Implement JIT Arm64 backend (#4114)

* Implement JIT Arm64 backend

* PPTC version bump

* Address some feedback from Arm64 JIT PR

* Address even more PR feedback

* Remove unused IsPageAligned function

* Sync Qc flag before calls

* Fix comment and remove unused enum

* Address riperiperi PR feedback

* Delete Breakpoint IR instruction that was only implemented for Arm64

1 files changed, 49 insertions, 0 deletions

diff --git a/ARMeilleure/Translation/ArmEmitterContext.cs b/ARMeilleure/Translation/ArmEmitterContext.cs
index 48254de4..238f8508 100644
--- a/ARMeilleure/Translation/ArmEmitterContext.cs
+++ b/ARMeilleure/Translation/ArmEmitterContext.cs
@@ -39,6 +39,8 @@ namespace ARMeilleure.Translation
             }
         }
 
+        private bool _pendingQcFlagSync;
+
         public OpCode CurrOp { get; set; }
 
         public IMemoryManager Memory { get; }
@@ -81,6 +83,8 @@ namespace ARMeilleure.Translation
 
         public override Operand Call(MethodInfo info, params Operand[] callArgs)
         {
+            SyncQcFlag();
+
             if (!HasPtc)
             {
                 return base.Call(info, callArgs);
@@ -139,6 +143,51 @@ namespace ARMeilleure.Translation
             _optOpLastFlagSet = null;
         }
 
+        public void SetPendingQcFlagSync()
+        {
+            _pendingQcFlagSync = true;
+        }
+
+        public void SyncQcFlag()
+        {
+            if (_pendingQcFlagSync)
+            {
+                if (Optimizations.UseAdvSimd)
+                {
+                    Operand fpsr = AddIntrinsicInt(Intrinsic.Arm64MrsFpsr);
+
+                    uint qcFlagMask = (uint)FPSR.Qc;
+
+                    Operand qcClearLabel = Label();
+
+                    BranchIfFalse(qcClearLabel, BitwiseAnd(fpsr, Const(qcFlagMask)));
+
+                    AddIntrinsicNoRet(Intrinsic.Arm64MsrFpsr, Const(0));
+                    InstEmitHelper.SetFpFlag(this, FPState.QcFlag, Const(1));
+
+                    MarkLabel(qcClearLabel);
+                }
+
+                _pendingQcFlagSync = false;
+            }
+        }
+
+        public void ClearQcFlag()
+        {
+            if (Optimizations.UseAdvSimd)
+            {
+                AddIntrinsicNoRet(Intrinsic.Arm64MsrFpsr, Const(0));
+            }
+        }
+
+        public void ClearQcFlagIfModified()
+        {
+            if (_pendingQcFlagSync && Optimizations.UseAdvSimd)
+            {
+                AddIntrinsicNoRet(Intrinsic.Arm64MsrFpsr, Const(0));
+            }
+        }
+
         public Operand TryGetComparisonResult(Condition condition)
         {
             if (_optOpLastCompare == null || _optOpLastCompare != _optOpLastFlagSet)