A.5.205 PAVGB PAVGW: Average Packed Integers
PAVGB mm1,mm2/m64 ; 0F E0 /r [KATMAI,MMX]
PAVGW mm1,mm2/m64 ; 0F E3 /r [KATMAI,MMX,SM]
PAVGB xmm1,xmm2/m128 ; 66 0F E0 /r [WILLAMETTE,SSE2]
PAVGW xmm1,xmm2/m128 ; 66 0F E3 /r [WILLAMETTE,SSE2]
PAVGB and PAVGW add the unsigned data elements of the source operand
to the unsigned data elements of the destination register, then adds
1 to the temporary results. The results of the add are then each
independently right-shifted by one bit position. The high order bits of
each element are filled with the carry bits of the corresponding sum.
- PAVGB operates on packed unsigned bytes, and
- PAVGW operates on packed unsigned words.