_mm512_mask_rcp14_pd
Classification
AVX-512, Elementary Math Functions, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VRCP14PD zmm {k}, zmm
Synopsis
 _mm512_mask_rcp14_pd(__m512d src, __mmask8 k, __m512d a);
Description
Compute the approximate reciprocal of packed double-precision (64-bit) floating-point elements in "a", and store the results in "dst" using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set). The maximum relative error for this approximation is less than 2^-14.
Operation
FOR j := 0 to 7
	i := j*64
	IF k[j]
		dst[i+63:i] := (1.0 / a[i+63:i])
	ELSE
		dst[i+63:i] := src[i+63:i]
	FI
ENDFOR
dst[MAX:512] := 0