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Misc. CPU optimizations (#575) 

* Add optimizations related to caller/callee saved registers, thread synchronization and disable tier 0

* Refactoring

* Add a config entry to enable or disable the reg load/store opt.

* Remove unnecessary register state stores for calls when the callee is know

* Rename IoType to VarType

* Enable tier 0 while fixing some perf issues related to tier 0

* Small tweak -- Compile before adding to the cache, to avoid lags

* Add required config entry
This commit is contained in:
gdkchan 2019-02-27 23:03:31 -03:00 committed by jduncanator
parent f2d37d52f7
commit 8d5a48ba0a
25 changed files with 424 additions and 273 deletions
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3
Instructions/InstEmitFlow.cs
View File

@ -39,7 +39,6 @@ namespace ChocolArm64.Instructions
context.EmitLdc_I(op.Position + 4);
context.EmitStint(RegisterAlias.Lr);
context.EmitStoreState();
EmitCall(context, op.Imm);
}
@ -60,6 +59,8 @@ namespace ChocolArm64.Instructions
{
OpCodeBReg64 op = (OpCodeBReg64)context.CurrOp;
context.HasIndirectJump = true;
context.EmitStoreState();
context.EmitLdintzr(op.Rn);

1
Instructions/InstEmitFlow32.cs
View File

@ -65,7 +65,6 @@ namespace ChocolArm64.Instructions
}
context.EmitStint(GetBankedRegisterAlias(context.Mode, RegisterAlias.Aarch32Lr));
context.EmitStoreState();
//If x is true, then this is a branch with link and exchange.
//In this case we need to swap the mode between Arm <-> Thumb.

26
Instructions/InstEmitFlowHelper.cs
View File

@ -11,6 +11,8 @@ namespace ChocolArm64.Instructions
{
if (context.Tier == TranslationTier.Tier0)
{
context.EmitStoreState();
context.TranslateAhead(imm);
context.EmitLdc_I8(imm);
@ -22,6 +24,10 @@ namespace ChocolArm64.Instructions
if (!context.TryOptEmitSubroutineCall())
{
context.HasSlowCall = true;
context.EmitStoreState();
context.TranslateAhead(imm);
context.EmitLdarg(TranslatedSub.StateArgIdx);
@ -32,6 +38,7 @@ namespace ChocolArm64.Instructions
context.EmitLdarg(TranslatedSub.StateArgIdx);
context.EmitLdc_I8(imm);
context.EmitLdc_I4((int)CallType.Call);
context.EmitPrivateCall(typeof(Translator), nameof(Translator.GetOrTranslateSubroutine));
@ -58,20 +65,6 @@ namespace ChocolArm64.Instructions
{
if (context.Tier == TranslationTier.Tier0)
{
context.Emit(OpCodes.Dup);
context.EmitSttmp();
context.EmitLdarg(TranslatedSub.StateArgIdx);
context.EmitFieldLoad(typeof(CpuThreadState).GetField(nameof(CpuThreadState.CurrentTranslator),
BindingFlags.Instance |
BindingFlags.NonPublic));
context.EmitLdarg(TranslatedSub.StateArgIdx);
context.EmitLdtmp();
context.EmitPrivateCall(typeof(Translator), nameof(Translator.TranslateVirtualSubroutine));
context.Emit(OpCodes.Ret);
}
else
@ -85,8 +78,11 @@ namespace ChocolArm64.Instructions
context.EmitLdarg(TranslatedSub.StateArgIdx);
context.EmitLdtmp();
context.EmitLdc_I4(isJump
? (int)CallType.VirtualJump
: (int)CallType.VirtualCall);
context.EmitPrivateCall(typeof(Translator), nameof(Translator.GetOrTranslateVirtualSubroutine));
context.EmitPrivateCall(typeof(Translator), nameof(Translator.GetOrTranslateSubroutine));
context.EmitLdarg(TranslatedSub.StateArgIdx);
context.EmitLdarg(TranslatedSub.MemoryArgIdx);

32
Optimizations.cs
View File

@ -2,21 +2,23 @@ using System.Runtime.Intrinsics.X86;
public static class Optimizations
{
internal static bool FastFP = true;
public static bool AssumeStrictAbiCompliance { get; set; }
private static bool _useAllSseIfAvailable = true;
public static bool FastFP { get; set; } = true;
private static bool _useSseIfAvailable = true;
private static bool _useSse2IfAvailable = true;
private static bool _useSse3IfAvailable = true;
private static bool _useSsse3IfAvailable = true;
private static bool _useSse41IfAvailable = true;
private static bool _useSse42IfAvailable = true;
private const bool UseAllSseIfAvailable = true;
internal static bool UseSse = (_useAllSseIfAvailable && _useSseIfAvailable) && Sse.IsSupported;
internal static bool UseSse2 = (_useAllSseIfAvailable && _useSse2IfAvailable) && Sse2.IsSupported;
internal static bool UseSse3 = (_useAllSseIfAvailable && _useSse3IfAvailable) && Sse3.IsSupported;
internal static bool UseSsse3 = (_useAllSseIfAvailable && _useSsse3IfAvailable) && Ssse3.IsSupported;
internal static bool UseSse41 = (_useAllSseIfAvailable && _useSse41IfAvailable) && Sse41.IsSupported;
internal static bool UseSse42 = (_useAllSseIfAvailable && _useSse42IfAvailable) && Sse42.IsSupported;
}
public static bool UseSseIfAvailable { get; set; } = UseAllSseIfAvailable;
public static bool UseSse2IfAvailable { get; set; } = UseAllSseIfAvailable;
public static bool UseSse3IfAvailable { get; set; } = UseAllSseIfAvailable;
public static bool UseSsse3IfAvailable { get; set; } = UseAllSseIfAvailable;
public static bool UseSse41IfAvailable { get; set; } = UseAllSseIfAvailable;
public static bool UseSse42IfAvailable { get; set; } = UseAllSseIfAvailable;
internal static bool UseSse => UseSseIfAvailable && Sse.IsSupported;
internal static bool UseSse2 => UseSse2IfAvailable && Sse2.IsSupported;
internal static bool UseSse3 => UseSse3IfAvailable && Sse3.IsSupported;
internal static bool UseSsse3 => UseSsse3IfAvailable && Ssse3.IsSupported;
internal static bool UseSse41 => UseSse41IfAvailable && Sse41.IsSupported;
internal static bool UseSse42 => UseSse42IfAvailable && Sse42.IsSupported;
}

