And at the same time, clean up the descriptions of the other flags. The existing descriptions were clearly copy-and-pasted and contained things like "faster floating point optimization for SSSE3 capable chips" when SSSE3 didn't add any floating point instructions.
3dnow: Use the 3DNow! instruction set 3dnowext: Use the Enhanced 3DNow! instruction set mmx: Use the MMX instruction set mmxext: Use the Extended MMX instruction set (intersection of Enhanced 3DNow! and SSE instruction sets) (3dnowext or sse in cpuinfo) sse: Use the SSE instruction set sse2: Use the SSE2 instruction set sse3: Use the SSE3 instruction set (pni in cpuinfo) ssse3: Use the SSSE3 instruction set sse4_1: Use the SSE 4.1 instruction set avx: Use the AVX instruction set avx2: Use the AVX2 instruction set I'll make these changes in a few days. We don't seem to have a use of an sse4_2 USE flag anywhere yet, notably. Unfortunately we do have two uses of "sse4", which should be corrected to be more specific: media-libs/freeverb3 net-misc/bfgminer
