PMULHW
Usage: PMULHW dest,src Modifies flags: None
Performs an SIMD signed multiply of the packed signed word integers in the 'dest' and the 'src', and stores the high 16 bits of each intermediate 32-bit result in the 'dest' operand.
Multiply Packed 16-bit Integers, and Store
PMULHW mm1,mm2/m64 ; 0F E5 /r [PENT,MMX]
PMULLW mm1,mm2/m64 ; 0F D5 /r [PENT,MMX]
PMULHW xmm1,xmm2/m128 ; 66 0F E5 /r [WILLAMETTE,SSE2]
PMULLW xmm1,xmm2/m128 ; 66 0F D5 /r [WILLAMETTE,SSE2]
PMULxW takes two packed unsigned 16-bit integer inputs, and multiplies the values in the inputs, forming doubleword results.
PMULHW then stores the top 16 bits of each doubleword in the destination (first) operand;
PMULLW stores the bottom 16 bits of each doubleword in the destination operand.
The 'src' operand can be an MMX technology register or a 64-bit memory location, or it can be an XMM register or a 128-bit memory location. The destination operand can be an MMX technology register or an XMM register.
EXAMPLE:
pmulhw xmm1 Label