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using ARMeilleure.Memory;
using ARMeilleure.State;
using System;
namespace ARMeilleure.Instructions
{
static class NativeInterface
{
private const int ErgSizeLog2 = 4;
private class ThreadContext
{
public ExecutionContext Context { get; }
public MemoryManager Memory { get; }
public ulong ExclusiveAddress { get; set; }
public ulong ExclusiveValueLow { get; set; }
public ulong ExclusiveValueHigh { get; set; }
public ThreadContext(ExecutionContext context, MemoryManager memory)
{
Context = context;
Memory = memory;
ExclusiveAddress = ulong.MaxValue;
}
}
[ThreadStatic]
private static ThreadContext _context;
public static void RegisterThread(ExecutionContext context, MemoryManager memory)
{
_context = new ThreadContext(context, memory);
}
public static void UnregisterThread()
{
_context = null;
}
public static void Break(ulong address, int imm)
{
Statistics.PauseTimer();
GetContext().OnBreak(address, imm);
Statistics.ResumeTimer();
}
public static void SupervisorCall(ulong address, int imm)
{
Statistics.PauseTimer();
GetContext().OnSupervisorCall(address, imm);
Statistics.ResumeTimer();
}
public static void Undefined(ulong address, int opCode)
{
Statistics.PauseTimer();
GetContext().OnUndefined(address, opCode);
Statistics.ResumeTimer();
}
#region "System registers"
public static ulong GetCtrEl0()
{
return (ulong)GetContext().CtrEl0;
}
public static ulong GetDczidEl0()
{
return (ulong)GetContext().DczidEl0;
}
public static ulong GetFpcr()
{
return (ulong)GetContext().Fpcr;
}
public static ulong GetFpsr()
{
return (ulong)GetContext().Fpsr;
}
public static ulong GetTpidrEl0()
{
return (ulong)GetContext().TpidrEl0;
}
public static ulong GetTpidr()
{
return (ulong)GetContext().Tpidr;
}
public static ulong GetCntfrqEl0()
{
return GetContext().CntfrqEl0;
}
public static ulong GetCntpctEl0()
{
return GetContext().CntpctEl0;
}
public static void SetFpcr(ulong value)
{
GetContext().Fpcr = (FPCR)value;
}
public static void SetFpsr(ulong value)
{
GetContext().Fpsr = (FPSR)value;
}
public static void SetTpidrEl0(ulong value)
{
GetContext().TpidrEl0 = (long)value;
}
#endregion
#region "Read"
public static byte ReadByte(ulong address)
{
return GetMemoryManager().ReadByte((long)address);
}
public static ushort ReadUInt16(ulong address)
{
return GetMemoryManager().ReadUInt16((long)address);
}
public static uint ReadUInt32(ulong address)
{
return GetMemoryManager().ReadUInt32((long)address);
}
public static ulong ReadUInt64(ulong address)
{
return GetMemoryManager().ReadUInt64((long)address);
}
public static V128 ReadVector128(ulong address)
{
return GetMemoryManager().ReadVector128((long)address);
}
#endregion
#region "Read exclusive"
public static byte ReadByteExclusive(ulong address)
{
byte value = _context.Memory.ReadByte((long)address);
_context.ExclusiveAddress = GetMaskedExclusiveAddress(address);
_context.ExclusiveValueLow = value;
_context.ExclusiveValueHigh = 0;
return value;
}
public static ushort ReadUInt16Exclusive(ulong address)
{
ushort value = _context.Memory.ReadUInt16((long)address);
_context.ExclusiveAddress = GetMaskedExclusiveAddress(address);
_context.ExclusiveValueLow = value;
_context.ExclusiveValueHigh = 0;
return value;
}
public static uint ReadUInt32Exclusive(ulong address)
{
uint value = _context.Memory.ReadUInt32((long)address);
_context.ExclusiveAddress = GetMaskedExclusiveAddress(address);
_context.ExclusiveValueLow = value;
_context.ExclusiveValueHigh = 0;
return value;
}
public static ulong ReadUInt64Exclusive(ulong address)
{
ulong value = _context.Memory.ReadUInt64((long)address);
_context.ExclusiveAddress = GetMaskedExclusiveAddress(address);
_context.ExclusiveValueLow = value;
_context.ExclusiveValueHigh = 0;
return value;
}
public static V128 ReadVector128Exclusive(ulong address)
{
V128 value = _context.Memory.AtomicLoadInt128((long)address);
_context.ExclusiveAddress = GetMaskedExclusiveAddress(address);
_context.ExclusiveValueLow = value.GetUInt64(0);
_context.ExclusiveValueHigh = value.GetUInt64(1);
return value;
}
#endregion
#region "Write"
public static void WriteByte(ulong address, byte value)
{
GetMemoryManager().WriteByte((long)address, value);
}
public static void WriteUInt16(ulong address, ushort value)
{
GetMemoryManager().WriteUInt16((long)address, value);
}
public static void WriteUInt32(ulong address, uint value)
{
GetMemoryManager().WriteUInt32((long)address, value);
}
public static void WriteUInt64(ulong address, ulong value)
{
GetMemoryManager().WriteUInt64((long)address, value);
}
public static void WriteVector128(ulong address, V128 value)
{
GetMemoryManager().WriteVector128((long)address, value);
}
#endregion
#region "Write exclusive"
public static int WriteByteExclusive(ulong address, byte value)
{
bool success = _context.ExclusiveAddress == GetMaskedExclusiveAddress(address);
if (success)
{
success = _context.Memory.AtomicCompareExchangeByte(
(long)address,
(byte)_context.ExclusiveValueLow,
(byte)value);
if (success)
{
ClearExclusive();
}
}
return success ? 0 : 1;
}
public static int WriteUInt16Exclusive(ulong address, ushort value)
{
bool success = _context.ExclusiveAddress == GetMaskedExclusiveAddress(address);
if (success)
{
success = _context.Memory.AtomicCompareExchangeInt16(
(long)address,
(short)_context.ExclusiveValueLow,
(short)value);
if (success)
{
ClearExclusive();
}
}
return success ? 0 : 1;
}
public static int WriteUInt32Exclusive(ulong address, uint value)
{
bool success = _context.ExclusiveAddress == GetMaskedExclusiveAddress(address);
if (success)
{
success = _context.Memory.AtomicCompareExchangeInt32(
(long)address,
(int)_context.ExclusiveValueLow,
(int)value);
if (success)
{
ClearExclusive();
}
}
return success ? 0 : 1;
}
public static int WriteUInt64Exclusive(ulong address, ulong value)
{
bool success = _context.ExclusiveAddress == GetMaskedExclusiveAddress(address);
if (success)
{
success = _context.Memory.AtomicCompareExchangeInt64(
(long)address,
(long)_context.ExclusiveValueLow,
(long)value);
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);
success = _context.Memory.AtomicCompareExchangeInt128((long)address, expected, value);
if (success)
{
ClearExclusive();
}
}
return success ? 0 : 1;
}
#endregion
private static ulong GetMaskedExclusiveAddress(ulong address)
{
return address & ~((4UL << ErgSizeLog2) - 1);
}
public static void ClearExclusive()
{
_context.ExclusiveAddress = ulong.MaxValue;
}
public static void CheckSynchronization()
{
Statistics.PauseTimer();
GetContext().CheckInterrupt();
Statistics.ResumeTimer();
}
public static ExecutionContext GetContext()
{
return _context.Context;
}
public static MemoryManager GetMemoryManager()
{
return _context.Memory;
}
}
}
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