_mm256_abs_epi8ADD TO COMPARE ADDED TO COMPARE
Intel 64-bit (64 bits)/ AVX2
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Purpose:
Compute the absolute value of packed signed 8-bit integers in a, and store the unsigned results in output.
Result:
A 256-bit vector of 32 x 8-bit signed integers that hold the absolute values of the input elements.
Example:
#include <immintrin.h>
#include <stdio.h>
int main() {
__m256i a = _mm256_set_epi8( -1, 2, -3, 4, -5, 6, -7, 8, -9, 10, -11, 12, -13, 14, -15, 16, -17, 18, -19, 20, -21, 22, -23, 24, -25, 26, -27, 28, -29, 30, -31, 32 );
__m256i d = _mm256_abs_epi8(a);
int8_t result_data[32];
_mm256_storeu_si256((__m256i*)result_data, d);
for (int i = 0; i < 32; i++) {
printf("%d ", result_data[i]);
}
printf("\n");
return 0;
}Prototypes
Assembly Instruction:
vpabsb
Usage:
__m256i result =
_mm256_abs_epi8(
__m256i a
)
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 |