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using ARMeilleure.Memory;
using System;
using System.Diagnostics;
namespace ARMeilleure.State
{
public class ExecutionContext
{
private const int MinCountForCheck = 4000;
private NativeContext _nativeContext;
internal IntPtr NativeContextPtr => _nativeContext.BasePtr;
private bool _interrupted;
private static Stopwatch _tickCounter;
private static double _hostTickFreq;
public uint CtrEl0 => 0x8444c004;
public uint DczidEl0 => 0x00000004;
public ulong CntfrqEl0 { get; set; }
public ulong CntpctEl0
{
get
{
double ticks = _tickCounter.ElapsedTicks * _hostTickFreq;
return (ulong)(ticks * CntfrqEl0);
}
}
// CNTVCT_EL0 = CNTPCT_EL0 - CNTVOFF_EL2
// Since EL2 isn't implemented, CNTVOFF_EL2 = 0
public ulong CntvctEl0 => CntpctEl0;
public static TimeSpan ElapsedTime => _tickCounter.Elapsed;
public static long ElapsedTicks => _tickCounter.ElapsedTicks;
public static double TickFrequency => _hostTickFreq;
public long TpidrEl0 { get; set; }
public long Tpidr { get; set; }
public FPCR Fpcr { get; set; }
public FPSR Fpsr { get; set; }
public FPCR StandardFpcrValue => (Fpcr & (FPCR.Ahp)) | FPCR.Dn | FPCR.Fz;
public bool IsAarch32 { get; set; }
internal ExecutionMode ExecutionMode
{
get
{
if (IsAarch32)
{
return GetPstateFlag(PState.TFlag)
? ExecutionMode.Aarch32Thumb
: ExecutionMode.Aarch32Arm;
}
else
{
return ExecutionMode.Aarch64;
}
}
}
public bool Running
{
get => _nativeContext.GetRunning();
private set => _nativeContext.SetRunning(value);
}
public event EventHandler<EventArgs> Interrupt;
public event EventHandler<InstExceptionEventArgs> Break;
public event EventHandler<InstExceptionEventArgs> SupervisorCall;
public event EventHandler<InstUndefinedEventArgs> Undefined;
static ExecutionContext()
{
_hostTickFreq = 1.0 / Stopwatch.Frequency;
_tickCounter = new Stopwatch();
_tickCounter.Start();
}
public ExecutionContext(IJitMemoryAllocator allocator)
{
_nativeContext = new NativeContext(allocator);
Running = true;
_nativeContext.SetCounter(MinCountForCheck);
}
public ulong GetX(int index) => _nativeContext.GetX(index);
public void SetX(int index, ulong value) => _nativeContext.SetX(index, value);
public V128 GetV(int index) => _nativeContext.GetV(index);
public void SetV(int index, V128 value) => _nativeContext.SetV(index, value);
public bool GetPstateFlag(PState flag) => _nativeContext.GetPstateFlag(flag);
public void SetPstateFlag(PState flag, bool value) => _nativeContext.SetPstateFlag(flag, value);
public bool GetFPstateFlag(FPState flag) => _nativeContext.GetFPStateFlag(flag);
public void SetFPstateFlag(FPState flag, bool value) => _nativeContext.SetFPStateFlag(flag, value);
internal void CheckInterrupt()
{
if (_interrupted)
{
_interrupted = false;
Interrupt?.Invoke(this, EventArgs.Empty);
}
_nativeContext.SetCounter(MinCountForCheck);
}
public void RequestInterrupt()
{
_interrupted = true;
}
internal void OnBreak(ulong address, int imm)
{
Break?.Invoke(this, new InstExceptionEventArgs(address, imm));
}
internal void OnSupervisorCall(ulong address, int imm)
{
SupervisorCall?.Invoke(this, new InstExceptionEventArgs(address, imm));
}
internal void OnUndefined(ulong address, int opCode)
{
Undefined?.Invoke(this, new InstUndefinedEventArgs(address, opCode));
}
public void StopRunning()
{
Running = false;
_nativeContext.SetCounter(0);
}
public static void SuspendCounter()
{
_tickCounter.Stop();
}
public static void ResumeCounter()
{
_tickCounter.Start();
}
public void Dispose()
{
_nativeContext.Dispose();
}
}
}
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