9
Translation/CallType.cs Normal file
View File

@ -0,0 +1,9 @@
namespace ChocolArm64.Translation
{
enum CallType
{
Call,
VirtualCall,
VirtualJump
}
}

32
Translation/ILBlock.cs
View File

@ -4,13 +4,13 @@ namespace ChocolArm64.Translation
{
class ILBlock : IILEmit
{
public long IntInputs { get; private set; }
public long IntOutputs { get; private set; }
public long IntAwOutputs { get; private set; }
public long IntInputs { get; private set; }
public long IntOutputs { get; private set; }
private long _intAwOutputs;
public long VecInputs { get; private set; }
public long VecOutputs { get; private set; }
public long VecAwOutputs { get; private set; }
public long VecInputs { get; private set; }
public long VecOutputs { get; private set; }
private long _vecAwOutputs;
public bool HasStateStore { get; private set; }
@ -34,25 +34,25 @@ namespace ChocolArm64.Translation
//opcodes emitted by each ARM instruction.
//We can only consider the new outputs for doing input elimination
//after all the CIL opcodes used by the instruction being emitted.
IntAwOutputs = IntOutputs;
VecAwOutputs = VecOutputs;
_intAwOutputs = IntOutputs;
_vecAwOutputs = VecOutputs;
}
else if (emitter is ILOpCodeLoad ld && ILMethodBuilder.IsRegIndex(ld.Index))
{
switch (ld.IoType)
switch (ld.VarType)
{
case IoType.Flag: IntInputs |= ((1L << ld.Index) << 32) & ~IntAwOutputs; break;
case IoType.Int: IntInputs |= (1L << ld.Index) & ~IntAwOutputs; break;
case IoType.Vector: VecInputs |= (1L << ld.Index) & ~VecAwOutputs; break;
case VarType.Flag: IntInputs |= ((1L << ld.Index) << 32) & ~_intAwOutputs; break;
case VarType.Int: IntInputs |= (1L << ld.Index) & ~_intAwOutputs; break;
case VarType.Vector: VecInputs |= (1L << ld.Index) & ~_vecAwOutputs; break;
}
}
else if (emitter is ILOpCodeStore st && ILMethodBuilder.IsRegIndex(st.Index))
{
switch (st.IoType)
switch (st.VarType)
{
case IoType.Flag: IntOutputs |= (1L << st.Index) << 32; break;
case IoType.Int: IntOutputs |= 1L << st.Index; break;
case IoType.Vector: VecOutputs |= 1L << st.Index; break;
case VarType.Flag: IntOutputs |= (1L << st.Index) << 32; break;
case VarType.Int: IntOutputs |= 1L << st.Index; break;
case VarType.Vector: VecOutputs |= 1L << st.Index; break;
}
}
else if (emitter is ILOpCodeStoreState)

