Author: Matt Taylor
Date: 05:15:15 12/03/02
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<snip> >With mmx there is some trouble with the 64-bit twos-complement, because there is >no paddq: <snip> There is a paddq, just not in MMX. Intel's SSE 2 extensions support a paddq instruction that operates on the MMX registers -- unfortunately only available to Pentium 4 right now. (SSE 2 can be detected via bit 26 in CPU feature flags from edx register after cpuid vector 1.) -Matt
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