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Implement inline memory load/store exclusive and ordered (#1413)

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* Implement inline memory load/store exclusive

* Fix missing REX prefix on 8-bits CMPXCHG

* Increment PTC version due to bugfix

* Remove redundant memory checks

* Address PR feedback

* Increment PPTC version
This commit is contained in:
gdkchan 2020-07-30 11:29:28 -03:00 committed by GitHub
parent 57bb0abda3
commit 9878fc2d3c
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
19 changed files with 385 additions and 376 deletions
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4
ARMeilleure/CodeGen/Optimizations/Optimizer.cs
View file

@ -138,7 +138,9 @@ namespace ARMeilleure.CodeGen.Optimizations
{
return (node is Operation operation) && (operation.Instruction == Instruction.Call
|| operation.Instruction == Instruction.Tailcall
|| operation.Instruction == Instruction.CompareAndSwap);
|| operation.Instruction == Instruction.CompareAndSwap
|| operation.Instruction == Instruction.CompareAndSwap16
|| operation.Instruction == Instruction.CompareAndSwap8);
}
private static bool IsPropagableCopy(Operation operation)

16
ARMeilleure/CodeGen/X86/Assembler.cs
View file

@ -101,6 +101,7 @@ namespace ARMeilleure.CodeGen.X86
Add(X86Instruction.Cmpss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fc2, InstructionFlags.Vex | InstructionFlags.PrefixF3));
Add(X86Instruction.Cmpxchg, new InstructionInfo(0x00000fb1, BadOp, BadOp, BadOp, BadOp, InstructionFlags.None));
Add(X86Instruction.Cmpxchg16b, new InstructionInfo(0x01000fc7, BadOp, BadOp, BadOp, BadOp, InstructionFlags.RexW));
Add(X86Instruction.Cmpxchg8, new InstructionInfo(0x00000fb0, BadOp, BadOp, BadOp, BadOp, InstructionFlags.Reg8Src));
Add(X86Instruction.Comisd, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f2f, InstructionFlags.Vex | InstructionFlags.Prefix66));
Add(X86Instruction.Comiss, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000f2f, InstructionFlags.Vex));
Add(X86Instruction.Cpuid, new InstructionInfo(BadOp, BadOp, BadOp, BadOp, 0x00000fa2, InstructionFlags.RegOnly));
@ -353,6 +354,14 @@ namespace ARMeilleure.CodeGen.X86
WriteInstruction(memOp, src, src.Type, X86Instruction.Cmpxchg);
}
public void Cmpxchg16(MemoryOperand memOp, Operand src)
{
WriteByte(LockPrefix);
WriteByte(0x66);
WriteInstruction(memOp, src, src.Type, X86Instruction.Cmpxchg);
}
public void Cmpxchg16b(MemoryOperand memOp)
{
WriteByte(LockPrefix);
@ -360,6 +369,13 @@ namespace ARMeilleure.CodeGen.X86
WriteInstruction(memOp, null, OperandType.None, X86Instruction.Cmpxchg16b);
}
public void Cmpxchg8(MemoryOperand memOp, Operand src)
{
WriteByte(LockPrefix);
WriteInstruction(memOp, src, src.Type, X86Instruction.Cmpxchg8);
}
public void Comisd(Operand src1, Operand src2)
{
WriteInstruction(src1, null, src2, X86Instruction.Comisd);

28
ARMeilleure/CodeGen/X86/CodeGenerator.cs
View file

@ -39,6 +39,8 @@ namespace ARMeilleure.CodeGen.X86
Add(Instruction.Call, GenerateCall);
Add(Instruction.Clobber, GenerateClobber);
Add(Instruction.CompareAndSwap, GenerateCompareAndSwap);
Add(Instruction.CompareAndSwap16, GenerateCompareAndSwap16);
Add(Instruction.CompareAndSwap8, GenerateCompareAndSwap8);
Add(Instruction.CompareEqual, GenerateCompareEqual);
Add(Instruction.CompareGreater, GenerateCompareGreater);
Add(Instruction.CompareGreaterOrEqual, GenerateCompareGreaterOrEqual);
@ -587,6 +589,32 @@ namespace ARMeilleure.CodeGen.X86
}
}
private static void GenerateCompareAndSwap16(CodeGenContext context, Operation operation)
{
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
Operand src3 = operation.GetSource(2);
EnsureSameType(src2, src3);
MemoryOperand memOp = MemoryOp(src3.Type, src1);
context.Assembler.Cmpxchg16(memOp, src3);
}
private static void GenerateCompareAndSwap8(CodeGenContext context, Operation operation)
{
Operand src1 = operation.GetSource(0);
Operand src2 = operation.GetSource(1);
Operand src3 = operation.GetSource(2);
EnsureSameType(src2, src3);
MemoryOperand memOp = MemoryOp(src3.Type, src1);
context.Assembler.Cmpxchg8(memOp, src3);
}
private static void GenerateCompareEqual(CodeGenContext context, Operation operation)
{
GenerateCompare(context, operation, X86Condition.Equal);

