PIII-IV SSE instructions set

PIII-IV SSE instructions set

[Rodrigo F. Baroni]

Hello all,

    Does anybody knows if is possible to code in a
linux enviroment using the PIII-IV SSE (Stream SIMD
Extend) instructions set ?

    Some examples of SSE instructions are :

addps, addss
subps, subss
mulps, mulss
divps, divss
sqrtps, sqrtss
maxps, maxss
minps, minss
(...)

   And a code example follows  :

asm {
	push esi;
	push edi;
	; a is loaded into xmm1
	; b is loaded into xmm2
	mov xmm0, xmm1;
	mulps xmm0, xmm2;
	; store result into c
	pop edi;
        pop esi;
}


     Thanks a lot,

   Rodrigo F Baroni
Computer Science Bach's student.
 Sp, Brazil



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Re: PIII-IV SSE instructions set

[Maciej Hrebien]

"Rodrigo F. Baroni" wrote:
> 
> Hello all,
> 
>     Does anybody knows if is possible to code in a
> linux enviroment using the PIII-IV SSE (Stream SIMD
> Extend) instructions set ?

Yes, it's possible if you have a kernel configured/compiled right so you
won't get "illegal instruction" while running your code and a cpu with
sse ;)
 
-- 
Maciej Hrebien

Re: PIII-IV SSE instructions set

[Maciej Hrebien]

"Rodrigo F. Baroni" wrote:
> 
> 
>    Little correction, :
> 
> >         #;---- here starts the sse instructions
> >         #; a is loaded into xmm1
> >         #; b is loaded into xmm2
> >         mov %xmm0, %xmm1;
>               ^      ^
> >         mulps %xmm0, %xmm2;
>                 ^      ^

mov isn't sse instr! Try movaps.

-- 
Maciej Hrebien