SIMD

MMX / iSSE latency

April 25, 2000 - By Stefano Tommesani

The following table summarizes the latencies of MMX/iSSE instructions on the Intel Pentium III and Pentium 4 processors, and on the AMD Athlon processor:

Instruction	Pentium III	Pentium 4	AMD Athlon
MOVD mm,r32	1	2	3
MOVD r32,mm	1	5	5
MOVQ mm,mm	1	6	2
PACKSSWB / PACKSSDW / PACKUSWB mm,mm	1	2	2
PADDB / PADDW / PADDD	1	2	2
PADDSB / PADDSW / PADDUSB / PADDUSW mm,mm	1	2	2
PAND / PANDN/ POR / PXOR mm,mm	1	2	2
PCMPEQB / PCMPEQW / PCMPEQD mm,mm	1	2	2
PCMPGTB / PCMPGTW / PCMPGTD mm,mm	1	2	2
PMADDWD mm,mm	3	8	3
PMULHW / PMULLW / PMULHUW mm,mm	3	8	3
PSLLW / PSLLW / PSLLQ mm,mm/imm8	1	2	2
PSRAW / PSRAD mm,mm/imm8	1	2	2
PSUBB / PSUBW / PSUBD mm,mm	1	2	2
PSUBSB / PSUBSW / PSUBUSB / PSUBUSW mm,mm	1	2	2
PUNPCKHBW / PUNPCKHWD / PUNPCKHDQ mm,mm	1	2	2
PUNPCKLBW / PUNPCKLWD / PUNPCKLDQ mm,mm	1	2	2
EMMS	6	12	2
PAVGB / PAVGW mm,mm	1	2	2
PEXTRW r32,mm,imm8	2	7	7
PINSRW mm,r32,imm8	4	4	5
PMAX / PMIN mm,mm	1	2	2
PMOVMSKB r32,mm	1	7	6
PSADBW mm,mm	5	4	3
PSHUFW mm,mm,imm8	1	2	2