Commit de3b22db4d

@@ -239,7 +239,6 @@ pub fn fromPosixSignalContext(ctx_ptr: ?*const anyopaque) ?Native {
         .s390x => switch (builtin.os.tag) {
             .linux => .{
                 .r = uc.mcontext.gregs,
-                .f = uc.mcontext.fregs,
                 .psw = .{
                     .mask = uc.mcontext.psw.mask,
                     .addr = uc.mcontext.psw.addr,
@@ -1029,8 +1028,6 @@ pub const Riscv = extern struct {
 pub const S390x = extern struct {
     /// The numbered general-purpose registers r0 - r15.
     r: [16]u64,
-    /// The numbered floating-point registers f0 - f15. Yes, really - they can be used in DWARF CFI.
-    f: [16]f64,
     /// The program counter.
     psw: extern struct {
         mask: u64,
@@ -1041,26 +1038,10 @@ pub const S390x = extern struct {
         var ctx: S390x = undefined;
         asm volatile (
             \\ stmg %%r0, %%r15, 0(%%r2)
-            \\ std %%f0, 128(%%r2)
-            \\ std %%f1, 136(%%r2)
-            \\ std %%f2, 144(%%r2)
-            \\ std %%f3, 152(%%r2)
-            \\ std %%f4, 160(%%r2)
-            \\ std %%f5, 168(%%r2)
-            \\ std %%f6, 176(%%r2)
-            \\ std %%f7, 184(%%r2)
-            \\ std %%f8, 192(%%r2)
-            \\ std %%f9, 200(%%r2)
-            \\ std %%f10, 208(%%r2)
-            \\ std %%f11, 216(%%r2)
-            \\ std %%f12, 224(%%r2)
-            \\ std %%f13, 232(%%r2)
-            \\ std %%f14, 240(%%r2)
-            \\ std %%f15, 248(%%r2)
             \\ epsw %%r0, %%r1
-            \\ stm %%r0, %%r1, 256(%%r2)
+            \\ stm %%r0, %%r1, 128(%%r2)
             \\ larl %%r0, .
-            \\ stg %%r0, 264(%%r2)
+            \\ stg %%r0, 136(%%r2)
             \\ lg %%r0, 0(%%r2)
             \\ lg %%r1, 8(%%r2)
             :
@@ -1072,26 +1053,10 @@ pub const S390x = extern struct {
     pub fn dwarfRegisterBytes(ctx: *S390x, register_num: u16) DwarfRegisterError![]u8 {
         switch (register_num) {
             0...15 => return @ptrCast(&ctx.r[register_num]),
-            // Why???
-            16 => return @ptrCast(&ctx.f[0]),
-            17 => return @ptrCast(&ctx.f[2]),
-            18 => return @ptrCast(&ctx.f[4]),
-            19 => return @ptrCast(&ctx.f[6]),
-            20 => return @ptrCast(&ctx.f[1]),
-            21 => return @ptrCast(&ctx.f[3]),
-            22 => return @ptrCast(&ctx.f[5]),
-            23 => return @ptrCast(&ctx.f[7]),
-            24 => return @ptrCast(&ctx.f[8]),
-            25 => return @ptrCast(&ctx.f[10]),
-            26 => return @ptrCast(&ctx.f[12]),
-            27 => return @ptrCast(&ctx.f[14]),
-            28 => return @ptrCast(&ctx.f[9]),
-            29 => return @ptrCast(&ctx.f[11]),
-            30 => return @ptrCast(&ctx.f[13]),
-            31 => return @ptrCast(&ctx.f[15]),
             64 => return @ptrCast(&ctx.psw.mask),
             65 => return @ptrCast(&ctx.psw.addr),
 
+            16...31 => return error.UnsupportedRegister, // f0 - f15
             48...63 => return error.UnsupportedRegister, // a0 - a15
             68...83 => return error.UnsupportedRegister, // v16 - v31