1Enc(.sal, RegisterOrMemory.reg(.r12d), emit.code());
- try expectEqualHexStrings("\x41\xD1\xE4", emit.lowered(), "sal r12d, 1");
- try lowerToM1Enc(.sal, RegisterOrMemory.reg(.r12w), emit.code());
- try expectEqualHexStrings("\x66\x41\xD1\xE4", emit.lowered(), "sal r12w, 1");
- try lowerToM1Enc(.sal, RegisterOrMemory.reg(.r12b), emit.code());
- try expectEqualHexStrings("\x41\xD0\xE4", emit.lowered(), "sal r12b, 1");
- try lowerToM1Enc(.sal, RegisterOrMemory.reg(.rax), emit.code());
- try expectEqualHexStrings("\x48\xD1\xE0", emit.lowered(), "sal rax, 1");
- try lowerToM1Enc(.sal, RegisterOrMemory.reg(.eax), emit.code());
- try expectEqualHexStrings("\xD1\xE0", emit.lowered(), "sal eax, 1");
- try lowerToM1Enc(.sal, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = @bitCast(u32, @as(i32, -0x10)),
- .base = .rbp,
- }), emit.code());
- try expectEqualHexStrings("\x48\xD1\x65\xF0", emit.lowered(), "sal qword ptr [rbp - 0x10], 1");
- try lowerToM1Enc(.sal, RegisterOrMemory.mem(.dword_ptr, .{
- .disp = @bitCast(u32, @as(i32, -0x10)),
- .base = .rbp,
- }), emit.code());
- try expectEqualHexStrings("\xD1\x65\xF0", emit.lowered(), "sal dword ptr [rbp - 0x10], 1");
-
- try lowerToMcEnc(.shr, RegisterOrMemory.reg(.r12), emit.code());
- try expectEqualHexStrings("\x49\xD3\xEC", emit.lowered(), "shr r12, cl");
- try lowerToMcEnc(.shr, RegisterOrMemory.reg(.rax), emit.code());
- try expectEqualHexStrings("\x48\xD3\xE8", emit.lowered(), "shr rax, cl");
-
- try lowerToMcEnc(.sar, RegisterOrMemory.reg(.rsi), emit.code());
- try expectEqualHexStrings("\x48\xD3\xFE", emit.lowered(), "sar rsi, cl");
-}
-
-test "lower O encoding" {
- var emit = TestEmit.init();
- defer emit.deinit();
- try lowerToOEnc(.pop, .r12, emit.code());
- try expectEqualHexStrings("\x41\x5c", emit.lowered(), "pop r12");
- try lowerToOEnc(.push, .r12w, emit.code());
- try expectEqualHexStrings("\x66\x41\x54", emit.lowered(), "push r12w");
-}
-
-test "lower RMI encoding" {
- var emit = TestEmit.init();
- defer emit.deinit();
- try lowerToRmiEnc(.imul, .rax, RegisterOrMemory.mem(.qword_ptr, .{
- .disp = @bitCast(u32, @as(i32, -8)),
- .base = .rbp,
- }), 0x10, emit.code());
- try expectEqualHexStrings(
- "\x48\x69\x45\xF8\x10\x00\x00\x00",
- emit.lowered(),
- "imul rax, qword ptr [rbp - 8], 0x10",
- );
- try lowerToRmiEnc(.imul, .eax, RegisterOrMemory.mem(.dword_ptr, .{
- .disp = @bitCast(u32, @as(i32, -4)),
- .base = .rbp,
- }), 0x10, emit.code());
- try expectEqualHexStrings("\x69\x45\xFC\x10\x00\x00\x00", emit.lowered(), "imul eax, dword ptr [rbp - 4], 0x10");
- try lowerToRmiEnc(.imul, .ax, RegisterOrMemory.mem(.word_ptr, .{
- .disp = @bitCast(u32, @as(i32, -2)),
- .base = .rbp,
- }), 0x10, emit.code());
- try expectEqualHexStrings("\x66\x69\x45\xFE\x10\x00", emit.lowered(), "imul ax, word ptr [rbp - 2], 0x10");
- try lowerToRmiEnc(.imul, .r12, RegisterOrMemory.reg(.r12), 0x10, emit.code());
- try expectEqualHexStrings("\x4D\x69\xE4\x10\x00\x00\x00", emit.lowered(), "imul r12, r12, 0x10");
- try lowerToRmiEnc(.imul, .r12w, RegisterOrMemory.reg(.r12w), 0x10, emit.code());
- try expectEqualHexStrings("\x66\x45\x69\xE4\x10\x00", emit.lowered(), "imul r12w, r12w, 0x10");
-}
-
-test "lower MV encoding" {
- var emit = TestEmit.init();
- defer emit.deinit();
- try lowerToMvEnc(.vmovsd, RegisterOrMemory.rip(.qword_ptr, 0x10), .xmm1, emit.code());
- try expectEqualHexStrings(
- "\xC5\xFB\x11\x0D\x10\x00\x00\x00",
- emit.lowered(),
- "vmovsd qword ptr [rip + 0x10], xmm1",
- );
-}
-
-test "lower VM encoding" {
- var emit = TestEmit.init();
- defer emit.deinit();
- try lowerToVmEnc(.vmovsd, .xmm1, RegisterOrMemory.rip(.qword_ptr, 0x10), emit.code());
- try expectEqualHexStrings(
- "\xC5\xFB\x10\x0D\x10\x00\x00\x00",
- emit.lowered(),
- "vmovsd xmm1, qword ptr [rip + 0x10]",
- );
-}
-
-test "lower to RVM encoding" {
- var emit = TestEmit.init();
- defer emit.deinit();
- try lowerToRvmEnc(.vaddsd, .xmm0, .xmm1, RegisterOrMemory.reg(.xmm2), emit.code());
- try expectEqualHexStrings("\xC5\xF3\x58\xC2", emit.lowered(), "vaddsd xmm0, xmm1, xmm2");
- try lowerToRvmEnc(.vaddsd, .xmm0, .xmm0, RegisterOrMemory.reg(.xmm1), emit.code());
- try expectEqualHexStrings("\xC5\xFB\x58\xC1", emit.lowered(), "vaddsd xmm0, xmm0, xmm1");
-}
src/arch/x86_64/encoder.zig
@@ -0,0 +1,794 @@
+const std = @import("std");
+const assert = std.debug.assert;
+const math = std.math;
+
+const bits = @import("bits.zig");
+const Encoding = @import("Encoding.zig");
+const Memory = bits.Memory;
+const Moffs = bits.Moffs;
+const PtrSize = bits.PtrSize;
+const Register = bits.Register;
+
+pub const Instruction = struct {
+ op1: Operand = .none,
+ op2: Operand = .none,
+ op3: Operand = .none,
+ op4: Operand = .none,
+ encoding: Encoding,
+
+ pub const Mnemonic = Encoding.Mnemonic;
+
+ pub const Operand = union(enum) {
+ none,
+ reg: Register,
+ mem: Memory,
+ imm: i64,
+
+ /// Returns the bitsize of the operand.
+ /// Asserts the operand is either register or memory.
+ pub fn size(op: Operand) u64 {
+ return switch (op) {
+ .none => unreachable,
+ .reg => |reg| reg.size(),
+ .mem => |mem| mem.size(),
+ .imm => unreachable,
+ };
+ }
+
+ /// Returns true if the operand is a segment register.
+ /// Asserts the operand is either register or memory.
+ pub fn isSegmentRegister(op: Operand) bool {
+ return switch (op) {
+ .none => unreachable,
+ .reg => |reg| reg.class() == .segment,
+ .mem => |mem| mem.isSegmentRegister(),
+ .imm => unreachable,
+ };
+ }
+
+ pub fn fmtPrint(op: Operand, enc_op: Encoding.Op, writer: anytype) !void {
+ switch (op) {
+ .none => {},
+ .reg => |reg| try writer.writeAll(@tagName(reg)),
+ .mem => |mem| switch (mem) {
+ .rip => |rip| {
+ try writer.print("{s} ptr [rip", .{@tagName(rip.ptr_size)});
+ if (rip.disp != 0) {
+ const sign_bit = if (sign(rip.disp) < 0) "-" else "+";
+ const disp_abs = try std.math.absInt(rip.disp);
+ try writer.print(" {s} 0x{x}", .{ sign_bit, disp_abs });
+ }
+ try writer.writeByte(']');
+ },
+ .sib => |sib| {
+ try writer.print("{s} ptr ", .{@tagName(sib.ptr_size)});
+
+ if (mem.isSegmentRegister()) {
+ return writer.print("{s}:0x{x}", .{ @tagName(sib.base.?), sib.disp });
+ }
+
+ try writer.writeByte('[');
+
+ if (sib.base) |base| {
+ try writer.print("{s}", .{@tagName(base)});
+ }
+ if (sib.scale_index) |si| {
+ if (sib.base != null) {
+ try writer.writeAll(" + ");
+ }
+ try writer.print("{s} * {d}", .{ @tagName(si.index), si.scale });
+ }
+ if (sib.disp != 0) {
+ if (sib.base != null or sib.scale_index != null) {
+ try writer.writeByte(' ');
+ }
+ try writer.writeByte(if (sign(sib.disp) < 0) '-' else '+');
+ const disp_abs = try std.math.absInt(sib.disp);
+ try writer.print(" 0x{x}", .{disp_abs});
+ }
+
+ try writer.writeByte(']');
+ },
+ .moffs => |moffs| try writer.print("{s}:0x{x}", .{ @tagName(moffs.seg), moffs.offset }),
+ },
+ .imm => |imm| {
+ if (enc_op == .imm64) {
+ return writer.print("0x{x}", .{@bitCast(u64, imm)});
+ }
+ const imm_abs = try std.math.absInt(imm);
+ if (sign(imm) < 0) {
+ try writer.writeByte('-');
+ }
+ try writer.print("0x{x}", .{imm_abs});
+ },
+ }
+ }
+ };
+
+ pub fn new(mnemonic: Mnemonic, args: struct {
+ op1: Operand = .none,
+ op2: Operand = .none,
+ op3: Operand = .none,
+ op4: Operand = .none,
+ }) !Instruction {
+ const encoding = Encoding.findByMnemonic(mnemonic, .{
+ .op1 = args.op1,
+ .op2 = args.op2,
+ .op3 = args.op3,
+ .op4 = args.op4,
+ }) orelse return error.InvalidInstruction;
+ std.log.debug("{}", .{encoding});
+ return .{
+ .op1 = args.op1,
+ .op2 = args.op2,
+ .op3 = args.op3,
+ .op4 = args.op4,
+ .encoding = encoding,
+ };
+ }
+
+ pub fn fmtPrint(inst: Instruction, writer: anytype) !void {
+ try writer.print("{s}", .{@tagName(inst.encoding.mnemonic)});
+ const ops = [_]struct { Operand, Encoding.Op }{
+ .{ inst.op1, inst.encoding.op1 },
+ .{ inst.op2, inst.encoding.op2 },
+ .{ inst.op3, inst.encoding.op3 },
+ .{ inst.op4, inst.encoding.op4 },
+ };
+ for (&ops, 0..) |op, i| {
+ if (op[0] == .none) break;
+ if (i > 0) {
+ try writer.writeByte(',');
+ }
+ try writer.writeByte(' ');
+ try op[0].fmtPrint(op[1], writer);
+ }
+ }
+
+ pub fn encode(inst: Instruction, writer: anytype) !void {
+ const encoder = Encoder(@TypeOf(writer)){ .writer = writer };
+ const encoding = inst.encoding;
+
+ try inst.encodeLegacyPrefixes(encoder);
+ try inst.encodeMandatoryPrefix(encoder);
+ try inst.encodeRexPrefix(encoder);
+ try inst.encodeOpcode(encoder);
+
+ switch (encoding.op_en) {
+ .np, .o => {},
+ .i, .d => try encodeImm(inst.op1.imm, encoding.op1, encoder),
+ .zi, .oi => try encodeImm(inst.op2.imm, encoding.op2, encoder),
+ .fd => try encoder.imm64(inst.op2.mem.moffs.offset),
+ .td => try encoder.imm64(inst.op1.mem.moffs.offset),
+ else => {
+ const mem_op = switch (encoding.op_en) {
+ .m, .mi, .m1, .mc, .mr => inst.op1,
+ .rm, .rmi => inst.op2,
+ else => unreachable,
+ };
+ switch (mem_op) {
+ .reg => |reg| {
+ const rm = switch (encoding.op_en) {
+ .m, .mi, .m1, .mc => encoding.modRmExt(),
+ .mr => inst.op2.reg.lowEnc(),
+ .rm, .rmi => inst.op1.reg.lowEnc(),
+ else => unreachable,
+ };
+ try encoder.modRm_direct(rm, reg.lowEnc());
+ },
+ .mem => |mem| {
+ const op = switch (encoding.op_en) {
+ .m, .mi, .m1, .mc => .none,
+ .mr => inst.op2,
+ .rm, .rmi => inst.op1,
+ else => unreachable,
+ };
+ try encodeMemory(encoding, mem, op, encoder);
+ },
+ else => unreachable,
+ }
+
+ switch (encoding.op_en) {
+ .mi => try encodeImm(inst.op2.imm, encoding.op2, encoder),
+ .rmi => try encodeImm(inst.op3.imm, encoding.op3, encoder),
+ else => {},
+ }
+ },
+ }
+ }
+
+ fn encodeOpcode(inst: Instruction, encoder: anytype) !void {
+ const opcode = inst.encoding.opcode();
+ switch (inst.encoding.op_en) {
+ .o, .oi => try encoder.opcode_withReg(opcode[0], inst.op1.reg.lowEnc()),
