mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-19 12:30:32 +00:00
57 lines
2 KiB
C#
57 lines
2 KiB
C#
using Cosmos.Assembler.x86;
|
|
using Cosmos.IL2CPU.ILOpCodes;
|
|
using XSharp.Compiler;
|
|
using static XSharp.Compiler.XSRegisters;
|
|
|
|
using ObjectInfo = Cosmos.IL2CPU.Plugs.System.ObjectImpl;
|
|
using SysReflection = System.Reflection;
|
|
|
|
namespace Cosmos.IL2CPU.X86.IL
|
|
{
|
|
[Cosmos.IL2CPU.OpCode(ILOpCode.Code.Unbox)]
|
|
public class Unbox : ILOp
|
|
{
|
|
public Unbox(Cosmos.Assembler.Assembler aAsmblr)
|
|
: base(aAsmblr)
|
|
{
|
|
}
|
|
|
|
public override void Execute(MethodInfo aMethod, ILOpCode aOpCode)
|
|
{
|
|
DoNullReferenceCheck(Assembler, DebugEnabled, 0);
|
|
OpType xType = (OpType)aOpCode;
|
|
string xTypeID = GetTypeIDLabel(xType.Value);
|
|
string xBaseLabel = GetLabel(aMethod, aOpCode) + ".";
|
|
string mReturnNullLabel = xBaseLabel + "_ReturnNull";
|
|
uint xTypeSize = SizeOfType(xType.Value);
|
|
|
|
XS.Compare(EAX, 0);
|
|
XS.Jump(ConditionalTestEnum.Zero, mReturnNullLabel);
|
|
XS.Set(EAX, EAX, sourceIsIndirect: true);
|
|
XS.Push(EAX, isIndirect: true);
|
|
XS.Push(xTypeID, isIndirect: true);
|
|
SysReflection.MethodBase xMethodIsInstance = ReflectionUtilities.GetMethodBase(typeof(VTablesImpl), "IsInstance", "System.UInt32", "System.UInt32");
|
|
Call.DoExecute(Assembler, aMethod, xMethodIsInstance, aOpCode, GetLabel(aMethod, aOpCode), xBaseLabel + "_After_IsInstance_Call", DebugEnabled);
|
|
XS.Label(xBaseLabel + "_After_IsInstance_Call");
|
|
XS.Pop(EAX);
|
|
XS.Compare(EAX, 0);
|
|
XS.Jump(ConditionalTestEnum.Equal, mReturnNullLabel);
|
|
XS.Pop(EAX);
|
|
uint xSize = xTypeSize;
|
|
if (xSize % 4 > 0)
|
|
{
|
|
xSize += 4 - (xSize % 4);
|
|
}
|
|
int xItems = (int)xSize / 4;
|
|
for (int i = xItems - 1; i >= 0; i--)
|
|
{
|
|
XS.Push(EAX, displacement: (i * 4) + ObjectInfo.FieldDataOffset);
|
|
//new Push { DestinationReg = EAX, DestinationIsIndirect = true, DestinationDisplacement = ((i * 4) + ObjectInfo.FieldDataOffset) };
|
|
}
|
|
XS.Jump(GetLabel(aMethod, aOpCode.NextPosition));
|
|
XS.Label(mReturnNullLabel);
|
|
XS.Add(ESP, 4);
|
|
XS.Push(0);
|
|
}
|
|
}
|
|
}
|