_mm_maskz_fmadd_pch
Classification
AVX-512, Arithmetic, CPUID Test: AVX512_FP16
Header File
Instruction
VFMADDCPH xmm {z}, xmm, xmm
Synopsis
_mm_maskz_fmadd_pch(__mmask8 k, __m128h a, __m128h b, __m128h c);
Description
Multiply packed complex numbers in "a" and "b", accumulate to the corresponding complex numbers in "c", and store the results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set). Each complex number is composed of two adjacent half-precision (16-bit) floating-point elements, which defines the complex number "complex = vec.fp16[0] + i * vec.fp16[1]".
Operation
FOR i := 0 to 3
IF k[i]
dst.fp16[2*i+0] := (a.fp16[2*i+0] * b.fp16[2*i+0]) - (a.fp16[2*i+1] * b.fp16[2*i+1]) + c.fp16[2*i+0]
dst.fp16[2*i+1] := (a.fp16[2*i+1] * b.fp16[2*i+0]) + (a.fp16[2*i+0] * b.fp16[2*i+1]) + c.fp16[2*i+1]
ELSE
dst.fp16[2*i+0] := 0
dst.fp16[2*i+1] := 0
FI
ENDFOR
dst[MAX:128] := 0