2
ARMeilleure/CodeGen/X86/PreAllocator.cs
View file

@ -207,6 +207,8 @@ namespace ARMeilleure.CodeGen.X86
switch (operation.Instruction)
{
case Instruction.CompareAndSwap:
case Instruction.CompareAndSwap16:
case Instruction.CompareAndSwap8:
{
OperandType type = operation.GetSource(1).Type;

1
ARMeilleure/CodeGen/X86/X86Instruction.cs
View file

@ -30,6 +30,7 @@ namespace ARMeilleure.CodeGen.X86
Cmpss,
Cmpxchg,
Cmpxchg16b,
Cmpxchg8,
Comisd,
Comiss,
Cpuid,

15
ARMeilleure/Instructions/InstEmitMemoryEx.cs
View file

@ -23,7 +23,7 @@ namespace ARMeilleure.Instructions
public static void Clrex(ArmEmitterContext context)
{
context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ClearExclusive)));
EmitClearExclusive(context);
}
public static void Dmb(ArmEmitterContext context) => EmitBarrier(context);
@ -139,8 +139,6 @@ namespace ARMeilleure.Instructions
Operand t = GetIntOrZR(context, op.Rt);
Operand s = null;
if (pair)
{
Debug.Assert(op.Size == 2 || op.Size == 3, "Invalid size for pairwise store.");
@ -159,18 +157,11 @@ namespace ARMeilleure.Instructions
value = context.VectorInsert(value, t2, 1);
}
s = EmitStoreExclusive(context, address, value, exclusive, op.Size + 1);
EmitStoreExclusive(context, address, value, exclusive, op.Size + 1, op.Rs, a32: false);
}
else
{
s = EmitStoreExclusive(context, address, t, exclusive, op.Size);
}
if (s != null)
{
// This is only needed for exclusive stores. The function returns 0
// when the store is successful, and 1 otherwise.
SetIntOrZR(context, op.Rs, s);
EmitStoreExclusive(context, address, t, exclusive, op.Size, op.Rs, a32: false);
}
}

23
ARMeilleure/Instructions/InstEmitMemoryEx32.cs
View file

@ -13,7 +13,7 @@ namespace ARMeilleure.Instructions
{
public static void Clrex(ArmEmitterContext context)
{
context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ClearExclusive)));
EmitClearExclusive(context);
}
public static void Dmb(ArmEmitterContext context) => EmitBarrier(context);
@ -198,34 +198,21 @@ namespace ARMeilleure.Instructions
context.BranchIfTrue(lblBigEndian, GetFlag(PState.EFlag));
Operand leResult = context.BitwiseOr(lo, context.ShiftLeft(hi, Const(32)));
Operand leS = EmitStoreExclusive(context, address, leResult, exclusive, size);
if (exclusive)
{
SetIntA32(context, op.Rd, leS);
}
EmitStoreExclusive(context, address, leResult, exclusive, size, op.Rd, a32: true);
context.Branch(lblEnd);
context.MarkLabel(lblBigEndian);
Operand beResult = context.BitwiseOr(hi, context.ShiftLeft(lo, Const(32)));
Operand beS = EmitStoreExclusive(context, address, beResult, exclusive, size);
if (exclusive)
{
SetIntA32(context, op.Rd, beS);
}
EmitStoreExclusive(context, address, beResult, exclusive, size, op.Rd, a32: true);
context.MarkLabel(lblEnd);
}
else
{
Operand s = EmitStoreExclusive(context, address, context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.Rt)), exclusive, size);
// This is only needed for exclusive stores. The function returns 0
// when the store is successful, and 1 otherwise.
if (exclusive)
{
SetIntA32(context, op.Rd, s);
}
Operand value = context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.Rt));
EmitStoreExclusive(context, address, value, exclusive, size, op.Rd, a32: true);
}
}
}

