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ryujinx-final/ChocolArm64/TranslatedSub.cs

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C#
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using ChocolArm64.Memory;
using ChocolArm64.State;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Reflection;
using System.Reflection.Emit;
namespace ChocolArm64
{
class TranslatedSub
{
private delegate long Aa64Subroutine(CpuThreadState register, MemoryManager memory);
private const int MinCallCountForReJit = 250;
private Aa64Subroutine _execDelegate;
public static int StateArgIdx { get; private set; }
public static int MemoryArgIdx { get; private set; }
public static Type[] FixedArgTypes { get; private set; }
public DynamicMethod Method { get; private set; }
public ReadOnlyCollection<Register> Params { get; private set; }
private HashSet<long> _callers;
private TranslatedSubType _type;
private int _callCount;
private bool _needsReJit;
public TranslatedSub(DynamicMethod method, List<Register> Params)
{
if (method == null)
{
throw new ArgumentNullException(nameof(method));
}
if (Params == null)
{
throw new ArgumentNullException(nameof(Params));
}
Method = method;
this.Params = Params.AsReadOnly();
_callers = new HashSet<long>();
PrepareDelegate();
}
static TranslatedSub()
{
MethodInfo mthdInfo = typeof(Aa64Subroutine).GetMethod("Invoke");
ParameterInfo[] Params = mthdInfo.GetParameters();
FixedArgTypes = new Type[Params.Length];
for (int index = 0; index < Params.Length; index++)
{
Type paramType = Params[index].ParameterType;
FixedArgTypes[index] = paramType;
if (paramType == typeof(CpuThreadState))
{
StateArgIdx = index;
}
else if (paramType == typeof(MemoryManager))
{
MemoryArgIdx = index;
}
}
}
private void PrepareDelegate()
{
string name = $"{Method.Name}_Dispatch";
DynamicMethod mthd = new DynamicMethod(name, typeof(long), FixedArgTypes);
ILGenerator generator = mthd.GetILGenerator();
generator.EmitLdargSeq(FixedArgTypes.Length);
foreach (Register reg in Params)
{
generator.EmitLdarg(StateArgIdx);
generator.Emit(OpCodes.Ldfld, reg.GetField());
}
generator.Emit(OpCodes.Call, Method);
generator.Emit(OpCodes.Ret);
_execDelegate = (Aa64Subroutine)mthd.CreateDelegate(typeof(Aa64Subroutine));
}
public bool ShouldReJit()
{
if (_needsReJit && _callCount < MinCallCountForReJit)
{
_callCount++;
return false;
}
return _needsReJit;
}
public long Execute(CpuThreadState threadState, MemoryManager memory)
{
return _execDelegate(threadState, memory);
}
public void AddCaller(long position)
{
lock (_callers)
{
_callers.Add(position);
}
}
public long[] GetCallerPositions()
{
lock (_callers)
{
return _callers.ToArray();
}
}
public void SetType(TranslatedSubType type)
{
_type = type;
if (type == TranslatedSubType.SubTier0)
{
_needsReJit = true;
}
}
public void MarkForReJit() => _needsReJit = true;
}
}