Ryujinx/ChocolArm64/Translation/AILEmitterCtx.cs

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using ChocolArm64.Decoder;
using ChocolArm64.Instruction;
using ChocolArm64.State;
using System;
using System.Collections.Generic;
using System.Reflection;
using System.Reflection.Emit;
namespace ChocolArm64.Translation
{
class AILEmitterCtx
{
private ATranslator Translator;
private HashSet<long> Callees;
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private Dictionary<long, AILLabel> Labels;
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private int BlkIndex;
private int OpcIndex;
private ABlock[] Graph;
private ABlock Root;
public ABlock CurrBlock => Graph[BlkIndex];
public AOpCode CurrOp => Graph[BlkIndex].OpCodes[OpcIndex];
private AILEmitter Emitter;
private AILBlock ILBlock;
private AOpCode OptOpLastCompare;
private AOpCode OptOpLastFlagSet;
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//This is the index of the temporary register, used to store temporary
//values needed by some functions, since IL doesn't have a swap instruction.
//You can use any value here as long it doesn't conflict with the indices
//for the other registers. Any value >= 64 or < 0 will do.
private const int Tmp1Index = -1;
private const int Tmp2Index = -2;
private const int Tmp3Index = -3;
private const int Tmp4Index = -4;
private const int Tmp5Index = -5;
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public AILEmitterCtx(
ATranslator Translator,
ABlock[] Graph,
ABlock Root,
string SubName)
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{
if (Translator == null)
{
throw new ArgumentNullException(nameof(Translator));
}
if (Graph == null)
{
throw new ArgumentNullException(nameof(Graph));
}
if (Root == null)
{
throw new ArgumentNullException(nameof(Root));
}
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this.Translator = Translator;
this.Graph = Graph;
this.Root = Root;
Callees = new HashSet<long>();
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Labels = new Dictionary<long, AILLabel>();
Emitter = new AILEmitter(Graph, Root, SubName);
ILBlock = Emitter.GetILBlock(0);
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OpcIndex = -1;
if (Graph.Length == 0 || !AdvanceOpCode())
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{
throw new ArgumentException(nameof(Graph));
}
}
public ATranslatedSub GetSubroutine()
{
return Emitter.GetSubroutine(Callees);
}
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public bool AdvanceOpCode()
{
if (OpcIndex + 1 == CurrBlock.OpCodes.Count &&
BlkIndex + 1 == Graph.Length)
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{
return false;
}
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while (++OpcIndex >= (CurrBlock?.OpCodes.Count ?? 0))
{
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BlkIndex++;
OpcIndex = -1;
OptOpLastFlagSet = null;
OptOpLastCompare = null;
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ILBlock = Emitter.GetILBlock(BlkIndex);
}
return true;
}
public void EmitOpCode()
{
if (OpcIndex == 0)
{
MarkLabel(GetLabel(CurrBlock.Position));
}
CurrOp.Emitter(this);
ILBlock.Add(new AILBarrier());
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}
public bool TryOptEmitSubroutineCall()
{
Callees.Add(((AOpCodeBImm)CurrOp).Imm);
if (CurrBlock.Next == null)
{
return false;
}
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if (!Translator.TryGetCachedSub(CurrOp, out ATranslatedSub Sub))
{
return false;
}
for (int Index = 0; Index < ATranslatedSub.FixedArgTypes.Length; Index++)
{
EmitLdarg(Index);
}
foreach (ARegister Reg in Sub.Params)
{
switch (Reg.Type)
{
case ARegisterType.Flag: Ldloc(Reg.Index, AIoType.Flag); break;
case ARegisterType.Int: Ldloc(Reg.Index, AIoType.Int); break;
case ARegisterType.Vector: Ldloc(Reg.Index, AIoType.Vector); break;
}
}
EmitCall(Sub.Method);
return true;
}
public void TryOptMarkCondWithoutCmp()
{
OptOpLastCompare = CurrOp;
