_mm512_rsqrt28_psADD TO COMPARE ADDED TO COMPARE
Intel 64-bit (64 bits)/ AVX512
View official documentation
View Félix Cloutier's documentation
Purpose:
Compute the approximate reciprocal square root of packed single-precision (32-bit) floating-point elements in "a", store the results in "dst". The maximum relative error for this approximation is less than 2^-28.
Result:
__m512
Example:
#include <immintrin.h>
#include <stdio.h>
int main() {
__m512 a = _mm512_setr_ps(1.0f, 4.0f, 9.0f, 16.0f, 25.0f, 36.0f, 49.0f, 64.0f, 81.0f, 100.0f, 121.0f, 144.0f, 169.0f, 196.0f, 225.0f, 256.0f);
__m512 result = _mm512_rsqrt28_ps(a);
float* res = (float*)&result;
for (int i = 0; i < 16; i++)
printf("%f\n", res[i]);
}Prototypes
Assembly Instruction:
VRSQRT28PS
Usage:
__m512 result =
_mm512_rsqrt28_ps(
__m512 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 |