mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-30 04:40:14 +00:00
79 lines
No EOL
2.6 KiB
C#
79 lines
No EOL
2.6 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.Ldsfld)]
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public class Ldsfld: Op {
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private string mDataName;
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private int mSize;
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private bool mNeedsGC;
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public Ldsfld(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(Engine.GetDefinitionFromFieldReference(xField), out mDataName);
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mNeedsGC = !Engine.GetDefinitionFromTypeReference(xField.FieldType).IsValueType && xField.FieldType.FullName != "System.String";
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}
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public override void DoAssemble() {
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if (mSize >= 4) {
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for (int i = 0; i < (mSize / 4); i++) {
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// Pop("eax");
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// Move(Assembler, "dword [" + mDataName + " + 0x" + (i * 4).ToString("X") + "]", "eax");
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new CPUx86.Pushd("[" + mDataName + " + 0x" + (i * 4).ToString("X") + "]");
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}
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switch (mSize % 4) {
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case 1: {
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new CPUx86.Move(CPUx86.Registers.EAX, "0");
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new CPUx86.Move(CPUx86.Registers.AL, "[" + mDataName + " + 0x" + (mSize - 1).ToString("X") + "]");
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new CPUx86.Push(CPUx86.Registers.EAX);
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break;
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}
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case 2: {
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new CPUx86.Move(CPUx86.Registers.EAX, "0");
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new CPUx86.Move(CPUx86.Registers.AX, "[" + mDataName + " + 0x" + (mSize - 2).ToString("X") + "]");
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new CPUx86.Push(CPUx86.Registers.EAX);
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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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} else {
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switch (mSize) {
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case 1: {
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new CPUx86.Move(CPUx86.Registers.EAX, "0");
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new CPUx86.Move(CPUx86.Registers.AL, "[" + mDataName + "]");
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new CPUx86.Push(CPUx86.Registers.EAX);
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break;
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}
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case 2: {
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new CPUx86.Move(CPUx86.Registers.EAX, "0");
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new CPUx86.Move(CPUx86.Registers.AX, "[" + mDataName + "]");
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new CPUx86.Push(CPUx86.Registers.EAX);
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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) + " not supported!");
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}
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}
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Assembler.StackSizes.Push(mSize);
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if (mNeedsGC) {
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new Dup(null, null) {
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Assembler = this.Assembler
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}.
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Assemble();
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Engine.QueueMethodRef(GCImplementationRefs.IncRefCountRef);
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new CPUx86.Call(Label.GenerateLabelName(GCImplementationRefs.IncRefCountRef));
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}
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}
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}
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} |