89
Translation/ILEmitterCtx.cs
View File

@ -31,6 +31,10 @@ namespace ChocolArm64.Translation
public Aarch32Mode Mode { get; } = Aarch32Mode.User; //TODO
public bool HasIndirectJump { get; set; }
public bool HasSlowCall { get; set; }
private Dictionary<Block, ILBlock> _visitedBlocks;
private Queue<Block> _branchTargets;
@ -91,7 +95,12 @@ namespace ChocolArm64.Translation
ResetBlockState();
AdvanceOpCode();
if (AdvanceOpCode())
{
EmitSynchronization();
_ilBlock.Add(new ILOpCodeLoadState(_ilBlock, isSubEntry: true));
}
}
public static int GetIntTempIndex()
@ -127,10 +136,18 @@ namespace ChocolArm64.Translation
return;
}
if (_opcIndex == 0)
int opcIndex = _opcIndex;
if (opcIndex == 0)
{
MarkLabel(GetLabel(_currBlock.Position));
}
bool isLastOp = opcIndex == CurrBlock.OpCodes.Count - 1;
if (isLastOp && CurrBlock.Branch != null &&
(ulong)CurrBlock.Branch.Position <= (ulong)CurrBlock.Position)
{
EmitSynchronization();
}
@ -161,7 +178,7 @@ namespace ChocolArm64.Translation
//of the next instruction to be executed (in the case that the condition
//is false, and the branch was not taken, as all basic blocks should end with
//some kind of branch).
if (CurrOp == CurrBlock.GetLastOp() && CurrBlock.Next == null)
if (isLastOp && CurrBlock.Next == null)
{
EmitStoreState();
EmitLdc_I8(CurrOp.Position + CurrOp.OpCodeSizeInBytes);
@ -285,32 +302,43 @@ namespace ChocolArm64.Translation
return;
}
_queue.Enqueue(new TranslatorQueueItem(position, mode, TranslationTier.Tier1));
_queue.Enqueue(position, mode, TranslationTier.Tier1, isComplete: true);
}
public bool TryOptEmitSubroutineCall()
{
//Calls should always have a next block, unless
//we're translating a single basic block.
if (_currBlock.Next == null)
{
return false;
}
if (CurrOp.Emitter != InstEmit.Bl)
if (!(CurrOp is IOpCodeBImm op))
{
return false;
}
if (!_cache.TryGetSubroutine(((OpCodeBImmAl64)CurrOp).Imm, out TranslatedSub subroutine))
if (!_cache.TryGetSubroutine(op.Imm, out TranslatedSub sub))
{
return false;
}
//It's not worth to call a Tier0 method, because
//it contains slow code, rather than the entire function.
if (sub.Tier == TranslationTier.Tier0)
{
return false;
}
EmitStoreState(sub);
for (int index = 0; index < TranslatedSub.FixedArgTypes.Length; index++)
{
EmitLdarg(index);
}
EmitCall(subroutine.Method);
EmitCall(sub.Method);
return true;
}
@ -321,8 +349,8 @@ namespace ChocolArm64.Translation
InstEmitAluHelper.EmitAluLoadOpers(this);
Stloc(CmpOptTmp2Index, IoType.Int);
Stloc(CmpOptTmp1Index, IoType.Int);
Stloc(CmpOptTmp2Index, VarType.Int);
Stloc(CmpOptTmp1Index, VarType.Int);
}
private Dictionary<Condition, OpCode> _branchOps = new Dictionary<Condition, OpCode>()
@ -346,8 +374,8 @@ namespace ChocolArm64.Translation
{
if (_optOpLastCompare.Emitter == InstEmit.Subs)
{
Ldloc(CmpOptTmp1Index, IoType.Int, _optOpLastCompare.RegisterSize);
Ldloc(CmpOptTmp2Index, IoType.Int, _optOpLastCompare.RegisterSize);
Ldloc(CmpOptTmp1Index, VarType.Int, _optOpLastCompare.RegisterSize);
Ldloc(CmpOptTmp2Index, VarType.Int, _optOpLastCompare.RegisterSize);
Emit(_branchOps[cond], target);
@ -369,7 +397,7 @@ namespace ChocolArm64.Translation
//Such invalid values can't be encoded on the immediate encodings.
if (_optOpLastCompare is IOpCodeAluImm64 op)
{
Ldloc(CmpOptTmp1Index, IoType.Int, _optOpLastCompare.RegisterSize);
Ldloc(CmpOptTmp1Index, VarType.Int, _optOpLastCompare.RegisterSize);
if (_optOpLastCompare.RegisterSize == RegisterSize.Int32)
{
@ -491,14 +519,14 @@ namespace ChocolArm64.Translation
{
if (amount > 0)
{
Stloc(RorTmpIndex, IoType.Int);
Ldloc(RorTmpIndex, IoType.Int);
Stloc(RorTmpIndex, VarType.Int);
Ldloc(RorTmpIndex, VarType.Int);
EmitLdc_I4(amount);
Emit(OpCodes.Shr_Un);
Ldloc(RorTmpIndex, IoType.Int);
Ldloc(RorTmpIndex, VarType.Int);
EmitLdc_I4(CurrOp.GetBitsCount() - amount);
@ -546,7 +574,7 @@ namespace ChocolArm64.Translation
public void EmitLdarg(int index)
{
_ilBlock.Add(new ILOpCodeLoad(index, IoType.Arg));
_ilBlock.Add(new ILOpCodeLoad(index, VarType.Arg));
}
public void EmitLdintzr(int index)
@ -588,6 +616,11 @@ namespace ChocolArm64.Translation
_ilBlock.Add(new ILOpCodeStoreState(_ilBlock));
}
private void EmitStoreState(TranslatedSub callSub)
{
_ilBlock.Add(new ILOpCodeStoreState(_ilBlock, callSub));
}
public void EmitLdtmp() => EmitLdint(IntGpTmp1Index);
public void EmitSttmp() => EmitStint(IntGpTmp1Index);
@ -600,13 +633,13 @@ namespace ChocolArm64.Translation
public void EmitLdvectmp2() => EmitLdvec(VecGpTmp2Index);
public void EmitStvectmp2() => EmitStvec(VecGpTmp2Index);
public void EmitLdint(int index) => Ldloc(index, IoType.Int);
public void EmitStint(int index) => Stloc(index, IoType.Int);
public void EmitLdint(int index) => Ldloc(index, VarType.Int);
public void EmitStint(int index) => Stloc(index, VarType.Int);
public void EmitLdvec(int index) => Ldloc(index, IoType.Vector);
public void EmitStvec(int index) => Stloc(index, IoType.Vector);
public void EmitLdvec(int index) => Ldloc(index, VarType.Vector);
public void EmitStvec(int index) => Stloc(index, VarType.Vector);
public void EmitLdflg(int index) => Ldloc(index, IoType.Flag);
public void EmitLdflg(int index) => Ldloc(index, VarType.Flag);
public void EmitStflg(int index)
{
//Set this only if any of the NZCV flag bits were modified.
@ -619,22 +652,22 @@ namespace ChocolArm64.Translation
_optOpLastFlagSet = CurrOp;
}
Stloc(index, IoType.Flag);
Stloc(index, VarType.Flag);
}
private void Ldloc(int index, IoType ioType)
private void Ldloc(int index, VarType varType)
{
_ilBlock.Add(new ILOpCodeLoad(index, ioType, CurrOp.RegisterSize));
_ilBlock.Add(new ILOpCodeLoad(index, varType, CurrOp.RegisterSize));
}
private void Ldloc(int index, IoType ioType, RegisterSize registerSize)
private void Ldloc(int index, VarType varType, RegisterSize registerSize)
{
_ilBlock.Add(new ILOpCodeLoad(index, ioType, registerSize));
_ilBlock.Add(new ILOpCodeLoad(index, varType, registerSize));
}
private void Stloc(int index, IoType ioType)
private void Stloc(int index, VarType varType)
{
_ilBlock.Add(new ILOpCodeStore(index, ioType, CurrOp.RegisterSize));
_ilBlock.Add(new ILOpCodeStore(index, varType, CurrOp.RegisterSize));
}
public void EmitCallPropGet(Type objType, string propName)

