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Move the MakeOp to OpCodeTable class, for reduce the use of ConcurrentDictionary (#996)

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Chenj168 2020-03-20 13:15:37 +09:00 • committed by GitHub
parent 8e64984158
commit 31b94f4641
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2 changed files with 35 additions and 47 deletions
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35
ARMeilleure/Decoders/OpCodeTable.cs
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@ -2,11 +2,14 @@ using ARMeilleure.Instructions;
using ARMeilleure.State;
using System;
using System.Collections.Generic;
using System.Reflection.Emit;
namespace ARMeilleure.Decoders
{
static class OpCodeTable
{
public delegate object MakeOp(InstDescriptor inst, ulong address, int opCode);
private const int FastLookupSize = 0x1000;
private struct InstInfo
@ -18,12 +21,32 @@ namespace ARMeilleure.Decoders
public Type Type { get; }
public MakeOp MakeOp { get; }
public InstInfo(int mask, int value, InstDescriptor inst, Type type)
{
Mask = mask;
Value = value;
Inst = inst;
Type = type;
MakeOp = CacheOpActivator(type);
}
private static MakeOp CacheOpActivator(Type type)
{
Type[] argTypes = new Type[] { typeof(InstDescriptor), typeof(ulong), typeof(int) };
DynamicMethod mthd = new DynamicMethod($"Make{type.Name}", type, argTypes);
ILGenerator generator = mthd.GetILGenerator();
generator.Emit(OpCodes.Ldarg_0);
generator.Emit(OpCodes.Ldarg_1);
generator.Emit(OpCodes.Ldarg_2);
generator.Emit(OpCodes.Newobj, type.GetConstructor(argTypes));
generator.Emit(OpCodes.Ret);
return (MakeOp)mthd.CreateDelegate(typeof(MakeOp));
}
}
@ -1034,32 +1057,32 @@ namespace ARMeilleure.Decoders
}
}
public static (InstDescriptor inst, Type type) GetInstA32(int opCode)
public static (InstDescriptor inst, MakeOp makeOp) GetInstA32(int opCode)
{
return GetInstFromList(_instA32FastLookup[ToFastLookupIndex(opCode)], opCode);
}
public static (InstDescriptor inst, Type type) GetInstT32(int opCode)
public static (InstDescriptor inst, MakeOp makeOp) GetInstT32(int opCode)
{
return GetInstFromList(_instT32FastLookup[ToFastLookupIndex(opCode)], opCode);
}
public static (InstDescriptor inst, Type type) GetInstA64(int opCode)
public static (InstDescriptor inst, MakeOp makeOp) GetInstA64(int opCode)
{
return GetInstFromList(_instA64FastLookup[ToFastLookupIndex(opCode)], opCode);
}
private static (InstDescriptor inst, Type type) GetInstFromList(InstInfo[] insts, int opCode)
private static (InstDescriptor inst, MakeOp makeOp) GetInstFromList(InstInfo[] insts, int opCode)
{
foreach (InstInfo info in insts)
{
if ((opCode & info.Mask) == info.Value)
{
return (info.Inst, info.Type);
return (info.Inst, info.MakeOp);
}
}
return (new InstDescriptor(InstName.Und, InstEmit.Und), typeof(OpCode));
return (new InstDescriptor(InstName.Und, InstEmit.Und), null);
}
private static int ToFastLookupIndex(int value)