_mm512_mask3_fnmadd_round_pd
Classification
KNC, Arithmetic, CPUID Test: KNCNI
Header File
Instruction
VFNMADD132PD zmm {k}, zmm, zmm {er}
Synopsis
_mm512_mask3_fnmadd_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", add the negated intermediate result to packed elements in "c", 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