mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-31 21:30:19 +00:00
77 lines
No EOL
3.3 KiB
C#
77 lines
No EOL
3.3 KiB
C#
using System;
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using Indy.IL2CPU.Assembler;
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using Mono.Cecil;
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using Mono.Cecil.Cil;
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using CPUx86 = Indy.IL2CPU.Assembler.X86;
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namespace Indy.IL2CPU.IL.X86 {
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[OpCode(Code.Stloc)]
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public class Stloc: Op {
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private bool mNeedsGC = false;
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private MethodInformation.Variable mLocal;
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private string mBaseLabel;
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protected void SetLocalIndex(int aIndex, MethodInformation aMethodInfo) {
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mLocal = aMethodInfo.Locals[aIndex];
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mNeedsGC = aMethodInfo.Locals[aIndex].IsReferenceType;
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mNeedsGC &= aMethodInfo.Locals[aIndex].VariableType.FullName != "System.String";
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}
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public Stloc(Mono.Cecil.Cil.Instruction aInstruction, MethodInformation aMethodInfo)
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: base(aInstruction, aMethodInfo) {
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int xLocalIndex;
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mBaseLabel = GetInstructionLabel(aInstruction);
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if (Int32.TryParse((aInstruction.Operand ?? "").ToString(), out xLocalIndex)) {
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SetLocalIndex(xLocalIndex, aMethodInfo);
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}
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VariableDefinition xVarDef = aInstruction.Operand as VariableDefinition;
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if (xVarDef != null) {
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SetLocalIndex(xVarDef.Index, aMethodInfo);
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}
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}
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public sealed override void DoAssemble() {
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if (mNeedsGC) {
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new CPUx86.Pushd("[" + mLocal.VirtualAddresses[0] + "]");
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TypeSpecification xTypeSpec = mLocal.VariableType as TypeSpecification;
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if (xTypeSpec != null) {
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TypeDefinition xElementDef = Engine.GetDefinitionFromTypeReference(xTypeSpec.ElementType);
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if ((!xElementDef.IsValueType) && xElementDef.FullName != "System.String") {
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new CPUx86.Compare("dword " + CPUx86.Registers.AtESP, "0");
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new CPUx86.JumpIfEquals(mBaseLabel + "_GC_LOCAL_CLEANUP_ENTRY_VAR_" + mLocal.Offset + "_END");
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Op.Ldloc(Assembler, mLocal, false);
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new CPUx86.Push("8");
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Op.Add(Assembler);
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new CPUx86.Pop(CPUx86.Registers.EDX); // total item count address
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new CPUx86.Move(CPUx86.Registers.EBX, CPUx86.Registers.AtEDX);
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new CPUx86.Add(CPUx86.Registers.EDX, "4");
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new CPUx86.Move(CPUx86.Registers.ECX, "0"); // counter
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new Label(mBaseLabel + "_GC_LOCAL_CLEANUP_ENTRY_VAR_" + mLocal.Offset);
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new CPUx86.Compare(CPUx86.Registers.EBX, CPUx86.Registers.ECX);
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new CPUx86.JumpIfEquals(mBaseLabel + "_GC_LOCAL_CLEANUP_ENTRY_VAR_" + mLocal.Offset + "_END");
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new CPUx86.Push(CPUx86.Registers.EDX);
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new CPUx86.Push(CPUx86.Registers.ECX);
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new CPUx86.Push(CPUx86.Registers.EBX);
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new CPUx86.Push("dword", CPUx86.Registers.AtEDX);
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new CPUx86.Call(Label.GenerateLabelName(GCImplementationRefs.DecRefCountRef));
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new CPUx86.Pop(CPUx86.Registers.EBX);
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new CPUx86.Pop(CPUx86.Registers.ECX);
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new CPUx86.Pop(CPUx86.Registers.EDX);
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new CPUx86.Add(CPUx86.Registers.EDX, "4");
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new CPUx86.Add(CPUx86.Registers.ECX, "1");
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new CPUx86.JumpAlways(mBaseLabel + "_GC_LOCAL_CLEANUP_ENTRY_VAR_" + mLocal.Offset);
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new Label(mBaseLabel + "_GC_LOCAL_CLEANUP_ENTRY_VAR_" + mLocal.Offset + "_END");
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}
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}
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Engine.QueueMethodRef(GCImplementationRefs.DecRefCountRef);
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new CPUx86.Call(Label.GenerateLabelName(GCImplementationRefs.DecRefCountRef));
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}
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foreach (string s in mLocal.VirtualAddresses) {
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new CPUx86.Pop(CPUx86.Registers.EAX);
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new CPUx86.Move("[" + s + "]", "eax");
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}
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// no need to inc again, items on the transient stack are also counted
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Assembler.StackSizes.Pop();
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}
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}
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} |