_mm256_mask_fnmsub_pd
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VFNMSUB132PD ymm {k}, ymm, ymm
Synopsis
 _mm256_mask_fnmsub_pd(__m256d a, __mmask8 k, __m256d b, __m256d c);
Description
Multiply packed double-precision (64-bit) floating-point elements in "a" and "b", subtract packed elements in "c" from the negated intermediate result, and store the results in "dst" using writemask "k" (elements are copied from "a" when the corresponding mask bit is not set).
Operation
FOR j := 0 to 3
	i := j*64
	IF k[j]
		dst[i+63:i] := -(a[i+63:i] * b[i+63:i]) - c[i+63:i]
	ELSE
		dst[i+63:i] := a[i+63:i]
	FI
ENDFOR	
dst[MAX:256] := 0