Matus UHLAR - fantomas wrote:
Are you sure? 3DNow! instructions are vector instructions, they aren't
usually used in ordinary code. -march=athlon64 (and k6,k7/athlon) doesn't
necessarily mean that the gcc will use those instructions...
Why wouldn't if suitable?
From gcc manual:
k8, opteron, athlon64, athlon-fx
AMD K8 core based CPUs with x86-64 instruction set support. (This
supersets MMX, SSE, SSE2, 3dNOW!, enhanced 3dNOW! and 64-bit instruction
set extensions.)
http://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/i386-and-x86_002d64-Options.html
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