+ else => {
+ const index: usize = if (inst.encoding.mandatoryPrefix()) |_| 1 else 0;
+ for (opcode[index..]) |byte| {
+ try encoder.opcode_1byte(byte);
+ }
+ },
+ }
+ }
+
+ fn encodeLegacyPrefixes(inst: Instruction, encoder: anytype) !void {
+ const enc = inst.encoding;
+ const op_en = enc.op_en;
+
+ var legacy = LegacyPrefixes{};
+ if (enc.mode == .none) {
+ const bit_size = enc.operandSize();
+ if (bit_size == 16) {
+ legacy.set16BitOverride();
+ }
+ }
+
+ const segment_override: ?Register = switch (op_en) {
+ .i, .zi, .o, .oi, .d, .np => null,
+ .fd => inst.op2.mem.base().?,
+ .td => inst.op1.mem.base().?,
+ .rm, .rmi => if (inst.op2.isSegmentRegister()) blk: {
+ break :blk switch (inst.op2) {
+ .reg => |r| r,
+ .mem => |m| m.base().?,
+ else => unreachable,
+ };
+ } else null,
+ .m, .mi, .m1, .mc, .mr => if (inst.op1.isSegmentRegister()) blk: {
+ break :blk switch (inst.op1) {
+ .reg => |r| r,
+ .mem => |m| m.base().?,
+ else => unreachable,
+ };
+ } else null,
+ };
+ if (segment_override) |seg| {
+ legacy.setSegmentOverride(seg);
+ }
+
+ try encoder.legacyPrefixes(legacy);
+ }
+
+ fn encodeRexPrefix(inst: Instruction, encoder: anytype) !void {
+ const op_en = inst.encoding.op_en;
+
+ // Check if we need REX and can actually encode it
+ const is_rex_invalid = for (&[_]Operand{ inst.op1, inst.op2, inst.op3, inst.op4 }) |op| switch (op) {
+ .reg => |r| if (r.isRexInvalid()) break true,
+ else => {},
+ } else false;
+
+ var rex = Rex{};
+ rex.w = inst.encoding.mode == .long;
+
+ switch (op_en) {
+ .np, .i, .zi, .fd, .td, .d => {},
+ .o, .oi => {
+ rex.b = inst.op1.reg.isExtended();
+ },
+ .m, .mi, .m1, .mc, .mr, .rm, .rmi => {
+ const r_op = switch (op_en) {
+ .rm, .rmi => inst.op1,
+ .mr => inst.op2,
+ else => null,
+ };
+ if (r_op) |op| {
+ rex.r = op.reg.isExtended();
+ }
+
+ const b_x_op = switch (op_en) {
+ .rm, .rmi => inst.op2,
+ .m, .mi, .m1, .mc, .mr => inst.op1,
+ else => unreachable,
+ };
+ switch (b_x_op) {
+ .reg => |r| {
+ rex.b = r.isExtended();
+ },
+ .mem => |mem| {
+ rex.b = if (mem.base()) |base| base.isExtended() else false;
+ rex.x = if (mem.scaleIndex()) |si| si.index.isExtended() else false;
+ },
+ else => unreachable,
+ }
+ },
+ }
+
+ if (rex.isSet() and is_rex_invalid) return error.CannotEncode;
+
+ try encoder.rex(rex);
+ }
+
+ fn encodeMandatoryPrefix(inst: Instruction, encoder: anytype) !void {
+ const prefix = inst.encoding.mandatoryPrefix() orelse return;
+ try encoder.opcode_1byte(prefix);
+ }
+
+ fn encodeMemory(encoding: Encoding, mem: Memory, operand: Operand, encoder: anytype) !void {
+ const operand_enc = switch (operand) {
+ .reg => |reg| reg.lowEnc(),
+ .none => encoding.modRmExt(),
+ else => unreachable,
+ };
+
+ switch (mem) {
+ .moffs => unreachable,
+ .sib => |sib| {
+ if (sib.base) |base| {
+ if (base.class() == .segment) {
+ // TODO audit this wrt SIB
+ try encoder.modRm_SIBDisp0(operand_enc);
+ if (sib.scale_index) |si| {
+ const scale = math.log2_int(u4, si.scale);
+ try encoder.sib_scaleIndexDisp32(scale, si.index.lowEnc());
+ } else {
+ try encoder.sib_disp32();
+ }
+ try encoder.disp32(sib.disp);
+ } else {
+ assert(base.class() == .general_purpose);
+ const dst = base.lowEnc();
+ const src = operand_enc;
+ if (dst == 4 or sib.scale_index != null) {
+ if (sib.disp == 0 and dst != 5) {
+ try encoder.modRm_SIBDisp0(src);
+ if (sib.scale_index) |si| {
+ const scale = math.log2_int(u4, si.scale);
+ try encoder.sib_scaleIndexBase(scale, si.index.lowEnc(), dst);
+ } else {
+ try encoder.sib_base(dst);
+ }
+ } else if (math.cast(i8, sib.disp)) |_| {
+ try encoder.modRm_SIBDisp8(src);
+ if (sib.scale_index) |si| {
+ const scale = math.log2_int(u4, si.scale);
+ try encoder.sib_scaleIndexBaseDisp8(scale, si.index.lowEnc(), dst);
+ } else {
+ try encoder.sib_baseDisp8(dst);
+ }
+ try encoder.disp8(@truncate(i8, sib.disp));
+ } else {
+ try encoder.modRm_SIBDisp32(src);
+ if (sib.scale_index) |si| {
+ const scale = math.log2_int(u4, si.scale);
+ try encoder.sib_scaleIndexBaseDisp32(scale, si.index.lowEnc(), dst);
+ } else {
+ try encoder.sib_baseDisp32(dst);
+ }
+ try encoder.disp32(sib.disp);
+ }
+ } else {
+ if (sib.disp == 0 and dst != 5) {
+ try encoder.modRm_indirectDisp0(src, dst);
+ } else if (math.cast(i8, sib.disp)) |_| {
+ try encoder.modRm_indirectDisp8(src, dst);
+ try encoder.disp8(@truncate(i8, sib.disp));
+ } else {
+ try encoder.modRm_indirectDisp32(src, dst);
+ try encoder.disp32(sib.disp);
+ }
+ }
+ }
+ } else {
+ try encoder.modRm_SIBDisp0(operand_enc);
+ if (sib.scale_index) |si| {
+ const scale = math.log2_int(u4, si.scale);
+ try encoder.sib_scaleIndexDisp32(scale, si.index.lowEnc());
+ } else {
+ try encoder.sib_disp32();
+ }
+ try encoder.disp32(sib.disp);
+ }
+ },
+ .rip => |rip| {
+ try encoder.modRm_RIPDisp32(operand_enc);
+ try encoder.disp32(rip.disp);
+ },
+ }
+ }
+
+ fn encodeImm(imm: i64, kind: Encoding.Op, encoder: anytype) !void {
+ switch (kind) {
+ .imm8, .rel8 => try encoder.imm8(@truncate(i8, imm)),
+ .imm16, .rel16 => try encoder.imm16(@truncate(i16, imm)),
+ .imm32, .rel32 => try encoder.imm32(@truncate(i32, imm)),
+ .imm64 => try encoder.imm64(@bitCast(u64, imm)),
+ else => unreachable,
+ }
+ }
+};
+
+inline fn sign(i: anytype) @TypeOf(i) {
+ return @as(@TypeOf(i), @boolToInt(i > 0)) - @boolToInt(i < 0);
+}
+
+pub const LegacyPrefixes = packed struct {
+ /// LOCK
+ prefix_f0: bool = false,
+ /// REPNZ, REPNE, REP, Scalar Double-precision
+ prefix_f2: bool = false,
+ /// REPZ, REPE, REP, Scalar Single-precision
+ prefix_f3: bool = false,
+
+ /// CS segment override or Branch not taken
+ prefix_2e: bool = false,
+ /// SS segment override
+ prefix_36: bool = false,
+ /// ES segment override
+ prefix_26: bool = false,
+ /// FS segment override
+ prefix_64: bool = false,
+ /// GS segment override
+ prefix_65: bool = false,
+
+ /// Branch taken
+ prefix_3e: bool = false,
+
+ /// Address size override (enables 16 bit address size)
+ prefix_67: bool = false,
+
+ /// Operand size override (enables 16 bit operation)
+ prefix_66: bool = false,
+
+ padding: u5 = 0,
+
+ pub fn setSegmentOverride(self: *LegacyPrefixes, reg: Register) void {
+ assert(reg.class() == .segment);
+ switch (reg) {
+ .cs => self.prefix_2e = true,
+ .ss => self.prefix_36 = true,
+ .es => self.prefix_26 = true,
+ .fs => self.prefix_64 = true,
+ .gs => self.prefix_65 = true,
+ .ds => {},
+ else => unreachable,
+ }
+ }
+
+ pub fn set16BitOverride(self: *LegacyPrefixes) void {
+ self.prefix_66 = true;
+ }
+};
+
+fn Encoder(comptime T: type) type {
+ return struct {
+ writer: T,
+
+ const Self = @This();
+
+ // --------
+ // Prefixes
+ // --------
+
+ /// Encodes legacy prefixes
+ pub fn legacyPrefixes(self: Self, prefixes: LegacyPrefixes) !void {
+ if (@bitCast(u16, prefixes) != 0) {
+ // Hopefully this path isn't taken very often, so we'll do it the slow way for now
+
+ // LOCK
+ if (prefixes.prefix_f0) try self.writer.writeByte(0xf0);
+ // REPNZ, REPNE, REP, Scalar Double-precision
+ if (prefixes.prefix_f2) try self.writer.writeByte(0xf2);
+ // REPZ, REPE, REP, Scalar Single-precision
+ if (prefixes.prefix_f3) try self.writer.writeByte(0xf3);
+
+ // CS segment override or Branch not taken
+ if (prefixes.prefix_2e) try self.writer.writeByte(0x2e);
+ // DS segment override
+ if (prefixes.prefix_36) try self.writer.writeByte(0x36);
+ // ES segment override
+ if (prefixes.prefix_26) try self.writer.writeByte(0x26);
+ // FS segment override
+ if (prefixes.prefix_64) try self.writer.writeByte(0x64);
+ // GS segment override
+ if (prefixes.prefix_65) try self.writer.writeByte(0x65);
+
+ // Branch taken
+ if (prefixes.prefix_3e) try self.writer.writeByte(0x3e);
+
+ // Operand size override
+ if (prefixes.prefix_66) try self.writer.writeByte(0x66);
+
+ // Address size override
+ if (prefixes.prefix_67) try self.writer.writeByte(0x67);
+ }
+ }
+
+ /// Use 16 bit operand size
+ ///
+ /// Note that this flag is overridden by REX.W, if both are present.
+ pub fn prefix16BitMode(self: Self) !void {
+ try self.writer.writeByte(0x66);
+ }
+
+ /// Encodes a REX prefix byte given all the fields
+ ///
+ /// Use this byte whenever you need 64 bit operation,
+ /// or one of reg, index, r/m, base, or opcode-reg might be extended.
+ ///
+ /// See struct `Rex` for a description of each field.
+ ///
+ /// Does not add a prefix byte if none of the fields are set!
+ pub fn rex(self: Self, byte: Rex) !void {
+ var value: u8 = 0b0100_0000;
+
+ if (byte.w) value |= 0b1000;
+ if (byte.r) value |= 0b0100;
+ if (byte.x) value |= 0b0010;
+ if (byte.b) value |= 0b0001;
+
+ if (value != 0b0100_0000) {
+ try self.writer.writeByte(value);
+ }
+ }
+
+ // ------
+ // Opcode
+ // ------
+
+ /// Encodes a 1 byte opcode
+ pub fn opcode_1byte(self: Self, opcode: u8) !void {
+ try self.writer.writeByte(opcode);
+ }
+
+ /// Encodes a 2 byte opcode
+ ///
+ /// e.g. IMUL has the opcode 0x0f 0xaf, so you use
+ ///
+ /// encoder.opcode_2byte(0x0f, 0xaf);
+ pub fn opcode_2byte(self: Self, prefix: u8, opcode: u8) !void {
+ try self.writer.writeAll(&.{ prefix, opcode });
+ }
+
+ /// Encodes a 3 byte opcode
+ ///
+ /// e.g. MOVSD has the opcode 0xf2 0x0f 0x10
+ ///
+ /// encoder.opcode_3byte(0xf2, 0x0f, 0x10);
+ pub fn opcode_3byte(self: Self, prefix_1: u8, prefix_2: u8, opcode: u8) !void {
+ try self.writer.writeAll(&.{ prefix_1, prefix_2, opcode });
+ }
+
+ /// Encodes a 1 byte opcode with a reg field
+ ///
+ /// Remember to add a REX prefix byte if reg is extended!
+ pub fn opcode_withReg(self: Self, opcode: u8, reg: u3) !void {
+ assert(opcode & 0b111 == 0);
+ try self.writer.writeByte(opcode | reg);
+ }
+
+ // ------
+ // ModR/M
+ // ------
+
+ /// Construct a ModR/M byte given all the fields
+ ///
+ /// Remember to add a REX prefix byte if reg or rm are extended!
