mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-30 21:00:30 +00:00
65 lines
No EOL
2.2 KiB
C#
65 lines
No EOL
2.2 KiB
C#
using System;
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using Cosmos.IL2CPU.ILOpCodes;
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using CPUx86 = Cosmos.Compiler.Assembler.X86;
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using Cosmos.Compiler.Assembler;
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namespace Cosmos.IL2CPU.X86.IL
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{
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[Cosmos.IL2CPU.OpCode(ILOpCode.Code.Ldloc)]
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public class Ldloc : ILOp
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{
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public Ldloc(Cosmos.Compiler.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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var xOpVar = (OpVar)aOpCode;
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var xVar = aMethod.MethodBase.GetMethodBody().LocalVariables[xOpVar.Value];
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var xStackCount = GetStackCountForLocal(aMethod, xVar);
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var xEBPOffset = ((int)GetEBPOffsetForLocal(aMethod, xOpVar.Value));
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var xSize = SizeOfType(xVar.LocalType);
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new Comment("EBPOffset = " + xEBPOffset);
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if (xStackCount > 1)
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{
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for (int i = 0; i < xStackCount; i++)
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{
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new CPUx86.Move { DestinationReg = CPUx86.Registers.EAX, SourceReg = CPUx86.Registers.EBP, SourceIsIndirect = true, SourceDisplacement = (int)(0 - (xEBPOffset + (i * 4))) };
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new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX };
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}
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}
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else
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{
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switch (xSize)
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{
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case 1:
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{
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new CPUx86.Xor { DestinationReg = CPUx86.Registers.EAX, SourceReg = CPUx86.Registers.EAX };
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new CPUx86.Move { DestinationReg = CPUx86.Registers.AL, SourceReg = CPUx86.Registers.EBP, SourceIsIndirect = true, SourceDisplacement = 0 - xEBPOffset };
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new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX };
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break;
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}
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case 2:
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{
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new CPUx86.Xor { DestinationReg = CPUx86.Registers.EAX, SourceReg = CPUx86.Registers.EAX };
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new CPUx86.Move { DestinationReg = CPUx86.Registers.AX, SourceReg = CPUx86.Registers.EBP, SourceIsIndirect = true, SourceDisplacement = 0 - xEBPOffset };
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new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX };
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break;
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}
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case 4:
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{
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new CPUx86.Push { DestinationReg = CPUx86.Registers.EBP, DestinationIsIndirect = true, DestinationDisplacement = 0 - xEBPOffset };
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break;
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}
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}
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}
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#if DOTNETCOMPATIBLE
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Assembler.Stack.Push(ILOp.Align(xSize, 4), xVar.LocalType);
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#else
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Assembler.Stack.Push(xSize, xVar.LocalType);
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#endif
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}
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}
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} |