_mm_fmaddsub_pd
Classification
AVX_ALL, Arithmetic, CPUID Test: FMA
Header File
immintrin.h
Instruction
VFMADDSUB132PD xmm, xmm, xmm
Synopsis
 _mm_fmaddsub_pd(__m128d a, __m128d b, __m128d c);
Description
Multiply packed double-precision (64-bit) floating-point elements in "a" and "b", alternatively add and subtract packed elements in "c" to/from the intermediate result, and store the results in "dst".
Operation
FOR j := 0 to 1
	i := j*64
	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
ENDFOR
dst[MAX:128] := 0