+ pub fn modRm(self: Self, mod: u2, reg_or_opx: u3, rm: u3) !void {
+ try self.writer.writeByte(@as(u8, mod) << 6 | @as(u8, reg_or_opx) << 3 | rm);
+ }
+
+ /// Construct a ModR/M byte using direct r/m addressing
+ /// r/m effective address: r/m
+ ///
+ /// Note reg's effective address is always just reg for the ModR/M byte.
+ /// Remember to add a REX prefix byte if reg or rm are extended!
+ pub fn modRm_direct(self: Self, reg_or_opx: u3, rm: u3) !void {
+ try self.modRm(0b11, reg_or_opx, rm);
+ }
+
+ /// Construct a ModR/M byte using indirect r/m addressing
+ /// r/m effective address: [r/m]
+ ///
+ /// Note reg's effective address is always just reg for the ModR/M byte.
+ /// Remember to add a REX prefix byte if reg or rm are extended!
+ pub fn modRm_indirectDisp0(self: Self, reg_or_opx: u3, rm: u3) !void {
+ assert(rm != 4 and rm != 5);
+ try self.modRm(0b00, reg_or_opx, rm);
+ }
+
+ /// Construct a ModR/M byte using indirect SIB addressing
+ /// r/m effective address: [SIB]
+ ///
+ /// Note reg's effective address is always just reg for the ModR/M byte.
+ /// Remember to add a REX prefix byte if reg or rm are extended!
+ pub fn modRm_SIBDisp0(self: Self, reg_or_opx: u3) !void {
+ try self.modRm(0b00, reg_or_opx, 0b100);
+ }
+
+ /// Construct a ModR/M byte using RIP-relative addressing
+ /// r/m effective address: [RIP + disp32]
+ ///
+ /// Note reg's effective address is always just reg for the ModR/M byte.
+ /// Remember to add a REX prefix byte if reg or rm are extended!
+ pub fn modRm_RIPDisp32(self: Self, reg_or_opx: u3) !void {
+ try self.modRm(0b00, reg_or_opx, 0b101);
+ }
+
+ /// Construct a ModR/M byte using indirect r/m with a 8bit displacement
+ /// r/m effective address: [r/m + disp8]
+ ///
+ /// Note reg's effective address is always just reg for the ModR/M byte.
+ /// Remember to add a REX prefix byte if reg or rm are extended!
+ pub fn modRm_indirectDisp8(self: Self, reg_or_opx: u3, rm: u3) !void {
+ assert(rm != 4);
+ try self.modRm(0b01, reg_or_opx, rm);
+ }
+
+ /// Construct a ModR/M byte using indirect SIB with a 8bit displacement
+ /// r/m effective address: [SIB + disp8]
+ ///
+ /// Note reg's effective address is always just reg for the ModR/M byte.
+ /// Remember to add a REX prefix byte if reg or rm are extended!
+ pub fn modRm_SIBDisp8(self: Self, reg_or_opx: u3) !void {
+ try self.modRm(0b01, reg_or_opx, 0b100);
+ }
+
+ /// Construct a ModR/M byte using indirect r/m with a 32bit displacement
+ /// r/m effective address: [r/m + disp32]
+ ///
+ /// Note reg's effective address is always just reg for the ModR/M byte.
+ /// Remember to add a REX prefix byte if reg or rm are extended!
+ pub fn modRm_indirectDisp32(self: Self, reg_or_opx: u3, rm: u3) !void {
+ assert(rm != 4);
+ try self.modRm(0b10, reg_or_opx, rm);
+ }
+
+ /// Construct a ModR/M byte using indirect SIB with a 32bit displacement
+ /// r/m effective address: [SIB + disp32]
+ ///
+ /// Note reg's effective address is always just reg for the ModR/M byte.
+ /// Remember to add a REX prefix byte if reg or rm are extended!
+ pub fn modRm_SIBDisp32(self: Self, reg_or_opx: u3) !void {
+ try self.modRm(0b10, reg_or_opx, 0b100);
+ }
+
+ // ---
+ // SIB
+ // ---
+
+ /// Construct a SIB byte given all the fields
+ ///
+ /// Remember to add a REX prefix byte if index or base are extended!
+ pub fn sib(self: Self, scale: u2, index: u3, base: u3) !void {
+ try self.writer.writeByte(@as(u8, scale) << 6 | @as(u8, index) << 3 | base);
+ }
+
+ /// Construct a SIB byte with scale * index + base, no frills.
+ /// r/m effective address: [base + scale * index]
+ ///
+ /// Remember to add a REX prefix byte if index or base are extended!
+ pub fn sib_scaleIndexBase(self: Self, scale: u2, index: u3, base: u3) !void {
+ assert(base != 5);
+
+ try self.sib(scale, index, base);
+ }
+
+ /// Construct a SIB byte with scale * index + disp32
+ /// r/m effective address: [scale * index + disp32]
+ ///
+ /// Remember to add a REX prefix byte if index or base are extended!
+ pub fn sib_scaleIndexDisp32(self: Self, scale: u2, index: u3) !void {
+ // scale is actually ignored
+ // index = 4 means no index if and only if we haven't extended the register
+ // TODO enforce this
+ // base = 5 means no base, if mod == 0.
+ try self.sib(scale, index, 5);
+ }
+
+ /// Construct a SIB byte with just base
+ /// r/m effective address: [base]
+ ///
+ /// Remember to add a REX prefix byte if index or base are extended!
+ pub fn sib_base(self: Self, base: u3) !void {
+ assert(base != 5);
+
+ // scale is actually ignored
+ // index = 4 means no index
+ try self.sib(0, 4, base);
+ }
+
+ /// Construct a SIB byte with just disp32
+ /// r/m effective address: [disp32]
+ ///
+ /// Remember to add a REX prefix byte if index or base are extended!
+ pub fn sib_disp32(self: Self) !void {
+ // scale is actually ignored
+ // index = 4 means no index
+ // base = 5 means no base, if mod == 0.
+ try self.sib(0, 4, 5);
+ }
+
+ /// Construct a SIB byte with scale * index + base + disp8
+ /// r/m effective address: [base + scale * index + disp8]
+ ///
+ /// Remember to add a REX prefix byte if index or base are extended!
+ pub fn sib_scaleIndexBaseDisp8(self: Self, scale: u2, index: u3, base: u3) !void {
+ try self.sib(scale, index, base);
+ }
+
+ /// Construct a SIB byte with base + disp8, no index
+ /// r/m effective address: [base + disp8]
+ ///
+ /// Remember to add a REX prefix byte if index or base are extended!
+ pub fn sib_baseDisp8(self: Self, base: u3) !void {
+ // scale is ignored
+ // index = 4 means no index
+ try self.sib(0, 4, base);
+ }
+
+ /// Construct a SIB byte with scale * index + base + disp32
+ /// r/m effective address: [base + scale * index + disp32]
+ ///
+ /// Remember to add a REX prefix byte if index or base are extended!
+ pub fn sib_scaleIndexBaseDisp32(self: Self, scale: u2, index: u3, base: u3) !void {
+ try self.sib(scale, index, base);
+ }
+
+ /// Construct a SIB byte with base + disp32, no index
+ /// r/m effective address: [base + disp32]
+ ///
+ /// Remember to add a REX prefix byte if index or base are extended!
+ pub fn sib_baseDisp32(self: Self, base: u3) !void {
+ // scale is ignored
+ // index = 4 means no index
+ try self.sib(0, 4, base);
+ }
+
+ // -------------------------
+ // Trivial (no bit fiddling)
+ // -------------------------
+
+ /// Encode an 8 bit immediate
+ ///
+ /// It is sign-extended to 64 bits by the cpu.
+ pub fn imm8(self: Self, imm: i8) !void {
+ try self.writer.writeByte(@bitCast(u8, imm));
+ }
+
+ /// Encode an 8 bit displacement
+ ///
+ /// It is sign-extended to 64 bits by the cpu.
+ pub fn disp8(self: Self, disp: i8) !void {
+ try self.writer.writeByte(@bitCast(u8, disp));
+ }
+
+ /// Encode an 16 bit immediate
+ ///
+ /// It is sign-extended to 64 bits by the cpu.
+ pub fn imm16(self: Self, imm: i16) !void {
+ try self.writer.writeIntLittle(i16, imm);
+ }
+
+ /// Encode an 32 bit immediate
+ ///
+ /// It is sign-extended to 64 bits by the cpu.
+ pub fn imm32(self: Self, imm: i32) !void {
+ try self.writer.writeIntLittle(i32, imm);
+ }
+
+ /// Encode an 32 bit displacement
+ ///
+ /// It is sign-extended to 64 bits by the cpu.
+ pub fn disp32(self: Self, disp: i32) !void {
+ try self.writer.writeIntLittle(i32, disp);
+ }
+
+ /// Encode an 64 bit immediate
+ ///
+ /// It is sign-extended to 64 bits by the cpu.
+ pub fn imm64(self: Self, imm: u64) !void {
+ try self.writer.writeIntLittle(u64, imm);
+ }
+ };
+}
+
+pub const Rex = struct {
+ w: bool = false,
+ r: bool = false,
+ x: bool = false,
+ b: bool = false,
+
+ pub fn isSet(rex: Rex) bool {
+ return rex.w or rex.r or rex.x or rex.b;
+ }
+};
src/arch/x86_64/Encoding.zig
@@ -0,0 +1,521 @@
+const Encoding = @This();
+
+const std = @import("std");
+const assert = std.debug.assert;
+const math = std.math;
+
+const bits = @import("bits.zig");
+const encoder = @import("encoder.zig");
+const Instruction = encoder.Instruction;
+const Register = bits.Register;
+const Rex = encoder.Rex;
+const LegacyPrefixes = encoder.LegacyPrefixes;
+
+const table = @import("encodings.zig").table;
+
+mnemonic: Mnemonic,
+op_en: OpEn,
+op1: Op,
+op2: Op,
+op3: Op,
+op4: Op,
+opc_len: u2,
+opc: [3]u8,
+modrm_ext: u3,
+mode: Mode,
+
+pub fn findByMnemonic(mnemonic: Mnemonic, args: struct {
+ op1: Instruction.Operand,
+ op2: Instruction.Operand,
+ op3: Instruction.Operand,
+ op4: Instruction.Operand,
+}) ?Encoding {
+ const input_op1 = Op.fromOperand(args.op1);
+ const input_op2 = Op.fromOperand(args.op2);
+ const input_op3 = Op.fromOperand(args.op3);
+ const input_op4 = Op.fromOperand(args.op4);
+
+ // TODO work out what is the maximum number of variants we can actually find in one swoop.
+ var candidates: [10]Encoding = undefined;
+ var count: usize = 0;
+ inline for (table) |entry| {
+ const enc = Encoding{
+ .mnemonic = entry[0],
+ .op_en = entry[1],
+ .op1 = entry[2],
+ .op2 = entry[3],
+ .op3 = entry[4],
+ .op4 = entry[5],
+ .opc_len = entry[6],
+ .opc = .{ entry[7], entry[8], entry[9] },
+ .modrm_ext = entry[10],
+ .mode = entry[11],
+ };
+ if (enc.mnemonic == mnemonic and
+ input_op1.isSubset(enc.op1, enc.mode) and
+ input_op2.isSubset(enc.op2, enc.mode) and
+ input_op3.isSubset(enc.op3, enc.mode) and
+ input_op4.isSubset(enc.op4, enc.mode))
+ {
+ candidates[count] = enc;
+ count += 1;
+ }
+ }
+
+ if (count == 0) return null;
+ if (count == 1) return candidates[0];
+
+ const EncodingLength = struct {
+ fn estimate(encoding: Encoding, params: struct {
+ op1: Instruction.Operand,
+ op2: Instruction.Operand,
+ op3: Instruction.Operand,
+ op4: Instruction.Operand,
+ }) usize {
+ var inst = Instruction{
+ .op1 = params.op1,
+ .op2 = params.op2,
+ .op3 = params.op3,
+ .op4 = params.op4,
+ .encoding = encoding,
+ };
+ var cwriter = std.io.countingWriter(std.io.null_writer);
+ inst.encode(cwriter.writer()) catch unreachable;
+ return cwriter.bytes_written;
+ }
+ };
+
+ var shortest_encoding: ?struct {
+ index: usize,
+ len: usize,
+ } = null;
+ var i: usize = 0;
+ while (i < count) : (i += 1) {
+ const len = EncodingLength.estimate(candidates[i], .{
+ .op1 = args.op1,
+ .op2 = args.op2,
+ .op3 = args.op3,
+ .op4 = args.op4,
+ });
+ const current = shortest_encoding orelse {
+ shortest_encoding = .{ .index = i, .len = len };
+ continue;
+ };
+ if (len < current.len) {
+ shortest_encoding = .{ .index = i, .len = len };
+ }
+ }
+
+ return candidates[shortest_encoding.?.index];
+}
+
+/// Returns first matching encoding by opcode.
