MMX Technology Packed Arithmetic Intrinsics

Microsoft Specific

The intrinsics listed in the following table are followed by a description of each intrinsic.

MMX intrinsics use the __m64 data type, which is not supported on x64 processors.

The header file mmintrin.h contains the declarations for the MMX intrinsics.

Packed Arithmetic Intrinsics

Intrinsic name	Operation	Signed	Argument and result values/bits	Corresponding instruction
_mm_add_pi8	Adds	Not applicable	8/8, 8/8	PADDB
_mm_add_pi16	Adds	Not applicable	4/16, 4/16	PADDW
_mm_add_pi32	Adds	Not applicable	2/32, 2/32	PADDD
_mm_adds_pi8	Adds	Yes	8/8, 8/8	PADDSB
_mm_adds_pi16	Adds	Yes	4/16, 4/16	PADDSW
_mm_adds_pu8	Adds	No	8/8, 8/8	PADDUSB
_mm_adds_pu16	Adds	No	4/16, 4/16	PADDUSW
_mm_sub_pi8	Subtracts	Not applicable	8/8, 8/8	PSUBB
_mm_sub_pi16	Subtracts	Not applicable	4/16, 4/16	PSUBW
_mm_sub_pi32	Subtracts	Not applicable	2/32, 2/32	PSUBD
_mm_subs_pi8	Subtracts	Yes	8/8, 8/8	PSUBSB
_mm_subs_pi16	Subtracts	Yes	4/16, 4/16	PSUBSW
_mm_subs_pu8	Subtracts	No	8/8, 8/8	PSUBUSB
_mm_subs_pu16	Subtracts	No	4/16, 4/16	PSUBUSW
_mm_madd_pi16	Multiplies	Not applicable	4/16, 2/32	PMADDWD
_mm_mulhi_pi16	Multiplies	Yes	4/16, 4/16 (high)	PMULHW
_mm_mullo_pi16	Multiplies	Not applicable	4/16, 4/16 (low)	PMULLW

END Microsoft Specific