_mm_maskz_rcp14_pd
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VRCP14PD xmm {z}, xmm
Synopsis
 _mm_maskz_rcp14_pd(__mmask8 k, __m128d a);
Description
Compute the approximate reciprocal of packed double-precision (64-bit) floating-point elements in "a", and store the results in "dst" using zeromask "k" (elements are zeroed out 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 1
	i := j*64
	IF k[j]
		dst[i+63:i] := (1.0 / a[i+63:i])
	ELSE
		dst[i+63:i] := 0
	FI
ENDFOR
dst[MAX:128] := 0