Restrict SSE instruction set

Question

I want my compiler to use only instructions of the specified version of SSE.

For now, looks like -msse2 -mno-sse3 -mno-sse4 -mno-sse41 -mno-sse42 does it, however I'm looking for something like -monly-sse2 .

Answer 1

除非您指定-msse3 / -march=<cpu-with-sse3>否则在x86-64 -march=<cpu-with-sse3>仅使用SSE2（甚至在x86上使用更低的指令集）。