using System;
using CPUx86 = Cosmos.Compiler.Assembler.X86;
namespace Cosmos.IL2CPU.X86.IL
{
    [Cosmos.IL2CPU.OpCode( ILOpCode.Code.Conv_U )]
    public class Conv_U : ILOp
    {
        public Conv_U( Cosmos.Compiler.Assembler.Assembler aAsmblr )
            : base( aAsmblr )
        {
        }

        public override void Execute( MethodInfo aMethod, ILOpCode aOpCode )
        {
            var xSource = Assembler.Stack.Peek();
			if (xSource.IsFloat)
			{
				new CPUx86.SSE.MoveSS { SourceReg = CPUx86.Registers.ESP, DestinationReg = CPUx86.Registers.XMM0, SourceIsIndirect = true };
				new CPUx86.SSE.ConvertSS2SI { SourceReg = CPUx86.Registers.XMM0, DestinationReg = CPUx86.Registers.EAX };
				new CPUx86.Move { DestinationReg = CPUx86.Registers.ESP, SourceReg = CPUx86.Registers.EAX, DestinationIsIndirect = true };
			}
			else
			{
				Assembler.Stack.Pop();
				switch (xSource.Size)
				{
					case 1:
					case 2:
						throw new Exception("The size {0:D} could not exist, because always is pushed Int32 or Int64!");
					case 8:
						{
							new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX };
							new CPUx86.Pop { DestinationReg = CPUx86.Registers.EDX };
							new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX };
							break;
						}
					case 4:
						{
							break;
						}
					default:
						//EmitNotImplementedException(Assembler, GetServiceProvider(), "Conv_U: SourceSize " + xStackContent.Size + "not supported yet!", mCurLabel, mMethodInformation, mCurOffset, mNextLabel);
						throw new NotImplementedException();
				}
				Assembler.Stack.Push(4, typeof(UInt32));
			}
        }
    }
}