6
Translation/ILLabel.cs
View File

@ -6,7 +6,7 @@ namespace ChocolArm64.Translation
{
private bool _hasLabel;
private Label _lbl;
private Label _label;
public void Emit(ILMethodBuilder context)
{
@ -17,12 +17,12 @@ namespace ChocolArm64.Translation
{
if (!_hasLabel)
{
_lbl = context.Generator.DefineLabel();
_label = context.Generator.DefineLabel();
_hasLabel = true;
}
return _lbl;
return _label;
}
}
}

45
Translation/ILMethodBuilder.cs
View File

@ -8,7 +8,10 @@ namespace ChocolArm64.Translation
{
class ILMethodBuilder
{
public LocalAlloc LocalAlloc { get; private set; }
private const int RegsCount = 32;
private const int RegsMask = RegsCount - 1;
public RegisterUsage RegUsage { get; private set; }
public ILGenerator Generator { get; private set; }
@ -18,29 +21,47 @@ namespace ChocolArm64.Translation
private string _subName;
public bool IsAarch64 { get; }
public bool IsSubComplete { get; }
private int _localsCount;
public ILMethodBuilder(ILBlock[] ilBlocks, string subName)
public ILMethodBuilder(
ILBlock[] ilBlocks,
string subName,
bool isAarch64,
bool isSubComplete = false)
{
_ilBlocks = ilBlocks;
_subName = subName;
_ilBlocks = ilBlocks;
_subName = subName;
IsAarch64 = isAarch64;
IsSubComplete = isSubComplete;
}
public TranslatedSub GetSubroutine(TranslationTier tier)
public TranslatedSub GetSubroutine(TranslationTier tier, bool isWorthOptimizing)
{
LocalAlloc = new LocalAlloc(_ilBlocks, _ilBlocks[0]);
RegUsage = new RegisterUsage();
RegUsage.BuildUses(_ilBlocks[0]);
DynamicMethod method = new DynamicMethod(_subName, typeof(long), TranslatedSub.FixedArgTypes);
Generator = method.GetILGenerator();
long intNiRegsMask = RegUsage.GetIntNotInputs(_ilBlocks[0]);
long vecNiRegsMask = RegUsage.GetVecNotInputs(_ilBlocks[0]);
TranslatedSub subroutine = new TranslatedSub(method, tier);
TranslatedSub subroutine = new TranslatedSub(
method,
intNiRegsMask,
vecNiRegsMask,
tier,
isWorthOptimizing);
_locals = new Dictionary<Register, int>();
_localsCount = 0;
new ILOpCodeLoadState(_ilBlocks[0]).Emit(this);
Generator = method.GetILGenerator();
foreach (ILBlock ilBlock in _ilBlocks)
{
@ -80,13 +101,13 @@ namespace ChocolArm64.Translation
public static Register GetRegFromBit(int bit, RegisterType baseType)
{
if (bit < 32)
if (bit < RegsCount)
{
return new Register(bit, baseType);
}
else if (baseType == RegisterType.Int)
{
return new Register(bit & 0x1f, RegisterType.Flag);
return new Register(bit & RegsMask, RegisterType.Flag);
}
else
{
@ -96,7 +117,7 @@ namespace ChocolArm64.Translation
public static bool IsRegIndex(int index)
{
return (uint)index < 32;
return (uint)index < RegsCount;
}
}
}

6
Translation/ILOpCode.cs
View File

@ -4,16 +4,16 @@ namespace ChocolArm64.Translation
{
struct ILOpCode : IILEmit
{
private OpCode _ilOp;
public OpCode ILOp { get; }
public ILOpCode(OpCode ilOp)
{
_ilOp = ilOp;
ILOp = ilOp;
}
public void Emit(ILMethodBuilder context)
{
context.Generator.Emit(_ilOp);
context.Generator.Emit(ILOp);
}
}
}

10
Translation/ILOpCodeBranch.cs
View File

@ -4,18 +4,18 @@ namespace ChocolArm64.Translation
{
struct ILOpCodeBranch : IILEmit
{
private OpCode _ilOp;
private ILLabel _label;
public OpCode ILOp { get; }
public ILLabel Label { get; }
public ILOpCodeBranch(OpCode ilOp, ILLabel label)
{
_ilOp = ilOp;
_label = label;
ILOp = ilOp;
Label = label;
}
public void Emit(ILMethodBuilder context)
{
context.Generator.Emit(_ilOp, _label.GetLabel(context));
context.Generator.Emit(ILOp, Label.GetLabel(context));
}
}
}

4
Translation/ILOpCodeCall.cs
View File

@ -5,9 +5,9 @@ namespace ChocolArm64.Translation
{
struct ILOpCodeCall : IILEmit
{
public MethodInfo Info { get; private set; }
public MethodInfo Info { get; }
public bool IsVirtual { get; private set; }
public bool IsVirtual { get; }
public ILOpCodeCall(MethodInfo info, bool isVirtual)
{

2
Translation/ILOpCodeConst.cs
View File

@ -16,6 +16,8 @@ namespace ChocolArm64.Translation
private ImmVal _value;
public long Value => _value.I8;
private enum ConstType
{
Int32,

