mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-30 21:00:30 +00:00
7f84d28d69
change StackContents to uint, able to use now mnemoric with 3 operands, shl IL near 64 bit (unknown error), add asm line to nasm error
65 lines
No EOL
2.6 KiB
C#
65 lines
No EOL
2.6 KiB
C#
using System;
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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.Shl )]
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public class Shl : ILOp
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{
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public Shl( 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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string BaseLabel = GetLabel(aMethod, aOpCode) + "__";
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string ResultIsZero = BaseLabel + "ResultIsZero";
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string End_Shl = BaseLabel + "End_Shl";
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new CPUx86.Pop { DestinationReg = CPUx86.Registers.ECX }; // shift amount
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var xStackItem_ShiftAmount = Assembler.Stack.Pop();
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var xStackItem_Value = Assembler.Stack.Peek();
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#if DOTNETCOMPATIBLE
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if (xStackItem_Value.Size == 4)
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#else
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if (xStackItem_Value.Size <= 4)
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#endif
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new CPUx86.Compare { DestinationReg = CPUx86.Registers.ECX, SourceValue = 32 };
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else if (xStackItem_Value.Size == 8)
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new CPUx86.Compare { DestinationReg = CPUx86.Registers.ECX, SourceValue = 64 };
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else
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throw new NotSupportedException(string.Format("A value of size {0:D} is not useable, yet!", xStackItem_Value.Size));
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new CPUx86.ConditionalJump { Condition = CPUx86.ConditionalTestEnum.AboveOrEqual, DestinationLabel = ResultIsZero };
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if (xStackItem_Value.Size == 4)
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{
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new CPUx86.ShiftLeft { DestinationReg = CPUx86.Registers.ESP, Size = 32, DestinationIsIndirect = true, SourceReg = CPUx86.Registers.CL };
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new CPUx86.Jump { DestinationLabel = End_Shl };
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}
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else if (xStackItem_Value.Size == 8)
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{
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new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX }; // value low part
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// shift higher part
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new CPUx86.ShiftLeftDouble { DestinationReg = CPUx86.Registers.ESP, DestinationIsIndirect = true, SourceReg = CPUx86.Registers.EAX, ArgumentReg = CPUx86.Registers.CL };
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// shift lower part
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new CPUx86.ShiftLeft { DestinationReg = CPUx86.Registers.EAX, Size = 32, SourceReg = CPUx86.Registers.CL };
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new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX };
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new CPUx86.Jump { DestinationLabel = End_Shl };
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}
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new Label(ResultIsZero);
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//replace unknown number with a zero, if more or equal 32(64 to shift
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if (xStackItem_ShiftAmount.Size == 8)
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{
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new CPUx86.Move { DestinationReg = CPUx86.Registers.ESP, DestinationIsIndirect = true, Size = 64, SourceValue = 0 };
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}
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else
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{
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new CPUx86.Move { DestinationReg = CPUx86.Registers.ESP, DestinationIsIndirect = true, Size = 32, SourceValue = 0 };
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}
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new Label(End_Shl);
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}
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}
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} |