using System;

using System.Runtime.Intrinsics;

​

(ushort A, ushort R, ushort G, ushort B) c = (0x8000, 0xFFFF, 0xFFFF, 0xFFFF);

​

Vector128<uint> v = Vector128.Create(c.R, c.G, c.B, 0u);

v = v * c.A / Vector128.Create(0xFFFFu);

var cPre = (c.A, (ushort)v[0], (ushort)v[1], (ushort)v[2]);

​

Console.WriteLine(c);

Console.WriteLine(cPre);