+pub fn findByOpcode(opc: []const u8, prefixes: struct {
+ legacy: LegacyPrefixes,
+ rex: Rex,
+}, modrm_ext: ?u3) ?Encoding {
+ inline for (table) |entry| {
+ const enc = Encoding{
+ .mnemonic = entry[0],
+ .op_en = entry[1],
+ .op1 = entry[2],
+ .op2 = entry[3],
+ .op3 = entry[4],
+ .op4 = entry[5],
+ .opc_len = entry[6],
+ .opc = .{ entry[7], entry[8], entry[9] },
+ .modrm_ext = entry[10],
+ .mode = entry[11],
+ };
+ const match = match: {
+ if (modrm_ext) |ext| {
+ break :match ext == enc.modrm_ext and std.mem.eql(u8, enc.opcode(), opc);
+ }
+ break :match std.mem.eql(u8, enc.opcode(), opc);
+ };
+ if (match) {
+ if (prefixes.rex.w) {
+ switch (enc.mode) {
+ .fpu, .sse, .sse2 => {},
+ .long => return enc,
+ .none => {
+ // TODO this is a hack to allow parsing of instructions which contain
+ // spurious prefix bytes such as
+ // rex.W mov dil, 0x1
+ // Here, rex.W is not needed.
+ const rex_w_allowed = blk: {
+ const bit_size = enc.operandSize();
+ break :blk bit_size == 64 or bit_size == 8;
+ };
+ if (rex_w_allowed) return enc;
+ },
+ }
+ } else if (prefixes.legacy.prefix_66) {
+ switch (enc.operandSize()) {
+ 16 => return enc,
+ else => {},
+ }
+ } else {
+ if (enc.mode == .none) {
+ switch (enc.operandSize()) {
+ 16 => {},
+ else => return enc,
+ }
+ }
+ }
+ }
+ }
+ return null;
+}
+
+pub fn opcode(encoding: *const Encoding) []const u8 {
+ return encoding.opc[0..encoding.opc_len];
+}
+
+pub fn mandatoryPrefix(encoding: *const Encoding) ?u8 {
+ const prefix = encoding.opc[0];
+ return switch (prefix) {
+ 0x66, 0xf2, 0xf3 => prefix,
+ else => null,
+ };
+}
+
+pub fn modRmExt(encoding: Encoding) u3 {
+ return switch (encoding.op_en) {
+ .m, .mi, .m1, .mc => encoding.modrm_ext,
+ else => unreachable,
+ };
+}
+
+pub fn operandSize(encoding: Encoding) u32 {
+ if (encoding.mode == .long) return 64;
+ const bit_size: u32 = switch (encoding.op_en) {
+ .np => switch (encoding.op1) {
+ .o16 => 16,
+ .o32 => 32,
+ .o64 => 64,
+ else => 32,
+ },
+ .td => encoding.op2.size(),
+ else => encoding.op1.size(),
+ };
+ return bit_size;
+}
+
+pub fn format(
+ encoding: Encoding,
+ comptime fmt: []const u8,
+ options: std.fmt.FormatOptions,
+ writer: anytype,
+) !void {
+ _ = options;
+ _ = fmt;
+ switch (encoding.mode) {
+ .long => try writer.writeAll("REX.W + "),
+ else => {},
+ }
+
+ for (encoding.opcode()) |byte| {
+ try writer.print("{x:0>2} ", .{byte});
+ }
+
+ switch (encoding.op_en) {
+ .np, .fd, .td, .i, .zi, .d => {},
+ .o, .oi => {
+ const tag = switch (encoding.op1) {
+ .r8 => "rb",
+ .r16 => "rw",
+ .r32 => "rd",
+ .r64 => "rd",
+ else => unreachable,
+ };
+ try writer.print("+{s} ", .{tag});
+ },
+ .m, .mi, .m1, .mc => try writer.print("/{d} ", .{encoding.modRmExt()}),
+ .mr, .rm, .rmi => try writer.writeAll("/r "),
+ }
+
+ switch (encoding.op_en) {
+ .i, .d, .zi, .oi, .mi, .rmi => {
+ const op = switch (encoding.op_en) {
+ .i, .d => encoding.op1,
+ .zi, .oi, .mi => encoding.op2,
+ .rmi => encoding.op3,
+ else => unreachable,
+ };
+ const tag = switch (op) {
+ .imm8 => "ib",
+ .imm16 => "iw",
+ .imm32 => "id",
+ .imm64 => "io",
+ .rel8 => "cb",
+ .rel16 => "cw",
+ .rel32 => "cd",
+ else => unreachable,
+ };
+ try writer.print("{s} ", .{tag});
+ },
+ .np, .fd, .td, .o, .m, .m1, .mc, .mr, .rm => {},
+ }
+
+ try writer.print("{s} ", .{@tagName(encoding.mnemonic)});
+
+ const ops = &[_]Op{ encoding.op1, encoding.op2, encoding.op3, encoding.op4 };
+ for (ops) |op| switch (op) {
+ .none, .o16, .o32, .o64 => break,
+ else => try writer.print("{s} ", .{@tagName(op)}),
+ };
+
+ const op_en = switch (encoding.op_en) {
+ .zi => .i,
+ else => |op_en| op_en,
+ };
+ try writer.print("{s}", .{@tagName(op_en)});
+}
+
+pub const Mnemonic = enum {
+ // zig fmt: off
+ // General-purpose
+ adc, add, @"and",
+ call, cbw, cwde, cdqe, cwd, cdq, cqo, cmp,
+ cmova, cmovae, cmovb, cmovbe, cmovc, cmove, cmovg, cmovge, cmovl, cmovle, cmovna,
+ cmovnae, cmovnb, cmovnbe, cmovnc, cmovne, cmovng, cmovnge, cmovnl, cmovnle, cmovno,
+ cmovnp, cmovns, cmovnz, cmovo, cmovp, cmovpe, cmovpo, cmovs, cmovz,
+ div,
+ fisttp, fld,
+ idiv, imul, int3,
+ ja, jae, jb, jbe, jc, jrcxz, je, jg, jge, jl, jle, jna, jnae, jnb, jnbe,
+ jnc, jne, jng, jnge, jnl, jnle, jno, jnp, jns, jnz, jo, jp, jpe, jpo, js, jz,
+ jmp,
+ lea,
+ mov, movsx, movsxd, movzx, mul,
+ nop,
+ @"or",
+ pop, push,
+ ret,
+ sal, sar, sbb, shl, shr, sub, syscall,
+ seta, setae, setb, setbe, setc, sete, setg, setge, setl, setle, setna, setnae,
+ setnb, setnbe, setnc, setne, setng, setnge, setnl, setnle, setno, setnp, setns,
+ setnz, seto, setp, setpe, setpo, sets, setz,
+ @"test",
+ ud2,
+ xor,
+ // SSE
+ addss,
+ cmpss,
+ movss,
+ ucomiss,
+ // SSE2
+ addsd,
+ cmpsd,
+ movq, movsd,
+ ucomisd,
+ // zig fmt: on
+};
+
+pub const OpEn = enum {
+ // zig fmt: off
+ np,
+ o, oi,
+ i, zi,
+ d, m,
+ fd, td,
+ m1, mc, mi, mr, rm, rmi,
+ // zig fmt: on
+};
+
+pub const Op = enum {
+ // zig fmt: off
+ none,
+ o16, o32, o64,
+ unity,
+ imm8, imm16, imm32, imm64,
+ al, ax, eax, rax,
+ cl,
+ r8, r16, r32, r64,
+ rm8, rm16, rm32, rm64,
+ m8, m16, m32, m64, m80,
+ rel8, rel16, rel32,
+ m,
+ moffs,
+ sreg,
+ xmm, xmm_m32, xmm_m64,
+ // zig fmt: on
+
+ pub fn fromOperand(operand: Instruction.Operand) Op {
+ switch (operand) {
+ .none => return .none,
+
+ .reg => |reg| {
+ switch (reg.class()) {
+ .segment => return .sreg,
+ .floating_point => return switch (reg.size()) {
+ 128 => .xmm,
+ else => unreachable,
+ },
+ .general_purpose => {
+ if (reg.to64() == .rax) return switch (reg) {
+ .al => .al,
+ .ax => .ax,
+ .eax => .eax,
+ .rax => .rax,
+ else => unreachable,
+ };
+ if (reg == .cl) return .cl;
+ return switch (reg.size()) {
+ 8 => .r8,
+ 16 => .r16,
+ 32 => .r32,
+ 64 => .r64,
+ else => unreachable,
+ };
+ },
+ }
+ },
+
+ .mem => |mem| switch (mem) {
+ .moffs => return .moffs,
+ .sib, .rip => {
+ const bit_size = mem.size();
+ return switch (bit_size) {
+ 8 => .m8,
+ 16 => .m16,
+ 32 => .m32,
+ 64 => .m64,
+ 80 => .m80,
+ else => unreachable,
+ };
+ },
+ },
+
+ .imm => |imm| {
+ if (imm == 1) return .unity;
+ if (math.cast(i8, imm)) |_| return .imm8;
+ if (math.cast(i16, imm)) |_| return .imm16;
+ if (math.cast(i32, imm)) |_| return .imm32;
+ return .imm64;
+ },
+ }
+ }
+
+ pub fn size(op: Op) u32 {
+ return switch (op) {
+ .none, .o16, .o32, .o64, .moffs, .m, .sreg, .unity => unreachable,
+ .imm8, .al, .cl, .r8, .m8, .rm8, .rel8 => 8,
+ .imm16, .ax, .r16, .m16, .rm16, .rel16 => 16,
+ .imm32, .eax, .r32, .m32, .rm32, .rel32, .xmm_m32 => 32,
+ .imm64, .rax, .r64, .m64, .rm64, .xmm_m64 => 64,
+ .m80 => 80,
+ .xmm => 128,
+ };
+ }
+
+ pub fn isRegister(op: Op) bool {
+ // zig fmt: off
+ return switch (op) {
+ .cl,
+ .al, .ax, .eax, .rax,
+ .r8, .r16, .r32, .r64,
+ .rm8, .rm16, .rm32, .rm64,
+ .xmm, .xmm_m32, .xmm_m64,
+ => true,
+ else => false,
+ };
+ // zig fmt: on
+ }
+
+ pub fn isImmediate(op: Op) bool {
+ // zig fmt: off
+ return switch (op) {
+ .imm8, .imm16, .imm32, .imm64,
+ .rel8, .rel16, .rel32,
+ .unity,
+ => true,
+ else => false,
+ };
+ // zig fmt: on
+ }
+
+ pub fn isMemory(op: Op) bool {
+ // zig fmt: off
+ return switch (op) {
+ .rm8, .rm16, .rm32, .rm64,
+ .m8, .m16, .m32, .m64, .m80,
+ .m,
+ .xmm_m32, .xmm_m64,
+ => true,
+ else => false,
+ };
+ // zig fmt: on
+ }
+
+ pub fn isSegmentRegister(op: Op) bool {
+ return switch (op) {
+ .moffs, .sreg => true,
+ else => false,
+ };
+ }
+
+ pub fn isFloatingPointRegister(op: Op) bool {
+ return switch (op) {
+ .xmm, .xmm_m32, .xmm_m64 => true,
+ else => false,
+ };
+ }
+
+ /// Given an operand `op` checks if `target` is a subset for the purposes
+ /// of the encoding.
