Developer Guide and Reference

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Packed DWORD to Unsigned WORD Intrinsic

The prototype for this Intel® Streaming SIMD Extensions (Intel® SSE4) intrinsic is in the
smmintrin.h
file.
To use this intrinsic, include the
immintrin.h
file as follows:
#include <immintrin.h>

_mm_packus_epi32

__m128i _mm_packus_epi32(__m128i m1, __m128i m2);
Converts eight packed signed doublewords into eight packed unsigned words, using unsigned saturation to handle overflow condition.
Corresponding instruction:
PACKUSDW

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804