MMX Instructions

32 x86 instructions in this extension - click any row for encoding, pseudocode, and full documentation.

Mnemonic ⇅	Syntax	Format ⇅	Summary
emms	EMMS	MMX	Clears the FPU tag word to allow FP instructions after MMX.
maskmovq	MASKMOVQ mm1, mm2	MMX	Non-temporal store of selected MMX bytes.
movq	MOVQ mm, mm/m64	MMX	Moves 64-bit data between MMX registers/memory.
paddsb	PADDSB mm, mm/m64	MMX	Adds 8 signed bytes with saturation (MMX).
paddsw	PADDSW mm, mm/m64	MMX	Adds 4 signed words with saturation (MMX).
paddusb	PADDUSB mm, mm/m64	MMX	Adds 8 unsigned bytes with saturation (MMX).
paddusw	PADDUSW mm, mm/m64	MMX	Adds 4 unsigned words with saturation (MMX).
pand	PAND mm, mm/m64	MMX	Bitwise AND of 64-bit MMX registers.
pandn	PANDN mm, mm/m64	MMX	Bitwise AND NOT of 64-bit MMX registers.
pcmpeqb	PCMPEQB mm, mm/m64	MMX	Compares bytes for equality (MMX).
pcmpeqd	PCMPEQD mm, mm/m64	MMX	Compares doublewords for equality (MMX).
pcmpeqw	PCMPEQW mm, mm/m64	MMX	Compares words for equality (MMX).
pcmpgtb	PCMPGTB mm, mm/m64	MMX	Compares bytes for greater than (MMX).
pcmpgtd	PCMPGTD mm, mm/m64	MMX	Compares doublewords for greater than (MMX).
pcmpgtw	PCMPGTW mm, mm/m64	MMX	Compares words for greater than (MMX).
pmaddwd	PMADDWD mm, mm/m64	MMX	Multiplies words and adds adjacent pairs (MMX).
pmulhw	PMULHW mm, mm/m64	MMX	Multiplies 4 signed words and stores high 16 bits (MMX).
pmullw	PMULLW mm, mm/m64	MMX	Multiplies 4 words and stores low 16 bits (MMX).
por	POR mm, mm/m64	MMX	Bitwise OR of 64-bit MMX registers.
pslld	PSLLD mm, imm8	MMX	Shifts doublewords left (MMX).
psllq	PSLLQ mm, imm8	MMX	Shifts quadword left (MMX).
psllw	PSLLW mm, imm8	MMX	Shifts words left (MMX).
psrad	PSRAD mm, imm8	MMX	Shifts doublewords right arithmetic (MMX).
psraw	PSRAW mm, imm8	MMX	Shifts words right arithmetic (MMX).
psrld	PSRLD mm, imm8	MMX	Shifts doublewords right logical (MMX).
psrlq	PSRLQ mm, imm8	MMX	Shifts quadword right logical (MMX).
psrlw	PSRLW mm, imm8	MMX	Shifts words right logical (MMX).
psubsb	PSUBSB mm, mm/m64	MMX	Subtracts 8 signed bytes with saturation (MMX).
psubsw	PSUBSW mm, mm/m64	MMX	Subtracts 4 signed words with saturation (MMX).
psubusb	PSUBUSB mm, mm/m64	MMX	Subtracts 8 unsigned bytes with saturation (MMX).
psubusw	PSUBUSW mm, mm/m64	MMX	Subtracts 4 unsigned words with saturation (MMX).
pxor	PXOR mm, mm/m64	MMX	Bitwise XOR of 64-bit MMX registers.