+ pub fn isSubset(op: Op, target: Op, mode: Mode) bool {
+ switch (op) {
+ .m, .o16, .o32, .o64 => unreachable,
+ .moffs, .sreg => return op == target,
+ .none => switch (target) {
+ .o16, .o32, .o64, .none => return true,
+ else => return false,
+ },
+ else => {
+ if (op.isRegister() and target.isRegister()) {
+ switch (mode) {
+ .sse, .sse2 => return op.isFloatingPointRegister() and target.isFloatingPointRegister(),
+ else => switch (target) {
+ .cl, .al, .ax, .eax, .rax => return op == target,
+ else => return op.size() == target.size(),
+ },
+ }
+ }
+ if (op.isMemory() and target.isMemory()) {
+ switch (target) {
+ .m => return true,
+ else => return op.size() == target.size(),
+ }
+ }
+ if (op.isImmediate() and target.isImmediate()) {
+ switch (target) {
+ .imm32, .rel32 => switch (op) {
+ .unity, .imm8, .imm16, .imm32 => return true,
+ else => return op == target,
+ },
+ .imm16, .rel16 => switch (op) {
+ .unity, .imm8, .imm16 => return true,
+ else => return op == target,
+ },
+ .imm8, .rel8 => switch (op) {
+ .unity, .imm8 => return true,
+ else => return op == target,
+ },
+ else => return op == target,
+ }
+ }
+ return false;
+ },
+ }
+ }
+};
+
+pub const Mode = enum {
+ none,
+ fpu,
+ long,
+ sse,
+ sse2,
+};
src/arch/x86_64/encodings.zig
@@ -0,0 +1,542 @@
+const Encoding = @import("Encoding.zig");
+const Mnemonic = Encoding.Mnemonic;
+const OpEn = Encoding.OpEn;
+const Op = Encoding.Op;
+const Mode = Encoding.Mode;
+
+const opcode_len = u2;
+const modrm_ext = u3;
+
+const Entry = struct { Mnemonic, OpEn, Op, Op, Op, Op, opcode_len, u8, u8, u8, modrm_ext, Mode };
+
+// TODO move this into a .zon file when Zig is capable of importing .zon files
+// zig fmt: off
+pub const table = &[_]Entry{
+ // General-purpose
+ .{ .adc, .zi, .al, .imm8, .none, .none, 1, 0x14, 0x00, 0x00, 0, .none },
+ .{ .adc, .zi, .ax, .imm16, .none, .none, 1, 0x15, 0x00, 0x00, 0, .none },
+ .{ .adc, .zi, .eax, .imm32, .none, .none, 1, 0x15, 0x00, 0x00, 0, .none },
+ .{ .adc, .zi, .rax, .imm32, .none, .none, 1, 0x15, 0x00, 0x00, 0, .long },
+ .{ .adc, .mi, .rm8, .imm8, .none, .none, 1, 0x80, 0x00, 0x00, 2, .none },
+ .{ .adc, .mi, .rm16, .imm16, .none, .none, 1, 0x81, 0x00, 0x00, 2, .none },
+ .{ .adc, .mi, .rm32, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 2, .none },
+ .{ .adc, .mi, .rm64, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 2, .long },
+ .{ .adc, .mi, .rm16, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 2, .none },
+ .{ .adc, .mi, .rm32, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 2, .none },
+ .{ .adc, .mi, .rm64, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 2, .long },
+ .{ .adc, .mr, .rm8, .r8, .none, .none, 1, 0x10, 0x00, 0x00, 0, .none },
+ .{ .adc, .mr, .rm16, .r16, .none, .none, 1, 0x11, 0x00, 0x00, 0, .none },
+ .{ .adc, .mr, .rm32, .r32, .none, .none, 1, 0x11, 0x00, 0x00, 0, .none },
+ .{ .adc, .mr, .rm64, .r64, .none, .none, 1, 0x11, 0x00, 0x00, 0, .long },
+ .{ .adc, .rm, .r8, .rm8, .none, .none, 1, 0x12, 0x00, 0x00, 0, .none },
+ .{ .adc, .rm, .r16, .rm16, .none, .none, 1, 0x13, 0x00, 0x00, 0, .none },
+ .{ .adc, .rm, .r32, .rm32, .none, .none, 1, 0x13, 0x00, 0x00, 0, .none },
+ .{ .adc, .rm, .r64, .rm64, .none, .none, 1, 0x13, 0x00, 0x00, 0, .long },
+
+ .{ .add, .zi, .al, .imm8, .none, .none, 1, 0x04, 0x00, 0x00, 0, .none },
+ .{ .add, .zi, .ax, .imm16, .none, .none, 1, 0x05, 0x00, 0x00, 0, .none },
+ .{ .add, .zi, .eax, .imm32, .none, .none, 1, 0x05, 0x00, 0x00, 0, .none },
+ .{ .add, .zi, .rax, .imm32, .none, .none, 1, 0x05, 0x00, 0x00, 0, .long },
+ .{ .add, .mi, .rm8, .imm8, .none, .none, 1, 0x80, 0x00, 0x00, 0, .none },
+ .{ .add, .mi, .rm16, .imm16, .none, .none, 1, 0x81, 0x00, 0x00, 0, .none },
+ .{ .add, .mi, .rm32, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 0, .none },
+ .{ .add, .mi, .rm64, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 0, .long },
+ .{ .add, .mi, .rm16, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 0, .none },
+ .{ .add, .mi, .rm32, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 0, .none },
+ .{ .add, .mi, .rm64, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 0, .long },
+ .{ .add, .mr, .rm8, .r8, .none, .none, 1, 0x00, 0x00, 0x00, 0, .none },
+ .{ .add, .mr, .rm16, .r16, .none, .none, 1, 0x01, 0x00, 0x00, 0, .none },
+ .{ .add, .mr, .rm32, .r32, .none, .none, 1, 0x01, 0x00, 0x00, 0, .none },
+ .{ .add, .mr, .rm64, .r64, .none, .none, 1, 0x01, 0x00, 0x00, 0, .long },
+ .{ .add, .rm, .r8, .rm8, .none, .none, 1, 0x02, 0x00, 0x00, 0, .none },
+ .{ .add, .rm, .r16, .rm16, .none, .none, 1, 0x03, 0x00, 0x00, 0, .none },
+ .{ .add, .rm, .r32, .rm32, .none, .none, 1, 0x03, 0x00, 0x00, 0, .none },
+ .{ .add, .rm, .r64, .rm64, .none, .none, 1, 0x03, 0x00, 0x00, 0, .long },
+
+ .{ .@"and", .zi, .al, .imm8, .none, .none, 1, 0x24, 0x00, 0x00, 0, .none },
+ .{ .@"and", .zi, .ax, .imm16, .none, .none, 1, 0x25, 0x00, 0x00, 0, .none },
+ .{ .@"and", .zi, .eax, .imm32, .none, .none, 1, 0x25, 0x00, 0x00, 0, .none },
+ .{ .@"and", .zi, .rax, .imm32, .none, .none, 1, 0x25, 0x00, 0x00, 0, .long },
+ .{ .@"and", .mi, .rm8, .imm8, .none, .none, 1, 0x80, 0x00, 0x00, 4, .none },
+ .{ .@"and", .mi, .rm16, .imm16, .none, .none, 1, 0x81, 0x00, 0x00, 4, .none },
+ .{ .@"and", .mi, .rm32, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 4, .none },
+ .{ .@"and", .mi, .rm64, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 4, .long },
+ .{ .@"and", .mi, .rm16, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 4, .none },
+ .{ .@"and", .mi, .rm32, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 4, .none },
+ .{ .@"and", .mi, .rm64, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 4, .long },
+ .{ .@"and", .mr, .rm8, .r8, .none, .none, 1, 0x20, 0x00, 0x00, 0, .none },
+ .{ .@"and", .mr, .rm16, .r16, .none, .none, 1, 0x21, 0x00, 0x00, 0, .none },
+ .{ .@"and", .mr, .rm32, .r32, .none, .none, 1, 0x21, 0x00, 0x00, 0, .none },
+ .{ .@"and", .mr, .rm64, .r64, .none, .none, 1, 0x21, 0x00, 0x00, 0, .long },
+ .{ .@"and", .rm, .r8, .rm8, .none, .none, 1, 0x22, 0x00, 0x00, 0, .none },
+ .{ .@"and", .rm, .r16, .rm16, .none, .none, 1, 0x23, 0x00, 0x00, 0, .none },
+ .{ .@"and", .rm, .r32, .rm32, .none, .none, 1, 0x23, 0x00, 0x00, 0, .none },
+ .{ .@"and", .rm, .r64, .rm64, .none, .none, 1, 0x23, 0x00, 0x00, 0, .long },
+
+ // This is M encoding according to Intel, but D makes more sense here.
+ .{ .call, .d, .rel32, .none, .none, .none, 1, 0xe8, 0x00, 0x00, 0, .none },
+ .{ .call, .m, .rm64, .none, .none, .none, 1, 0xff, 0x00, 0x00, 2, .none },
+
+ .{ .cbw, .np, .o16, .none, .none, .none, 1, 0x98, 0x00, 0x00, 0, .none },
+ .{ .cwde, .np, .o32, .none, .none, .none, 1, 0x98, 0x00, 0x00, 0, .none },
+ .{ .cdqe, .np, .o64, .none, .none, .none, 1, 0x98, 0x00, 0x00, 0, .long },
+
+ .{ .cwd, .np, .o16, .none, .none, .none, 1, 0x99, 0x00, 0x00, 0, .none },
+ .{ .cdq, .np, .o32, .none, .none, .none, 1, 0x99, 0x00, 0x00, 0, .none },
+ .{ .cqo, .np, .o64, .none, .none, .none, 1, 0x99, 0x00, 0x00, 0, .long },
+
+ .{ .cmova, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x47, 0x00, 0, .none },
+ .{ .cmova, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x47, 0x00, 0, .none },
+ .{ .cmova, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x47, 0x00, 0, .long },
+ .{ .cmovae, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x43, 0x00, 0, .none },
+ .{ .cmovae, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x43, 0x00, 0, .none },
+ .{ .cmovae, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x43, 0x00, 0, .long },
+ .{ .cmovb, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x42, 0x00, 0, .none },
+ .{ .cmovb, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x42, 0x00, 0, .none },
+ .{ .cmovb, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x42, 0x00, 0, .long },
+ .{ .cmovbe, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x46, 0x00, 0, .none },
+ .{ .cmovbe, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x46, 0x00, 0, .none },
+ .{ .cmovbe, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x46, 0x00, 0, .long },
+ .{ .cmovc, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x42, 0x00, 0, .none },
+ .{ .cmovc, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x42, 0x00, 0, .none },
+ .{ .cmovc, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x42, 0x00, 0, .long },
+ .{ .cmove, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x44, 0x00, 0, .none },
+ .{ .cmove, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x44, 0x00, 0, .none },
+ .{ .cmove, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x44, 0x00, 0, .long },
+ .{ .cmovg, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x4f, 0x00, 0, .none },
+ .{ .cmovg, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x4f, 0x00, 0, .none },
+ .{ .cmovg, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x4f, 0x00, 0, .long },
+ .{ .cmovge, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x4d, 0x00, 0, .none },
+ .{ .cmovge, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x4d, 0x00, 0, .none },
+ .{ .cmovge, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x4d, 0x00, 0, .long },
+ .{ .cmovl, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x4c, 0x00, 0, .none },
+ .{ .cmovl, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x4c, 0x00, 0, .none },
+ .{ .cmovl, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x4c, 0x00, 0, .long },
+ .{ .cmovle, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x4e, 0x00, 0, .none },
+ .{ .cmovle, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x4e, 0x00, 0, .none },
+ .{ .cmovle, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x4e, 0x00, 0, .long },
+ .{ .cmovna, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x46, 0x00, 0, .none },
+ .{ .cmovna, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x46, 0x00, 0, .none },
+ .{ .cmovna, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x46, 0x00, 0, .long },
+ .{ .cmovnae, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x42, 0x00, 0, .none },
+ .{ .cmovnae, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x42, 0x00, 0, .none },
+ .{ .cmovnae, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x42, 0x00, 0, .long },
+ .{ .cmovnb, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x43, 0x00, 0, .none },
+ .{ .cmovnb, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x43, 0x00, 0, .none },
+ .{ .cmovnb, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x43, 0x00, 0, .long },
+ .{ .cmovnbe, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x47, 0x00, 0, .none },
+ .{ .cmovnbe, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x47, 0x00, 0, .none },
+ .{ .cmovnbe, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x47, 0x00, 0, .long },
+ .{ .cmovnc, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x43, 0x00, 0, .none },
+ .{ .cmovnc, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x43, 0x00, 0, .none },
+ .{ .cmovnc, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x43, 0x00, 0, .long },
+ .{ .cmovne, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x45, 0x00, 0, .none },
+ .{ .cmovne, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x45, 0x00, 0, .none },
+ .{ .cmovne, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x45, 0x00, 0, .long },
+ .{ .cmovng, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x4e, 0x00, 0, .none },
+ .{ .cmovng, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x4e, 0x00, 0, .none },
+ .{ .cmovng, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x4e, 0x00, 0, .long },
+ .{ .cmovnge, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x4c, 0x00, 0, .none },
+ .{ .cmovnge, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x4c, 0x00, 0, .none },
+ .{ .cmovnge, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x4c, 0x00, 0, .long },
+ .{ .cmovnl, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x4d, 0x00, 0, .none },
+ .{ .cmovnl, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x4d, 0x00, 0, .none },
+ .{ .cmovnl, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x4d, 0x00, 0, .long },
+ .{ .cmovnle, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x4f, 0x00, 0, .none },
