_mm512_rsqrt14_pd
Classification
AVX-512, Elementary Math Functions, CPUID Test: AVX512F
Header File
Instruction
VRSQRT14PD zmm, zmm
Synopsis
_mm512_rsqrt14_pd(__m512d a);
Description
Compute the approximate reciprocal square root of packed double-precision (64-bit) floating-point elements in "a", and store the results in "dst". The maximum relative error for this approximation is less than 2^-14.
Operation
FOR j := 0 to 7
i := j*64
dst[i+63:i] := (1.0 / SQRT(a[i+63:i]))
ENDFOR
dst[MAX:512] := 0