_mm512_maskz_fmsub_round_pd
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
Instruction
VFMSUB132PD zmm {z}, zmm, zmm {er}
Synopsis
_mm512_maskz_fmsub_round_pd(__mmask8 k, __m512d a, __m512d b, __m512d c, const int rounding);
Description
Multiply packed double-precision (64-bit) floating-point elements in "a" and "b", subtract packed elements in "c" from the intermediate result, and store the results in "dst" using zeromask "k" (elements are zeroed out 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] := 0
FI
ENDFOR
dst[MAX:512] := 0