Changing string length field type from int to SMI. It will make it be a regu...

src/x64/macro-assembler-x64.h

 // 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 193 matching lines @@
 
   // Multiply a positive smi's integer value by a power of two.
   // Provides result as 64-bit integer value.
   void PositiveSmiTimesPowerOfTwoToInteger64(Register dst,
                                              Register src,
                                              int power);
 
   // Simple comparison of smis.
   void SmiCompare(Register dst, Register src);
   void SmiCompare(Register dst, Smi* src);
+  void SmiCompare(Register dst, const Operand& src);
   void SmiCompare(const Operand& dst, Register src);
   void SmiCompare(const Operand& dst, Smi* src);
   // Sets sign and zero flags depending on value of smi in register.
   void SmiTest(Register src);
 
   // Functions performing a check on a known or potential smi. Returns
   // a condition that is satisfied if the check is successful.
 
   // Is the value a tagged smi.
   Condition CheckSmi(Register src);
@@ skipping 70 matching lines @@
   void SmiAddConstant(Register dst, Register src, Smi* constant);
 
   // Add an integer constant to a tagged smi, giving a tagged smi as result,
   // or jumping to a label if the result cannot be represented by a smi.
   void SmiAddConstant(Register dst,
                       Register src,
                       Smi* constant,
                       Label* on_not_smi_result);
 
   // Subtract an integer constant from a tagged smi, giving a tagged smi as
-  // result. No testing on the result is done.
+  // result. No testing on the result is done. Sets the N and Z flags
+  // based on the value of the resulting integer.
   void SmiSubConstant(Register dst, Register src, Smi* constant);
 
   // Subtract an integer constant from a tagged smi, giving a tagged smi as
   // result, or jumping to a label if the result cannot be represented by a smi.
   void SmiSubConstant(Register dst,
                       Register src,
                       Smi* constant,
                       Label* on_not_smi_result);
 
   // Negating a smi can give a negative zero or too large positive value.
@@ skipping 11 matching lines @@
               Label* on_not_smi_result);
 
   // Subtracts smi values and return the result as a smi.
   // If dst is src1, then src1 will be destroyed, even if
   // the operation is unsuccessful.
   void SmiSub(Register dst,
               Register src1,
               Register src2,
               Label* on_not_smi_result);
 
+  void SmiSub(Register dst,
+              Register src1,
+              Operand const& src2,
+              Label* on_not_smi_result);
+
   // Multiplies smi values and return the result as a smi,
   // if possible.
   // If dst is src1, then src1 will be destroyed, even if
   // the operation is unsuccessful.
   void SmiMul(Register dst,
               Register src1,
               Register src2,
               Label* on_not_smi_result);
 
   // Divides one smi by another and returns the quotient.
@@ skipping 509 matching lines @@
   }                                                                       \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_MACRO_ASSEMBLER_X64_H_