A.5.235 PMINSW: Packed Signed Integer Word Minimum
PMINSW mm1,mm2/m64 ; 0F EA /r [KATMAI,MMX]
PMINSW xmm1,xmm2/m128 ; 66 0F EA /r [WILLAMETTE,SSE2]
PMINSW compares each pair of words in the two source operands, and for
each pair it stores the minimum value in the destination register.