mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-30 21:00:30 +00:00
62 lines
No EOL
2.1 KiB
C#
62 lines
No EOL
2.1 KiB
C#
using System;
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using System.IO;
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using Mono.Cecil;
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using Mono.Cecil.Cil;
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using CPU = Indy.IL2CPU.Assembler.X86;
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namespace Indy.IL2CPU.IL.X86 {
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[OpCode(Code.Ldfld)]
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public class Ldfld: Op {
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public Ldfld(Mono.Cecil.Cil.Instruction aInstruction, MethodInformation aMethodInfo)
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: base(aInstruction, aMethodInfo) {
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FieldDefinition xField = aInstruction.Operand as FieldDefinition;
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if (xField == null) {
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FieldReference xFieldRef = aInstruction.Operand as FieldReference;
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if (xFieldRef == null) {
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string typeName = aInstruction.Operand == null ? "" : aInstruction.Operand.GetType().FullName;
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throw new Exception("Field not found! (Operand = '" + (aInstruction.Operand ?? "**NULL**") + "'[" + typeName + "])");
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}
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xField = Engine.GetDefinitionFromFieldReference(xFieldRef);
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}
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string xFieldId = xField.ToString();
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TypeInformation.Field xTheField;
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int xStorageSize;
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xTheField = Engine.GetTypeFieldInfo(Engine.GetDefinitionFromTypeReference(xField.DeclaringType), out xStorageSize)[xFieldId];
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RelativeAddress = xTheField.RelativeAddress;
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FieldSize = Engine.GetFieldStorageSize(xField.FieldType);
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if (FieldSize == 1 || FieldSize == 2 || FieldSize == 4)
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return;
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throw new NotSupportedException("FieldSizes other than 1, 2, 4 are not supported yet! (" + FieldSize + ")");
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}
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// todo: implement correct support for different field sizes
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public readonly string RelativeAddress;
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public readonly int FieldSize;
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public override void DoAssemble() {
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Pop("ecx");
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string xPushPrefix = "";
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string xRegister = "";
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switch (FieldSize) {
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case 1:
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xPushPrefix = "byte";
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xRegister = "al";
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break;
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case 2:
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xPushPrefix = "word";
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xRegister = "ax";
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break;
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case 4:
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xPushPrefix = "dword";
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xRegister = "eax";
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break;
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}
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Assembler.StackSizes.Pop();
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Assembler.StackSizes.Push(FieldSize);
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Move(Assembler, "eax", "0");
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Move(Assembler, xPushPrefix + " " + xRegister, "[ecx " + RelativeAddress + "]");
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Push(Assembler, FieldSize, "eax");
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}
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}
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} |