Hello!
I just got interested and did a test myself. Comparing gcc 4.0 (-O2
-funroll-loops -D__NO_MATH_INLINES -ffast-math -march=pentium4
-mfpmath=sse -ftree-vectorize)
and icc 9.0 beta (-O3 -xW -ip):
Here are the results of scimark with '-O3 -march=pentium4 -mfpmath=...
-funroll-loops -ftree-
On Thursday 24 February 2005 17.06, Richard Guenther wrote:
> I just got interested and did a test myself. Comparing gcc 4.0 (-O2
> -funroll-loops -D__NO_MATH_INLINES -ffast-math -march=pentium4
> -mfpmath=sse -ftree-vectorize)
> and icc 9.0 beta (-O3 -xW -ip):
>
On Thu, 24 Feb 2005 17:09:46 +0100, Biagio Lucini <[EMAIL PROTECTED]> wrote:
> On Thursday 24 February 2005 16.52, Paolo Bonzini wrote:
> >
> > Try these five combinations:
> >
> [...]
> >
> > -O3 -fomit-frame-pointer -ffast-math -fno-tree-pre
>
> [...]
>
> This + 387 math is the one with the lar
On Thursday 24 February 2005 16.52, Paolo Bonzini wrote:
>
> Try these five combinations:
>
[...]
>
> -O3 -fomit-frame-pointer -ffast-math -fno-tree-pre
[...]
This + 387 math is the one with the larger impact: it rises MC to around 80,
but composite is still 279 (vs. ~ 345 for GCC 3.4). I will t
I just got interested and did a test myself. Comparing gcc 4.0 (-O2
-funroll-loops -D__NO_MATH_INLINES -ffast-math -march=pentium4
-mfpmath=sse -ftree-vectorize)
and icc 9.0 beta (-O3 -xW -ip):
gcc 4.0 icc 9.0
Composite Score: 543.65609.20
FFT
For GCC, I used in both cases the flags
-march=pentium4 -mfpmath=sse -O3 -fomit-frame-pointer -ffast-math
>
As for gcc4 vs gcc3.4, degradataion on x86 architecture is most
probably because of higher register pressure created with more
aggressive SSA optimizations in gcc4.
Try these five combinat
Biagio Lucini wrote:
I run for my personal pleasure (since I am a number cruncher) the
Scimark2 tests on my P4 Linux machine. I tested GCC 4.0 (today's CVS) vs. GCC
3.4.1 vs. Intel's ICC 8.1
For GCC, I used in both cases the flags
-march=pentium4 -mfpmath=sse -O3 -fomit-frame-pointer -ffast-math
I run for my personal pleasure (since I am a number cruncher) the
Scimark2 tests on my P4 Linux machine. I tested GCC 4.0 (today's CVS) vs. GCC
3.4.1 vs. Intel's ICC 8.1
For GCC, I used in both cases the flags
-march=pentium4 -mfpmath=sse -O3 -fomit-frame-pointer -ffast-math
Should be of some in