Packed Format Conversion Intrinsics

These Intel® Streaming SIMD Extensions 4 (Intel® SSE4) intrinsics convert a packed integer to a zero-extended or sign-extended integer with wider type. The prototypes for these intrinsics are in the smmintrin.h file.

To use these intrinsics, include the immintrin.h file as follows:

#include <immintrin.h>

Intrinsic Syntax

Operation

Corresponding
Intel® SSE4 Instruction

__m128i _mm_cvtepi8_epi32(__m128i a)

Sign extend four bytes into four doublewords

PMOVSXBD

__m128i _mm_cvtepi8_epi64 (__m128i a)

Sign extend two bytes into two quadwords

PMOVSXBQ

__m128i _mm_cvtepi8_epi16(__m128i a)

Sign extend eight bytes into eight words

PMOVSXBW

__m128i _mm_cvtepi32_epi64(__m128i a)

Sign extend two doublewords into two quadwords

PMOVSXDQ

__m128i _mm_cvtepi16_epi32(__m128i a)

Sign extend four words into four doublewords

PMOVSXWD

__m128i _mm_cvtepi16_epi64(__m128i a)

Sign extend two words into two quadwords

PMOVSXWQ

__m128i _mm_cvtepu8_epi32(__m128i a)

Zero extend four bytes into four doublewords

PMOVZXBD

__m128i _mm_cvtepu8_epi64(__m128i a)

Zero extend two bytes into two quadwords

PMOVZXBQ

__m128i _mm_cvtepu8_epi16(__m128i a)

Zero extend eight bytes into eight words

PMOVZXBW

__m128i _mm_cvtepu32_epi64(__m128i a)

Zero extend two doublewords into two quadwords

PMOVZXDQ

__m128i _mm_cvtepu16_epi32(__m128i a)

Zero extend four words into four doublewords

PMOVZXWD

__m128i _mm_cvtepu16_epi64(__m128i a)

Zero extend two words into two quadwords

PMOVZXWQ

Para obtener información más completa sobre las optimizaciones del compilador, consulte nuestro Aviso de optimización.