mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-20 12:58:39 +00:00
50 lines
No EOL
1.8 KiB
C#
50 lines
No EOL
1.8 KiB
C#
using System;
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using System.Linq;
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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 CPU = Indy.IL2CPU.Assembler;
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using CPUx86 = Indy.IL2CPU.Assembler.X86;
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using Instruction = Mono.Cecil.Cil.Instruction;
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namespace Indy.IL2CPU.IL.X86 {
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[OpCode(Code.Box, false)]
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public class Box: Op {
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private int mTheSize;
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private int mTypeId;
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public Box(Instruction aInstruction, MethodInformation aMethodInfo)
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: base(aInstruction, aMethodInfo) {
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TypeReference xTypeRef = aInstruction.Operand as TypeReference;
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if (xTypeRef == null) {
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throw new Exception("Couldn't determine Type!");
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}
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if (xTypeRef is GenericParameter) {
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// todo: implement support for generics
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mTheSize = 4;
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} else {
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mTheSize = Engine.GetFieldStorageSize(xTypeRef);
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}
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if (((mTheSize / 4) * 4) != mTheSize) {
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throw new Exception("Incorrect Datasize. ( ((mTheSize / 4) * 4) === mTheSize should evaluate to true!");
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}
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//if (!(xTypeRef is GenericParameter)) {
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mTypeId = Engine.RegisterType(Engine.GetDefinitionFromTypeReference(xTypeRef));
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//}
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}
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public override void DoAssemble() {
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new CPUx86.Pushd("0x" + (mTheSize + ObjectImpl.FieldDataOffset).ToString("X").ToUpper());
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new CPUx86.Call(CPU.Label.GenerateLabelName(RuntimeEngineRefs.Heap_AllocNewObjectRef));
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new CPUx86.Move("dword", CPUx86.Registers.AtEAX, "0x" + mTypeId.ToString("X"));
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new CPUx86.Move("dword", "[eax + 4]", "0x" + InstanceTypeEnum.BoxedValueType.ToString("X"));
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for (int i = 0; i < (mTheSize / 4); i++) {
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new CPUx86.Pop(CPUx86.Registers.EDX);
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new CPUx86.Move("dword", "[eax + 0x" + (ObjectImpl.FieldDataOffset + (i * 4)).ToString("X") + "]", "edx");
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}
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Assembler.StackSizes.Pop();
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new CPUx86.Pushd(CPUx86.Registers.EAX);
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Assembler.StackSizes.Push(4);
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}
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}
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} |