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AInstEmitAluHelper.EmitDataLoadOpers(this);
Stloc(Tmp4Index, AIoType.Int);
Stloc(Tmp3Index, AIoType.Int);
}
private Dictionary<ACond, OpCode> BranchOps = new Dictionary<ACond, OpCode>()
{
{ ACond.Eq, OpCodes.Beq },
{ ACond.Ne, OpCodes.Bne_Un },
{ ACond.Ge_Un, OpCodes.Bge_Un },
{ ACond.Lt_Un, OpCodes.Blt_Un },
{ ACond.Gt_Un, OpCodes.Bgt_Un },
{ ACond.Le_Un, OpCodes.Ble_Un },
{ ACond.Ge, OpCodes.Bge },
{ ACond.Lt, OpCodes.Blt },
{ ACond.Gt, OpCodes.Bgt },
{ ACond.Le, OpCodes.Ble }
};
public void EmitCondBranch(AILLabel Target, ACond Cond)
{
OpCode ILOp;
int IntCond = (int)Cond;
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if (OptOpLastCompare != null &&
OptOpLastCompare == OptOpLastFlagSet && BranchOps.ContainsKey(Cond))
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{
Ldloc(Tmp3Index, AIoType.Int, OptOpLastCompare.RegisterSize);
Ldloc(Tmp4Index, AIoType.Int, OptOpLastCompare.RegisterSize);
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if (OptOpLastCompare.Emitter == AInstEmit.Adds)
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{
Emit(OpCodes.Neg);
}
ILOp = BranchOps[Cond];
}
else if (IntCond < 14)
{
int CondTrue = IntCond >> 1;
switch (CondTrue)
{
case 0: EmitLdflg((int)APState.ZBit); break;
case 1: EmitLdflg((int)APState.CBit); break;
case 2: EmitLdflg((int)APState.NBit); break;
case 3: EmitLdflg((int)APState.VBit); break;
case 4:
EmitLdflg((int)APState.CBit);
EmitLdflg((int)APState.ZBit);
Emit(OpCodes.Not);
Emit(OpCodes.And);
break;
case 5:
case 6:
EmitLdflg((int)APState.NBit);
EmitLdflg((int)APState.VBit);
Emit(OpCodes.Ceq);
if (CondTrue == 6)
{
EmitLdflg((int)APState.ZBit);
Emit(OpCodes.Not);
Emit(OpCodes.And);
}
break;
}
ILOp = (IntCond & 1) != 0
? OpCodes.Brfalse
: OpCodes.Brtrue;
}
else
{
ILOp = OpCodes.Br;
}
Emit(ILOp, Target);
}
public void EmitCast(AIntType IntType)
{
switch (IntType)
{
case AIntType.UInt8: Emit(OpCodes.Conv_U1); break;
case AIntType.UInt16: Emit(OpCodes.Conv_U2); break;
case AIntType.UInt32: Emit(OpCodes.Conv_U4); break;
case AIntType.UInt64: Emit(OpCodes.Conv_U8); break;
case AIntType.Int8: Emit(OpCodes.Conv_I1); break;
case AIntType.Int16: Emit(OpCodes.Conv_I2); break;
case AIntType.Int32: Emit(OpCodes.Conv_I4); break;
case AIntType.Int64: Emit(OpCodes.Conv_I8); break;
}
bool Sz64 = CurrOp.RegisterSize != ARegisterSize.Int32;
if (Sz64 == (IntType == AIntType.UInt64 ||
IntType == AIntType.Int64))
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{
return;
}
if (Sz64)
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{
Emit(IntType >= AIntType.Int8
? OpCodes.Conv_I8
: OpCodes.Conv_U8);
}
else
{
Emit(OpCodes.Conv_U4);
}
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}
public void EmitLsl(int Amount) => EmitILShift(Amount, OpCodes.Shl);
public void EmitLsr(int Amount) => EmitILShift(Amount, OpCodes.Shr_Un);
public void EmitAsr(int Amount) => EmitILShift(Amount, OpCodes.Shr);
private void EmitILShift(int Amount, OpCode ILOp)
{
if (Amount > 0)
{
EmitLdc_I4(Amount);
Emit(ILOp);
}
}
public void EmitRor(int Amount)
{
if (Amount > 0)
{
Stloc(Tmp2Index, AIoType.Int);
Ldloc(Tmp2Index, AIoType.Int);
EmitLdc_I4(Amount);
Emit(OpCodes.Shr_Un);
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Ldloc(Tmp2Index, AIoType.Int);
EmitLdc_I4(CurrOp.GetBitsCount() - Amount);
Emit(OpCodes.Shl);
Emit(OpCodes.Or);
}
}
public AILLabel GetLabel(long Position)
{
if (!Labels.TryGetValue(Position, out AILLabel Output))
{
Output = new AILLabel();
Labels.Add(Position, Output);
}
return Output;
}
public void MarkLabel(AILLabel Label)
{
ILBlock.Add(Label);
}
public void Emit(OpCode ILOp)
{
ILBlock.Add(new AILOpCode(ILOp));
}
public void Emit(OpCode ILOp, AILLabel Label)
{
ILBlock.Add(new AILOpCodeBranch(ILOp, Label));
}
public void Emit(string Text)
{
ILBlock.Add(new AILOpCodeLog(Text));
}
public void EmitLdarg(int Index)
{
ILBlock.Add(new AILOpCodeLoad(Index, AIoType.Arg));
}
