Introduce Push and Pop register macro instructions for all platforms

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index ca13ca3955423c54f3bcc5136186b4adc9ba3600..ddce15083d5b8050a3f9d6013b0036588e657096 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -823,6 +823,8 @@ class MacroAssembler: public Assembler {
   void Drop(int stack_elements);
 
   void Call(Label* target) { call(target); }
+  void Push(Register src) { push(src); }
+  void Pop(Register dst) { pop(dst); }
   void PushReturnAddressFrom(Register src) { push(src); }
   void PopReturnAddressTo(Register dst) { pop(dst); }