_mm_maskz_fmsubadd_ps
Classification
AVX-512, Arithmetic, CPUID Test: AVX512F
Header File
Instruction
VFMSUBADD132PS xmm {z}, xmm, xmm
Synopsis
_mm_maskz_fmsubadd_ps(__mmask8 k, __m128 a, __m128 b, __m128 c);
Description
Multiply packed single-precision (32-bit) floating-point elements in "a" and "b", alternatively subtract and add packed elements in "c" from/to the intermediate result, and store the results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
Operation
FOR j := 0 to 3
i := j*32
IF k[j]
IF ((j & 1) == 0)
dst[i+31:i] := (a[i+31:i] * b[i+31:i]) + c[i+31:i]
ELSE
dst[i+31:i] := (a[i+31:i] * b[i+31:i]) - c[i+31:i]
FI
ELSE
dst[i+31:i] := 0
FI
ENDFOR
dst[MAX:128] := 0