public void EmitLdintzr(int Index)
{
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if (Index != AThreadState.ZRIndex)
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{
EmitLdint(Index);
}
else
{
EmitLdc_I(0);
}
}
public void EmitStintzr(int Index)
{
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if (Index != AThreadState.ZRIndex)
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{
EmitStint(Index);
}
else
{
Emit(OpCodes.Pop);
}
}
public void EmitLoadState(ABlock RetBlk)
{
ILBlock.Add(new AILOpCodeLoad(Array.IndexOf(Graph, RetBlk), AIoType.Fields));
}
public void EmitStoreState()
{
ILBlock.Add(new AILOpCodeStore(Array.IndexOf(Graph, CurrBlock), AIoType.Fields));
}
public void EmitLdtmp() => EmitLdint(Tmp1Index);
public void EmitSttmp() => EmitStint(Tmp1Index);
public void EmitLdvectmp() => EmitLdvec(Tmp5Index);
public void EmitStvectmp() => EmitStvec(Tmp5Index);
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public void EmitLdint(int Index) => Ldloc(Index, AIoType.Int);
public void EmitStint(int Index) => Stloc(Index, AIoType.Int);
public void EmitLdvec(int Index) => Ldloc(Index, AIoType.Vector);
public void EmitStvec(int Index) => Stloc(Index, AIoType.Vector);
public void EmitLdflg(int Index) => Ldloc(Index, AIoType.Flag);
public void EmitStflg(int Index)
{
OptOpLastFlagSet = CurrOp;
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Stloc(Index, AIoType.Flag);
}
private void Ldloc(int Index, AIoType IoType)
{
ILBlock.Add(new AILOpCodeLoad(Index, IoType, CurrOp.RegisterSize));
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}
private void Ldloc(int Index, AIoType IoType, ARegisterSize RegisterSize)
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{
ILBlock.Add(new AILOpCodeLoad(Index, IoType, RegisterSize));
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}
private void Stloc(int Index, AIoType IoType)
{
ILBlock.Add(new AILOpCodeStore(Index, IoType, CurrOp.RegisterSize));
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}
public void EmitCallPropGet(Type ObjType, string PropName)
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{
if (ObjType == null)
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{
throw new ArgumentNullException(nameof(ObjType));
}
if (PropName == null)
{
throw new ArgumentNullException(nameof(PropName));
}
EmitCall(ObjType.GetMethod($"get_{PropName}"));
}
public void EmitCallPropSet(Type ObjType, string PropName)
{
if (ObjType == null)
{
throw new ArgumentNullException(nameof(ObjType));
}
if (PropName == null)
{
throw new ArgumentNullException(nameof(PropName));
}
EmitCall(ObjType.GetMethod($"set_{PropName}"));
}
public void EmitCall(Type ObjType, string MthdName)
{
if (ObjType == null)
{
throw new ArgumentNullException(nameof(ObjType));
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}
if (MthdName == null)
{
throw new ArgumentNullException(nameof(MthdName));
}
EmitCall(ObjType.GetMethod(MthdName));
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}
public void EmitCall(MethodInfo MthdInfo)
{
if (MthdInfo == null)
{
throw new ArgumentNullException(nameof(MthdInfo));
}
ILBlock.Add(new AILOpCodeCall(MthdInfo));
}
public void EmitLdc_I(long Value)
{
if (CurrOp.RegisterSize == ARegisterSize.Int32)
{
EmitLdc_I4((int)Value);
}
else
{
EmitLdc_I8(Value);
}
}
public void EmitLdc_I4(int Value)
{
ILBlock.Add(new AILOpCodeConst(Value));
}
public void EmitLdc_I8(long Value)
{
ILBlock.Add(new AILOpCodeConst(Value));
}
public void EmitLdc_R4(float Value)
{
ILBlock.Add(new AILOpCodeConst(Value));
}
public void EmitLdc_R8(double Value)
{
ILBlock.Add(new AILOpCodeConst(Value));
}
public void EmitZNFlagCheck()
{
EmitZNCheck(OpCodes.Ceq, (int)APState.ZBit);
EmitZNCheck(OpCodes.Clt, (int)APState.NBit);
}
private void EmitZNCheck(OpCode ILCmpOp, int Flag)
{
Emit(OpCodes.Dup);
Emit(OpCodes.Ldc_I4_0);
if (CurrOp.RegisterSize != ARegisterSize.Int32)
{
Emit(OpCodes.Conv_I8);
}
Emit(ILCmpOp);
EmitStflg(Flag);
}
}
}