MMX™ Technology Shift Intrinsics

The prototypes for MMX™ technology shift intrinsics are in the mmintrin.h header file.

Intrinsic Name	Operation	Corresponding MMX™ Instruction
_mm_sll_pi16	Logical shift left	PSLLW
_mm_slli_pi16	Logical shift left	PSLLWI
_mm_sll_pi32	Logical shift left	PSLLD
_mm_slli_pi32	Logical shift left	PSLLDI
_mm_sll_pi64	Logical shift left	PSLLQ
_mm_slli_pi64	Logical shift left	PSLLQI
_mm_sra_pi16	Arithmetic shift right	PSRAW
_mm_srai_pi16	Arithmetic shift right	PSRAWI
_mm_sra_pi32	Arithmetic shift right	PSRAD
_mm_srai_pi32	Arithmetic shift right	PSRADI
_mm_srl_pi16	Logical shift right	PSRLW
_mm_srli_pi16	Logical shift right	PSRLWI
_mm_srl_pi32	Logical shift right	PSRLD
_mm_srli_pi32	Logical shift right	PSRLDI
_mm_srl_pi64	Logical shift right	PSRLQ
_mm_srli_pi64	Logical shift right	PSRLQI

_mm_sll_pi16

__m64 _mm_sll_pi16(__m64 m, __m64 count);

Shifts four 16-bit values in m left the amount specified by count while shifting in zeros.

_mm_slli_pi16

__m64 _mm_slli_pi16(__m64 m, int count);

Shifts four 16-bit values in m left the amount specified by count while shifting in zeros. For the best performance, count should be a constant.

_mm_sll_pi32

__m64 _mm_sll_pi32(__m64 m, __m64 count);

Shifts two 32-bit values in m left the amount specified by count while shifting in zeros.

_mm_slli_pi32

__m64 _mm_slli_pi32(__m64 m, int count);

Shifts two 32-bit values in m left the amount specified by count while shifting in zeros. For the best performance, count should be a constant.

_mm_sll_pi64

__m64 _mm_sll_pi64(__m64 m, __m64 count);

Shifts the 64-bit value in m left the amount specified by count while shifting in zeros.

_mm_slli_pi64

__m64 _mm_slli_pi64(__m64 m, int count);

Shifts the 64-bit value in m left the amount specified by count while shifting in zeros. For the best performance, count should be a constant.

_mm_sra_pi16

__m64 _mm_sra_pi16(__m64 m, __m64 count);

Shifts four 16-bit values in m right the amount specified by count while shifting in the sign bit.

_mm_srai_pi16

__m64 _mm_srai_pi16(__m64 m, int count);

Shifts four 16-bit values in m right the amount specified by count while shifting in the sign bit. For the best performance, count should be a constant.

_mm_sra_pi32

__m64 _mm_sra_pi32(__m64 m, __m64 count);

Shifts two 32-bit values in m right the amount specified by count while shifting in the sign bit.

_mm_srai_pi32

__m64 _mm_srai_pi32(__m64 m, int count);

Shifts two 32-bit values in m right the amount specified by count while shifting in the sign bit. For the best performance, count should be a constant.

_mm_srl_pi16

__m64 _mm_srl_pi16(__m64 m, __m64 count);

Shifts four 16-bit values in m right the amount specified by count while shifting in zeros.

_mm_srli_pi16

__m64 _mm_srli_pi16(__m64 m, int count);

Shifts four 16-bit values in m right the amount specified by count while shifting in zeros. For the best performance, count should be a constant.

_mm_srl_pi32

__m64 _mm_srl_pi32(__m64 m, __m64 count);

Shifts two 32-bit values in m right the amount specified by count while shifting in zeros.

_mm_srli_pi32

__m64 _mm_srli_pi32(__m64 m, int count);

Shifts two 32-bit values in m right the amount specified by count while shifting in zeros. For the best performance, count should be a constant.

_mm_srl_pi64

__m64 _mm_srl_pi64(__m64 m, __m64 count);

Shifts the 64-bit value in m right the amount specified by count while shifting in zeros.

_mm_srli_pi64

__m64 _mm_srli_pi64(__m64 m, int count);

Shifts the 64-bit value in m right the amount specified by count while shifting in zeros. For the best performance, count should be a constant.