_mm256_mask3_fnmsub_pd
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
Instruction
VFNMSUB132PD ymm {k}, ymm, ymm
Synopsis
_mm256_mask3_fnmsub_pd(__m256d a, __m256d b, __m256d c, __mmask8 k);
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 "c" 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] := c[i+63:i]
FI
ENDFOR
dst[MAX:256] := 0