using System;

using CPUx86 = Indy.IL2CPU.Assembler.X86;
using Indy.IL2CPU.Assembler;

namespace Indy.IL2CPU.IL.X86 {
	[OpCode(OpCodeEnum.Conv_U1)]
	public class Conv_U1: Op {
        private string mNextLabel;
	    private string mCurLabel;
	    private uint mCurOffset;
	    private MethodInformation mMethodInformation;
		public Conv_U1(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() {
			if (Assembler.StackContents.Peek().IsFloat) {
				EmitNotImplementedException(Assembler, GetServiceProvider(), "Conv_I1: Floats not yet implemented!", mCurLabel, mMethodInformation, mCurOffset, mNextLabel);
                return;
			}
			int xSource = Assembler.StackContents.Pop().Size;
			switch (xSource) {
				case 2:
				case 4: {
                        new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX };
                        new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX };
						break;
					}
				case 8: {
						new CPUx86.Pop{DestinationReg = CPUx86.Registers.EAX};
                        new CPUx86.Pop { DestinationReg = CPUx86.Registers.ECX };
						new CPUx86.Push{DestinationReg=CPUx86.Registers.EAX};
						break;
					}
				case 1: {
						new CPUx86.Noop();
						break;
					}
				default:
                    EmitNotImplementedException(Assembler, GetServiceProvider(), "Conv_I1: SourceSize " + xSource + " not supported", mCurLabel, mMethodInformation, mCurOffset, mNextLabel);
                    return;
			}
			Assembler.StackContents.Push(new StackContent(1, typeof(byte)));
		}
	}
}