_mm512_mask3_fnmsub_round_pd
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
Instruction
VFNMSUB132PD zmm {k}, zmm, zmm {er}
Synopsis
_mm512_mask3_fnmsub_round_pd(__m512d a, __m512d b, __m512d c, __mmask8 k, int rounding);
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). [round_note]
Operation
FOR j := 0 to 7
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:512] := 0