Developer Guide and Reference

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DWORD Multiply Intrinsics

These Intel® Streaming SIMD Extensions (Intel® SSE4) DWORD multiply intrinsics are designed to aid vectorization. They enable four simultaneous 32-bit by 32-bit multiplies. 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_mul_epi32( __m128i a, __m128i b)
Packed integer 32-bit multiplication of two low pairs of operands producing two 64-bit results
PMULDQ
__m128i _mm_mullo_epi32( __m128i a, __m128i b)
Packed integer 32-bit multiplication with truncation of upper halves of results
PMULLD