183
ARMeilleure/Instructions/InstEmitMemoryExHelper.cs
View file

@ -1,87 +1,180 @@
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.State;
using ARMeilleure.Translation;
using System.Reflection;
using static ARMeilleure.Instructions.InstEmitHelper;
using static ARMeilleure.IntermediateRepresentation.OperandHelper;
namespace ARMeilleure.Instructions
{
static class InstEmitMemoryExHelper
{
public static Operand EmitLoadExclusive(
ArmEmitterContext context,
Operand address,
bool exclusive,
int size)
{
MethodInfo info = null;
private const int ErgSizeLog2 = 4;
public static Operand EmitLoadExclusive(ArmEmitterContext context, Operand address, bool exclusive, int size)
{
if (exclusive)
{
switch (size)
Operand value;
if (size == 4)
{
case 0: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadByteExclusive)); break;
case 1: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadUInt16Exclusive)); break;
case 2: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadUInt32Exclusive)); break;
case 3: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadUInt64Exclusive)); break;
case 4: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadVector128Exclusive)); break;
}
Operand isUnalignedAddr = InstEmitMemoryHelper.EmitAddressCheck(context, address, size);
Operand lblFastPath = Label();
context.BranchIfFalse(lblFastPath, isUnalignedAddr);
// The call is not expected to return (it should throw).
context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ThrowInvalidMemoryAccess)), address);
context.MarkLabel(lblFastPath);
// Only 128-bit CAS is guaranteed to have a atomic load.
Operand physAddr = InstEmitMemoryHelper.EmitPtPointerLoad(context, address, null, write: false);
Operand zero = context.VectorZero();
value = context.CompareAndSwap(physAddr, zero, zero);
}
else
{
switch (size)
value = InstEmitMemoryHelper.EmitReadIntAligned(context, address, size);
}
Operand arg0 = context.LoadArgument(OperandType.I64, 0);
Operand exAddrPtr = context.Add(arg0, Const((long)NativeContext.GetExclusiveAddressOffset()));
Operand exValuePtr = context.Add(arg0, Const((long)NativeContext.GetExclusiveValueOffset()));
context.Store(exAddrPtr, context.BitwiseAnd(address, Const(address.Type, GetExclusiveAddressMask())));
context.Store(exValuePtr, value);
return value;
}
else
{
case 0: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadByte)); break;
case 1: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadUInt16)); break;
case 2: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadUInt32)); break;
case 3: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadUInt64)); break;
case 4: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadVector128)); break;
return InstEmitMemoryHelper.EmitReadIntAligned(context, address, size);
}
}
return context.Call(info, address);
}
public static Operand EmitStoreExclusive(
public static void EmitStoreExclusive(
ArmEmitterContext context,
Operand address,
Operand value,
bool exclusive,
int size)
int size,
int rs,
bool a32)
{
if (size < 3)
{
value = context.ConvertI64ToI32(value);
}
MethodInfo info = null;
if (exclusive)
{
switch (size)
void SetRs(Operand value)
{
case 0: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteByteExclusive)); break;
case 1: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteUInt16Exclusive)); break;
case 2: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteUInt32Exclusive)); break;
case 3: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteUInt64Exclusive)); break;
case 4: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteVector128Exclusive)); break;
