Re: benchmark

On 2004-09-15T02:27:44-0400, Atom 'Smasher' wrote:
> On Wed, 15 Sep 2004, Justin Guyett wrote:
> 
> > I get that, too, when I let gentoo compile hashcash.  It ends up
> > building with these flags:
> >
> > -O3 -march=pentium3 -pipe -fomit-frame-pointer -O3    -c
> >
> > it works fine with the default flags for "make x86", namely
> >
> > -DREGEXP_POSIX -O3 -funroll-loops -march=i386 -mcpu=pentium -mmmx
> > -D_REENTRANT -D_THREAD_SAFE -fPIC    -c
> 
> hhmmm... my build is with different flags (on freeBSD)...

It seems that it's -march=pentium3 that's triggering the bug.

Using those exact flags (-march=i386 and -S instead of -c), attachment 1
is the assembly code gcc generates.

Using -march=pentium3 (and leaving everything else the same, including
-mcpu), attachment 2 is the assembly code gcc generates.

.Sb means broken, .Sw means working.

Both were generated with the latest stable gentoo gcc, gcc 3.3.4-r1,
ssp-3.3.2-2, pie-8.7.6.  The source is vanilla 1.08.