_mm_mullo_epi16ADD 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 16-bit integers in a and b, producing intermediate 32-bit integers, and store the low 16 bits of the intermediate integers in output.
Result:
A 128-bit vector of 8 x 16-bit signed integers that hold the low half of the multiply operation.
Example:
#include <emmintrin.h>
#include <stdio.h>
int main() {
__m128i a = _mm_setr_epi16(1, 2, 3, 4, 5, 6, 7, 8);
__m128i b = _mm_setr_epi16(8, 7, 6, 5, 4, 3, 2, 1);
__m128i result = _mm_mullo_epi16(a, b);
short* res = (short*)&result;
for(int i = 0; i < 8; i++) {
printf("%d ", res[i]);
}
return 0;
}Prototypes
Assembly Instruction:
pmullw
Usage:
__m128i result =
_mm_mullo_epi16(
__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 |