Re: Benchmark of gcc 4.0

2005-02-24 Thread Uros Bizjak
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-

Re: Benchmark of gcc 4.0

2005-02-24 Thread Biagio Lucini
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): >

Re: Benchmark of gcc 4.0

2005-02-24 Thread Richard Guenther
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

Re: Benchmark of gcc 4.0

2005-02-24 Thread Biagio Lucini
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

Re: Benchmark of gcc 4.0

2005-02-24 Thread Richard Guenther
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

Re: Benchmark of gcc 4.0

2005-02-24 Thread Paolo Bonzini
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

Re: Benchmark of gcc 4.0

2005-02-24 Thread Vladimir Makarov
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

Benchmark of gcc 4.0

2005-02-24 Thread Biagio Lucini
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