1 files changed, 130 insertions, 0 deletions
diff --git a/ARMeilleure/State/ExecutionContext.cs b/ARMeilleure/State/ExecutionContext.cs
new file mode 100644
index 00000000..22cfcb69
--- /dev/null
+++ b/ARMeilleure/State/ExecutionContext.cs
@@ -0,0 +1,130 @@
+using System;
+using System.Diagnostics;
+
+namespace ARMeilleure.State
+{
+    public class ExecutionContext : IExecutionContext
+    {
+        private const int MinCountForCheck = 40000;
+
+        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);
+            }
+        }
+
+        public long TpidrEl0 { get; set; }
+        public long Tpidr    { get; set; }
+
+        public FPCR Fpcr { get; set; }
+        public FPSR Fpsr { get; set; }
+
+        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; set; }
+
+        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()
+        {
+            _nativeContext = new NativeContext();
+
+            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);
+
+        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 Dispose()
+        {
+            _nativeContext.Dispose();
+        }
+    }
+}
+\ No newline at end of file