mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-29 20:30:44 +00:00
88 lines
No EOL
3.4 KiB
C#
88 lines
No EOL
3.4 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.Stsfld)]
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public class Stsfld: Op {
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private string mDataName;
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private int mSize;
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private TypeReference mDataType;
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private bool mNeedsGC;
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private string mBaseLabel;
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public Stsfld(Mono.Cecil.Cil.Instruction aInstruction, MethodInformation aMethodInfo)
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: base(aInstruction, aMethodInfo) {
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FieldReference xField = (FieldReference)aInstruction.Operand;
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mSize = Engine.GetFieldStorageSize(xField.FieldType);
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Engine.QueueStaticField(xField, out mDataName);
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mNeedsGC = !xField.FieldType.IsValueType && xField.FieldType.FullName != "System.String";
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mDataType = xField.FieldType;
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mBaseLabel = GetInstructionLabel(aInstruction);
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}
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public override void DoAssemble() {
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if (mNeedsGC) {
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new CPUx86.Pushd("[" + mDataName + "]");
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TypeSpecification xTypeSpec = mDataType 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_END");
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new CPUx86.Pushd("[" + mDataName + "]");
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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");
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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_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");
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new Label(mBaseLabel + "_GC_LOCAL_CLEANUP_ENTRY_VAR_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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for (int i = 1; i <= (mSize / 4); i++) {
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new CPUx86.Pop(CPUx86.Registers.EAX);
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new CPUx86.Move("dword [" + mDataName + " + 0x" + (mSize - (i * 4)).ToString("X") + "]", "eax");
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}
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switch (mSize % 4) {
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case 1: {
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new CPUx86.Pop(CPUx86.Registers.EAX);
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new CPUx86.Move("byte [" + mDataName + "]", "al");
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break;
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}
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case 2: {
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new CPUx86.Pop(CPUx86.Registers.EAX);
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new CPUx86.Move("word [" + mDataName + "]", "ax");
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break;
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}
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case 0: {
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break;
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}
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default:
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throw new Exception("Remainder size " + (mSize % 4) + " not supported!");
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}
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Assembler.StackSizes.Pop();
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}
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}
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} |