}
return context.Call(info, address, value);
if (a32)
{
SetIntA32(context, rs, value);
}
else
{
switch (size)
SetIntOrZR(context, rs, value);
}
}
Operand arg0 = context.LoadArgument(OperandType.I64, 0);
Operand exAddrPtr = context.Add(arg0, Const((long)NativeContext.GetExclusiveAddressOffset()));
Operand exAddr = context.Load(address.Type, exAddrPtr);
// STEP 1: Check if we have exclusive access to this memory region. If not, fail and skip store.
Operand maskedAddress = context.BitwiseAnd(address, Const(GetExclusiveAddressMask()));
Operand exFailed = context.ICompareNotEqual(exAddr, maskedAddress);
Operand lblExit = Label();
SetRs(exFailed);
context.BranchIfTrue(lblExit, exFailed);
// STEP 2: We have exclusive access, make sure that the address is valid.
Operand isUnalignedAddr = InstEmitMemoryHelper.EmitAddressCheck(context, address, size);
Operand lblFastPath = Label();
context.BranchIfFalse(lblFastPath, isUnalignedAddr);
// The call is not expected to return (it should throw).
context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ThrowInvalidMemoryAccess)), address);
// STEP 3: We have exclusive access and the address is valid, attempt the store using CAS.
context.MarkLabel(lblFastPath);
Operand physAddr = InstEmitMemoryHelper.EmitPtPointerLoad(context, address, null, write: true);
Operand exValuePtr = context.Add(arg0, Const((long)NativeContext.GetExclusiveValueOffset()));
Operand exValue = size switch
{
case 0: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteByte)); break;
case 1: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteUInt16)); break;
case 2: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteUInt32)); break;
case 3: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteUInt64)); break;
case 4: info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteVector128)); break;
0 => context.Load8(exValuePtr),
1 => context.Load16(exValuePtr),
2 => context.Load(OperandType.I32, exValuePtr),
3 => context.Load(OperandType.I64, exValuePtr),
_ => context.Load(OperandType.V128, exValuePtr)
};
Operand currValue = size switch
{
0 => context.CompareAndSwap8(physAddr, exValue, value),
1 => context.CompareAndSwap16(physAddr, exValue, value),
_ => context.CompareAndSwap(physAddr, exValue, value)
};
// STEP 4: Check if we succeeded by comparing expected and in-memory values.
Operand storeFailed;
if (size == 4)
{
Operand currValueLow = context.VectorExtract(OperandType.I64, currValue, 0);
Operand currValueHigh = context.VectorExtract(OperandType.I64, currValue, 1);
Operand exValueLow = context.VectorExtract(OperandType.I64, exValue, 0);
Operand exValueHigh = context.VectorExtract(OperandType.I64, exValue, 1);
storeFailed = context.BitwiseOr(
context.ICompareNotEqual(currValueLow, exValueLow),
context.ICompareNotEqual(currValueHigh, exValueHigh));
}
else
{
storeFailed = context.ICompareNotEqual(currValue, exValue);
}
context.Call(info, address, value);
SetRs(storeFailed);
return null;
context.MarkLabel(lblExit);
}
else
{
InstEmitMemoryHelper.EmitWriteIntAligned(context, address, value, size);
}
}
public static void EmitClearExclusive(ArmEmitterContext context)
{
Operand arg0 = context.LoadArgument(OperandType.I64, 0);
Operand exAddrPtr = context.Add(arg0, Const((long)NativeContext.GetExclusiveAddressOffset()));
// We store ULONG max to force any exclusive address checks to fail,
// since this value is not aligned to the ERG mask.
context.Store(exAddrPtr, Const(ulong.MaxValue));
}
private static long GetExclusiveAddressMask() => ~((4L << ErgSizeLog2) - 1);
}
}