20
Translation/ILOpCodeLoad.cs
View File

@ -5,28 +5,28 @@ namespace ChocolArm64.Translation
{
struct ILOpCodeLoad : IILEmit
{
public int Index { get; private set; }
public int Index { get; }
public IoType IoType { get; private set; }
public VarType VarType { get; }
public RegisterSize RegisterSize { get; private set; }
public RegisterSize RegisterSize { get; }
public ILOpCodeLoad(int index, IoType ioType, RegisterSize registerSize = 0)
public ILOpCodeLoad(int index, VarType varType, RegisterSize registerSize = 0)
{
Index = index;
IoType = ioType;
VarType = varType;
RegisterSize = registerSize;
}
public void Emit(ILMethodBuilder context)
{
switch (IoType)
switch (VarType)
{
case IoType.Arg: context.Generator.EmitLdarg(Index); break;
case VarType.Arg: context.Generator.EmitLdarg(Index); break;
case IoType.Flag: EmitLdloc(context, Index, RegisterType.Flag); break;
case IoType.Int: EmitLdloc(context, Index, RegisterType.Int); break;
case IoType.Vector: EmitLdloc(context, Index, RegisterType.Vector); break;
case VarType.Flag: EmitLdloc(context, Index, RegisterType.Flag); break;
case VarType.Int: EmitLdloc(context, Index, RegisterType.Int); break;
case VarType.Vector: EmitLdloc(context, Index, RegisterType.Vector); break;
}
}

2
Translation/ILOpCodeLoadField.cs
View File

@ -5,7 +5,7 @@ namespace ChocolArm64.Translation
{
struct ILOpCodeLoadField : IILEmit
{
public FieldInfo Info { get; private set; }
public FieldInfo Info { get; }
public ILOpCodeLoadField(FieldInfo info)
{

17
Translation/ILOpCodeLoadState.cs
View File

@ -7,15 +7,24 @@ namespace ChocolArm64.Translation
{
private ILBlock _block;
public ILOpCodeLoadState(ILBlock block)
private bool _isSubEntry;
public ILOpCodeLoadState(ILBlock block, bool isSubEntry = false)
{
_block = block;
_block = block;
_isSubEntry = isSubEntry;
}
public void Emit(ILMethodBuilder context)
{
long intInputs = context.LocalAlloc.GetIntInputs(_block);
long vecInputs = context.LocalAlloc.GetVecInputs(_block);
long intInputs = context.RegUsage.GetIntInputs(_block);
long vecInputs = context.RegUsage.GetVecInputs(_block);
if (Optimizations.AssumeStrictAbiCompliance && context.IsSubComplete)
{
intInputs = RegisterUsage.ClearCallerSavedIntRegs(intInputs, context.IsAarch64);
vecInputs = RegisterUsage.ClearCallerSavedVecRegs(vecInputs, context.IsAarch64);
}
LoadLocals(context, intInputs, RegisterType.Int);
LoadLocals(context, vecInputs, RegisterType.Vector);

6
Translation/ILOpCodeLog.cs
View File

@ -2,16 +2,16 @@ namespace ChocolArm64.Translation
{
struct ILOpCodeLog : IILEmit
{
private string _text;
public string Text { get; }
public ILOpCodeLog(string text)
{
_text = text;
Text = text;
}
public void Emit(ILMethodBuilder context)
{
context.Generator.EmitWriteLine(_text);
context.Generator.EmitWriteLine(Text);
}
}
}

20
Translation/ILOpCodeStore.cs
View File

@ -5,28 +5,28 @@ namespace ChocolArm64.Translation
{
struct ILOpCodeStore : IILEmit
{
public int Index { get; private set; }
public int Index { get; }
public IoType IoType { get; private set; }
public VarType VarType { get; }
public RegisterSize RegisterSize { get; private set; }
public RegisterSize RegisterSize { get; }
public ILOpCodeStore(int index, IoType ioType, RegisterSize registerSize = 0)
public ILOpCodeStore(int index, VarType varType, RegisterSize registerSize = 0)
{
Index = index;
IoType = ioType;
VarType = varType;
RegisterSize = registerSize;
}
public void Emit(ILMethodBuilder context)
{
switch (IoType)
switch (VarType)
{
case IoType.Arg: context.Generator.EmitStarg(Index); break;
case VarType.Arg: context.Generator.EmitStarg(Index); break;
case IoType.Flag: EmitStloc(context, Index, RegisterType.Flag); break;
case IoType.Int: EmitStloc(context, Index, RegisterType.Int); break;
case IoType.Vector: EmitStloc(context, Index, RegisterType.Vector); break;
case VarType.Flag: EmitStloc(context, Index, RegisterType.Flag); break;
case VarType.Int: EmitStloc(context, Index, RegisterType.Int); break;
case VarType.Vector: EmitStloc(context, Index, RegisterType.Vector); break;
}
}

26
Translation/ILOpCodeStoreState.cs
View File

@ -7,15 +7,33 @@ namespace ChocolArm64.Translation
{
private ILBlock _block;
public ILOpCodeStoreState(ILBlock block)
private TranslatedSub _callSub;
public ILOpCodeStoreState(ILBlock block, TranslatedSub callSub = null)
{
_block = block;
_block = block;
_callSub = callSub;
}
public void Emit(ILMethodBuilder context)
{
long intOutputs = context.LocalAlloc.GetIntOutputs(_block);
long vecOutputs = context.LocalAlloc.GetVecOutputs(_block);
long intOutputs = context.RegUsage.GetIntOutputs(_block);
long vecOutputs = context.RegUsage.GetVecOutputs(_block);
if (Optimizations.AssumeStrictAbiCompliance && context.IsSubComplete)
{
intOutputs = RegisterUsage.ClearCallerSavedIntRegs(intOutputs, context.IsAarch64);
vecOutputs = RegisterUsage.ClearCallerSavedVecRegs(vecOutputs, context.IsAarch64);
}
if (_callSub != null)
{
//Those register are assigned on the callee function, without
//reading it's value first. We don't need to write them because
//they are not going to be read on the callee.
intOutputs &= ~_callSub.IntNiRegsMask;
vecOutputs &= ~_callSub.VecNiRegsMask;
}
StoreLocals(context, intOutputs, RegisterType.Int);
StoreLocals(context, vecOutputs, RegisterType.Vector);

