On Fri, Jun 29, 2012 at 5:20 PM, Alan Coopersmith <alan.coopersm...@oracle.com> wrote: > On 06/29/12 01:44 PM, Søren Sandmann Pedersen wrote: >> I was looking at making use of some of the newer x86 SIMD instruction >> sets and realized that (a) we don't ever call cpuid on x86-64, we just >> assume that MMX and SSE2 are present, > > I thought the amd64 ABI guaranteed MMX & SSE2 would always be present - is > that not the case?
SSE2 seems to be required by the ABI, but I don't know why MMX would (maybe x87 FPU is, and by extension MMX?). I'm guessing here -- but since newer AMD chips dropped 3DNow, I would think it'd be possible for future chips to drop MMX as well. _______________________________________________ Pixman mailing list Pixman@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/pixman