117
ARMeilleure/Instructions/InstEmitMemoryHelper.cs
View file

@ -140,7 +140,7 @@ namespace ARMeilleure.Instructions
context.MarkLabel(lblFastPath);
Operand physAddr = EmitPtPointerLoad(context, address, lblSlowPath);
Operand physAddr = EmitPtPointerLoad(context, address, lblSlowPath, write: false);
Operand value = null;
@ -157,6 +157,36 @@ namespace ARMeilleure.Instructions
context.MarkLabel(lblEnd);
}
public static Operand EmitReadIntAligned(ArmEmitterContext context, Operand address, int size)
{
if ((uint)size > 4)
{
throw new ArgumentOutOfRangeException(nameof(size));
}
Operand isUnalignedAddr = EmitAddressCheck(context, address, size);
Operand lblFastPath = Label();
context.BranchIfFalse(lblFastPath, isUnalignedAddr);
// The call is not expected to return (it should throw).
context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ThrowInvalidMemoryAccess)), address);
context.MarkLabel(lblFastPath);
Operand physAddr = EmitPtPointerLoad(context, address, null, write: false);
return size switch
{
0 => context.Load8(physAddr),
1 => context.Load16(physAddr),
2 => context.Load(OperandType.I32, physAddr),
3 => context.Load(OperandType.I64, physAddr),
_ => context.Load(OperandType.V128, physAddr)
};
}
private static void EmitReadVector(
ArmEmitterContext context,
Operand address,
@ -181,7 +211,7 @@ namespace ARMeilleure.Instructions
context.MarkLabel(lblFastPath);
Operand physAddr = EmitPtPointerLoad(context, address, lblSlowPath);
Operand physAddr = EmitPtPointerLoad(context, address, lblSlowPath, write: false);
Operand value = null;
@ -222,7 +252,7 @@ namespace ARMeilleure.Instructions
context.MarkLabel(lblFastPath);
Operand physAddr = EmitPtPointerLoad(context, address, lblSlowPath);
Operand physAddr = EmitPtPointerLoad(context, address, lblSlowPath, write: true);
Operand value = GetInt(context, rt);
@ -242,6 +272,45 @@ namespace ARMeilleure.Instructions
context.MarkLabel(lblEnd);
}
public static void EmitWriteIntAligned(ArmEmitterContext context, Operand address, Operand value, int size)
{
if ((uint)size > 4)
{
throw new ArgumentOutOfRangeException(nameof(size));
}
Operand isUnalignedAddr = EmitAddressCheck(context, address, size);
Operand lblFastPath = Label();
context.BranchIfFalse(lblFastPath, isUnalignedAddr);
// The call is not expected to return (it should throw).
context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ThrowInvalidMemoryAccess)), address);
context.MarkLabel(lblFastPath);
Operand physAddr = EmitPtPointerLoad(context, address, null, write: true);
if (size < 3 && value.Type == OperandType.I64)
{
value = context.ConvertI64ToI32(value);
}
if (size == 0)
{
context.Store8(physAddr, value);
}
else if (size == 1)
{
context.Store16(physAddr, value);
}
else
{
context.Store(physAddr, value);
}
}
private static void EmitWriteVector(
ArmEmitterContext context,
Operand address,
@ -265,7 +334,7 @@ namespace ARMeilleure.Instructions
context.MarkLabel(lblFastPath);
Operand physAddr = EmitPtPointerLoad(context, address, lblSlowPath);
Operand physAddr = EmitPtPointerLoad(context, address, lblSlowPath, write: true);
Operand value = GetVec(rt);
@ -281,7 +350,7 @@ namespace ARMeilleure.Instructions
context.MarkLabel(lblEnd);
}
private static Operand EmitAddressCheck(ArmEmitterContext context, Operand address, int size)
public static Operand EmitAddressCheck(ArmEmitterContext context, Operand address, int size)
{
ulong addressCheckMask = ~((1UL << context.Memory.AddressSpaceBits) - 1);
@ -290,7 +359,7 @@ namespace ARMeilleure.Instructions
return context.BitwiseAnd(address, Const(address.Type, (long)addressCheckMask));
}
private static Operand EmitPtPointerLoad(ArmEmitterContext context, Operand address, Operand lblSlowPath)
public static Operand EmitPtPointerLoad(ArmEmitterContext context, Operand address, Operand lblSlowPath, bool write)
{
int ptLevelBits = context.Memory.AddressSpaceBits - 12; // 12 = Number of page bits.
int ptLevelSize = 1 << ptLevelBits;
@ -302,6 +371,12 @@ namespace ARMeilleure.Instructions
int bit = PageBits;
// Load page table entry from the page table.
// This was designed to support multi-level page tables of any size, however right
// now we only use flat page tables (so there's only one level).
// The page table entry contains the host address where the page is located.
// Additionally, the higher 16-bits of the host address may contain extra information
// used for write tracking, so this must be handled here aswell.
do
{
Operand addrPart = context.ShiftRightUI(address, Const(bit));
@ -326,7 +401,37 @@ namespace ARMeilleure.Instructions
}
while (bit < context.Memory.AddressSpaceBits);
if (lblSlowPath != null)
{
context.BranchIfTrue(lblSlowPath, context.ICompareLessOrEqual(pte, Const(0L)));
}
else
{
// When no label is provided to jump to a slow path if the address is invalid,
// we do the validation ourselves, and throw if needed.
if (write)
{
Operand lblNotWatched = Label();
// Is the page currently being monitored for modifications? If so we need to call MarkRegionAsModified.
context.BranchIfTrue(lblNotWatched, context.ICompareGreaterOrEqual(pte, Const(0L)));
// Mark the region as modified. Size here doesn't matter as address is assumed to be size aligned here.
context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.MarkRegionAsModified)), address, Const(1UL));
context.MarkLabel(lblNotWatched);
}
Operand lblNonNull = Label();
// Skip exception if the PTE address is non-null (not zero).
context.BranchIfTrue(lblNonNull, pte);
// The call is not expected to return (it should throw).
context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ThrowInvalidMemoryAccess)), address);
context.MarkLabel(lblNonNull);
pte = context.BitwiseAnd(pte, Const(0xffffffffffffUL));
}
Operand pageOffset = context.BitwiseAnd(address, Const(address.Type, PageMask));

