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OpCodeTables: Improve thumb fast lookup

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This commit is contained in:
merry 2022-02-10 23:09:01 +00:00
parent 19c6c1c11c
commit e1bbf8d7b9
1 changed files with 13 additions and 8 deletions
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21
ARMeilleure/Decoders/OpCodeTable.cs
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@ -976,12 +976,12 @@ namespace ARMeilleure.Decoders
// T16
#endregion
FillFastLookupTable(InstA32FastLookup, AllInstA32);
FillFastLookupTable(InstT32FastLookup, AllInstT32);
FillFastLookupTable(InstA64FastLookup, AllInstA64);
FillFastLookupTable(InstA32FastLookup, AllInstA32, ToFastLookupIndexA);
FillFastLookupTable(InstT32FastLookup, AllInstT32, ToFastLookupIndexT);
FillFastLookupTable(InstA64FastLookup, AllInstA64, ToFastLookupIndexA);
}
private static void FillFastLookupTable(InstInfo[][] table, List<InstInfo> allInsts)
private static void FillFastLookupTable(InstInfo[][] table, List<InstInfo> allInsts, Func<int, int> ToFastLookupIndex)
{
List<InstInfo>[] temp = new List<InstInfo>[FastLookupSize];
@ -1104,17 +1104,17 @@ namespace ARMeilleure.Decoders
public static (InstDescriptor inst, MakeOp makeOp) GetInstA32(int opCode)
{
return GetInstFromList(InstA32FastLookup[ToFastLookupIndex(opCode)], opCode);
return GetInstFromList(InstA32FastLookup[ToFastLookupIndexA(opCode)], opCode);
}
public static (InstDescriptor inst, MakeOp makeOp) GetInstT32(int opCode)
{
return GetInstFromList(InstT32FastLookup[ToFastLookupIndex(opCode)], opCode);
return GetInstFromList(InstT32FastLookup[ToFastLookupIndexT(opCode)], opCode);
}
public static (InstDescriptor inst, MakeOp makeOp) GetInstA64(int opCode)
{
return GetInstFromList(InstA64FastLookup[ToFastLookupIndex(opCode)], opCode);
return GetInstFromList(InstA64FastLookup[ToFastLookupIndexA(opCode)], opCode);
}
private static (InstDescriptor inst, MakeOp makeOp) GetInstFromList(InstInfo[] insts, int opCode)
@ -1130,9 +1130,14 @@ namespace ARMeilleure.Decoders
return (new InstDescriptor(InstName.Und, InstEmit.Und), null);
}
private static int ToFastLookupIndex(int value)
private static int ToFastLookupIndexA(int value)
{
return ((value >> 10) & 0x00F) | ((value >> 18) & 0xFF0);
}
private static int ToFastLookupIndexT(int value)
{
return (value >> 4) & 0xFFF;
}
}
}