_mm_maskz_fmadd_round_sch
Classification
AVX-512, Arithmetic, CPUID Test: AVX512_FP16
Header File
immintrin.h
Instruction
VFMADDCSH xmm {z}, xmm, xmm {er}
Synopsis
 _mm_maskz_fmadd_round_sch(__mmask8 k, __m128h a, __m128h b, __m128h c, const int rounding);
Description
Multiply the lower complex numbers in "a" and "b", accumulate to the lower complex number in "c", and store the result in the lower elements of "dst" using zeromask "k" (elements are zeroed out when mask bit 0 is not set), and copy the upper 6 packed elements from "a" to the upper elements of "dst". 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]". [round_note]
Operation
IF k[0]
	dst.fp16[0] := (a.fp16[0] * b.fp16[0]) - (a.fp16[1] * b.fp16[1]) + c.fp16[0]
	dst.fp16[1] := (a.fp16[1] * b.fp16[0]) + (a.fp16[0] * b.fp16[1]) + c.fp16[1]
ELSE
	dst.fp16[0] := 0
	dst.fp16[1] := 0
FI
dst[127:32] := a[127:32]
dst[MAX:128] := 0