mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-08-19 21:52:22 +00:00
AOpCodeTable: Speed up instruction decoding (#284)
This commit is contained in:
parent
60f2198a1e
commit
bdb6cbb435
|
@ -4,6 +4,7 @@ using ChocolArm64.Instruction;
|
|||
using ChocolArm64.Instruction32;
|
||||
using ChocolArm64.State;
|
||||
using System;
|
||||
using System.Collections.Generic;
|
||||
|
||||
namespace ChocolArm64
|
||||
{
|
||||
|
@ -438,18 +439,43 @@ namespace ChocolArm64
|
|||
SetA64("0>001110<<0xxxxx001110xxxxxxxxxx", AInstEmit.Zip1_V, typeof(AOpCodeSimdReg));
|
||||
SetA64("0>001110<<0xxxxx011110xxxxxxxxxx", AInstEmit.Zip2_V, typeof(AOpCodeSimdReg));
|
||||
#endregion
|
||||
|
||||
#region "Generate InstA64FastLookup Table (AArch64)"
|
||||
var Tmp = new List<InstInfo>[FastLookupSize];
|
||||
for (int i = 0; i < FastLookupSize; i++)
|
||||
{
|
||||
Tmp[i] = new List<InstInfo>();
|
||||
}
|
||||
|
||||
foreach (var Inst in AllInstA64)
|
||||
{
|
||||
int Mask = ToFastLookupIndex(Inst.Mask);
|
||||
int Value = ToFastLookupIndex(Inst.Value);
|
||||
|
||||
for (int i = 0; i < FastLookupSize; i++)
|
||||
{
|
||||
if ((i & Mask) == Value)
|
||||
{
|
||||
Tmp[i].Add(Inst);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for (int i = 0; i < FastLookupSize; i++)
|
||||
{
|
||||
InstA64FastLookup[i] = Tmp[i].ToArray();
|
||||
}
|
||||
#endregion
|
||||
}
|
||||
|
||||
private class TreeNode
|
||||
private class InstInfo
|
||||
{
|
||||
public int Mask;
|
||||
public int Value;
|
||||
|
||||
public TreeNode Next;
|
||||
|
||||
public AInst Inst;
|
||||
|
||||
public TreeNode(int Mask, int Value, AInst Inst)
|
||||
public InstInfo(int Mask, int Value, AInst Inst)
|
||||
{
|
||||
this.Mask = Mask;
|
||||
this.Value = Value;
|
||||
|
@ -457,8 +483,11 @@ namespace ChocolArm64
|
|||
}
|
||||
}
|
||||
|
||||
private static TreeNode InstHeadA32;
|
||||
private static TreeNode InstHeadA64;
|
||||
private static List<InstInfo> AllInstA32 = new List<InstInfo>();
|
||||
private static List<InstInfo> AllInstA64 = new List<InstInfo>();
|
||||
|
||||
private static int FastLookupSize = 0x1000;
|
||||
private static InstInfo[][] InstA64FastLookup = new InstInfo[FastLookupSize][];
|
||||
|
||||
private static void SetA32(string Encoding, AInstInterpreter Interpreter, Type Type)
|
||||
{
|
||||
|
@ -519,7 +548,7 @@ namespace ChocolArm64
|
|||
|
||||
if (XBits == 0)
|
||||
{
|
||||
InsertTop(XMask, Value, Inst, Mode);
|
||||
InsertInst(XMask, Value, Inst, Mode);
|
||||
|
||||
return;
|
||||
}
|
||||
|
@ -535,55 +564,53 @@ namespace ChocolArm64
|
|||
|
||||
if (Mask != Blacklisted)
|
||||
{
|
||||
InsertTop(XMask, Value | Mask, Inst, Mode);
|
||||
InsertInst(XMask, Value | Mask, Inst, Mode);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private static void InsertTop(
|
||||
private static void InsertInst(
|
||||
int XMask,
|
||||
int Value,
|
||||
AInst Inst,
|
||||
AExecutionMode Mode)
|
||||
{
|
||||
TreeNode Node = new TreeNode(XMask, Value, Inst);
|
||||
InstInfo Info = new InstInfo(XMask, Value, Inst);
|
||||
|
||||
if (Mode == AExecutionMode.AArch64)
|
||||
{
|
||||
Node.Next = InstHeadA64;
|
||||
|
||||
InstHeadA64 = Node;
|
||||
AllInstA64.Add(Info);
|
||||
}
|
||||
else
|
||||
{
|
||||
Node.Next = InstHeadA32;
|
||||
|
||||
InstHeadA32 = Node;
|
||||
AllInstA32.Add(Info);
|
||||
}
|
||||
}
|
||||
|
||||
public static AInst GetInstA32(int OpCode)
|
||||
{
|
||||
return GetInst(InstHeadA32, OpCode);
|
||||
return GetInstFromList(AllInstA32, OpCode);
|
||||
}
|
||||
|
||||
public static AInst GetInstA64(int OpCode)
|
||||
{
|
||||
return GetInst(InstHeadA64, OpCode);
|
||||
return GetInstFromList(InstA64FastLookup[ToFastLookupIndex(OpCode)], OpCode);
|
||||
}
|
||||
|
||||
private static AInst GetInst(TreeNode Head, int OpCode)
|
||||
private static int ToFastLookupIndex(int Value)
|
||||
{
|
||||
TreeNode Node = Head;
|
||||
return ((Value >> 10) & 0x00F) | ((Value >> 18) & 0xFF0);
|
||||
}
|
||||
|
||||
do
|
||||
private static AInst GetInstFromList(IEnumerable<InstInfo> InstList, int OpCode)
|
||||
{
|
||||
foreach (var Node in InstList)
|
||||
{
|
||||
if ((OpCode & Node.Mask) == Node.Value)
|
||||
{
|
||||
return Node.Inst;
|
||||
}
|
||||
}
|
||||
while ((Node = Node.Next) != null);
|
||||
|
||||
return AInst.Undefined;
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue