Commit 8643591c9a
Changed files (4)
test
behavior
src/codegen/c.zig
@@ -1709,11 +1709,11 @@ fn genBody(f: *Function, body: []const Air.Inst.Index) error{ AnalysisFail, OutO
.memcpy => try airMemcpy(f, inst),
.set_union_tag => try airSetUnionTag(f, inst),
.get_union_tag => try airGetUnionTag(f, inst),
- .clz => try airBuiltinCall(f, inst, "clz", .{}),
- .ctz => try airBuiltinCall(f, inst, "ctz", .{}),
- .popcount => try airBuiltinCall(f, inst, "popcount", .{}),
- .byte_swap => try airBuiltinCall(f, inst, "byte_swap", .{ .needs_signedness_info = true }),
- .bit_reverse => try airBuiltinCall(f, inst, "bit_reverse", .{ .needs_signedness_info = true }),
+ .clz => try airBuiltinCall(f, inst, "clz"),
+ .ctz => try airBuiltinCall(f, inst, "ctz"),
+ .popcount => try airBuiltinCall(f, inst, "popcount"),
+ .byte_swap => try airBuiltinCall(f, inst, "byte_swap"),
+ .bit_reverse => try airBuiltinCall(f, inst, "bit_reverse"),
.tag_name => try airTagName(f, inst),
.error_name => try airErrorName(f, inst),
.splat => try airSplat(f, inst),
@@ -3351,7 +3351,7 @@ fn airPtrToInt(f: *Function, inst: Air.Inst.Index) !CValue {
return local;
}
-fn airBuiltinCall(f: *Function, inst: Air.Inst.Index, fn_name: [*:0]const u8, options: struct { needs_signedness_info: bool = false }) !CValue {
+fn airBuiltinCall(f: *Function, inst: Air.Inst.Index, fn_name: [*:0]const u8) !CValue {
if (f.liveness.isUnused(inst)) return CValue.none;
const inst_ty = f.air.typeOfIndex(inst);
@@ -3362,20 +3362,17 @@ fn airBuiltinCall(f: *Function, inst: Air.Inst.Index, fn_name: [*:0]const u8, op
const writer = f.object.writer();
const int_info = operand_ty.intInfo(target);
- _ = toCIntBits(int_info.bits) orelse
+ const c_bits = toCIntBits(int_info.bits) orelse
return f.fail("TODO: C backend: implement integer types larger than 128 bits", .{});
- try writer.print(" = zig_{s}(", .{fn_name});
+ try writer.print(" = zig_{s}_", .{fn_name});
+ const prefix_byte: u8 = switch (int_info.signedness) {
+ .signed => 'i',
+ .unsigned => 'u',
+ };
+ try writer.print("{c}{d}(", .{ prefix_byte, c_bits });
try f.writeCValue(writer, try f.resolveInst(operand));
- try writer.print(", {d}", .{int_info.bits});
- if (options.needs_signedness_info) {
- const signed_type = switch (int_info.signedness) {
- .signed => "true",
- .unsigned => "false",
- };
- try writer.print(", {s}", .{signed_type});
- }
- try writer.writeAll(");\n");
+ try writer.print(", {d});\n", .{int_info.bits});
return local;
}
src/link/C/zig.h
@@ -503,104 +503,248 @@ zig_shl_sat_s(long, long, ((sizeof(long )) * CHAR_BIT - 1))
#define zig_bitsizeof(T) (CHAR_BIT * sizeof(T))
#define zig_bit_mask(T, bit_width) \
- ((bit_width) == 128 \
- ? ((T)(((uint128_t) 0xffffffffffffffff) << 64 | \
- (uint128_t) 0xffffffffffffffff)) \
+ ((bit_width) == zig_bitsizeof(T) \
+ ? ((T)-1) \
: (((T)1 << (T)(bit_width)) - 1))
-static inline uint128_t zig_sign_extend(uint128_t value, uint128_t zig_type_bit_width) {
- const uint128_t m = (uint128_t)1 << (zig_type_bit_width - 1);
- return (value ^ m) - m;
+static inline int zig_clz(unsigned int value, uint8_t zig_type_bit_width) {
+ if (value == 0) return zig_type_bit_width;
+ return __builtin_clz(value) - zig_bitsizeof(unsigned int) + zig_type_bit_width;
+}
+
+static inline int zig_clzl(unsigned long value, uint8_t zig_type_bit_width) {
+ if (value == 0) return zig_type_bit_width;
+ return __builtin_clzl(value) - zig_bitsizeof(unsigned long) + zig_type_bit_width;
+}
+
+static inline int zig_clzll(unsigned long long value, uint8_t zig_type_bit_width) {
+ if (value == 0) return zig_type_bit_width;
+ return __builtin_clzll(value) - zig_bitsizeof(unsigned long long) + zig_type_bit_width;
+}
+
+#define zig_clz_u8 zig_clz
+#define zig_clz_i8 zig_clz
+#define zig_clz_u16 zig_clz
+#define zig_clz_i16 zig_clz
+#define zig_clz_u32 zig_clzl
+#define zig_clz_i32 zig_clzl
+#define zig_clz_u64 zig_clzll
+#define zig_clz_i64 zig_clzll
+
+static inline int zig_clz_u128(uint128_t value, uint8_t zig_type_bit_width) {
+ if (value == 0) return zig_type_bit_width;
+ const uint128_t mask = zig_bit_mask(uint128_t, zig_type_bit_width);
+ const uint64_t hi = (value & mask) >> 64;
+ const uint64_t lo = (value & mask);
+ const int leading_zeroes = (
+ hi != 0 ? __builtin_clzll(hi) : 64 + (lo != 0 ? __builtin_clzll(lo) : 64));
+ return leading_zeroes - zig_bitsizeof(uint128_t) + zig_type_bit_width;
+}
+
+#define zig_clz_i128 zig_clz_u128
+
+static inline int zig_ctz(unsigned int value, uint8_t zig_type_bit_width) {
+ if (value == 0) return zig_type_bit_width;
+ return __builtin_ctz(value & zig_bit_mask(unsigned int, zig_type_bit_width));
}
-static inline int zig_clz(unsigned long long value, uint8_t zig_type_bit_width) {
+static inline int zig_ctzl(unsigned long value, uint8_t zig_type_bit_width) {
if (value == 0) return zig_type_bit_width;
- if (zig_type_bit_width <= zig_bitsizeof(unsigned int))
- return (__builtin_clz(value) - zig_bitsizeof(unsigned int) + zig_type_bit_width);
- if (zig_type_bit_width <= zig_bitsizeof(unsigned long))
- return (__builtin_clzl(value) - zig_bitsizeof(unsigned long) + zig_type_bit_width);
- return (__builtin_clzll(value) - zig_bitsizeof(unsigned long long) + zig_type_bit_width);
+ return __builtin_ctzl(value & zig_bit_mask(unsigned long, zig_type_bit_width));
}
-static inline int zig_ctz(unsigned long long value, uint8_t zig_type_bit_width) {
+static inline int zig_ctzll(unsigned long value, uint8_t zig_type_bit_width) {
if (value == 0) return zig_type_bit_width;
- if (zig_type_bit_width <= zig_bitsizeof(unsigned int)) return __builtin_ctz(value);
- if (zig_type_bit_width <= zig_bitsizeof(unsigned long)) return __builtin_ctzl(value);
- return __builtin_ctzll(value);
-}
-
-static inline int zig_popcount(unsigned long long value, uint8_t zig_type_bit_width) {
- const unsigned long long mask = zig_bit_mask(unsigned long long, zig_type_bit_width);
- if (zig_type_bit_width <= zig_bitsizeof(unsigned int))
- return __builtin_popcount(value & mask);
- if (zig_type_bit_width <= zig_bitsizeof(unsigned long))
- return __builtin_popcountl(value & mask);
- return __builtin_popcountll(value & mask);
-}
-
-static inline uint128_t zig_byte_swap(uint128_t value, uint8_t zig_type_bit_width, bool signed_type) {
- if (zig_type_bit_width <= 8) return value;
- if (zig_type_bit_width <= 16) return __builtin_bswap16(value);
- if (zig_type_bit_width <= 32) {
- const uint32_t swapped = __builtin_bswap32(value) >> (32 - zig_type_bit_width);
