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Refactor NativeContext (#1410)

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* Refactor NativeContext

* Fix bugs

* Use correct counts

* Check index using register count constants
This commit is contained in:
gdkchan 2020-07-24 16:13:14 -03:00 committed by GitHub
parent 41ac824273
commit 80d4199fb3
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1 changed files with 67 additions and 94 deletions
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161
ARMeilleure/State/NativeContext.cs
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@ -1,21 +1,23 @@
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.Memory;
using System;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
namespace ARMeilleure.State
{
class NativeContext : IDisposable
{
private const int IntSize = 8;
private const int VecSize = 16;
private const int FlagSize = 4;
private const int ExtraSize = 8;
private unsafe struct NativeCtxStorage
{
public fixed ulong X[RegisterConsts.IntRegsCount];
public fixed ulong V[RegisterConsts.VecRegsCount * 2];
public fixed uint Flags[RegisterConsts.FlagsCount];
public fixed uint FpFlags[RegisterConsts.FpFlagsCount];
public int Counter;
public ulong CallAddress;
}
private const int TotalSize = RegisterConsts.IntRegsCount * IntSize +
RegisterConsts.VecRegsCount * VecSize +
RegisterConsts.FlagsCount * FlagSize +
RegisterConsts.FpFlagsCount * FlagSize + ExtraSize;
private static NativeCtxStorage _dummyStorage = new NativeCtxStorage();
private readonly IJitMemoryBlock _block;
@ -23,179 +25,150 @@ namespace ARMeilleure.State
public NativeContext(IJitMemoryAllocator allocator)
{
_block = allocator.Allocate(TotalSize);
_block = allocator.Allocate((ulong)Unsafe.SizeOf<NativeCtxStorage>());
}
public ulong GetX(int index)
public unsafe ulong GetX(int index)
{
if ((uint)index >= RegisterConsts.IntRegsCount)
{
throw new ArgumentOutOfRangeException(nameof(index));
}
return (ulong)Marshal.ReadInt64(BasePtr, index * IntSize);
return GetStorage().X[index];
}
public void SetX(int index, ulong value)
public unsafe void SetX(int index, ulong value)
{
if ((uint)index >= RegisterConsts.IntRegsCount)
{
throw new ArgumentOutOfRangeException(nameof(index));
}
Marshal.WriteInt64(BasePtr, index * IntSize, (long)value);
GetStorage().X[index] = value;
}
public V128 GetV(int index)
public unsafe V128 GetV(int index)
{
if ((uint)index >= RegisterConsts.IntRegsCount)
if ((uint)index >= RegisterConsts.VecRegsCount)
{
throw new ArgumentOutOfRangeException(nameof(index));
}
int offset = RegisterConsts.IntRegsCount * IntSize + index * VecSize;
return new V128(
Marshal.ReadInt64(BasePtr, offset + 0),
Marshal.ReadInt64(BasePtr, offset + 8));
return new V128(GetStorage().V[index * 2 + 0], GetStorage().V[index * 2 + 1]);
}
public void SetV(int index, V128 value)
public unsafe void SetV(int index, V128 value)
{
if ((uint)index >= RegisterConsts.IntRegsCount)
if ((uint)index >= RegisterConsts.VecRegsCount)
{
throw new ArgumentOutOfRangeException(nameof(index));
}
int offset = RegisterConsts.IntRegsCount * IntSize + index * VecSize;
Marshal.WriteInt64(BasePtr, offset + 0, value.Extract<long>(0));
Marshal.WriteInt64(BasePtr, offset + 8, value.Extract<long>(1));
GetStorage().V[index * 2 + 0] = value.Extract<ulong>(0);
GetStorage().V[index * 2 + 1] = value.Extract<ulong>(1);
}
public bool GetPstateFlag(PState flag)
public unsafe bool GetPstateFlag(PState flag)
{
if ((uint)flag >= RegisterConsts.FlagsCount)
{
throw new ArgumentException($"Invalid flag \"{flag}\" specified.");
}
int offset =
RegisterConsts.IntRegsCount * IntSize +
RegisterConsts.VecRegsCount * VecSize + (int)flag * FlagSize;
int value = Marshal.ReadInt32(BasePtr, offset);
return value != 0;
return GetStorage().Flags[(int)flag] != 0;
}
public void SetPstateFlag(PState flag, bool value)
public unsafe void SetPstateFlag(PState flag, bool value)
{
if ((uint)flag >= RegisterConsts.FlagsCount)
{
throw new ArgumentException($"Invalid flag \"{flag}\" specified.");
