_mm_mullo_epi32ADD TO COMPARE ADDED TO COMPARE
Intel 64-bit (64 bits)/ SSE4.2
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View Félix Cloutier's documentation
Purpose:
Multiply the packed 32-bit integers in a and b, producing intermediate 64-bit integers, and store the low 32 bits of the intermediate integers in output.
Result:
A 128-bit vector of 4 x 32-bit signed integers that hold the low half of the multiply operation.
Example:
#include <smmintrin.h>
#include <stdio.h>
int main() {
__m128i a = _mm_setr_epi32(1, 2, 3, 4);
__m128i b = _mm_setr_epi32(4, 3, 2, 1);
__m128i result = _mm_mullo_epi32(a, b);
int* res = (int*)&result;
for(int i = 0; i < 4; i++) {
printf("%d ", res[i]);
}
return 0;
}Prototypes
Assembly Instruction:
pmulld
Usage:
_m128i result =
_mm_mullo_epi32(
_m128i a, _m128i b
)
Performance Metrics:
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SIMD Intrinsics Summary
| SIMD Engines: | 6 |
| C Intrinsics: | 10444 |
| NEON: | 4353 |
| AVX2: | 405 |
| AVX512: | 4717 |
| SSE4.2: | 598 |
| VSX: | 192 |
| IBM-Z: | 179 |