_mm512_maskz_fnmsub_round_ph
Classification
AVX-512, Arithmetic, CPUID Test: AVX512_FP16
Header File
Instruction
VFNMSUB132PH zmm {z}, zmm, zmm {er}
Synopsis
_mm512_maskz_fnmsub_round_ph(__mmask32 k, __m512h a, __m512h b, __m512h c, const int rounding);
Description
Multiply packed half-precision (16-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 zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
[round_note]
Operation
FOR j := 0 to 31
IF k[j]
dst.fp16[j] := -(a.fp16[j] * b.fp16[j]) - c.fp16[j]
ELSE
dst.fp16[j] := 0
FI
ENDFOR
dst[MAX:512] := 0