using System;
using CPUx86 = Cosmos.IL2CPU.X86;

namespace Cosmos.IL2CPU.X86.IL
{
	[Cosmos.IL2CPU.OpCode(ILOpCode.Code.Conv_R8)]
	public class Conv_R8: ILOp
	{
		public Conv_R8(Cosmos.IL2CPU.Assembler aAsmblr):base(aAsmblr)
		{
		}

    public override void Execute(MethodInfo aMethod, ILOpCode aOpCode) {
        var xSource = Assembler.Stack.Peek();
        if (!xSource.IsFloat)
        {
            new CPUx86.Move { SourceReg = CPUx86.Registers.ESP, DestinationReg = CPUx86.Registers.EAX, SourceIsIndirect = true };
            new CPUx86.SSE.ConvertSI2SS { SourceReg = CPUx86.Registers.EAX, DestinationReg = CPUx86.Registers.XMM0 };
            new CPUx86.SSE.MoveSS { SourceReg = CPUx86.Registers.XMM0, DestinationReg = CPUx86.Registers.ESP, DestinationIsIndirect = true };
        }
        Assembler.Stack.Pop();
        switch (xSource.Size)
        {
            case 1:
            case 2:
            case 4:
                {

                    new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX };
                    new CPUx86.Push { DestinationValue = 0 };
                    new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX };
                    break;
                }
            case 8:
                {
                    break;
                }
            default:
                //EmitNotImplementedException( Assembler, GetServiceProvider(), "Conv_U8: SourceSize " + xSource + " not supported!", mCurLabel, mMethodInformation, mCurOffset, mNextLabel );
                throw new NotImplementedException();
        } Assembler.Stack.Push(8, true, true, true);

    }

    
		// using System;
		// using System.IO;
		// 
		// 
		// using CPUx86 = Cosmos.IL2CPU.X86;
		// using Cosmos.IL2CPU.X86;
		// 
		// namespace Cosmos.IL2CPU.IL.X86 {
		// 	[OpCode(OpCodeEnum.Conv_R8)]
		// 	public class Conv_R8: Op {
		//         private string mNextLabel;
		// 	    private string mCurLabel;
		// 	    private uint mCurOffset;
		// 	    private MethodInformation mMethodInformation;
		// 		public Conv_R8(ILReader aReader, MethodInformation aMethodInfo)
		// 			: base(aReader, aMethodInfo) {
		//              mMethodInformation = aMethodInfo;
		// 		    mCurOffset = aReader.Position;
		// 		    mCurLabel = IL.Op.GetInstructionLabel(aReader);
		//             mNextLabel = IL.Op.GetInstructionLabel(aReader.NextPosition);
		// 		}
		// 		public override void DoAssemble() {
		// 			var xStackItem = Assembler.Stack.Peek();
		// 			switch (xStackItem.Size) {
		// 				case 1:
		// 				case 2:
		// 				case 4: {
		//                         new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX };
		//                         new CPUx86.Push { DestinationValue = 0 };
		//                         new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX };
		// 						Assembler.Stack.Pop();
		// 						Assembler.Stack.Push(new StackContent(8, typeof(Double)));
		// 
		// 						break;
		// 					}
		// 				case 8: {
		// 						new CPUx86.Noop();
		// 						break;
		// 					}
		// 				default:
		//                     EmitNotImplementedException(Assembler, GetServiceProvider(), "Conv_R8: SourceSize " + xStackItem.Size + " not supported!", mCurLabel, mMethodInformation, mCurOffset, mNextLabel);
		// 					throw new Exception("SourceSize " + xStackItem.Size + " not supported!");
		// 			}
		// 		}
		// 	}
		// }
		
	}
}