+ .{ .cmovnle, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x4f, 0x00, 0, .none },
+ .{ .cmovnle, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x4f, 0x00, 0, .long },
+ .{ .cmovno, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x41, 0x00, 0, .none },
+ .{ .cmovno, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x41, 0x00, 0, .none },
+ .{ .cmovno, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x41, 0x00, 0, .long },
+ .{ .cmovnp, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x4b, 0x00, 0, .none },
+ .{ .cmovnp, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x4b, 0x00, 0, .none },
+ .{ .cmovnp, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x4b, 0x00, 0, .long },
+ .{ .cmovns, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x49, 0x00, 0, .none },
+ .{ .cmovns, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x49, 0x00, 0, .none },
+ .{ .cmovns, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x49, 0x00, 0, .long },
+ .{ .cmovnz, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x45, 0x00, 0, .none },
+ .{ .cmovnz, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x45, 0x00, 0, .none },
+ .{ .cmovnz, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x45, 0x00, 0, .long },
+ .{ .cmovo, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x40, 0x00, 0, .none },
+ .{ .cmovo, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x40, 0x00, 0, .none },
+ .{ .cmovo, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x40, 0x00, 0, .long },
+ .{ .cmovp, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x4a, 0x00, 0, .none },
+ .{ .cmovp, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x4a, 0x00, 0, .none },
+ .{ .cmovp, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x4a, 0x00, 0, .long },
+ .{ .cmovpe, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x4a, 0x00, 0, .none },
+ .{ .cmovpe, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x4a, 0x00, 0, .none },
+ .{ .cmovpe, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x4a, 0x00, 0, .long },
+ .{ .cmovpo, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x4b, 0x00, 0, .none },
+ .{ .cmovpo, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x4b, 0x00, 0, .none },
+ .{ .cmovpo, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x4b, 0x00, 0, .long },
+ .{ .cmovs, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x48, 0x00, 0, .none },
+ .{ .cmovs, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x48, 0x00, 0, .none },
+ .{ .cmovs, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x48, 0x00, 0, .long },
+ .{ .cmovz, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0x44, 0x00, 0, .none },
+ .{ .cmovz, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0x44, 0x00, 0, .none },
+ .{ .cmovz, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0x44, 0x00, 0, .long },
+
+ .{ .cmp, .zi, .al, .imm8, .none, .none, 1, 0x3c, 0x00, 0x00, 0, .none },
+ .{ .cmp, .zi, .ax, .imm16, .none, .none, 1, 0x3d, 0x00, 0x00, 0, .none },
+ .{ .cmp, .zi, .eax, .imm32, .none, .none, 1, 0x3d, 0x00, 0x00, 0, .none },
+ .{ .cmp, .zi, .rax, .imm32, .none, .none, 1, 0x3d, 0x00, 0x00, 0, .long },
+ .{ .cmp, .mi, .rm8, .imm8, .none, .none, 1, 0x80, 0x00, 0x00, 7, .none },
+ .{ .cmp, .mi, .rm16, .imm16, .none, .none, 1, 0x81, 0x00, 0x00, 7, .none },
+ .{ .cmp, .mi, .rm32, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 7, .none },
+ .{ .cmp, .mi, .rm64, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 7, .long },
+ .{ .cmp, .mi, .rm16, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 7, .none },
+ .{ .cmp, .mi, .rm32, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 7, .none },
+ .{ .cmp, .mi, .rm64, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 7, .long },
+ .{ .cmp, .mr, .rm8, .r8, .none, .none, 1, 0x38, 0x00, 0x00, 0, .none },
+ .{ .cmp, .mr, .rm16, .r16, .none, .none, 1, 0x39, 0x00, 0x00, 0, .none },
+ .{ .cmp, .mr, .rm32, .r32, .none, .none, 1, 0x39, 0x00, 0x00, 0, .none },
+ .{ .cmp, .mr, .rm64, .r64, .none, .none, 1, 0x39, 0x00, 0x00, 0, .long },
+ .{ .cmp, .rm, .r8, .rm8, .none, .none, 1, 0x3a, 0x00, 0x00, 0, .none },
+ .{ .cmp, .rm, .r16, .rm16, .none, .none, 1, 0x3b, 0x00, 0x00, 0, .none },
+ .{ .cmp, .rm, .r32, .rm32, .none, .none, 1, 0x3b, 0x00, 0x00, 0, .none },
+ .{ .cmp, .rm, .r64, .rm64, .none, .none, 1, 0x3b, 0x00, 0x00, 0, .long },
+
+ .{ .div, .m, .rm8, .none, .none, .none, 1, 0xf6, 0x00, 0x00, 6, .none },
+ .{ .div, .m, .rm16, .none, .none, .none, 1, 0xf7, 0x00, 0x00, 6, .none },
+ .{ .div, .m, .rm32, .none, .none, .none, 1, 0xf7, 0x00, 0x00, 6, .none },
+ .{ .div, .m, .rm64, .none, .none, .none, 1, 0xf7, 0x00, 0x00, 6, .long },
+
+ .{ .fisttp, .m, .m16, .none, .none, .none, 1, 0xdf, 0x00, 0x00, 1, .fpu },
+ .{ .fisttp, .m, .m32, .none, .none, .none, 1, 0xdb, 0x00, 0x00, 1, .fpu },
+ .{ .fisttp, .m, .m64, .none, .none, .none, 1, 0xdd, 0x00, 0x00, 1, .fpu },
+
+ .{ .fld, .m, .m32, .none, .none, .none, 1, 0xd9, 0x00, 0x00, 0, .fpu },
+ .{ .fld, .m, .m64, .none, .none, .none, 1, 0xdd, 0x00, 0x00, 0, .fpu },
+ .{ .fld, .m, .m80, .none, .none, .none, 1, 0xdb, 0x00, 0x00, 5, .fpu },
+
+ .{ .idiv, .m, .rm8, .none, .none, .none, 1, 0xf6, 0x00, 0x00, 7, .none },
+ .{ .idiv, .m, .rm16, .none, .none, .none, 1, 0xf7, 0x00, 0x00, 7, .none },
+ .{ .idiv, .m, .rm32, .none, .none, .none, 1, 0xf7, 0x00, 0x00, 7, .none },
+ .{ .idiv, .m, .rm64, .none, .none, .none, 1, 0xf7, 0x00, 0x00, 7, .long },
+
+ .{ .imul, .m, .rm8, .none, .none, .none, 1, 0xf6, 0x00, 0x00, 5, .none },
+ .{ .imul, .m, .rm16, .none, .none, .none, 1, 0xf7, 0x00, 0x00, 5, .none },
+ .{ .imul, .m, .rm32, .none, .none, .none, 1, 0xf7, 0x00, 0x00, 5, .none },
+ .{ .imul, .m, .rm64, .none, .none, .none, 1, 0xf7, 0x00, 0x00, 5, .long },
+ .{ .imul, .rm, .r16, .rm16, .none, .none, 2, 0x0f, 0xaf, 0x00, 0, .none },
+ .{ .imul, .rm, .r32, .rm32, .none, .none, 2, 0x0f, 0xaf, 0x00, 0, .none },
+ .{ .imul, .rm, .r64, .rm64, .none, .none, 2, 0x0f, 0xaf, 0x00, 0, .long },
+ .{ .imul, .rmi, .r16, .rm16, .imm8, .none, 1, 0x6b, 0x00, 0x00, 0, .none },
+ .{ .imul, .rmi, .r32, .rm32, .imm8, .none, 1, 0x6b, 0x00, 0x00, 0, .none },
+ .{ .imul, .rmi, .r64, .rm64, .imm8, .none, 1, 0x6b, 0x00, 0x00, 0, .long },
+ .{ .imul, .rmi, .r16, .rm16, .imm16, .none, 1, 0x69, 0x00, 0x00, 0, .none },
+ .{ .imul, .rmi, .r32, .rm32, .imm32, .none, 1, 0x69, 0x00, 0x00, 0, .none },
+ .{ .imul, .rmi, .r64, .rm64, .imm32, .none, 1, 0x69, 0x00, 0x00, 0, .long },
+
+ .{ .int3, .np, .none, .none, .none, .none, 1, 0xcc, 0x00, 0x00, 0, .none },
+
+ .{ .ja, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x87, 0x00, 0, .none },
+ .{ .jae, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x83, 0x00, 0, .none },
+ .{ .jb, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x82, 0x00, 0, .none },
+ .{ .jbe, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x86, 0x00, 0, .none },
+ .{ .jc, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x82, 0x00, 0, .none },
+ .{ .jrcxz, .d, .rel32, .none, .none, .none, 1, 0xe3, 0x00, 0x00, 0, .none },
+ .{ .je, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x84, 0x00, 0, .none },
+ .{ .jg, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x8f, 0x00, 0, .none },
+ .{ .jge, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x8d, 0x00, 0, .none },
+ .{ .jl, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x8c, 0x00, 0, .none },
+ .{ .jle, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x8e, 0x00, 0, .none },
+ .{ .jna, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x86, 0x00, 0, .none },
+ .{ .jnae, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x82, 0x00, 0, .none },
+ .{ .jnb, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x83, 0x00, 0, .none },
+ .{ .jnbe, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x87, 0x00, 0, .none },
+ .{ .jnc, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x83, 0x00, 0, .none },
+ .{ .jne, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x85, 0x00, 0, .none },
+ .{ .jng, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x8e, 0x00, 0, .none },
+ .{ .jnge, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x8c, 0x00, 0, .none },
+ .{ .jnl, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x8d, 0x00, 0, .none },
+ .{ .jnle, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x8f, 0x00, 0, .none },
+ .{ .jno, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x81, 0x00, 0, .none },
+ .{ .jnp, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x8b, 0x00, 0, .none },
+ .{ .jns, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x89, 0x00, 0, .none },
+ .{ .jnz, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x85, 0x00, 0, .none },
+ .{ .jo, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x80, 0x00, 0, .none },
+ .{ .jp, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x8a, 0x00, 0, .none },
+ .{ .jpe, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x8a, 0x00, 0, .none },
+ .{ .jpo, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x8b, 0x00, 0, .none },
+ .{ .js, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x88, 0x00, 0, .none },
+ .{ .jz, .d, .rel32, .none, .none, .none, 2, 0x0f, 0x84, 0x00, 0, .none },
+
+ .{ .jmp, .d, .rel32, .none, .none, .none, 1, 0xe9, 0x00, 0x00, 0, .none },
+ .{ .jmp, .m, .rm64, .none, .none, .none, 1, 0xff, 0x00, 0x00, 4, .none },
+
+ .{ .lea, .rm, .r16, .m, .none, .none, 1, 0x8d, 0x00, 0x00, 0, .none },
+ .{ .lea, .rm, .r32, .m, .none, .none, 1, 0x8d, 0x00, 0x00, 0, .none },
+ .{ .lea, .rm, .r64, .m, .none, .none, 1, 0x8d, 0x00, 0x00, 0, .long },
+
+ .{ .mov, .mr, .rm8, .r8, .none, .none, 1, 0x88, 0x00, 0x00, 0, .none },
+ .{ .mov, .mr, .rm16, .r16, .none, .none, 1, 0x89, 0x00, 0x00, 0, .none },
+ .{ .mov, .mr, .rm32, .r32, .none, .none, 1, 0x89, 0x00, 0x00, 0, .none },
+ .{ .mov, .mr, .rm64, .r64, .none, .none, 1, 0x89, 0x00, 0x00, 0, .long },
+ .{ .mov, .rm, .r8, .rm8, .none, .none, 1, 0x8a, 0x00, 0x00, 0, .none },
+ .{ .mov, .rm, .r16, .rm16, .none, .none, 1, 0x8b, 0x00, 0x00, 0, .none },
+ .{ .mov, .rm, .r32, .rm32, .none, .none, 1, 0x8b, 0x00, 0x00, 0, .none },
+ .{ .mov, .rm, .r64, .rm64, .none, .none, 1, 0x8b, 0x00, 0x00, 0, .long },
+ .{ .mov, .mr, .rm16, .sreg, .none, .none, 1, 0x8c, 0x00, 0x00, 0, .none },
+ .{ .mov, .mr, .rm64, .sreg, .none, .none, 1, 0x8c, 0x00, 0x00, 0, .long },
+ .{ .mov, .rm, .sreg, .rm16, .none, .none, 1, 0x8e, 0x00, 0x00, 0, .none },
+ .{ .mov, .rm, .sreg, .rm64, .none, .none, 1, 0x8e, 0x00, 0x00, 0, .long },
+ .{ .mov, .fd, .al, .moffs, .none, .none, 1, 0xa0, 0x00, 0x00, 0, .none },
+ .{ .mov, .fd, .ax, .moffs, .none, .none, 1, 0xa1, 0x00, 0x00, 0, .none },
+ .{ .mov, .fd, .eax, .moffs, .none, .none, 1, 0xa1, 0x00, 0x00, 0, .none },
+ .{ .mov, .fd, .rax, .moffs, .none, .none, 1, 0xa1, 0x00, 0x00, 0, .long },
+ .{ .mov, .td, .moffs, .al, .none, .none, 1, 0xa2, 0x00, 0x00, 0, .none },
+ .{ .mov, .td, .moffs, .ax, .none, .none, 1, 0xa3, 0x00, 0x00, 0, .none },
+ .{ .mov, .td, .moffs, .eax, .none, .none, 1, 0xa3, 0x00, 0x00, 0, .none },
+ .{ .mov, .td, .moffs, .rax, .none, .none, 1, 0xa3, 0x00, 0x00, 0, .long },
+ .{ .mov, .oi, .r8, .imm8, .none, .none, 1, 0xb0, 0x00, 0x00, 0, .none },
+ .{ .mov, .oi, .r16, .imm16, .none, .none, 1, 0xb8, 0x00, 0x00, 0, .none },
+ .{ .mov, .oi, .r32, .imm32, .none, .none, 1, 0xb8, 0x00, 0x00, 0, .none },
+ .{ .mov, .oi, .r64, .imm64, .none, .none, 1, 0xb8, 0x00, 0x00, 0, .long },
+ .{ .mov, .mi, .rm8, .imm8, .none, .none, 1, 0xc6, 0x00, 0x00, 0, .none },
+ .{ .mov, .mi, .rm16, .imm16, .none, .none, 1, 0xc7, 0x00, 0x00, 0, .none },
+ .{ .mov, .mi, .rm32, .imm32, .none, .none, 1, 0xc7, 0x00, 0x00, 0, .none },
+ .{ .mov, .mi, .rm64, .imm32, .none, .none, 1, 0xc7, 0x00, 0x00, 0, .long },
+
+ .{ .movsx, .rm, .r16, .rm8, .none, .none, 2, 0x0f, 0xbe, 0x00, 0, .none },
+ .{ .movsx, .rm, .r32, .rm8, .none, .none, 2, 0x0f, 0xbe, 0x00, 0, .none },
+ .{ .movsx, .rm, .r64, .rm8, .none, .none, 2, 0x0f, 0xbe, 0x00, 0, .long },
+ .{ .movsx, .rm, .r32, .rm16, .none, .none, 2, 0x0f, 0xbf, 0x00, 0, .none },
+ .{ .movsx, .rm, .r64, .rm16, .none, .none, 2, 0x0f, 0xbf, 0x00, 0, .long },
+
+ // This instruction is discouraged.