- return (signed_type ? zig_sign_extend(swapped, zig_type_bit_width) : swapped);
+ return __builtin_ctzll(value & zig_bit_mask(unsigned long, zig_type_bit_width));
+}
+
+#define zig_ctz_u8 zig_ctz
+#define zig_ctz_i8 zig_ctz
+#define zig_ctz_u16 zig_ctz
+#define zig_ctz_i16 zig_ctz
+#define zig_ctz_u32 zig_ctzl
+#define zig_ctz_i32 zig_ctzl
+#define zig_ctz_u64 zig_ctzll
+#define zig_ctz_i64 zig_ctzll
+
+static inline int zig_ctz_u128(uint128_t value, uint8_t zig_type_bit_width) {
+ const uint128_t mask = zig_bit_mask(uint128_t, zig_type_bit_width);
+ const uint64_t hi = (value & mask) >> 64;
+ const uint64_t lo = (value & mask);
+ return (lo != 0 ? __builtin_ctzll(lo) : 64 + (hi != 0 ? __builtin_ctzll(hi) : 64));
+}
+
+#define zig_ctz_i128 zig_ctz_u128
+
+static inline int zig_popcount(unsigned int value, uint8_t zig_type_bit_width) {
+ return __builtin_popcount(value & zig_bit_mask(unsigned int, zig_type_bit_width));
+}
+
+static inline int zig_popcountl(unsigned long value, uint8_t zig_type_bit_width) {
+ return __builtin_popcountl(value & zig_bit_mask(unsigned long, zig_type_bit_width));
+}
+
+static inline int zig_popcountll(unsigned long value, uint8_t zig_type_bit_width) {
+ return __builtin_popcountll(value & zig_bit_mask(unsigned long, zig_type_bit_width));
+}
+
+#define zig_popcount_u8 zig_popcount
+#define zig_popcount_i8 zig_popcount
+#define zig_popcount_u16 zig_popcount
+#define zig_popcount_i16 zig_popcount
+#define zig_popcount_u32 zig_popcountl
+#define zig_popcount_i32 zig_popcountl
+#define zig_popcount_u64 zig_popcountll
+#define zig_popcount_i64 zig_popcountll
+
+static inline int zig_popcount_u128(uint128_t value, uint8_t zig_type_bit_width) {
+ const uint128_t mask = zig_bit_mask(uint128_t, zig_type_bit_width);
+ const uint64_t hi = (value & mask) >> 64;
+ const uint64_t lo = (value & mask);
+ return __builtin_popcountll(hi) + __builtin_popcountll(lo);
+}
+
+#define zig_popcount_i128 zig_popcount_u128
+
+#define zig_sign_extend(T) \
+ static inline T zig_sign_extend_##T(T value, uint8_t zig_type_bit_width) { \
+ const T m = (T)1 << (T)(zig_type_bit_width - 1); \
+ return (value ^ m) - m; \
}
- if (zig_type_bit_width <= 64) {
- const uint64_t swapped = __builtin_bswap64(value) >> (64 - zig_type_bit_width);
- return (signed_type ? zig_sign_extend(swapped, zig_type_bit_width) : swapped);
+
+zig_sign_extend(uint8_t)
+zig_sign_extend(uint16_t)
+zig_sign_extend(uint32_t)
+zig_sign_extend(uint64_t)
+zig_sign_extend(uint128_t)
+
+#define zig_byte_swap_u(ZigTypeBits, CTypeBits) \
+ static inline uint##CTypeBits##_t zig_byte_swap_u##ZigTypeBits(uint##CTypeBits##_t value, uint8_t zig_type_bit_width) { \
+ return __builtin_bswap##CTypeBits(value) >> (CTypeBits - zig_type_bit_width); \
+ }
+
+#define zig_byte_swap_s(ZigTypeBits, CTypeBits) \
+ static inline int##CTypeBits##_t zig_byte_swap_i##ZigTypeBits(int##CTypeBits##_t value, uint8_t zig_type_bit_width) { \
+ const uint##CTypeBits##_t swapped = zig_byte_swap_u##ZigTypeBits(value, zig_type_bit_width); \
+ return zig_sign_extend_uint##CTypeBits##_t(swapped, zig_type_bit_width); \
}
+
+#define zig_byte_swap(ZigTypeBits, CTypeBits) \