199
Translation/LocalAlloc.cs → Translation/RegisterUsage.cs
View File

@ -3,8 +3,13 @@ using System.Collections.Generic;
namespace ChocolArm64.Translation
{
class LocalAlloc
class RegisterUsage
{
public const long CallerSavedIntRegistersMask = 0x7fL << 9;
public const long PStateNzcvFlagsMask = 0xfL << 60;
public const long CallerSavedVecRegistersMask = 0xffffL << 16;
private class PathIo
{
private Dictionary<ILBlock, long> _allInputs;
@ -18,31 +23,30 @@ namespace ChocolArm64.Translation
_cmnOutputs = new Dictionary<ILBlock, long>();
}
public PathIo(ILBlock root, long inputs, long outputs) : this()
public void Set(ILBlock entry, long inputs, long outputs)
{
Set(root, inputs, outputs);
}
public void Set(ILBlock root, long inputs, long outputs)
{
if (!_allInputs.TryAdd(root, inputs))
if (!_allInputs.TryAdd(entry, inputs))
{
_allInputs[root] |= inputs;
_allInputs[entry] |= inputs;
}
if (!_cmnOutputs.TryAdd(root, outputs))
if (!_cmnOutputs.TryAdd(entry, outputs))
{
_cmnOutputs[root] &= outputs;
_cmnOutputs[entry] &= outputs;
}
_allOutputs |= outputs;
}
public long GetInputs(ILBlock root)
public long GetInputs(ILBlock entry)
{
if (_allInputs.TryGetValue(root, out long inputs))
if (_allInputs.TryGetValue(entry, out long inputs))
{
return inputs | (_allOutputs & ~_cmnOutputs[root]);
//We also need to read the registers that may not be written
//by all paths that can reach a exit point, to ensure that
//the local variable will not remain uninitialized depending
//on the flow path taken.
return inputs | (_allOutputs & ~_cmnOutputs[entry]);
}
return 0;
@ -57,15 +61,38 @@ namespace ChocolArm64.Translation
private Dictionary<ILBlock, PathIo> _intPaths;
private Dictionary<ILBlock, PathIo> _vecPaths;
private struct BlockIo
private struct BlockIo : IEquatable<BlockIo>
{
public ILBlock Block;
public ILBlock Entry;
public ILBlock Block { get; }
public ILBlock Entry { get; }
public long IntInputs;
public long VecInputs;
public long IntOutputs;
public long VecOutputs;
public long IntInputs { get; set; }
public long VecInputs { get; set; }
public long IntOutputs { get; set; }
public long VecOutputs { get; set; }
public BlockIo(ILBlock block, ILBlock entry)
{
Block = block;
Entry = entry;
IntInputs = IntOutputs = 0;
VecInputs = VecOutputs = 0;
}
public BlockIo(
ILBlock block,
ILBlock entry,
long intInputs,
long vecInputs,
long intOutputs,
long vecOutputs) : this(block, entry)
{
IntInputs = intInputs;
VecInputs = vecInputs;
IntOutputs = intOutputs;
VecOutputs = vecOutputs;
}
public override bool Equals(object obj)
{
@ -74,6 +101,11 @@ namespace ChocolArm64.Translation
return false;
}
return Equals(other);
}
public bool Equals(BlockIo other)
{
return other.Block == Block &&
other.Entry == Entry &&
other.IntInputs == IntInputs &&
@ -98,25 +130,13 @@ namespace ChocolArm64.Translation
}
}
private const int MaxOptGraphLength = 40;
public LocalAlloc(ILBlock[] graph, ILBlock entry)
public RegisterUsage()
{
_intPaths = new Dictionary<ILBlock, PathIo>();
_vecPaths = new Dictionary<ILBlock, PathIo>();
if (graph.Length > 1 &&
graph.Length < MaxOptGraphLength)
{
InitializeOptimal(graph, entry);
}
else
{
InitializeFast(graph);
}
}
private void InitializeOptimal(ILBlock[] graph, ILBlock entry)
public void BuildUses(ILBlock entry)
{
//This will go through all possible paths on the graph,
//and store all inputs/outputs for each block. A register
@ -124,7 +144,7 @@ namespace ChocolArm64.Translation
//When a block can be reached by more than one path, then the
//output from all paths needs to be set for this block, and
//only outputs present in all of the parent blocks can be considered
//when doing input elimination. Each block chain have a entry, that's where
//when doing input elimination. Each block chain has a entry, that's where
//the code starts executing. They are present on the subroutine start point,
//and on call return points too (address written to X30 by BL).
HashSet<BlockIo> visited = new HashSet<BlockIo>();
@ -133,19 +153,13 @@ namespace ChocolArm64.Translation
void Enqueue(BlockIo block)
{
if (!visited.Contains(block))
if (visited.Add(block))
{
unvisited.Enqueue(block);
visited.Add(block);
}
}
Enqueue(new BlockIo()
{
Block = entry,
Entry = entry
});
Enqueue(new BlockIo(entry, entry));
while (unvisited.Count > 0)
{
@ -177,19 +191,21 @@ namespace ChocolArm64.Translation
void EnqueueFromCurrent(ILBlock block, bool retTarget)
{
BlockIo blockIo = new BlockIo() { Block = block };
BlockIo blockIo;
if (retTarget)
{
blockIo.Entry = block;
blockIo = new BlockIo(block, block);
}
else
{
blockIo.Entry = current.Entry;
blockIo.IntInputs = current.IntInputs;
blockIo.VecInputs = current.VecInputs;
blockIo.IntOutputs = current.IntOutputs;
blockIo.VecOutputs = current.VecOutputs;
blockIo = new BlockIo(
block,
current.Entry,
current.IntInputs,
current.VecInputs,
current.IntOutputs,
current.VecOutputs);
}
Enqueue(blockIo);
@ -207,54 +223,63 @@ namespace ChocolArm64.Translation
}
}
private void InitializeFast(ILBlock[] graph)
{
//This is WAY faster than InitializeOptimal, but results in
//unneeded loads and stores, so the resulting code will be slower.
long intInputs = 0, intOutputs = 0;
long vecInputs = 0, vecOutputs = 0;
public long GetIntInputs(ILBlock entry) => GetInputsImpl(entry, _intPaths.Values);
public long GetVecInputs(ILBlock entry) => GetInputsImpl(entry, _vecPaths.Values);
foreach (ILBlock block in graph)
{
intInputs |= block.IntInputs;
intOutputs |= block.IntOutputs;
vecInputs |= block.VecInputs;
vecOutputs |= block.VecOutputs;
}
//It's possible that not all code paths writes to those output registers,
//in those cases if we attempt to write an output registers that was
//not written, we will be just writing zero and messing up the old register value.
//So we just need to ensure that all outputs are loaded.
if (graph.Length > 1)
{
intInputs |= intOutputs;
vecInputs |= vecOutputs;
}
foreach (ILBlock block in graph)
{
_intPaths.Add(block, new PathIo(block, intInputs, intOutputs));
_vecPaths.Add(block, new PathIo(block, vecInputs, vecOutputs));
}
}
public long GetIntInputs(ILBlock root) => GetInputsImpl(root, _intPaths.Values);
public long GetVecInputs(ILBlock root) => GetInputsImpl(root, _vecPaths.Values);
private long GetInputsImpl(ILBlock root, IEnumerable<PathIo> values)
private long GetInputsImpl(ILBlock entry, IEnumerable<PathIo> values)
{
long inputs = 0;
foreach (PathIo path in values)
{
inputs |= path.GetInputs(root);
inputs |= path.GetInputs(entry);
}
return inputs;
}
public long GetIntNotInputs(ILBlock entry) => GetNotInputsImpl(entry, _intPaths.Values);
public long GetVecNotInputs(ILBlock entry) => GetNotInputsImpl(entry, _vecPaths.Values);
private long GetNotInputsImpl(ILBlock entry, IEnumerable<PathIo> values)
{
//Returns a mask with registers that are written to
//before being read. Only those registers that are
//written in all paths, and is not read before being
//written to on those paths, should be set on the mask.
long mask = -1L;
foreach (PathIo path in values)
{
mask &= path.GetOutputs() & ~path.GetInputs(entry);
}
return mask;
}
public long GetIntOutputs(ILBlock block) => _intPaths[block].GetOutputs();
public long GetVecOutputs(ILBlock block) => _vecPaths[block].GetOutputs();
public static long ClearCallerSavedIntRegs(long mask, bool isAarch64)
{
//TODO: ARM32 support.
if (isAarch64)
{
mask &= ~(CallerSavedIntRegistersMask | PStateNzcvFlagsMask);
}
return mask;
}
public static long ClearCallerSavedVecRegs(long mask, bool isAarch64)
{
//TODO: ARM32 support.
if (isAarch64)
{
mask &= ~CallerSavedVecRegistersMask;
}
return mask;
}
}
}

