Florian Klaempfl pisze:
Jonas Maebe schrieb:
On 29 Nov 2008, at 11:11, Felipe Monteiro de Carvalho wrote:
You can tell FPC to do the SSE code for you:
-Cf<x> Select fpu instruction set to use, see fpc -i for
possible values
That only applies to (scalar) FPU operations at this time. It won't do
any (auto or other) vectorisation.
With -Sv -Cfsse2 you can compile things like
I know this, but its hard to discover where and when is is used. Often
is good, when compiler make optimization itself, but some times is
better tell them about possible vectorization.
function f : double;
var
d1,d2,d3 : array[0..1] of double;
begin
d1:=d2*d3;
end;
I would expect some thing like this
type
tSSEvector= packed record of
a,b : double;
end;
{ or }
tSSEvector= array[0..1] of double;
function f : double;
var
d1,d2,d3 : tSSEVector;
begin
d1:=d2*d3;
end;
Of course tSSEVector should be declared in System unit.
Then any one can use SSE intentionally.
However, it's not well tested.
Is there a list of SSE function, which can FPC use?
Darek
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