195
ARMeilleure/Instructions/NativeInterface.cs
View file

@ -3,38 +3,29 @@ using ARMeilleure.State;
using ARMeilleure.Translation;
using System;
using System.Runtime.InteropServices;
using System.Threading;
namespace ARMeilleure.Instructions
{
static class NativeInterface
{
private const int ErgSizeLog2 = 4;
private class ThreadContext
{
public State.ExecutionContext Context { get; }
public ExecutionContext Context { get; }
public IMemoryManager Memory { get; }
public Translator Translator { get; }
public ulong ExclusiveAddress { get; set; }
public ulong ExclusiveValueLow { get; set; }
public ulong ExclusiveValueHigh { get; set; }
public ThreadContext(State.ExecutionContext context, IMemoryManager memory, Translator translator)
public ThreadContext(ExecutionContext context, IMemoryManager memory, Translator translator)
{
Context = context;
Memory = memory;
Translator = translator;
ExclusiveAddress = ulong.MaxValue;
}
}
[ThreadStatic]
private static ThreadContext _context;
public static void RegisterThread(State.ExecutionContext context, IMemoryManager memory, Translator translator)
public static void RegisterThread(ExecutionContext context, IMemoryManager memory, Translator translator)
{
_context = new ThreadContext(context, memory, translator);
}
@ -202,63 +193,6 @@ namespace ARMeilleure.Instructions
}
#endregion
#region "Read exclusive"
public static byte ReadByteExclusive(ulong address)
{
byte value = _context.Memory.Read<byte>(address);
_context.ExclusiveAddress = GetMaskedExclusiveAddress(address);
_context.ExclusiveValueLow = value;
_context.ExclusiveValueHigh = 0;
return value;
}
public static ushort ReadUInt16Exclusive(ulong address)
{
ushort value = _context.Memory.Read<ushort>(address);
_context.ExclusiveAddress = GetMaskedExclusiveAddress(address);
_context.ExclusiveValueLow = value;
_context.ExclusiveValueHigh = 0;
return value;
}
public static uint ReadUInt32Exclusive(ulong address)
{
uint value = _context.Memory.Read<uint>(address);
_context.ExclusiveAddress = GetMaskedExclusiveAddress(address);
_context.ExclusiveValueLow = value;
_context.ExclusiveValueHigh = 0;
return value;
}
public static ulong ReadUInt64Exclusive(ulong address)
{
ulong value = _context.Memory.Read<ulong>(address);
_context.ExclusiveAddress = GetMaskedExclusiveAddress(address);
_context.ExclusiveValueLow = value;
_context.ExclusiveValueHigh = 0;
return value;
}
public static V128 ReadVector128Exclusive(ulong address)
{
V128 value = MemoryManagerPal.AtomicLoad128(ref _context.Memory.GetRef<V128>(address));
_context.ExclusiveAddress = GetMaskedExclusiveAddress(address);
_context.ExclusiveValueLow = value.Extract<ulong>(0);
_context.ExclusiveValueHigh = value.Extract<ulong>(1);
return value;
}
#endregion
#region "Write"
public static void WriteByte(ulong address, byte value)
{
@ -286,122 +220,14 @@ namespace ARMeilleure.Instructions
}
#endregion
#region "Write exclusive"
public static int WriteByteExclusive(ulong address, byte value)
public static void MarkRegionAsModified(ulong address, ulong size)
{
bool success = _context.ExclusiveAddress == GetMaskedExclusiveAddress(address);
if (success)
{
ref int valueRef = ref _context.Memory.GetRefNoChecks<int>(address);
int currentValue = valueRef;
byte expected = (byte)_context.ExclusiveValueLow;
int expected32 = (currentValue & ~byte.MaxValue) | expected;
int desired32 = (currentValue & ~byte.MaxValue) | value;
success = Interlocked.CompareExchange(ref valueRef, desired32, expected32) == expected32;
if (success)
{
ClearExclusive();
}
GetMemoryManager().MarkRegionAsModified(address, size);
}
return success ? 0 : 1;
}
public static int WriteUInt16Exclusive(ulong address, ushort value)
public static void ThrowInvalidMemoryAccess(ulong address)
{
bool success = _context.ExclusiveAddress == GetMaskedExclusiveAddress(address);
if (success)
{
ref int valueRef = ref _context.Memory.GetRefNoChecks<int>(address);
int currentValue = valueRef;
ushort expected = (ushort)_context.ExclusiveValueLow;
int expected32 = (currentValue & ~ushort.MaxValue) | expected;
int desired32 = (currentValue & ~ushort.MaxValue) | value;
success = Interlocked.CompareExchange(ref valueRef, desired32, expected32) == expected32;
if (success)
{
ClearExclusive();
}
}
return success ? 0 : 1;
}
public static int WriteUInt32Exclusive(ulong address, uint value)
{
bool success = _context.ExclusiveAddress == GetMaskedExclusiveAddress(address);
if (success)
{
ref int valueRef = ref _context.Memory.GetRef<int>(address);
success = Interlocked.CompareExchange(ref valueRef, (int)value, (int)_context.ExclusiveValueLow) == (int)_context.ExclusiveValueLow;
if (success)
{
ClearExclusive();
}
}
return success ? 0 : 1;
}
public static int WriteUInt64Exclusive(ulong address, ulong value)
{
bool success = _context.ExclusiveAddress == GetMaskedExclusiveAddress(address);
if (success)
{
ref long valueRef = ref _context.Memory.GetRef<long>(address);
success = Interlocked.CompareExchange(ref valueRef, (long)value, (long)_context.ExclusiveValueLow) == (long)_context.ExclusiveValueLow;
if (success)
{
ClearExclusive();
}
}
return success ? 0 : 1;
}
public static int WriteVector128Exclusive(ulong address, V128 value)
{
bool success = _context.ExclusiveAddress == GetMaskedExclusiveAddress(address);
if (success)
{
V128 expected = new V128(_context.ExclusiveValueLow, _context.ExclusiveValueHigh);
ref V128 location = ref _context.Memory.GetRef<V128>(address);
success = MemoryManagerPal.CompareAndSwap128(ref location, expected, value) == expected;
if (success)
{
ClearExclusive();
}
}
return success ? 0 : 1;
}
#endregion
private static ulong GetMaskedExclusiveAddress(ulong address)
{
return address & ~((4UL << ErgSizeLog2) - 1);
throw new InvalidAccessException(address);
}
public static ulong GetFunctionAddress(ulong address)
@ -426,11 +252,6 @@ namespace ARMeilleure.Instructions
return ptr;
}
public static void ClearExclusive()
{
_context.ExclusiveAddress = ulong.MaxValue;
}
public static bool CheckSynchronization()
{
Statistics.PauseTimer();
@ -444,7 +265,7 @@ namespace ARMeilleure.Instructions
return context.Running;
}
public static State.ExecutionContext GetContext()
public static ExecutionContext GetContext()
{
return _context.Context;
}

