mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-27 22:12:25 +00:00
124 lines
4.9 KiB
C#
124 lines
4.9 KiB
C#
using System;
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using XSharp.Common;
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using CPUx86 = Cosmos.Assembler.x86;
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namespace Cosmos.IL2CPU.X86.IL
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{
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[Cosmos.IL2CPU.OpCode( ILOpCode.Code.Conv_Ovf_I )]
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public class Conv_Ovf_I : ILOp
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{
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public Conv_Ovf_I( Cosmos.Assembler.Assembler aAsmblr )
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: base( aAsmblr )
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{
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}
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public override void Execute(_MethodInfo aMethod, ILOpCode aOpCode)
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{
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//TODO: What if the last ILOp in a method was Conv_Ovf_I ?
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var xSource = aOpCode.StackPopTypes[0];
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var xSourceSize = SizeOfType(xSource);
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var xSourceIsFloat = TypeIsFloat(xSource);
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switch (xSourceSize)
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{
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case 8:
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XS.Pop(XSRegisters.EAX);
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XS.Add(XSRegisters.ESP, 4);
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XS.Push(XSRegisters.EAX);
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break;
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default:
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throw new NotImplementedException();
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}
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}
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//public override void Execute(_MethodInfo aMethod, ILOpCode aOpCode, ILOpCode aNextOpCode )
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//{
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// var xSource = Assembler.Stack.Pop();
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// switch( xSource.Size )
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// {
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// case 1:
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// case 2:
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// case 4:
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// {
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// XS.Noop();
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// break;
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// }
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// case 8:
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// {
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// XS.Pop(XSRegisters.EAX);
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// XS.SignExtendAX(XSRegisters.RegisterSize.Int32);
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// //all bits of EDX == sign (EAX)
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// XS.Pop(XSRegisters.EBX);
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// //must be equal to EDX
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// XS.Xor(XSRegisters.EBX, XSRegisters.CPUx86.Registers.EDX);
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// new CPUx86.ConditionalJump { Condition = CPUx86.ConditionalTestEnum.Zero, DestinationLabel = AssemblerNasm.TmpPosLabel( aMethod, aNextOpCode ) };
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// //equals
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// new CPUx86.Interrupt { DestinationValue = 4 };
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// break;
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// }
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// default:
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// //EmitNotImplementedException( Assembler, GetServiceProvider(), "Conv_Ovf_I: SourceSize " + xSource + " not supported!", mCurLabel, mMethodInformation, mCurOffset, mNextLabel );
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// throw new NotImplementedException();
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// }
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// Assembler.Stack.Push( new StackContent( 4, true, false, false ) );
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//}
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// using System;
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// using System.IO;
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// using CPU = Cosmos.Assembler.x86;
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// using Cosmos.IL2CPU.X86;
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// using CPUx86 = Cosmos.Assembler.x86;
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//
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// namespace Cosmos.IL2CPU.IL.X86 {
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// [Cosmos.Assembler.OpCode(OpCodeEnum.Conv_Ovf_I)]
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// public class Conv_Ovf_I: Op {
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// private readonly string NextInstructionLabel;
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// private string mNextLabel;
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// private string mCurLabel;
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// private uint mCurOffset;
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// private MethodInformation mMethodInformation;
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// public Conv_Ovf_I(ILReader aReader, MethodInformation aMethodInfo)
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// : base(aReader, aMethodInfo) {
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// NextInstructionLabel = GetInstructionLabel(aReader.NextPosition);
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// mMethodInformation = aMethodInfo;
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// mCurOffset = aReader.Position;
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// mCurLabel = IL.Op.GetInstructionLabel(aReader);
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// mNextLabel = IL.Op.GetInstructionLabel(aReader.NextPosition);
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// }
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// public override void DoAssemble() {
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// var xSource = Assembler.Stack.Pop();
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// switch (xSource.Size)
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// {
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// case 1:
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// case 2:
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// case 4:
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// {
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// XS.Noop();
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// break;
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// }
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// case 8:
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// {
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// XS.Pop(XSRegisters.EAX);
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// XS.SignExtendAX(XSRegisters.RegisterSize.Int32);
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// //all bits of EDX == sign (EAX)
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// XS.Pop(XSRegisters.EBX);
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// //must be equal to EDX
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// XS.Xor(XSRegisters.EBX, XSRegisters.CPUx86.Registers.EDX);
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// XS.Jump(ConditionalTestEnum.Zero, NextInstructionLabel);
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// //equals
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// new CPUx86.Interrupt{DestinationValue=4};
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// break;
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//
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// }
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// default:
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// EmitNotImplementedException(Assembler, GetServiceProvider(), "Conv_Ovf_I: SourceSize " + xSource + " not supported!", mCurLabel, mMethodInformation, mCurOffset, mNextLabel);
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// break;
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// }
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// Assembler.Stack.Push(new StackContent(4, true, false, false));
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// }
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// }
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// }
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}
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}
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