55
Translation/TranslatedSub.cs
View File

@ -10,21 +10,41 @@ namespace ChocolArm64.Translation
class TranslatedSub
{
//This is the minimum amount of calls needed for the method
//to be retranslated with higher quality code. It's only worth
//doing that for hot code.
private const int MinCallCountForOpt = 30;
public ArmSubroutine Delegate { get; private set; }
public static int StateArgIdx { get; private set; }
public static int MemoryArgIdx { get; private set; }
public static int StateArgIdx { get; }
public static int MemoryArgIdx { get; }
public static Type[] FixedArgTypes { get; private set; }
public static Type[] FixedArgTypes { get; }
public DynamicMethod Method { get; private set; }
public DynamicMethod Method { get; }
public TranslationTier Tier { get; private set; }
public TranslationTier Tier { get; }
public TranslatedSub(DynamicMethod method, TranslationTier tier)
public long IntNiRegsMask { get; }
public long VecNiRegsMask { get; }
private bool _isWorthOptimizing;
private int _callCount;
public TranslatedSub(
DynamicMethod method,
long intNiRegsMask,
long vecNiRegsMask,
TranslationTier tier,
bool isWorthOptimizing)
{
Method = method ?? throw new ArgumentNullException(nameof(method));;
Tier = tier;
Method = method ?? throw new ArgumentNullException(nameof(method));;
IntNiRegsMask = intNiRegsMask;
VecNiRegsMask = vecNiRegsMask;
_isWorthOptimizing = isWorthOptimizing;
Tier = tier;
}
static TranslatedSub()
@ -61,5 +81,24 @@ namespace ChocolArm64.Translation
{
return Delegate(threadState, memory);
}
public bool IsWorthOptimizing()
{
if (!_isWorthOptimizing)
{
return false;
}
if (_callCount++ < MinCallCountForOpt)
{
return false;
}
//Only return true once, so that it is
//added to the queue only once.
_isWorthOptimizing = false;
return true;
}
}
}

