Re: GCC Benchmarks (coybench), AMD64 and i686, 14 August 2004

[Scott Robert Ladd <coyote at coyotegulch dot com>]

Scott Robert Ladd wrote:
> Compiled with -march=opteron, GCC 3.5 has a perfect paranoia score. 
> Adding -O3 does *not* introduce any errors on the Opteron; adding 
> -ffast-math results in a *single* minor "flaw".

A minor clarification:

*BOTH* GCC 3.4 and 3.5 achieve a perfect score on the Opteron, with or 
without any -O? optimization switch. When -ffast-math (actually, 
-funsafe-math-optimizations) is added, GCC 3.4 gains a single flaw, 
while 3.5 gains one defect and two flaws. I'll try to track this down 
and report it as a regression against 3.5.

--
Scott Robert Ladd
Coyote Gulch Productions (http://www.coyotegulch.com)
Software Invention for High-Performance Computing