mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-31 13:21:05 +00:00
77 lines
No EOL
3.3 KiB
C#
77 lines
No EOL
3.3 KiB
C#
using System;
|
|
using Indy.IL2CPU.Assembler;
|
|
using Mono.Cecil;
|
|
using Mono.Cecil.Cil;
|
|
using CPUx86 = Indy.IL2CPU.Assembler.X86;
|
|
|
|
namespace Indy.IL2CPU.IL.X86 {
|
|
[OpCode(Code.Stloc)]
|
|
public class Stloc: Op {
|
|
private bool mNeedsGC = false;
|
|
private MethodInformation.Variable mLocal;
|
|
private string mBaseLabel;
|
|
|
|
protected void SetLocalIndex(int aIndex, MethodInformation aMethodInfo) {
|
|
mLocal = aMethodInfo.Locals[aIndex];
|
|
mNeedsGC = aMethodInfo.Locals[aIndex].IsReferenceType;
|
|
mNeedsGC &= aMethodInfo.Locals[aIndex].VariableType.FullName != "System.String";
|
|
}
|
|
|
|
public Stloc(Mono.Cecil.Cil.Instruction aInstruction, MethodInformation aMethodInfo)
|
|
: base(aInstruction, aMethodInfo) {
|
|
int xLocalIndex;
|
|
mBaseLabel = GetInstructionLabel(aInstruction);
|
|
if (Int32.TryParse((aInstruction.Operand ?? "").ToString(), out xLocalIndex)) {
|
|
SetLocalIndex(xLocalIndex, aMethodInfo);
|
|
}
|
|
VariableDefinition xVarDef = aInstruction.Operand as VariableDefinition;
|
|
if (xVarDef != null) {
|
|
SetLocalIndex(xVarDef.Index, aMethodInfo);
|
|
}
|
|
}
|
|
|
|
public sealed override void DoAssemble() {
|
|
if (mNeedsGC) {
|
|
new CPUx86.Pushd("[" + mLocal.VirtualAddresses[0] + "]");
|
|
TypeSpecification xTypeSpec = mLocal.VariableType as TypeSpecification;
|
|
if (xTypeSpec != null) {
|
|
TypeDefinition xElementDef = Engine.GetDefinitionFromTypeReference(xTypeSpec.ElementType);
|
|
if ((!xElementDef.IsValueType) && xElementDef.FullName != "System.String") {
|
|
new CPUx86.Compare("dword " + CPUx86.Registers.AtESP, "0");
|
|
new CPUx86.JumpIfEquals(mBaseLabel + "_GC_LOCAL_CLEANUP_ENTRY_VAR_" + mLocal.Offset + "_END");
|
|
Op.Ldloc(Assembler, mLocal, false);
|
|
new CPUx86.Push("8");
|
|
Op.Add(Assembler);
|
|
new CPUx86.Pop(CPUx86.Registers.EDX); // total item count address
|
|
new CPUx86.Move(CPUx86.Registers.EBX, CPUx86.Registers.AtEDX);
|
|
new CPUx86.Add(CPUx86.Registers.EDX, "4");
|
|
new CPUx86.Move(CPUx86.Registers.ECX, "0"); // counter
|
|
new Label(mBaseLabel + "_GC_LOCAL_CLEANUP_ENTRY_VAR_" + mLocal.Offset);
|
|
new CPUx86.Compare(CPUx86.Registers.EBX, CPUx86.Registers.ECX);
|
|
new CPUx86.JumpIfEquals(mBaseLabel + "_GC_LOCAL_CLEANUP_ENTRY_VAR_" + mLocal.Offset + "_END");
|
|
new CPUx86.Push(CPUx86.Registers.EDX);
|
|
new CPUx86.Push(CPUx86.Registers.ECX);
|
|
new CPUx86.Push(CPUx86.Registers.EBX);
|
|
new CPUx86.Push("dword", CPUx86.Registers.AtEDX);
|
|
new CPUx86.Call(Label.GenerateLabelName(GCImplementationRefs.DecRefCountRef));
|
|
new CPUx86.Pop(CPUx86.Registers.EBX);
|
|
new CPUx86.Pop(CPUx86.Registers.ECX);
|
|
new CPUx86.Pop(CPUx86.Registers.EDX);
|
|
new CPUx86.Add(CPUx86.Registers.EDX, "4");
|
|
new CPUx86.Add(CPUx86.Registers.ECX, "1");
|
|
new CPUx86.JumpAlways(mBaseLabel + "_GC_LOCAL_CLEANUP_ENTRY_VAR_" + mLocal.Offset);
|
|
new Label(mBaseLabel + "_GC_LOCAL_CLEANUP_ENTRY_VAR_" + mLocal.Offset + "_END");
|
|
}
|
|
}
|
|
Engine.QueueMethodRef(GCImplementationRefs.DecRefCountRef);
|
|
new CPUx86.Call(Label.GenerateLabelName(GCImplementationRefs.DecRefCountRef));
|
|
}
|
|
foreach (string s in mLocal.VirtualAddresses) {
|
|
new CPUx86.Pop(CPUx86.Registers.EAX);
|
|
new CPUx86.Move("[" + s + "]", "eax");
|
|
}
|
|
// no need to inc again, items on the transient stack are also counted
|
|
Assembler.StackSizes.Pop();
|
|
}
|
|
}
|
|
} |