56
Translation/Translator.cs
View File

@ -63,48 +63,36 @@ namespace ChocolArm64.Translation
CpuTrace?.Invoke(this, new CpuTraceEventArgs(position));
}
TranslatedSub subroutine = GetOrTranslateSubroutine(state, position);
if (!_cache.TryGetSubroutine(position, out TranslatedSub sub))
{
sub = TranslateLowCq(position, state.GetExecutionMode());
}
position = subroutine.Execute(state, _memory);
position = sub.Execute(state, _memory);
}
while (position != 0 && state.Running);
state.CurrentTranslator = null;
}
internal void TranslateVirtualSubroutine(CpuThreadState state, long position)
{
if (!_cache.TryGetSubroutine(position, out TranslatedSub sub) || sub.Tier == TranslationTier.Tier0)
{
_queue.Enqueue(new TranslatorQueueItem(position, state.GetExecutionMode(), TranslationTier.Tier1));
}
}
internal ArmSubroutine GetOrTranslateVirtualSubroutine(CpuThreadState state, long position)
internal ArmSubroutine GetOrTranslateSubroutine(CpuThreadState state, long position, CallType cs)
{
if (!_cache.TryGetSubroutine(position, out TranslatedSub sub))
{
sub = TranslateLowCq(position, state.GetExecutionMode());
}
if (sub.Tier == TranslationTier.Tier0)
if (sub.IsWorthOptimizing())
{
_queue.Enqueue(new TranslatorQueueItem(position, state.GetExecutionMode(), TranslationTier.Tier1));
bool isComplete = cs == CallType.Call ||
cs == CallType.VirtualCall;
_queue.Enqueue(position, state.GetExecutionMode(), TranslationTier.Tier1, isComplete);
}
return sub.Delegate;
}
internal TranslatedSub GetOrTranslateSubroutine(CpuThreadState state, long position)
{
if (!_cache.TryGetSubroutine(position, out TranslatedSub subroutine))
{
subroutine = TranslateLowCq(position, state.GetExecutionMode());
}
return subroutine;
}
private void TranslateQueuedSubs()
{
while (_threadCount != 0)
@ -124,7 +112,7 @@ namespace ChocolArm64.Translation
}
else
{
TranslateHighCq(item.Position, item.Mode);
TranslateHighCq(item.Position, item.Mode, item.IsComplete);
}
}
else
@ -142,14 +130,16 @@ namespace ChocolArm64.Translation
string subName = GetSubroutineName(position);
ILMethodBuilder ilMthdBuilder = new ILMethodBuilder(context.GetILBlocks(), subName);
bool isAarch64 = mode == ExecutionMode.Aarch64;
TranslatedSub subroutine = ilMthdBuilder.GetSubroutine(TranslationTier.Tier0);
ILMethodBuilder ilMthdBuilder = new ILMethodBuilder(context.GetILBlocks(), subName, isAarch64);
TranslatedSub subroutine = ilMthdBuilder.GetSubroutine(TranslationTier.Tier0, isWorthOptimizing: true);
return _cache.GetOrAdd(position, subroutine, block.OpCodes.Count);
}
private void TranslateHighCq(long position, ExecutionMode mode)
private TranslatedSub TranslateHighCq(long position, ExecutionMode mode, bool isComplete)
{
Block graph = Decoder.DecodeSubroutine(_memory, position, mode);
@ -159,9 +149,13 @@ namespace ChocolArm64.Translation
string subName = GetSubroutineName(position);
ILMethodBuilder ilMthdBuilder = new ILMethodBuilder(ilBlocks, subName);
bool isAarch64 = mode == ExecutionMode.Aarch64;
TranslatedSub subroutine = ilMthdBuilder.GetSubroutine(TranslationTier.Tier1);
isComplete &= !context.HasIndirectJump;
ILMethodBuilder ilMthdBuilder = new ILMethodBuilder(ilBlocks, subName, isAarch64, isComplete);
TranslatedSub subroutine = ilMthdBuilder.GetSubroutine(TranslationTier.Tier1, context.HasSlowCall);
int ilOpCount = 0;
@ -170,9 +164,11 @@ namespace ChocolArm64.Translation
ilOpCount += ilBlock.Count;
}
ForceAheadOfTimeCompilation(subroutine);
_cache.AddOrUpdate(position, subroutine, ilOpCount);
ForceAheadOfTimeCompilation(subroutine);
return subroutine;
}
private string GetSubroutineName(long position)

14
Translation/TranslatorQueue.cs
View File

@ -1,3 +1,4 @@
using ChocolArm64.State;
using System.Collections.Concurrent;
using System.Threading;
@ -5,10 +6,6 @@ namespace ChocolArm64.Translation
{
class TranslatorQueue
{
//This is the maximum number of functions to be translated that the queue can hold.
//The value may need some tuning to find the sweet spot.
private const int MaxQueueSize = 1024;
private ConcurrentStack<TranslatorQueueItem>[] _translationQueue;
private ManualResetEvent _queueDataReceivedEvent;
@ -27,14 +24,11 @@ namespace ChocolArm64.Translation
_queueDataReceivedEvent = new ManualResetEvent(false);
}
public void Enqueue(TranslatorQueueItem item)
public void Enqueue(long position, ExecutionMode mode, TranslationTier tier, bool isComplete)
{
ConcurrentStack<TranslatorQueueItem> queue = _translationQueue[(int)item.Tier];
TranslatorQueueItem item = new TranslatorQueueItem(position, mode, tier, isComplete);
if (queue.Count >= MaxQueueSize)
{
queue.TryPop(out _);
}
ConcurrentStack<TranslatorQueueItem> queue = _translationQueue[(int)tier];
queue.Push(item);

15
Translation/TranslatorQueueItem.cs
View File

@ -10,11 +10,18 @@ namespace ChocolArm64.Translation
public TranslationTier Tier { get; }
public TranslatorQueueItem(long position, ExecutionMode mode, TranslationTier tier)
public bool IsComplete { get; }
public TranslatorQueueItem(
long position,
ExecutionMode mode,
TranslationTier tier,
bool isComplete = false)
{
Position = position;
Mode = mode;
Tier = tier;
Position = position;
Mode = mode;
Tier = tier;
IsComplete = isComplete;
}
}
}

2
Translation/IoType.cs → Translation/VarType.cs
View File

@ -1,6 +1,6 @@
namespace ChocolArm64.Translation
{
enum IoType
enum VarType
{
Arg,
Flag,