using System;
using System.IO;


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

namespace Indy.IL2CPU.IL.X86 {
	[OpCode(OpCodeEnum.Ldelema)]
	public class Ldelema: Op {
		private uint mElementSize;
		public Ldelema(ILReader aReader, MethodInformation aMethodInfo)
			: base(aReader, aMethodInfo) {
			Type xTypeRef = aReader.OperandValueType;
			mElementSize = Engine.GetFieldStorageSize(xTypeRef);
		}

		public static void Assemble(CPU.Assembler aAssembler, uint aElementSize) {
			aAssembler.StackContents.Pop();
			aAssembler.StackContents.Pop();
			aAssembler.StackContents.Push(new StackContent(4, typeof(uint)));
            new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX };
            new CPUx86.Move { DestinationReg = CPUx86.Registers.EDX, SourceValue = aElementSize };
			new CPUx86.Multiply{DestinationReg=CPUx86.Registers.EDX};
            new CPUx86.Add { DestinationReg = CPUx86.Registers.EAX, SourceValue = (uint)(ObjectImpl.FieldDataOffset + 4) };
            new CPUx86.Pop { DestinationReg = CPUx86.Registers.EDX };
            new CPUx86.Add { DestinationReg = CPUx86.Registers.EDX, SourceReg = CPUx86.Registers.EAX };
            new CPUx86.Push { DestinationReg = CPUx86.Registers.EDX };
		}

		public override void DoAssemble() {
			Assemble(Assembler, mElementSize);
		}
	}
}