Port of changes from r3842 (symbol table probing for two character strings) t...

src/arm/codegen-arm.h

 // Copyright 2010 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 546 matching lines @@
   void GenerateCopyCharactersLong(MacroAssembler* masm,
                                   Register dest,
                                   Register src,
                                   Register count,
                                   Register scratch1,
                                   Register scratch2,
                                   Register scratch3,
                                   Register scratch4,
                                   Register scratch5,
                                   int flags);
+
+
+  // Probe the symbol table for a two character string. If the string is
+  // not found by probing a jump to the label not_found is performed. This jump
+  // does not guarantee that the string is not in the symbol table. If the
+  // string is found the code falls through with the string in register r0.
+  // Contents of both c1 and c2 registers are modified. At the exit c1 is
+  // guaranteed to contain halfword with low and high bytes equal to
+  // initial contents of c1 and c2 respectively.
+  void GenerateTwoCharacterSymbolTableProbe(MacroAssembler* masm,
+                                            Register c1,
+                                            Register c2,
+                                            Register scratch1,
+                                            Register scratch2,
+                                            Register scratch3,
+                                            Register scratch4,
+                                            Register scratch5,
+                                            Label* not_found);
+
+  // Generate string hash.
+  void GenerateHashInit(MacroAssembler* masm,
+                        Register hash,
+                        Register character);
+
+  void GenerateHashAddCharacter(MacroAssembler* masm,
+                                Register hash,
+                                Register character);
+
+  void GenerateHashGetHash(MacroAssembler* masm,
+                           Register hash);
 };
 
 
 // Flag that indicates how to generate code for the stub StringAddStub.
 enum StringAddFlags {
   NO_STRING_ADD_FLAGS = 0,
   NO_STRING_CHECK_IN_STUB = 1 << 0  // Omit string check in stub.
 };
 
 
@@ skipping 45 matching lines @@
   Major MajorKey() { return StringCompare; }
   int MinorKey() { return 0; }
 
   void Generate(MacroAssembler* masm);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CODEGEN_ARM_H_