VectorMath.cs

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using System.Runtime.CompilerServices;
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.Arm;
using System.Runtime.Intrinsics.X86;
 
namespace System.Numerics;
 
internal static class VectorMath
{
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static Vector128<float> ConditionalSelectBitwise(Vector128<float> selector, Vector128<float> ifTrue, Vector128<float> ifFalse)
    {
        if (AdvSimd.IsSupported)
        {
        }
        if (Sse.IsSupported)
        {
            return Sse.Or(Sse.And(ifTrue, selector), Sse.AndNot(selector, ifFalse));
        }
        throw new PlatformNotSupportedException();
    }
 
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static Vector128<double> ConditionalSelectBitwise(Vector128<double> selector, Vector128<double> ifTrue, Vector128<double> ifFalse)
    {
        if (AdvSimd.IsSupported)
        {
        }
        if (Sse2.IsSupported)
        {
            return Sse2.Or(Sse2.And(ifTrue, selector), Sse2.AndNot(selector, ifFalse));
        }
        throw new PlatformNotSupportedException();
    }
 
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static bool Equal(Vector128<float> vector1, Vector128<float> vector2)
    {
        if (AdvSimd.Arm64.IsSupported)
        {
        }
        if (Sse.IsSupported)
        {
            return Sse.MoveMask(Sse.CompareNotEqual(vector1, vector2)) == 0;
        }
        throw new PlatformNotSupportedException();
    }
 
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static Vector128<float> Lerp(Vector128<float> a, Vector128<float> b, Vector128<float> t)
    {
        if (AdvSimd.IsSupported)
        {
        }
        if (Fma.IsSupported)
        {
            return Fma.MultiplyAdd(Sse.Subtract(b, a), t, a);
        }
        if (Sse.IsSupported)
        {
            return Sse.Add(Sse.Multiply(a, Sse.Subtract(Vector128.Create(1f), t)), Sse.Multiply(b, t));
        }
        throw new PlatformNotSupportedException();
    }
 
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static bool NotEqual(Vector128<float> vector1, Vector128<float> vector2)
    {
        if (AdvSimd.IsSupported)
        {
        }
        if (Sse.IsSupported)
        {
            return Sse.MoveMask(Sse.CompareNotEqual(vector1, vector2)) != 0;
        }
        throw new PlatformNotSupportedException();
    }
}