MMX instruction for
logical and not.
Unlike most
MMX instructions, PAND doesn't operate on packed data. Instead, it operates on bits. A
MMX register or
64 bit memory location is inverted, and combined with a MMX register (also inverted) using logical and. This would ordinarily require lots of MMX instructions:
pcmpeqb mm7, mm7
pxor mm7, mm0
pxor mm7, mm1
pand mm0, mm1
AT&T instruction ordering used: operator, source, destination.
Compare
POR,
PAND,
PXOR