2
ARMeilleure/IntermediateRepresentation/Instruction.cs
View file

@ -13,6 +13,8 @@ namespace ARMeilleure.IntermediateRepresentation
ByteSwap,
Call,
CompareAndSwap,
CompareAndSwap16,
CompareAndSwap8,
CompareEqual,
CompareGreater,
CompareGreaterOrEqual,

3
ARMeilleure/Memory/IMemoryManager.cs
View file

@ -12,8 +12,9 @@ namespace ARMeilleure.Memory
void Write<T>(ulong va, T value) where T : unmanaged;
ref T GetRef<T>(ulong va) where T : unmanaged;
ref T GetRefNoChecks<T>(ulong va) where T : unmanaged;
bool IsMapped(ulong va);
void MarkRegionAsModified(ulong va, ulong size);
}
}

23
ARMeilleure/Memory/InvalidAccessException.cs Normal file
View file

@ -0,0 +1,23 @@
using System;
namespace ARMeilleure.Memory
{
class InvalidAccessException : Exception
{
public InvalidAccessException()
{
}
public InvalidAccessException(ulong address) : base($"Invalid memory access at virtual address 0x{address:X16}.")
{
}
public InvalidAccessException(string message) : base(message)
{
}
public InvalidAccessException(string message, Exception innerException) : base(message, innerException)
{
}
}
}

76
ARMeilleure/Memory/MemoryManagerPal.cs
View file

@ -1,76 +0,0 @@
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.State;
using ARMeilleure.Translation;
namespace ARMeilleure.Memory
{
static class MemoryManagerPal
{
private delegate V128 CompareExchange128(ref V128 location, V128 expected, V128 desired);
private static CompareExchange128 _compareExchange128;
private static object _lock;
static MemoryManagerPal()
{
_lock = new object();
}
public static V128 AtomicLoad128(ref V128 location)
{
return GetCompareAndSwap128()(ref location, V128.Zero, V128.Zero);
}
public static V128 CompareAndSwap128(ref V128 location, V128 expected, V128 desired)
{
return GetCompareAndSwap128()(ref location, expected, desired);
}
private static CompareExchange128 GetCompareAndSwap128()
{
if (_compareExchange128 == null)
{
GenerateCompareAndSwap128();
}
return _compareExchange128;
}
private static void GenerateCompareAndSwap128()
{
lock (_lock)
{
if (_compareExchange128 != null)
{
return;
}
EmitterContext context = new EmitterContext();
Operand address = context.LoadArgument(OperandType.I64, 0);
Operand expected = context.LoadArgument(OperandType.V128, 1);
Operand desired = context.LoadArgument(OperandType.V128, 2);
Operand result = context.CompareAndSwap(address, expected, desired);
context.Return(result);
ControlFlowGraph cfg = context.GetControlFlowGraph();
OperandType[] argTypes = new OperandType[]
{
OperandType.I64,
OperandType.V128,
OperandType.V128
};
_compareExchange128 = Compiler.Compile<CompareExchange128>(
cfg,
argTypes,
OperandType.V128,
CompilerOptions.HighCq);
}
}
}
}

15
ARMeilleure/State/NativeContext.cs
View file

@ -15,6 +15,9 @@ namespace ARMeilleure.State
public fixed uint FpFlags[RegisterConsts.FpFlagsCount];
public int Counter;
public ulong CallAddress;
public ulong ExclusiveAddress;
public ulong ExclusiveValueLow;
public ulong ExclusiveValueHigh;
}
private static NativeCtxStorage _dummyStorage = new NativeCtxStorage();
@ -26,6 +29,8 @@ namespace ARMeilleure.State
public NativeContext(IJitMemoryAllocator allocator)
{
_block = allocator.Allocate((ulong)Unsafe.SizeOf<NativeCtxStorage>());
GetStorage().ExclusiveAddress = ulong.MaxValue;
}
public unsafe ulong GetX(int index)
@ -162,6 +167,16 @@ namespace ARMeilleure.State
return StorageOffset(ref _dummyStorage, ref _dummyStorage.CallAddress);
}
public static int GetExclusiveAddressOffset()
{
return StorageOffset(ref _dummyStorage, ref _dummyStorage.ExclusiveAddress);
}
public static int GetExclusiveValueOffset()
{
return StorageOffset(ref _dummyStorage, ref _dummyStorage.ExclusiveValueLow);
}
private static int StorageOffset<T>(ref NativeCtxStorage storage, ref T target)
{
return (int)Unsafe.ByteOffset(ref Unsafe.As<NativeCtxStorage, T>(ref storage), ref target);

