On Mon, Jan 19, 2015 at 4:41 AM, Alexis Ballier <aball...@gentoo.org> wrote:
> On Sun, 18 Jan 2015 15:15:22 -0800 > Matt Turner <matts...@gentoo.org> wrote: > > > 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) padlock - Use VIA padlock instructions popcnt - Enable > > > popcnt instruction support sse - Use the SSE instruction set > > > sse2 - Use the SSE2 instruction set > > > sse3 - Use the SSE3 instruction set (pni in cpuinfo) > > > sse4 - Enable SSE4 instruction support > > > > We shouldn't have an sse4 USE flag. It's either one of the three > > below, but SSE4 by itself isn't a thing. > > wikipedia says it is sse4.1 + sse4.2 > Some CPUs don't have 4.2, and some don't have 4a. You'd still need the separate flags, so an extraneous combined flag is a bit silly.
