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Having the -mfused-madd option honored


Hi,

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 options.

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.

Cheers,

Serge Torres

PS : IBM XL V 9 works (as matter of fact, with no particular option)


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