D ASM. Program fails

[userABCabc123 via Digitalmars-d-learn]

On Friday, 22 January 2016 at 20:54:46 UTC, Iakh wrote:
> On Friday, 22 January 2016 at 17:27:35 UTC, userABCabc123 wrote:
>> [...]
>
> Thanks. It works.
> Buth shorter version too:
>
>                 asm
>                 {
>                     naked;
>                     push RBP;
>                     mov RBP, RSP;
>                     //sub RSP, 0x10;
>                     //movdqa dword ptr[RBP-0x10], XMM0;
>                     //movdqa XMM0, dword ptr[RBP-0x10];
>                     pmovmskb EAX, XMM0;
>                     mov RSP, RBP;
>                     pop RBP;
>                     ret;
>                 }
>
> Looks like the SIMD param is passed by SIMD reg

Right I must be blind. So you can even remove the prelude and the 
prologue:

int pmovmskb2(byte16 v)
{
     asm
     {
         naked;
         pmovmskb EAX, XMM0;
         ret;
     }
}