+ zig_byte_swap_u(ZigTypeBits, CTypeBits) \
+ zig_byte_swap_s(ZigTypeBits, CTypeBits)
+
+zig_byte_swap( 8, 16)
+zig_byte_swap(16, 16)
+zig_byte_swap(32, 32)
+zig_byte_swap(64, 64)
+
+static inline uint128_t zig_byte_swap_u128(uint128_t value, uint8_t zig_type_bit_width) {
const uint128_t mask = zig_bit_mask(uint128_t, zig_type_bit_width);
const uint128_t hi = __builtin_bswap64((uint64_t)(value >> 64));
const uint128_t lo = __builtin_bswap64((uint64_t)value);
- const uint128_t swapped = (((lo << 64 | hi) >> (128 - zig_type_bit_width))) & mask;
- return (signed_type ? zig_sign_extend(swapped, zig_type_bit_width) : swapped);
-}
-
-static inline uint128_t zig_bit_reverse(uint128_t value, uint8_t zig_type_bit_width, bool signed_type) {
- static const uint128_t reverse_lut[256] = {
- 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50, 0xd0,
- 0x30, 0xb0, 0x70, 0xf0, 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
- 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 0x04, 0x84, 0x44, 0xc4,
- 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
- 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0x5c, 0xdc,
- 0x3c, 0xbc, 0x7c, 0xfc, 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
- 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, 0x0a, 0x8a, 0x4a, 0xca,
- 0x2a, 0xaa, 0x6a, 0xea, 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
- 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6,
- 0x36, 0xb6, 0x76, 0xf6, 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
- 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 0x01, 0x81, 0x41, 0xc1,
- 0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
- 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99, 0x59, 0xd9,
- 0x39, 0xb9, 0x79, 0xf9, 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
- 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, 0x0d, 0x8d, 0x4d, 0xcd,
- 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
- 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3,
- 0x33, 0xb3, 0x73, 0xf3, 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
- 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, 0x07, 0x87, 0x47, 0xc7,
- 0x27, 0xa7, 0x67, 0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
- 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf,
- 0x3f, 0xbf, 0x7f, 0xff
- };
- const uint128_t mask = zig_bit_mask(uint128_t, zig_type_bit_width);
- const uint128_t swapped = zig_byte_swap(value, zig_type_bit_width, signed_type);
+ return (((lo << 64 | hi) >> (128 - zig_type_bit_width))) & mask;
+}
+
+zig_byte_swap_s(128, 128)
+
+static const uint8_t zig_bit_reverse_lut[256] = {
+ 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50, 0xd0,
+ 0x30, 0xb0, 0x70, 0xf0, 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
+ 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 0x04, 0x84, 0x44, 0xc4,
+ 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
+ 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0x5c, 0xdc,
+ 0x3c, 0xbc, 0x7c, 0xfc, 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
+ 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, 0x0a, 0x8a, 0x4a, 0xca,
+ 0x2a, 0xaa, 0x6a, 0xea, 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
