X86Base.cs

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using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
 
namespace System.Runtime.Intrinsics.X86;
 
[Intrinsic]
public abstract class X86Base
{
    [Intrinsic]
    public abstract class X64
    {
        public static bool IsSupported => IsSupported;
 
        internal static ulong BitScanForward(ulong value)
        {
            return BitScanForward(value);
        }
 
        internal static ulong BitScanReverse(ulong value)
        {
            return BitScanReverse(value);
        }
    }
 
    public static bool IsSupported => IsSupported;
 
    [DllImport("QCall")]
    private unsafe static extern void __cpuidex(int* cpuInfo, int functionId, int subFunctionId);
 
    internal static uint BitScanForward(uint value)
    {
        return BitScanForward(value);
    }
 
    internal static uint BitScanReverse(uint value)
    {
        return BitScanReverse(value);
    }
 
    public unsafe static (int Eax, int Ebx, int Ecx, int Edx) CpuId(int functionId, int subFunctionId)
    {
        int* ptr = stackalloc int[4];
        __cpuidex(ptr, functionId, subFunctionId);
        return (Eax: *ptr, Ebx: ptr[1], Ecx: ptr[2], Edx: ptr[3]);
    }
}