_mm_maskz_fmsubadd_pd
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VFMSUBADD132PD xmm {z}, xmm, xmm
Synopsis
 _mm_maskz_fmsubadd_pd(__mmask8 k, __m128d a, __m128d b, __m128d c);
Description
Multiply packed double-precision (64-bit) floating-point elements in "a" and "b", alternatively subtract and add packed elements in "c" from/to the intermediate result, and store the results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
Operation
FOR j := 0 to 1
	i := j*64
	IF k[j]
		IF ((j & 1) == 0) 
			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] * b[i+63:i]) - c[i+63:i]
		FI
	ELSE
		dst[i+63:i] := 0
	FI
ENDFOR
dst[MAX:128] := 0