}
int offset =
RegisterConsts.IntRegsCount * IntSize +
RegisterConsts.VecRegsCount * VecSize + (int)flag * FlagSize;
Marshal.WriteInt32(BasePtr, offset, value ? 1 : 0);
GetStorage().Flags[(int)flag] = value ? 1u : 0u;
}
public bool GetFPStateFlag(FPState flag)
public unsafe bool GetFPStateFlag(FPState flag)
{
if ((uint)flag >= RegisterConsts.FlagsCount)
if ((uint)flag >= RegisterConsts.FpFlagsCount)
{
throw new ArgumentException($"Invalid flag \"{flag}\" specified.");
}
int offset =
RegisterConsts.IntRegsCount * IntSize +
RegisterConsts.VecRegsCount * VecSize +
RegisterConsts.FlagsCount * FlagSize + (int)flag * FlagSize;
int value = Marshal.ReadInt32(BasePtr, offset);
return value != 0;
return GetStorage().FpFlags[(int)flag] != 0;
}
public void SetFPStateFlag(FPState flag, bool value)
public unsafe void SetFPStateFlag(FPState flag, bool value)
{
if ((uint)flag >= RegisterConsts.FlagsCount)
if ((uint)flag >= RegisterConsts.FpFlagsCount)
{
throw new ArgumentException($"Invalid flag \"{flag}\" specified.");
}
int offset =
RegisterConsts.IntRegsCount * IntSize +
RegisterConsts.VecRegsCount * VecSize +
RegisterConsts.FlagsCount * FlagSize + (int)flag * FlagSize;
Marshal.WriteInt32(BasePtr, offset, value ? 1 : 0);
GetStorage().FpFlags[(int)flag] = value ? 1u : 0u;
}
public int GetCounter()
{
return Marshal.ReadInt32(BasePtr, GetCounterOffset());
}
public int GetCounter() => GetStorage().Counter;
public void SetCounter(int value) => GetStorage().Counter = value;
public void SetCounter(int value)
public unsafe static int GetRegisterOffset(Register reg)
{
Marshal.WriteInt32(BasePtr, GetCounterOffset(), value);
}
public static int GetRegisterOffset(Register reg)
{
int offset, size;
if (reg.Type == RegisterType.Integer)
{
offset = reg.Index * IntSize;
if ((uint)reg.Index >= RegisterConsts.IntRegsCount)
{
throw new ArgumentException("Invalid register.");
}
size = IntSize;
return StorageOffset(ref _dummyStorage, ref _dummyStorage.X[reg.Index]);
}
else if (reg.Type == RegisterType.Vector)
{
offset = RegisterConsts.IntRegsCount * IntSize + reg.Index * VecSize;
if ((uint)reg.Index >= RegisterConsts.VecRegsCount)
{
throw new ArgumentException("Invalid register.");
}
size = VecSize;
return StorageOffset(ref _dummyStorage, ref _dummyStorage.V[reg.Index * 2]);
}
else /* if (reg.Type == RegisterType.Flag) */
else if (reg.Type == RegisterType.Flag)
{
offset = RegisterConsts.IntRegsCount * IntSize +
RegisterConsts.VecRegsCount * VecSize + reg.Index * FlagSize;
if ((uint)reg.Index >= RegisterConsts.FlagsCount)
{
throw new ArgumentException("Invalid register.");
}
size = FlagSize;
return StorageOffset(ref _dummyStorage, ref _dummyStorage.Flags[reg.Index]);
}
if ((uint)(offset + size) > (uint)TotalSize)
else /* if (reg.Type == RegisterType.FpFlag) */
{
throw new ArgumentException("Invalid register.");
}
if ((uint)reg.Index >= RegisterConsts.FpFlagsCount)
{
throw new ArgumentException("Invalid register.");
}
return offset;
return StorageOffset(ref _dummyStorage, ref _dummyStorage.FpFlags[reg.Index]);
}
}
public static int GetCounterOffset()
{
return RegisterConsts.IntRegsCount * IntSize +
RegisterConsts.VecRegsCount * VecSize +
RegisterConsts.FlagsCount * FlagSize +
RegisterConsts.FpFlagsCount * FlagSize;
return StorageOffset(ref _dummyStorage, ref _dummyStorage.Counter);
}
public static int GetCallAddressOffset()
{
return RegisterConsts.IntRegsCount * IntSize +
RegisterConsts.VecRegsCount * VecSize +
RegisterConsts.FlagsCount * FlagSize +
RegisterConsts.FpFlagsCount * FlagSize + 4;
return StorageOffset(ref _dummyStorage, ref _dummyStorage.CallAddress);
}
public void Dispose()
private static int StorageOffset<T>(ref NativeCtxStorage storage, ref T target)
{
_block.Dispose();
return (int)Unsafe.ByteOffset(ref Unsafe.As<NativeCtxStorage, T>(ref storage), ref target);
}
private unsafe ref NativeCtxStorage GetStorage() => ref Unsafe.AsRef<NativeCtxStorage>((void*)_block.Pointer);
public void Dispose() => _block.Dispose();
}
}