+ .{ .movsxd, .rm, .r32, .rm32, .none, .none, 1, 0x63, 0x00, 0x00, 0, .none },
+ .{ .movsxd, .rm, .r64, .rm32, .none, .none, 1, 0x63, 0x00, 0x00, 0, .long },
+
+ .{ .movzx, .rm, .r16, .rm8, .none, .none, 2, 0x0f, 0xb6, 0x00, 0, .none },
+ .{ .movzx, .rm, .r32, .rm8, .none, .none, 2, 0x0f, 0xb6, 0x00, 0, .none },
+ .{ .movzx, .rm, .r64, .rm8, .none, .none, 2, 0x0f, 0xb6, 0x00, 0, .long },
+ .{ .movzx, .rm, .r32, .rm16, .none, .none, 2, 0x0f, 0xb7, 0x00, 0, .none },
+ .{ .movzx, .rm, .r64, .rm16, .none, .none, 2, 0x0f, 0xb7, 0x00, 0, .long },
+
+ .{ .mul, .m, .rm8, .none, .none, .none, 1, 0xf6, 0x00, 0x00, 4, .none },
+ .{ .mul, .m, .rm16, .none, .none, .none, 1, 0xf7, 0x00, 0x00, 4, .none },
+ .{ .mul, .m, .rm32, .none, .none, .none, 1, 0xf7, 0x00, 0x00, 4, .none },
+ .{ .mul, .m, .rm64, .none, .none, .none, 1, 0xf7, 0x00, 0x00, 4, .long },
+
+ .{ .nop, .np, .none, .none, .none, .none, 1, 0x90, 0x00, 0x00, 0, .none },
+
+ .{ .@"or", .zi, .al, .imm8, .none, .none, 1, 0x0c, 0x00, 0x00, 0, .none },
+ .{ .@"or", .zi, .ax, .imm16, .none, .none, 1, 0x0d, 0x00, 0x00, 0, .none },
+ .{ .@"or", .zi, .eax, .imm32, .none, .none, 1, 0x0d, 0x00, 0x00, 0, .none },
+ .{ .@"or", .zi, .rax, .imm32, .none, .none, 1, 0x0d, 0x00, 0x00, 0, .long },
+ .{ .@"or", .mi, .rm8, .imm8, .none, .none, 1, 0x80, 0x00, 0x00, 1, .none },
+ .{ .@"or", .mi, .rm16, .imm16, .none, .none, 1, 0x81, 0x00, 0x00, 1, .none },
+ .{ .@"or", .mi, .rm32, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 1, .none },
+ .{ .@"or", .mi, .rm64, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 1, .long },
+ .{ .@"or", .mi, .rm16, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 1, .none },
+ .{ .@"or", .mi, .rm32, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 1, .none },
+ .{ .@"or", .mi, .rm64, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 1, .long },
+ .{ .@"or", .mr, .rm8, .r8, .none, .none, 1, 0x08, 0x00, 0x00, 0, .none },
+ .{ .@"or", .mr, .rm16, .r16, .none, .none, 1, 0x09, 0x00, 0x00, 0, .none },
+ .{ .@"or", .mr, .rm32, .r32, .none, .none, 1, 0x09, 0x00, 0x00, 0, .none },
+ .{ .@"or", .mr, .rm64, .r64, .none, .none, 1, 0x09, 0x00, 0x00, 0, .long },
+ .{ .@"or", .rm, .r8, .rm8, .none, .none, 1, 0x0a, 0x00, 0x00, 0, .none },
+ .{ .@"or", .rm, .r16, .rm16, .none, .none, 1, 0x0b, 0x00, 0x00, 0, .none },
+ .{ .@"or", .rm, .r32, .rm32, .none, .none, 1, 0x0b, 0x00, 0x00, 0, .none },
+ .{ .@"or", .rm, .r64, .rm64, .none, .none, 1, 0x0b, 0x00, 0x00, 0, .long },
+
+ .{ .pop, .o, .r16, .none, .none, .none, 1, 0x58, 0x00, 0x00, 0, .none },
+ .{ .pop, .o, .r64, .none, .none, .none, 1, 0x58, 0x00, 0x00, 0, .none },
+ .{ .pop, .m, .rm16, .none, .none, .none, 1, 0x8f, 0x00, 0x00, 0, .none },
+ .{ .pop, .m, .rm64, .none, .none, .none, 1, 0x8f, 0x00, 0x00, 0, .none },
+
+ .{ .push, .o, .r16, .none, .none, .none, 1, 0x50, 0x00, 0x00, 0, .none },
+ .{ .push, .o, .r64, .none, .none, .none, 1, 0x50, 0x00, 0x00, 0, .none },
+ .{ .push, .m, .rm16, .none, .none, .none, 1, 0xff, 0x00, 0x00, 6, .none },
+ .{ .push, .m, .rm64, .none, .none, .none, 1, 0xff, 0x00, 0x00, 6, .none },
+ .{ .push, .i, .imm8, .none, .none, .none, 1, 0x6a, 0x00, 0x00, 0, .none },
+ .{ .push, .i, .imm16, .none, .none, .none, 1, 0x68, 0x00, 0x00, 0, .none },
+ .{ .push, .i, .imm32, .none, .none, .none, 1, 0x68, 0x00, 0x00, 0, .none },
+
+ .{ .ret, .np, .none, .none, .none, .none, 1, 0xc3, 0x00, 0x00, 0, .none },
+
+ .{ .sal, .m1, .rm8, .unity, .none, .none, 1, 0xd0, 0x00, 0x00, 4, .none },
+ .{ .sal, .m1, .rm16, .unity, .none, .none, 1, 0xd1, 0x00, 0x00, 4, .none },
+ .{ .sal, .m1, .rm32, .unity, .none, .none, 1, 0xd1, 0x00, 0x00, 4, .none },
+ .{ .sal, .m1, .rm64, .unity, .none, .none, 1, 0xd1, 0x00, 0x00, 4, .long },
+ .{ .sal, .mc, .rm8, .cl, .none, .none, 1, 0xd2, 0x00, 0x00, 4, .none },
+ .{ .sal, .mc, .rm16, .cl, .none, .none, 1, 0xd3, 0x00, 0x00, 4, .none },
+ .{ .sal, .mc, .rm32, .cl, .none, .none, 1, 0xd3, 0x00, 0x00, 4, .none },
+ .{ .sal, .mc, .rm64, .cl, .none, .none, 1, 0xd3, 0x00, 0x00, 4, .long },
+ .{ .sal, .mi, .rm8, .imm8, .none, .none, 1, 0xc0, 0x00, 0x00, 4, .none },
+ .{ .sal, .mi, .rm16, .imm8, .none, .none, 1, 0xc1, 0x00, 0x00, 4, .none },
+ .{ .sal, .mi, .rm32, .imm8, .none, .none, 1, 0xc1, 0x00, 0x00, 4, .none },
+ .{ .sal, .mi, .rm64, .imm8, .none, .none, 1, 0xc1, 0x00, 0x00, 4, .long },
+
+ .{ .sar, .m1, .rm8, .unity, .none, .none, 1, 0xd0, 0x00, 0x00, 7, .none },
+ .{ .sar, .m1, .rm16, .unity, .none, .none, 1, 0xd1, 0x00, 0x00, 7, .none },
+ .{ .sar, .m1, .rm32, .unity, .none, .none, 1, 0xd1, 0x00, 0x00, 7, .none },
+ .{ .sar, .m1, .rm64, .unity, .none, .none, 1, 0xd1, 0x00, 0x00, 7, .long },
+ .{ .sar, .mc, .rm8, .cl, .none, .none, 1, 0xd2, 0x00, 0x00, 7, .none },
+ .{ .sar, .mc, .rm16, .cl, .none, .none, 1, 0xd3, 0x00, 0x00, 7, .none },
+ .{ .sar, .mc, .rm32, .cl, .none, .none, 1, 0xd3, 0x00, 0x00, 7, .none },
+ .{ .sar, .mc, .rm64, .cl, .none, .none, 1, 0xd3, 0x00, 0x00, 7, .long },
+ .{ .sar, .mi, .rm8, .imm8, .none, .none, 1, 0xc0, 0x00, 0x00, 7, .none },
+ .{ .sar, .mi, .rm16, .imm8, .none, .none, 1, 0xc1, 0x00, 0x00, 7, .none },
+ .{ .sar, .mi, .rm32, .imm8, .none, .none, 1, 0xc1, 0x00, 0x00, 7, .none },
+ .{ .sar, .mi, .rm64, .imm8, .none, .none, 1, 0xc1, 0x00, 0x00, 7, .long },
+
+ .{ .sbb, .zi, .al, .imm8, .none, .none, 1, 0x1c, 0x00, 0x00, 0, .none },
+ .{ .sbb, .zi, .ax, .imm16, .none, .none, 1, 0x1d, 0x00, 0x00, 0, .none },
+ .{ .sbb, .zi, .eax, .imm32, .none, .none, 1, 0x1d, 0x00, 0x00, 0, .none },
+ .{ .sbb, .zi, .rax, .imm32, .none, .none, 1, 0x1d, 0x00, 0x00, 0, .long },
+ .{ .sbb, .mi, .rm8, .imm8, .none, .none, 1, 0x80, 0x00, 0x00, 3, .none },
+ .{ .sbb, .mi, .rm16, .imm16, .none, .none, 1, 0x81, 0x00, 0x00, 3, .none },
+ .{ .sbb, .mi, .rm32, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 3, .none },
+ .{ .sbb, .mi, .rm64, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 3, .long },
+ .{ .sbb, .mi, .rm16, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 3, .none },
+ .{ .sbb, .mi, .rm32, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 3, .none },
+ .{ .sbb, .mi, .rm64, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 3, .long },
+ .{ .sbb, .mr, .rm8, .r8, .none, .none, 1, 0x18, 0x00, 0x00, 0, .none },
+ .{ .sbb, .mr, .rm16, .r16, .none, .none, 1, 0x19, 0x00, 0x00, 0, .none },
+ .{ .sbb, .mr, .rm32, .r32, .none, .none, 1, 0x19, 0x00, 0x00, 0, .none },
+ .{ .sbb, .mr, .rm64, .r64, .none, .none, 1, 0x19, 0x00, 0x00, 0, .long },
+ .{ .sbb, .rm, .r8, .rm8, .none, .none, 1, 0x1a, 0x00, 0x00, 0, .none },
+ .{ .sbb, .rm, .r16, .rm16, .none, .none, 1, 0x1b, 0x00, 0x00, 0, .none },
+ .{ .sbb, .rm, .r32, .rm32, .none, .none, 1, 0x1b, 0x00, 0x00, 0, .none },
+ .{ .sbb, .rm, .r64, .rm64, .none, .none, 1, 0x1b, 0x00, 0x00, 0, .long },
+
+ .{ .seta, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x97, 0x00, 0, .none },
+ .{ .setae, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x93, 0x00, 0, .none },
+ .{ .setb, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x92, 0x00, 0, .none },
+ .{ .setbe, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x96, 0x00, 0, .none },
+ .{ .setc, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x92, 0x00, 0, .none },
+ .{ .sete, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x94, 0x00, 0, .none },
+ .{ .setg, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x9f, 0x00, 0, .none },
+ .{ .setge, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x9d, 0x00, 0, .none },
+ .{ .setl, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x9c, 0x00, 0, .none },
+ .{ .setle, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x9e, 0x00, 0, .none },
+ .{ .setna, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x96, 0x00, 0, .none },
+ .{ .setnae, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x92, 0x00, 0, .none },
+ .{ .setnb, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x93, 0x00, 0, .none },
+ .{ .setnbe, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x97, 0x00, 0, .none },
+ .{ .setnc, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x93, 0x00, 0, .none },
+ .{ .setne, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x95, 0x00, 0, .none },
+ .{ .setng, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x9e, 0x00, 0, .none },
+ .{ .setnge, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x9c, 0x00, 0, .none },
+ .{ .setnl, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x9d, 0x00, 0, .none },
+ .{ .setnle, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x9f, 0x00, 0, .none },
+ .{ .setno, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x91, 0x00, 0, .none },
+ .{ .setnp, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x9b, 0x00, 0, .none },
+ .{ .setns, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x99, 0x00, 0, .none },
+ .{ .setnz, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x95, 0x00, 0, .none },
+ .{ .seto, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x90, 0x00, 0, .none },
+ .{ .setp, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x9a, 0x00, 0, .none },
+ .{ .setpe, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x9a, 0x00, 0, .none },
+ .{ .setpo, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x9b, 0x00, 0, .none },
+ .{ .sets, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x98, 0x00, 0, .none },
+ .{ .setz, .m, .rm8, .none, .none, .none, 2, 0x0f, 0x94, 0x00, 0, .none },
