mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-20 21:08:51 +00:00
54 lines
No EOL
1.7 KiB
C#
54 lines
No EOL
1.7 KiB
C#
using System;
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using System.IO;
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using CPUx86 = Indy.IL2CPU.Assembler.X86;
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using CPU = Indy.IL2CPU.Assembler;
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using Indy.IL2CPU.Assembler;
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namespace Indy.IL2CPU.IL.X86 {
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[OpCode(OpCodeEnum.Cgt)]
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public class Cgt: Op {
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private readonly string NextInstructionLabel;
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private readonly string CurInstructionLabel;
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public Cgt(ILReader aReader, MethodInformation aMethodInfo)
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: base(aReader, aMethodInfo) {
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NextInstructionLabel = GetInstructionLabel(aReader.NextPosition);
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CurInstructionLabel = GetInstructionLabel(aReader);
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}
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public override void DoAssemble() {
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var xStackItem= Assembler.StackContents.Pop();
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if (xStackItem.IsFloat) {
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throw new Exception("Floats not yet supported!");
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}
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if (xStackItem.Size > 8) {
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throw new Exception("StackSizes>8 not supported");
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}
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Assembler.StackContents.Push(new StackContent(4, typeof(bool)));
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string BaseLabel = CurInstructionLabel + "__";
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string LabelTrue = BaseLabel + "True";
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string LabelFalse = BaseLabel + "False";
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new CPUx86.Pop(CPUx86.Registers.EAX);
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if (xStackItem.Size > 4) {
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new CPUx86.Add("esp", "4");
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}
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new CPUx86.Compare(CPUx86.Registers.EAX, CPUx86.Registers.AtESP);
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new CPUx86.JumpIfGreater(LabelTrue);
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new CPUx86.JumpAlways(LabelFalse);
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new CPU.Label(LabelTrue);
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new CPUx86.Add(CPUx86.Registers.ESP, "4");
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if (xStackItem.Size > 4) {
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new CPUx86.Add("esp", "4");
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}
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new CPUx86.Push("01h");
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new CPUx86.JumpAlways(NextInstructionLabel);
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new CPU.Label(LabelFalse);
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new CPUx86.Add(CPUx86.Registers.ESP, "4");
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if (xStackItem.Size > 4) {
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new CPUx86.Add("esp", "4");
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}
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new CPUx86.Push("00h");
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new CPUx86.JumpAlways(NextInstructionLabel);
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}
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}
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} |