[stubs] Split ToNumberStub into reusable subparts.

src/arm64/macro-assembler-arm64.h

 // Copyright 2013 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_ARM64_MACRO_ASSEMBLER_ARM64_H_
 #define V8_ARM64_MACRO_ASSEMBLER_ARM64_H_
 
 #include <vector>
 
 #include "src/arm64/assembler-arm64.h"
@@ skipping 969 matching lines @@
 
   // Abort execution if argument is not a string, enabled via --debug-code.
   void AssertString(Register object);
 
   // Abort execution if argument is not a positive or zero integer, enabled via
   // --debug-code.
   void AssertPositiveOrZero(Register value);
 
   // Abort execution if argument is not a number (heap number or smi).
   void AssertNumber(Register value);
+  void AssertNotNumber(Register value);
 
   void JumpIfHeapNumber(Register object, Label* on_heap_number,
                         SmiCheckType smi_check_type = DONT_DO_SMI_CHECK);
   void JumpIfNotHeapNumber(Register object, Label* on_not_heap_number,
                            SmiCheckType smi_check_type = DONT_DO_SMI_CHECK);
 
   // Sets the vs flag if the input is -0.0.
   void TestForMinusZero(DoubleRegister input);
 
   // Jump to label if the input double register contains -0.0.
@@ skipping 1268 matching lines @@
 #error "Unsupported option"
 #define CODE_COVERAGE_STRINGIFY(x) #x
 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 #endif  // V8_ARM64_MACRO_ASSEMBLER_ARM64_H_