+
+ .{ .shl, .m1, .rm8, .unity, .none, .none, 1, 0xd0, 0x00, 0x00, 4, .none },
+ .{ .shl, .m1, .rm16, .unity, .none, .none, 1, 0xd1, 0x00, 0x00, 4, .none },
+ .{ .shl, .m1, .rm32, .unity, .none, .none, 1, 0xd1, 0x00, 0x00, 4, .none },
+ .{ .shl, .m1, .rm64, .unity, .none, .none, 1, 0xd1, 0x00, 0x00, 4, .long },
+ .{ .shl, .mc, .rm8, .cl, .none, .none, 1, 0xd2, 0x00, 0x00, 4, .none },
+ .{ .shl, .mc, .rm16, .cl, .none, .none, 1, 0xd3, 0x00, 0x00, 4, .none },
+ .{ .shl, .mc, .rm32, .cl, .none, .none, 1, 0xd3, 0x00, 0x00, 4, .none },
+ .{ .shl, .mc, .rm64, .cl, .none, .none, 1, 0xd3, 0x00, 0x00, 4, .long },
+ .{ .shl, .mi, .rm8, .imm8, .none, .none, 1, 0xc0, 0x00, 0x00, 4, .none },
+ .{ .shl, .mi, .rm16, .imm8, .none, .none, 1, 0xc1, 0x00, 0x00, 4, .none },
+ .{ .shl, .mi, .rm32, .imm8, .none, .none, 1, 0xc1, 0x00, 0x00, 4, .none },
+ .{ .shl, .mi, .rm64, .imm8, .none, .none, 1, 0xc1, 0x00, 0x00, 4, .long },
+
+ .{ .shr, .m1, .rm8, .unity, .none, .none, 1, 0xd0, 0x00, 0x00, 5, .none },
+ .{ .shr, .m1, .rm16, .unity, .none, .none, 1, 0xd1, 0x00, 0x00, 5, .none },
+ .{ .shr, .m1, .rm32, .unity, .none, .none, 1, 0xd1, 0x00, 0x00, 5, .none },
+ .{ .shr, .m1, .rm64, .unity, .none, .none, 1, 0xd1, 0x00, 0x00, 5, .long },
+ .{ .shr, .mc, .rm8, .cl, .none, .none, 1, 0xd2, 0x00, 0x00, 5, .none },
+ .{ .shr, .mc, .rm16, .cl, .none, .none, 1, 0xd3, 0x00, 0x00, 5, .none },
+ .{ .shr, .mc, .rm32, .cl, .none, .none, 1, 0xd3, 0x00, 0x00, 5, .none },
+ .{ .shr, .mc, .rm64, .cl, .none, .none, 1, 0xd3, 0x00, 0x00, 5, .long },
+ .{ .shr, .mi, .rm8, .imm8, .none, .none, 1, 0xc0, 0x00, 0x00, 5, .none },
+ .{ .shr, .mi, .rm16, .imm8, .none, .none, 1, 0xc1, 0x00, 0x00, 5, .none },
+ .{ .shr, .mi, .rm32, .imm8, .none, .none, 1, 0xc1, 0x00, 0x00, 5, .none },
+ .{ .shr, .mi, .rm64, .imm8, .none, .none, 1, 0xc1, 0x00, 0x00, 5, .long },
+
+ .{ .sub, .zi, .al, .imm8, .none, .none, 1, 0x2c, 0x00, 0x00, 0, .none },
+ .{ .sub, .zi, .ax, .imm16, .none, .none, 1, 0x2d, 0x00, 0x00, 0, .none },
+ .{ .sub, .zi, .eax, .imm32, .none, .none, 1, 0x2d, 0x00, 0x00, 0, .none },
+ .{ .sub, .zi, .rax, .imm32, .none, .none, 1, 0x2d, 0x00, 0x00, 0, .long },
+ .{ .sub, .mi, .rm8, .imm8, .none, .none, 1, 0x80, 0x00, 0x00, 5, .none },
+ .{ .sub, .mi, .rm16, .imm16, .none, .none, 1, 0x81, 0x00, 0x00, 5, .none },
+ .{ .sub, .mi, .rm32, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 5, .none },
+ .{ .sub, .mi, .rm64, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 5, .long },
+ .{ .sub, .mi, .rm16, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 5, .none },
+ .{ .sub, .mi, .rm32, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 5, .none },
+ .{ .sub, .mi, .rm64, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 5, .long },
+ .{ .sub, .mr, .rm8, .r8, .none, .none, 1, 0x28, 0x00, 0x00, 0, .none },
+ .{ .sub, .mr, .rm16, .r16, .none, .none, 1, 0x29, 0x00, 0x00, 0, .none },
+ .{ .sub, .mr, .rm32, .r32, .none, .none, 1, 0x29, 0x00, 0x00, 0, .none },
+ .{ .sub, .mr, .rm64, .r64, .none, .none, 1, 0x29, 0x00, 0x00, 0, .long },
+ .{ .sub, .rm, .r8, .rm8, .none, .none, 1, 0x2a, 0x00, 0x00, 0, .none },
+ .{ .sub, .rm, .r16, .rm16, .none, .none, 1, 0x2b, 0x00, 0x00, 0, .none },
+ .{ .sub, .rm, .r32, .rm32, .none, .none, 1, 0x2b, 0x00, 0x00, 0, .none },
+ .{ .sub, .rm, .r64, .rm64, .none, .none, 1, 0x2b, 0x00, 0x00, 0, .long },
+
+ .{ .syscall, .np, .none, .none, .none, .none, 2, 0x0f, 0x05, 0x00, 0, .none },
+
+ .{ .@"test", .zi, .al, .imm8, .none, .none, 1, 0xa8, 0x00, 0x00, 0, .none },
+ .{ .@"test", .zi, .ax, .imm16, .none, .none, 1, 0xa9, 0x00, 0x00, 0, .none },
+ .{ .@"test", .zi, .eax, .imm32, .none, .none, 1, 0xa9, 0x00, 0x00, 0, .none },
+ .{ .@"test", .zi, .rax, .imm32, .none, .none, 1, 0xa9, 0x00, 0x00, 0, .long },
+ .{ .@"test", .mi, .rm8, .imm8, .none, .none, 1, 0xf6, 0x00, 0x00, 0, .none },
+ .{ .@"test", .mi, .rm16, .imm16, .none, .none, 1, 0xf7, 0x00, 0x00, 0, .none },
+ .{ .@"test", .mi, .rm32, .imm32, .none, .none, 1, 0xf7, 0x00, 0x00, 0, .none },
+ .{ .@"test", .mi, .rm64, .imm32, .none, .none, 1, 0xf7, 0x00, 0x00, 0, .long },
+ .{ .@"test", .mr, .rm8, .r8, .none, .none, 1, 0x84, 0x00, 0x00, 0, .none },
+ .{ .@"test", .mr, .rm16, .r16, .none, .none, 1, 0x85, 0x00, 0x00, 0, .none },
+ .{ .@"test", .mr, .rm32, .r32, .none, .none, 1, 0x85, 0x00, 0x00, 0, .none },
+ .{ .@"test", .mr, .rm64, .r64, .none, .none, 1, 0x85, 0x00, 0x00, 0, .long },
+
+ .{ .ud2, .np, .none, .none, .none, .none, 2, 0x0f, 0x0b, 0x00, 0, .none },
+
+ .{ .xor, .zi, .al, .imm8, .none, .none, 1, 0x34, 0x00, 0x00, 0, .none },
+ .{ .xor, .zi, .ax, .imm16, .none, .none, 1, 0x35, 0x00, 0x00, 0, .none },
+ .{ .xor, .zi, .eax, .imm32, .none, .none, 1, 0x35, 0x00, 0x00, 0, .none },
+ .{ .xor, .zi, .rax, .imm32, .none, .none, 1, 0x35, 0x00, 0x00, 0, .long },
+ .{ .xor, .mi, .rm8, .imm8, .none, .none, 1, 0x80, 0x00, 0x00, 6, .none },
+ .{ .xor, .mi, .rm16, .imm16, .none, .none, 1, 0x81, 0x00, 0x00, 6, .none },
+ .{ .xor, .mi, .rm32, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 6, .none },
+ .{ .xor, .mi, .rm64, .imm32, .none, .none, 1, 0x81, 0x00, 0x00, 6, .long },
+ .{ .xor, .mi, .rm16, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 6, .none },
+ .{ .xor, .mi, .rm32, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 6, .none },
+ .{ .xor, .mi, .rm64, .imm8, .none, .none, 1, 0x83, 0x00, 0x00, 6, .long },
+ .{ .xor, .mr, .rm8, .r8, .none, .none, 1, 0x30, 0x00, 0x00, 0, .none },
+ .{ .xor, .mr, .rm16, .r16, .none, .none, 1, 0x31, 0x00, 0x00, 0, .none },
+ .{ .xor, .mr, .rm32, .r32, .none, .none, 1, 0x31, 0x00, 0x00, 0, .none },
+ .{ .xor, .mr, .rm64, .r64, .none, .none, 1, 0x31, 0x00, 0x00, 0, .long },
+ .{ .xor, .rm, .r8, .rm8, .none, .none, 1, 0x32, 0x00, 0x00, 0, .none },
+ .{ .xor, .rm, .r16, .rm16, .none, .none, 1, 0x33, 0x00, 0x00, 0, .none },
+ .{ .xor, .rm, .r32, .rm32, .none, .none, 1, 0x33, 0x00, 0x00, 0, .none },
+ .{ .xor, .rm, .r64, .rm64, .none, .none, 1, 0x33, 0x00, 0x00, 0, .long },
+
+ // SSE
+ .{ .addss, .rm, .xmm, .xmm_m32, .none, .none, 3, 0xf3, 0x0f, 0x58, 0, .sse },
+
+ .{ .cmpss, .rmi, .xmm, .xmm_m32, .imm8, .none, 3, 0xf3, 0x0f, 0xc2, 0, .sse },
+
+ .{ .movss, .rm, .xmm, .xmm_m32, .none, .none, 3, 0xf3, 0x0f, 0x10, 0, .sse },
+ .{ .movss, .mr, .xmm_m32, .xmm, .none, .none, 3, 0xf3, 0x0f, 0x11, 0, .sse },
+
+ .{ .ucomiss, .rm, .xmm, .xmm_m32, .none, .none, 2, 0x0f, 0x2e, 0x00, 0, .sse },
+
+ // SSE2
+ .{ .addsd, .rm, .xmm, .xmm_m64, .none, .none, 3, 0xf2, 0x0f, 0x58, 0, .sse2 },
+
+ .{ .cmpsd, .rmi, .xmm, .xmm_m64, .imm8, .none, 3, 0xf2, 0x0f, 0xc2, 0, .sse2 },
+
+ .{ .movq, .rm, .xmm, .xmm_m64, .none, .none, 3, 0xf3, 0x0f, 0x7e, 0, .sse2 },
+ .{ .movq, .mr, .xmm_m64, .xmm, .none, .none, 3, 0x66, 0x0f, 0xd6, 0, .sse2 },
+
+ .{ .movsd, .rm, .xmm, .xmm_m64, .none, .none, 3, 0xf2, 0x0f, 0x10, 0, .sse2 },
+ .{ .movsd, .mr, .xmm_m64, .xmm, .none, .none, 3, 0xf2, 0x0f, 0x11, 0, .sse2 },
+
+ .{ .ucomisd, .rm, .xmm, .xmm_m64, .none, .none, 3, 0x66, 0x0f, 0x2e, 0, .sse2 },
+};
+// zig fmt: on
src/arch/x86_64/Mir.zig
@@ -339,41 +339,23 @@ pub const Inst = struct {
/// Nop
nop,
- /// SSE instructions
+ /// SSE/AVX instructions
/// ops flags: form:
/// 0b00 reg1, qword ptr [reg2 + imm32]
/// 0b01 qword ptr [reg1 + imm32], reg2
/// 0b10 reg1, reg2
- mov_f64_sse,
- mov_f32_sse,
+ mov_f64,
+ mov_f32,
/// ops flags: form:
/// 0b00 reg1, reg2
- add_f64_sse,
- add_f32_sse,
+ add_f64,
+ add_f32,
/// ops flags: form:
/// 0b00 reg1, reg2
- cmp_f64_sse,
- cmp_f32_sse,
-
- /// AVX instructions
- /// ops flags: form:
- /// 0b00 reg1, qword ptr [reg2 + imm32]
- /// 0b01 qword ptr [reg1 + imm32], reg2
- /// 0b10 reg1, reg1, reg2
- mov_f64_avx,
- mov_f32_avx,
-
- /// ops flags: form:
- /// 0b00 reg1, reg1, reg2
- add_f64_avx,
- add_f32_avx,
-
- /// ops flags: form:
- /// 0b00 reg1, reg1, reg2
- cmp_f64_avx,
- cmp_f32_avx,
+ cmp_f64,
+ cmp_f32,
/// Pseudo-instructions
/// call extern function
@@ -439,6 +421,8 @@ pub const Inst = struct {
inst: Index,
/// A 32-bit immediate value.
imm: u32,
+ /// A 32-bit signed displacement value.
+ disp: i32,
/// A condition code for use with EFLAGS register.
cc: bits.Condition,
/// Another instruction with condition code.
@@ -476,9 +460,9 @@ pub const IndexRegisterDisp = struct {
index: u32,
/// Displacement value
- disp: u32,
+ disp: i32,
- pub fn encode(index: Register, disp: u32) IndexRegisterDisp {
+ pub fn encode(index: Register, disp: i32) IndexRegisterDisp {
return .{
.index = @enumToInt(index),
.disp = disp,
@@ -487,7 +471,7 @@ pub const IndexRegisterDisp = struct {
pub fn decode(this: IndexRegisterDisp) struct {
index: Register,
- disp: u32,
+ disp: i32,
} {
return .{
.index = @intToEnum(Register, this.index),
@@ -503,12 +487,12 @@ pub const IndexRegisterDispImm = struct {
index: u32,
/// Displacement value
- disp: u32,
+ disp: i32,
/// Immediate
imm: u32,
- pub fn encode(index: Register, disp: u32, imm: u32) IndexRegisterDispImm {
+ pub fn encode(index: Register, disp: i32, imm: u32) IndexRegisterDispImm {
return .{
.index = @enumToInt(index),
.disp = disp,
@@ -518,7 +502,7 @@ pub const IndexRegisterDispImm = struct {
pub fn decode(this: IndexRegisterDispImm) struct {
index: Register,
- disp: u32,
+ disp: i32,
imm: u32,
} {
return .{
@@ -576,7 +560,7 @@ pub const SaveRegisterList = struct {
};
pub const ImmPair = struct {
- dest_off: u32,
+ dest_off: i32,
operand: u32,
};