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Re: FSF-GCC-2.7.2 vs EGCS-GCC-971008 on Ultra (more info)
- To: Oleg Krivosheev <kriol at waldo dot fnal dot gov>
- Subject: Re: FSF-GCC-2.7.2 vs EGCS-GCC-971008 on Ultra (more info)
- From: Oleg Krivosheev <kriol at fnal dot gov>
- Date: Tue, 14 Oct 1997 23:23:50 -0500 (CDT)
- cc: egcs at cygnus dot com
On Tue, 14 Oct 1997, Fred Richardson wrote:
> Hi-
>
> Here's a brief update on my previous email.
>
> I've built and installed EGCS-971008 with the following flags:
> --enable-haifa=yes --with-gnu-as --with-gnu-ld --with-stabs
> on a Model 170 UltraSPARC running Solaris 2.5
>
> I compiled a program with the following flags:
>
> -mcpu=ultrasparc -funsigned-char -fno-exceptions -O6
> -finline-functions -ffast-math -fomit-frame-pointer
> -funroll-loops
>
> The speed of the program (which does a lot of floating point) was
> about the same as when I compiling it with FSF-GCC-2.7.2 and these
> flags:
>
> -O3 -finline-functions -ffast-math -fomit-frame-pointer
> -funroll-loops
>
> I haven't re-run this test with the SUNW cc yet. I don't know if this
k
just for you information, i've tried MDBENCH - molecular
dynamic FP intensive Fortran code:
On 200mhz Ultra-II box timings were:
- 16.5sec native sun f77 v4.2
- 17.6sec egcs g77 with haifa and max.optimization (f2c+egcs-gcc was the
same )
- 19.8sec f2c+gcc-2.7.2
regards
OK