X64: Extract all smi operations into MacroAssembler macros.

src/x64/virtual-frame-x64.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 47 matching lines @@
   //   rsp: stack pointer, points to return address from this function.
   //   rbp: base pointer, points to previous JS, ArgumentsAdaptor, or
   //        Trampoline frame.
   //   rsi: context of this function call.
   //   rdi: pointer to this function object.
   Comment cmnt(masm(), "[ Enter JS frame");
 
 #ifdef DEBUG
   // Verify that rdi contains a JS function.  The following code
   // relies on rax being available for use.
-  __ testl(rdi, Immediate(kSmiTagMask));
-  __ Check(not_zero,
+  Condition not_smi = masm()->CheckNotSmi(rdi);
+  __ Check(not_smi,
            "VirtualFrame::Enter - rdi is not a function (smi check).");
   __ CmpObjectType(rdi, JS_FUNCTION_TYPE, rax);
   __ Check(equal,
            "VirtualFrame::Enter - rdi is not a function (map check).");
 #endif
 
   EmitPush(rbp);
 
   __ movq(rbp, rsp);
 
@@ skipping 972 matching lines @@
   // Grow the expression stack by handler size less one (the return
   // address is already pushed by a call instruction).
   Adjust(kHandlerSize - 1);
   __ PushTryHandler(IN_JAVASCRIPT, type);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal