This is the mail archive of the
mailing list for the GCC project.
Having the -mfused-madd option honored
- From: Serge Torres <Serge dot Torres at ens-lyon dot fr>
- To: gcc-help at gnu dot org
- Date: Wed, 07 Nov 2007 15:05:17 +0100
- Subject: Having the -mfused-madd option honored
I'm using gcc 4.1.2 on an openPower 720 (Power5 processors) box running
Linux OpenSUSE 10.2.
I would like to compile a C program with the fused multiply-add and
multiply-sub instructions enabled. I can't figure out the right set of
I've been trying many combinations of -mcpu=power5, -mhard-float,
-mfused-madd, -m64 but none has worked yet.
An idea any one? Or even better: a personnal successful experience.
PS : IBM XL V 9 works (as matter of fact, with no particular option)