[fpc-devel] SSE in FPC

[Dariusz Mazur]

Florian Klaempfl pisze:
> Dariusz Mazur schrieb:
>   
>> Jonas Maebe pisze:
>>     
>>>> Of course tSSEVector should be declared in System unit.
>>>> Then  any one can use SSE intentionally
>>>>         
>>> Why can't you now? It's not like multiplication has any other meaning
>>> for arrays. And declaring "magic compiler types" in the system unit is
>>> something that should be avoided as much as possible (it makes both
>>> the compiler and rtl harder to adapt and understand).
>>>       
>> Of course, but SIMD is thing, which has  more and more impact to
>> performance. And compiler should respect it (and do this, as Florian
>> said). But till now nobody know, where compiler use SSE instruction. 
>>     
>
> Of course one knows. For array operations as shown SSE/SSE2 is used if
> enabled.
> _______________________________________________
>   
Ok. I only want to discover how to use it.
if I write

  type
           tSSEVector = array[0..1] of double
 var
      d1 : tSSeVector;
     d2  : array[0..1]of tSSEVector;
 begin
   d1:=d2[0]*d2[1];
end;

will be work too?

Or something like this:

function f ;

 var

   d1,d2,d3 : array[0..4] of integer;
begin

     d1:=d2*d3;

 end;







-- 
  Darek