ARM64: push/pop registers in stubs for safepoints

src/arm64/code-stubs-arm64.h

Index: src/arm64/code-stubs-arm64.h
diff --git a/src/arm64/code-stubs-arm64.h b/src/arm64/code-stubs-arm64.h
index e9862294a0a618c530f40a04bc653b2149623461..7e09ffa57c1817f61f53a8216bb7b37a883a950a 100644
--- a/src/arm64/code-stubs-arm64.h
+++ b/src/arm64/code-stubs-arm64.h
@@ -77,6 +77,37 @@ class StringHelper : public AllStatic {
 };
 
 
+class StoreRegistersStateStub: public PlatformCodeStub {
+ public:
+  explicit StoreRegistersStateStub(SaveFPRegsMode with_fp)
+      : save_doubles_(with_fp) {}
+
+  static Register to_be_pushed_lr() { return ip0; }
+  static void GenerateAheadOfTime(Isolate* isolate);
+ private:
+  Major MajorKey() { return StoreRegistersState; }
+  int MinorKey() { return (save_doubles_ == kSaveFPRegs) ? 1 : 0; }
+  SaveFPRegsMode save_doubles_;
+
+  void Generate(MacroAssembler* masm);
+};
+
+
+class RestoreRegistersStateStub: public PlatformCodeStub {
+ public:
+  explicit RestoreRegistersStateStub(SaveFPRegsMode with_fp)
+      : save_doubles_(with_fp) {}
+
+  static void GenerateAheadOfTime(Isolate* isolate);
+ private:
+  Major MajorKey() { return RestoreRegistersState; }
+  int MinorKey() { return (save_doubles_ == kSaveFPRegs) ? 1 : 0; }
+  SaveFPRegsMode save_doubles_;
+
+  void Generate(MacroAssembler* masm);
+};
+
+
 class RecordWriteStub: public PlatformCodeStub {
  public:
   // Stub to record the write of 'value' at 'address' in 'object'.