MIPS: Fix white space matching in latin-1 strings wrt \u00a0.

src/mips/regexp-macro-assembler-mips.cc

 // Copyright 2012 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 523 matching lines @@
 
 
 bool RegExpMacroAssemblerMIPS::CheckSpecialCharacterClass(uc16 type,
                                                           Label* on_no_match) {
   // Range checks (c in min..max) are generally implemented by an unsigned
   // (c - min) <= (max - min) check.
   switch (type) {
   case 's':
     // Match space-characters.
     if (mode_ == ASCII) {
-      // ASCII space characters are '\t'..'\r' and ' '.
+      // One byte space characters are '\t'..'\r', ' ' and \u00a0.
       Label success;
       __ Branch(&success, eq, current_character(), Operand(' '));
       // Check range 0x09..0x0d.
       __ Subu(a0, current_character(), Operand('\t'));
-      BranchOrBacktrack(on_no_match, hi, a0, Operand('\r' - '\t'));
+      __ Branch(&success, ls, a0, Operand('\r' - '\t'));
+      // \u00a0 (NBSP).
+      BranchOrBacktrack(on_no_match, ne, a0, Operand(0x00a0 - '\t'));
       __ bind(&success);
       return true;
     }
     return false;
   case 'S':
-    // Match non-space characters.
-    if (mode_ == ASCII) {
-      // ASCII space characters are '\t'..'\r' and ' '.
-      BranchOrBacktrack(on_no_match, eq, current_character(), Operand(' '));
-      __ Subu(a0, current_character(), Operand('\t'));
-      BranchOrBacktrack(on_no_match, ls, a0, Operand('\r' - '\t'));
-      return true;
-    }
+    // The emitted code for generic character classes is good enough.
     return false;
   case 'd':
     // Match ASCII digits ('0'..'9').
     __ Subu(a0, current_character(), Operand('0'));
     BranchOrBacktrack(on_no_match, hi, a0, Operand('9' - '0'));
     return true;
   case 'D':
     // Match non ASCII-digits.
     __ Subu(a0, current_character(), Operand('0'));
     BranchOrBacktrack(on_no_match, ls, a0, Operand('9' - '0'));
@@ skipping 815 matching lines @@
 }
 
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS