Float values are wrong in union

[Engine Machine via Digitalmars-d-learn]

On Monday, 22 August 2016 at 05:02:41 UTC, jkpl wrote:
> On Monday, 22 August 2016 at 04:52:40 UTC, Cauterite wrote:
>> [...]
>
> That's a 32 bit codegen issue then because DMD64 's disasm 
> shows that SSE regs are used:
>
> ====
> void foo()
> {
>     union test { int i; float f; }
>     test t = { i : 0x7fb00000};
>     float t2 = t.f;
>     test t3 = { f : t2 };
> }
> ===
>
> yields to
>
> ===
> 00000000004586D0h  push rbp
> 00000000004586D1h  mov rbp, rsp
> 00000000004586D4h  sub rsp, 10h
> 00000000004586D8h  mov dword ptr [rbp-10h], 7FB00000h
> 00000000004586DFh  movss xmm0, dword ptr [rbp-10h]
> 00000000004586E4h  movss dword ptr [rbp-0Ch], xmm0
> 00000000004586E9h  movss xmm1, dword ptr [rbp-0Ch]
> 00000000004586EEh  movss dword ptr [rbp-08h], xmm1
> 00000000004586F3h  leave
> 00000000004586F4h  ret
> ===

x86 give 7FF and x64 gives 7FB in win.