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Best options for 64-bit FP on athlon?
- From: Brad Lucier <lucier at math dot purdue dot edu>
- To: gcc at gcc dot gnu dot org
- Cc: lucier at math dot purdue dot edu (Brad Lucier)
- Date: Thu, 10 Jan 2002 18:38:42 -0500 (EST)
- Subject: Best options for 64-bit FP on athlon?
I have a lot of FP code where the algorithms depend on setting the precision
to 64-bits (i.e., no extended precision) for correctness. Since I've
heard great things on the mail lists about MMX/SSE/SSE2/... doing
64-bit FP faster, I want to try it.
But reading the 3.1 docs, I cannot figure out what options to give to
get what I want. Now, maybe I missed something, but I don't think
it's there. So perhaps someone can tell me what I sould do when
/proc/cpuinfo says
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr syscall mmxext 3dnowext 3dnow
Brad