_mm_maskz_fmadd_sd
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
Instruction
VFMADD132SD xmm {z}, xmm, xmm
Synopsis
_mm_maskz_fmadd_sd(__mmask8 k, __m128d a, __m128d b, __m128d c);
Description
Multiply the lower double-precision (64-bit) floating-point elements in "a" and "b", and add the intermediate result to the lower element in "c". Store the result in the lower element of "dst" using zeromask "k" (the element is zeroed out when mask bit 0 is not set), and copy the upper element from "a" to the upper element of "dst".
Operation
IF k[0]
dst[63:0] := (a[63:0] * b[63:0]) + c[63:0]
ELSE
dst[63:0] := 0
FI
dst[127:64] := a[127:64]
dst[MAX:128] := 0