_mm512_fmul_pch
Classification
AVX-512, Arithmetic, CPUID Test: AVX512_FP16
Header File
Instruction
VFMULCPH zmm, zmm, zmm
Synopsis
_mm512_fmul_pch(__m512h a, __m512h b);
Description
Multiply packed complex numbers in "a" and "b", and store the results in "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
FOR i := 0 to 15
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])
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])
ENDFOR
dst[MAX:512] := 0