mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-20 21:08:51 +00:00
72092fc41d
[*] All conditional branch instructions on longs marked NotImplemented. [!] Someone familiar enough should review compiler's comparisons handling.
80 lines
2.8 KiB
C#
80 lines
2.8 KiB
C#
using System;
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using System.IO;
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using CPU = Indy.IL2CPU.Assembler;
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using CPUx86 = Indy.IL2CPU.Assembler.X86;
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using Indy.IL2CPU.Assembler;
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namespace Indy.IL2CPU.IL.X86 {
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[OpCode(OpCodeEnum.Bge)]
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public class Bge: Op {
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public readonly string TargetLabel;
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public readonly string CurInstructionLabel;
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public Bge(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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private void DoAssemble32Bit() {
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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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#warning Code checking: strange code seems to be generated. Read the following comments:
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//JumpAlways right after JumpIfGreaterOrEquals to the same label
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//my offer is:
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new CPUx86.Pop(CPUx86.Registers.EBX);
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new CPUx86.Pop(CPUx86.Registers.EAX);
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new CPUx86.Compare(CPUx86.Registers.EAX, CPUx86.Registers.EBX);
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new CPUx86.JumpIfGreaterOrEquals(LabelTrue);
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new CPUx86.JumpAlways(LabelFalse);
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new CPU.Label(LabelTrue);
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new CPUx86.JumpAlways(TargetLabel);
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new CPU.Label(LabelFalse);
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//new CPUx86.Pop(CPUx86.Registers.EAX);
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//new CPUx86.Compare(CPUx86.Registers.EAX, CPUx86.Registers.AtESP);
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//new CPUx86.JumpIfGreaterOrEquals(LabelTrue);
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//new CPUx86.JumpAlways(LabelTrue);
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//new CPU.Label(LabelTrue);
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//new CPUx86.Add(CPUx86.Registers.ESP, "4");
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//new CPUx86.JumpAlways(TargetLabel);
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//new CPU.Label(LabelFalse);
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//new CPUx86.Add(CPUx86.Registers.ESP, "4");
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}
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private void DoAssemble64Bit() {
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throw new NotImplementedException("long comprasion is not implemented");
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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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new CPUx86.Compare(CPUx86.Registers.EAX, "[esp + 4]");
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new CPUx86.JumpIfGreaterOrEquals(LabelFalse);
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new CPUx86.JumpAlways(LabelTrue);
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new CPU.Label(LabelTrue);
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new CPUx86.Add(CPUx86.Registers.ESP, "4");
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new CPUx86.JumpAlways(TargetLabel);
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new CPU.Label(LabelFalse);
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new CPUx86.Add(CPUx86.Registers.ESP, "4");
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}
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public override void DoAssemble() {
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StackContent xItem1 = Assembler.StackContents.Pop();
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StackContent xItem2 = Assembler.StackContents.Pop();
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int xSize = Math.Max(xItem1.Size, xItem2.Size);
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var xIsFloat = xItem1.IsFloat || xItem2.IsFloat;
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if (xIsFloat) {
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throw new Exception("Floats not yet supported!");
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}
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if (xSize > 8) {
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throw new Exception("StackSize>8 not supported");
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}
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if (xSize > 4) {
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DoAssemble64Bit();
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} else {
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DoAssemble32Bit();
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}
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}
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}
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}
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