Integer Shift Operations for Streaming SIMD Extensions 2

The shift-operation intrinsics for Streaming SIMD Extensions 2 (SSE2) and the description for each are listed in the following table.

For detailed information about an intrinsic, click on that intrinsic name in the following table.

The results of each intrinsic operation are placed in a register. This register is illustrated for each intrinsic with R and R0-R7. R and R0 R7 each represent one of the pieces of the result register.

The prototypes for SSE2 intrinsics are in the emmintrin.h header file.

  Note

The count argument is one shift count that applies to all elements of the operand being shifted. It is not a vector shift count that shifts each element by a different amount.

__m128i _mm_slli_si128(__m128i a, int imm)

Shifts the 128-bit value in a left by imm bytes while shifting in zeros. imm must be an immediate.

__m128i _mm_slli_epi16(__m128i a, int count)

Shifts the 8 signed or unsigned 16-bit integers in a left by count bits while shifting in zeros.

__m128i _mm_sll_epi16(__m128i a, __m128i count)

Shifts the 8 signed or unsigned 16-bit integers in a left by count bits while shifting in zeros.

__m128i _mm_slli_epi32(__m128i a, int count)

Shifts the 4 signed or unsigned 32-bit integers in a left by count bits while shifting in zeros.

__m128i _mm_sll_epi32(__m128i a, __m128i count)

Shifts the 4 signed or unsigned 32-bit integers in a left by count bits while shifting in zeros.

__m128i _mm_slli_epi64(__m128i a, int count)

Shifts the 2 signed or unsigned 64-bit integers in a left by count bits while shifting in zeros.

__m128i _mm_sll_epi64(__m128i a, __m128i count)

Shifts the 2 signed or unsigned 64-bit integers in a left by count bits while shifting in zeros.

__m128i _mm_srai_epi16(__m128i a, int count)

Shifts the 8 signed 16-bit integers in a right by count bits while shifting in the sign bit.

__m128i _mm_sra_epi16(__m128i a, __m128i count)

Shifts the 8 signed 16-bit integers in a right by count bits while shifting in the sign bit.

__m128i _mm_srai_epi32(__m128i a, int count)

Shifts the 4 signed 32-bit integers in a right by count bits while shifting in the sign bit.

__m128i _mm_sra_epi32(__m128i a, __m128i count)

Shifts the 4 signed 32-bit integers in a right by count bits while shifting in the sign bit.

__m128i _mm_srli_si128(__m128i a, int imm)

Shifts the 128-bit value in a right by imm bytes while shifting in zeros. imm must be an immediate.

__m128i _mm_srli_epi16(__m128i a, int count)

Shifts the 8 signed or unsigned 16-bit integers in a right by count bits while shifting in zeros.

__m128i _mm_srl_epi16(__m128i a, __m128i count)

Shifts the 8 signed or unsigned 16-bit integers in a right by count bits while shifting in zeros.

__m128i _mm_srli_epi32(__m128i a, int count)

Shifts the 4 signed or unsigned 32-bit integers in a right by count bits while shifting in zeros.

__m128i _mm_srl_epi32(__m128i a, __m128i count)

Shifts the 4 signed or unsigned 32-bit integers in a right by count bits while shifting in zeros.

__m128i _mm_srli_epi64(__m128i a, int count)

Shifts the 2 signed or unsigned 64-bit integers in a right by count bits while shifting in zeros.

__m128i _mm_srl_epi64(__m128i a, __m128i count)

Shifts the 2 signed or unsigned 64-bit integers in a right by count bits while shifting in zeros.