Juliusz Chroboczek <[EMAIL PROTECTED]> writes: > Note that this is on core 2, which has magnificent SSE performance. > I haven't tried it, but I'm willing to bet that on Pentium-M and > Pentium 4, the results are similar for SSE and MMX.
Actually they are not, but that's because gcc 4 generates much worse code for MMX than it does for SSE2. The generated MMX code includes bizarre stuff like this: movq %mm0, -24(%ebp) movq -24(%ebp), %mm0 psllq $16, %mm0 movq -24(%ebp), %mm1 Soren _______________________________________________ xorg mailing list xorg@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/xorg