_mm_fmadd_sch
Classification
AVX-512, Arithmetic, CPUID Test: AVX512_FP16
Header File
immintrin.h
Instruction
VFMADDCSH xmm, xmm, xmm
Synopsis
 _mm_fmadd_sch(__m128h a, __m128h b, __m128h c);
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", 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]".
Operation
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]
dst[127:32] := a[127:32]
dst[MAX:128] := 0