mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-27 14:02:19 +00:00
64 lines
2.5 KiB
C#
64 lines
2.5 KiB
C#
using System;
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namespace Cosmos.IL2CPU.X86.IL
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{
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[Cosmos.IL2CPU.OpCode(ILOpCode.Code.Brfalse)]
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public class Brfalse: ILOp
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{
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public Brfalse(ILOpCode aOpCode):base(aOpCode)
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{
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}
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#region Old code
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// using System;
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// using System.IO;
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//
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// using CPU = Indy.IL2CPU.Assembler;
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// using CPUx86 = Indy.IL2CPU.Assembler.X86;
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//
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// namespace Indy.IL2CPU.IL.X86 {
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// [OpCode(OpCodeEnum.Brfalse)]
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// public class Brfalse: Op {
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// public readonly string TargetLabel;
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// public readonly string CurInstructionLabel;
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// public Brfalse(ILReader aReader, MethodInformation aMethodInfo)
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// : base(aReader, aMethodInfo) {
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// TargetLabel = GetInstructionLabel(aReader.OperandValueBranchPosition);
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// CurInstructionLabel = GetInstructionLabel(aReader);
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// }
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//
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// public override void DoAssemble() {
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// var xStackContent = Assembler.StackContents.Pop();
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// if (xStackContent.IsFloat) {
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// throw new Exception("Floats not yet supported!");
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// }
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// if (xStackContent.Size > 8) {
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// throw new Exception("StackSize>8 not supported");
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// }
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//
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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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//
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// if (xStackContent.Size > 4)
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// {
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// new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX };
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// new CPUx86.Pop { DestinationReg = CPUx86.Registers.EBX };
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// new CPUx86.Xor { DestinationReg = CPUx86.Registers.EAX, SourceReg = CPUx86.Registers.EAX };
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// new CPUx86.ConditionalJump { Condition = CPUx86.ConditionalTestEnum.NotZero, DestinationLabel = LabelFalse };
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// new CPUx86.Xor { DestinationReg = CPUx86.Registers.EBX, SourceReg = CPUx86.Registers.EBX };
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// new CPUx86.ConditionalJump { Condition = CPUx86.ConditionalTestEnum.NotZero, DestinationLabel = LabelFalse };
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// new CPUx86.Jump { DestinationLabel = TargetLabel };
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// new CPU.Label(LabelFalse);
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// } else
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// {
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// new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX };
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// new CPUx86.Compare { DestinationReg = CPUx86.Registers.EAX, SourceValue = 0 };
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// new CPUx86.ConditionalJump { Condition = CPUx86.ConditionalTestEnum.Equal, DestinationLabel = TargetLabel };
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// }
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// }
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// }
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// }
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#endregion Old code
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}
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}
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