X87: [stubs] Split ToNumberStub into reusable subparts.

src/x87/macro-assembler-x87.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_X87_MACRO_ASSEMBLER_X87_H_
 #define V8_X87_MACRO_ASSEMBLER_X87_H_
 
 #include "src/assembler.h"
 #include "src/bailout-reason.h"
 #include "src/frames.h"
@@ skipping 513 matching lines @@
     if (shift < kSmiTagSize) {
       shl(reg, kSmiTagSize - shift);
     } else if (shift > kSmiTagSize) {
       sar(reg, shift - kSmiTagSize);
     }
     and_(reg, Immediate(mask));
   }
 
   // Abort execution if argument is not a number, enabled via --debug-code.
   void AssertNumber(Register object);
+  void AssertNotNumber(Register object);
 
   // Abort execution if argument is not a smi, enabled via --debug-code.
   void AssertSmi(Register object);
 
   // Abort execution if argument is a smi, enabled via --debug-code.
   void AssertNotSmi(Register object);
 
   // Abort execution if argument is not a string, enabled via --debug-code.
   void AssertString(Register object);
 
@@ skipping 478 matching lines @@
   }                                                                       \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_X87_MACRO_ASSEMBLER_X87_H_