13
ARMeilleure/Translation/Delegates.cs
View file

@ -103,7 +103,6 @@ namespace ARMeilleure.Translation
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.Break)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.CheckSynchronization)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ClearExclusive)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetCntfrqEl0)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetCntpctEl0)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetCntvctEl0)));
@ -118,33 +117,25 @@ namespace ARMeilleure.Translation
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidr32))); // A32 only.
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidrEl0)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetTpidrEl032))); // A32 only.
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.MarkRegionAsModified)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadByte)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadByteExclusive)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadUInt16)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadUInt16Exclusive)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadUInt32)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadUInt32Exclusive)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadUInt64)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadUInt64Exclusive)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadVector128)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ReadVector128Exclusive)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.SetFpcr)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.SetFpscr))); // A32 only.
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.SetFpsr)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.SetTpidrEl0)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.SetTpidrEl032))); // A32 only.
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.SupervisorCall)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.ThrowInvalidMemoryAccess)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.Undefined)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteByte)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteByteExclusive)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteUInt16)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteUInt16Exclusive)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteUInt32)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteUInt32Exclusive)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteUInt64)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteUInt64Exclusive)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteVector128)));
SetDelegateInfo(typeof(NativeInterface).GetMethod(nameof(NativeInterface.WriteVector128Exclusive)));
SetDelegateInfo(typeof(SoftFallback).GetMethod(nameof(SoftFallback.BinarySignedSatQAcc)));
SetDelegateInfo(typeof(SoftFallback).GetMethod(nameof(SoftFallback.BinarySignedSatQAdd)));

10
ARMeilleure/Translation/EmitterContext.cs
View file

@ -178,6 +178,16 @@ namespace ARMeilleure.Translation
return Add(Instruction.CompareAndSwap, Local(desired.Type), address, expected, desired);
}
public Operand CompareAndSwap16(Operand address, Operand expected, Operand desired)
{
return Add(Instruction.CompareAndSwap16, Local(OperandType.I32), address, expected, desired);
}
public Operand CompareAndSwap8(Operand address, Operand expected, Operand desired)
{
return Add(Instruction.CompareAndSwap8, Local(OperandType.I32), address, expected, desired);
}
public Operand ConditionalSelect(Operand op1, Operand op2, Operand op3)
{
return Add(Instruction.ConditionalSelect, Local(op2.Type), op1, op2, op3);

2
ARMeilleure/Translation/PTC/Ptc.cs
View file

@ -20,7 +20,7 @@ namespace ARMeilleure.Translation.PTC
{
private const string HeaderMagic = "PTChd";
private const int InternalVersion = 17; //! To be incremented manually for each change to the ARMeilleure project.
private const int InternalVersion = 18; //! To be incremented manually for each change to the ARMeilleure project.
private const string BaseDir = "Ryujinx";

23
Ryujinx.Cpu/MemoryManager.cs
View file

@ -276,14 +276,6 @@ namespace Ryujinx.Cpu
private void ThrowMemoryNotContiguous() => throw new MemoryNotContiguousException();
// TODO: Remove that once we have proper 8-bits and 16-bits CAS.
public ref T GetRefNoChecks<T>(ulong va) where T : unmanaged
{
MarkRegionAsModified(va, (ulong)Unsafe.SizeOf<T>());
return ref _backingMemory.GetRef<T>(GetPhysicalAddressInternal(va));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private bool IsContiguousAndMapped(ulong va, int size) => IsContiguous(va, size) && IsMapped(va);
@ -497,7 +489,12 @@ namespace Ryujinx.Cpu
return PteToPa(_pageTable.Read<ulong>((va / PageSize) * PteSize) & ~(0xffffUL << 48)) + (va & PageMask);
}
private void MarkRegionAsModified(ulong va, ulong size)
/// <summary>
/// Marks a region of memory as modified by the CPU.
/// </summary>
/// <param name="va">Virtual address of the region</param>
/// <param name="size">Size of the region</param>
public void MarkRegionAsModified(ulong va, ulong size)
{
ulong endVa = (va + size + PageMask) & ~(ulong)PageMask;
@ -532,9 +529,9 @@ namespace Ryujinx.Cpu
return (ulong)((long)pte - _backingMemory.Pointer.ToInt64());
}
public void Dispose()
{
_pageTable.Dispose();
}
/// <summary>
/// Disposes of resources used by the memory manager.
/// </summary>
public void Dispose() => _pageTable.Dispose();
}
}