+ 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6,
+ 0x36, 0xb6, 0x76, 0xf6, 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
+ 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 0x01, 0x81, 0x41, 0xc1,
+ 0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
+ 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99, 0x59, 0xd9,
+ 0x39, 0xb9, 0x79, 0xf9, 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
+ 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, 0x0d, 0x8d, 0x4d, 0xcd,
+ 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
+ 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3,
+ 0x33, 0xb3, 0x73, 0xf3, 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
+ 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, 0x07, 0x87, 0x47, 0xc7,
+ 0x27, 0xa7, 0x67, 0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
+ 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf,
+ 0x3f, 0xbf, 0x7f, 0xff
+};
+
+static inline uint8_t zig_bit_reverse_u8(uint8_t value, uint8_t zig_type_bit_width) {
+ const uint8_t reversed = zig_bit_reverse_lut[value] >> (8 - zig_type_bit_width);
+ return zig_sign_extend_uint8_t(reversed, zig_type_bit_width);
+}
+
+#define zig_bit_reverse_i8 zig_bit_reverse_u8
+
+static inline uint16_t zig_bit_reverse_u16(uint16_t value, uint8_t zig_type_bit_width) {
+ const uint16_t swapped = zig_byte_swap_u16(value, zig_type_bit_width);
+ const uint16_t reversed = (
+ ((uint16_t)zig_bit_reverse_lut[(swapped >> 0x08) & 0xff] << 0x08) |
+ ((uint16_t)zig_bit_reverse_lut[(swapped >> 0x00) & 0xff] << 0x00));
+ return zig_sign_extend_uint16_t(
+ reversed & zig_bit_mask(uint16_t, zig_type_bit_width),
+ zig_type_bit_width);
+}
+
+#define zig_bit_reverse_i16 zig_bit_reverse_u16
+
+static inline uint32_t zig_bit_reverse_u32(uint32_t value, uint8_t zig_type_bit_width) {
+ const uint32_t swapped = zig_byte_swap_u32(value, zig_type_bit_width);
+ const uint32_t reversed = (
+ ((uint32_t)zig_bit_reverse_lut[(swapped >> 0x18) & 0xff] << 0x18) |
+ ((uint32_t)zig_bit_reverse_lut[(swapped >> 0x10) & 0xff] << 0x10) |
+ ((uint32_t)zig_bit_reverse_lut[(swapped >> 0x08) & 0xff] << 0x08) |
+ ((uint32_t)zig_bit_reverse_lut[(swapped >> 0x00) & 0xff] << 0x00));
+ return zig_sign_extend_uint32_t(
+ reversed & zig_bit_mask(uint32_t, zig_type_bit_width),
+ zig_type_bit_width);
+}
+
+#define zig_bit_reverse_i32 zig_bit_reverse_u32
+
+static inline uint64_t zig_bit_reverse_u64(uint64_t value, uint8_t zig_type_bit_width) {
+ const uint64_t swapped = zig_byte_swap_u64(value, zig_type_bit_width);
+ const uint64_t reversed = (
+ ((uint64_t)zig_bit_reverse_lut[(swapped >> 0x38) & 0xff] << 0x38) |
+ ((uint64_t)zig_bit_reverse_lut[(swapped >> 0x30) & 0xff] << 0x30) |
+ ((uint64_t)zig_bit_reverse_lut[(swapped >> 0x28) & 0xff] << 0x28) |
+ ((uint64_t)zig_bit_reverse_lut[(swapped >> 0x20) & 0xff] << 0x20) |
+ ((uint64_t)zig_bit_reverse_lut[(swapped >> 0x18) & 0xff] << 0x18) |
+ ((uint64_t)zig_bit_reverse_lut[(swapped >> 0x10) & 0xff] << 0x10) |
+ ((uint64_t)zig_bit_reverse_lut[(swapped >> 0x08) & 0xff] << 0x08) |
+ ((uint64_t)zig_bit_reverse_lut[(swapped >> 0x00) & 0xff] << 0x00));
+ return zig_sign_extend_uint64_t(
+ reversed & zig_bit_mask(uint64_t, zig_type_bit_width),
