x86 -ffast-math problem on SPEC CPU 2K

[Dale Johannesen]

On Feb 23, 2006, at 8:54 AM, H. J. Lu wrote:

> When I use -O2 -mtune=pentium4 -ffast-math on SPEC CPU 2K on Linux/x86
> with gcc 4.2, I get
>
> *** Miscompare of 200.s, see
> /export/spec/src/2000/spec/benchspec/CINT2000/176.gcc/run/00000004/ 
> 200.s.mis
> *** Miscompare of scilab.s, see
> /export/spec/src/2000/spec/benchspec/CINT2000/176.gcc/run/00000004/ 
> scilab.s.mis
>
> Is that a known issue?

This is what you get if the benchmark source thinks the host is of the  
wrong endianness.
Do you have -DHOST_WORDS_BIG_ENDIAN in your config file perhaps?