//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
//     file="M128.cs"
//     Project: StgSharp
//     AuthorGroup: Nitload Space
//     Copyright (c) Nitload Space. All rights reserved.
//     
//     Permission is hereby granted, free of charge, to any person 
//     obtaining a copy of this software and associated documentation 
//     files (the ¡°Software¡±), to deal in the Software without restriction, 
//     including without limitation the rights to use, copy, modify, merge,
//     publish, distribute, sublicense, and/or sell copies of the Software, 
//     and to permit persons to whom the Software is furnished to do so, 
//     subject to the following conditions:
//     
//     The above copyright notice and 
//     this permission notice shall be included in all copies 
//     or substantial portions of the Software.
//     
//     THE SOFTWARE IS PROVIDED ¡°AS IS¡±, 
//     WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
//     INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
//     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
//     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
//     DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
//     ARISING FROM, OUT OF OR IN CONNECTION WITH 
//     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//     
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Numerics;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
#if NET5_0_OR_GREATER
using System.Runtime.Intrinsics;
using System.Runtime.Intrinsics.X86;
#endif

using System.Text;

namespace StgSharp.Intrinsic
{
    [StructLayout(LayoutKind.Explicit, Pack = 16)]
    public unsafe struct M128 : IRegisterType
    {
        [FieldOffset(0)] internal Vector4 Vec;
        [FieldOffset(0)] internal fixed byte Buffer[16];

        public override bool Equals([NotNullWhen(true)] object obj)
        {
            if (obj is not M128 other)
            {
                return false;
            }
            return this == other;
        }

        internal M128(Vector4 v)
        {
            Vec = v;
        }

        public override int GetHashCode()
        {
            return Vec.GetHashCode();
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public T Read<T>(int index)
            where T : struct, INumber<T>

        {
            fixed (Vector4* p = &Vec)
            {
#pragma warning disable CS8500
                return *((T*)p + index);
#pragma warning restore CS8500
            }
        }

        public ref T AsRef<T>() where T : struct, INumber<T>
        {
            return ref Unsafe.As<byte, T>(ref Buffer[0]);
        }

        public override string ToString()
        {
            return string.Empty;
        }

        public string ToString(int sample)
        {
            string str = string.Empty;
            for (int i = 15; i >= 0; i--)
            {
                str += $"{Convert.ToString(Buffer[i], sample)} ";
            }
            return str;
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public void Write<T>(int index, T value)
            where T : struct, INumber<T>
        {
            fixed (byte* p = Buffer)
            {
#pragma warning disable CS8500
                *((T*)p + index) = value;
#pragma warning restore CS8500
            }
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static bool operator !=(M128 left, M128 right)
        {
            return left.Vec != right.Vec;
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public static bool operator ==(M128 left, M128 right)
        {
            return left.Vec == right.Vec;
        }

        [MethodImpl( MethodImplOptions.AggressiveInlining )]
        public static explicit operator Vector128<byte>( M128 m )
        {
            return m.Vec.AsVector128().As<float, byte>();
        }

        [MethodImpl( MethodImplOptions.AggressiveInlining )]
        public static explicit operator Vector128<sbyte>( M128 m )
        {
            return m.Vec.AsVector128().As<float, sbyte>();
        }

        [MethodImpl( MethodImplOptions.AggressiveInlining )]
        public static explicit operator Vector128<short>( M128 m )
        {
            return m.Vec.AsVector128().As<float, short>();
        }

        [MethodImpl( MethodImplOptions.AggressiveInlining )]
        public static explicit operator Vector128<ushort>( M128 m )
        {
            return m.Vec.AsVector128().As<float, ushort>();
        }

        [MethodImpl( MethodImplOptions.AggressiveInlining )]
        public static explicit operator Vector128<int>( M128 m )
        {
            return m.Vec.AsVector128().As<float, int>();
        }

        [MethodImpl( MethodImplOptions.AggressiveInlining )]
        public static explicit operator Vector128<uint>( M128 m )
        {
            return m.Vec.AsVector128().As<float, uint>();
        }

        [MethodImpl( MethodImplOptions.AggressiveInlining )]
        public static explicit operator Vector128<long>( M128 m )
        {
            return m.Vec.AsVector128().As<float, long>();
        }

        [MethodImpl( MethodImplOptions.AggressiveInlining )]
        public static explicit operator Vector128<ulong>( M128 m )
        {
            return m.Vec.AsVector128().As<float, ulong>();
        }

        [MethodImpl( MethodImplOptions.AggressiveInlining )]
        public static explicit operator Vector128<float>( M128 m )
        {
            return m.Vec.AsVector128().As<float, float>();
        }

        [MethodImpl( MethodImplOptions.AggressiveInlining )]
        public static explicit operator Vector128<double>( M128 m )
        {
            return m.Vec.AsVector128().As<float, double>();
        }


    }
}