+ zig_type_bit_width);
+}
+
+#define zig_bit_reverse_i64 zig_bit_reverse_u64
+
+static inline uint128_t zig_bit_reverse_u128(uint128_t value, uint8_t zig_type_bit_width) {
+ const uint128_t swapped = zig_byte_swap_u128(value, zig_type_bit_width);
const uint128_t reversed = (
- (reverse_lut[(swapped >> 0x78) & 0xff] << 0x78) |
- (reverse_lut[(swapped >> 0x70) & 0xff] << 0x70) |
- (reverse_lut[(swapped >> 0x68) & 0xff] << 0x68) |
- (reverse_lut[(swapped >> 0x60) & 0xff] << 0x60) |
- (reverse_lut[(swapped >> 0x58) & 0xff] << 0x58) |
- (reverse_lut[(swapped >> 0x50) & 0xff] << 0x50) |
- (reverse_lut[(swapped >> 0x48) & 0xff] << 0x48) |
- (reverse_lut[(swapped >> 0x40) & 0xff] << 0x40) |
- (reverse_lut[(swapped >> 0x38) & 0xff] << 0x38) |
- (reverse_lut[(swapped >> 0x30) & 0xff] << 0x30) |
- (reverse_lut[(swapped >> 0x28) & 0xff] << 0x28) |
- (reverse_lut[(swapped >> 0x20) & 0xff] << 0x20) |
- (reverse_lut[(swapped >> 0x18) & 0xff] << 0x18) |
- (reverse_lut[(swapped >> 0x10) & 0xff] << 0x10) |
- (reverse_lut[(swapped >> 0x08) & 0xff] << 0x08) |
- (reverse_lut[(swapped >> 0x00) & 0xff] << 0x00));
- const uint128_t result =
- (reversed >> (zig_type_bit_width < 8 ? 8 - zig_type_bit_width : 0)) & mask;
- return (signed_type ? zig_sign_extend(result, zig_type_bit_width) : result);
-}
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x78) & 0xff] << 0x78) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x70) & 0xff] << 0x70) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x68) & 0xff] << 0x68) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x60) & 0xff] << 0x60) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x58) & 0xff] << 0x58) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x50) & 0xff] << 0x50) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x48) & 0xff] << 0x48) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x40) & 0xff] << 0x40) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x38) & 0xff] << 0x38) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x30) & 0xff] << 0x30) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x28) & 0xff] << 0x28) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x20) & 0xff] << 0x20) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x18) & 0xff] << 0x18) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x10) & 0xff] << 0x10) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x08) & 0xff] << 0x08) |
+ ((uint128_t)zig_bit_reverse_lut[(swapped >> 0x00) & 0xff] << 0x00));
+ return zig_sign_extend_uint128_t(
+ reversed & zig_bit_mask(uint128_t, zig_type_bit_width),
+ zig_type_bit_width);
+}
+
+#define zig_bit_reverse_i128 zig_bit_reverse_u128
test/behavior/math.zig
@@ -82,7 +82,6 @@ test "@clz big ints" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
- if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
try testClzBigInts();
comptime try testClzBigInts();
test/behavior/popcount.zig
@@ -37,6 +37,10 @@ fn testPopCountIntegers() !void {
var x: i8 = -120;
try expect(@popCount(i8, x) == 2);
}
+ {
+ var x: u128 = 0b11111111000110001100010000100001000011000011100101010001;
+ try expect(@popCount(u128, x) == 24);
+ }
comptime {
try expect(@popCount(u8, @bitCast(u8, @as(i8, -120))) == 2);
}