_mm512_maskz_fnmadd_round_pd
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
Instruction
VFNMADD132PD zmm {z}, zmm, zmm {er}
Synopsis
_mm512_maskz_fnmadd_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", add the negated intermediate result to packed elements in "c", 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