RegExp: Add support for table-based character class

src/ia32/regexp-macro-assembler-ia32.cc

 // Copyright 2011 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 483 matching lines @@
 void RegExpMacroAssemblerIA32::CheckNotCharacter(uint32_t c,
                                                  Label* on_not_equal) {
   __ cmp(current_character(), c);
   BranchOrBacktrack(not_equal, on_not_equal);
 }
 
 
 void RegExpMacroAssemblerIA32::CheckCharacterAfterAnd(uint32_t c,
                                                       uint32_t mask,
                                                       Label* on_equal) {
-  __ mov(eax, current_character());
-  __ and_(eax, mask);
-  __ cmp(eax, c);
+  if (c == 0) {
+    __ test(current_character(), Immediate(mask));
+  } else {
+    __ mov(eax, current_character());
+    __ and_(eax, mask);
+    __ cmp(eax, c);
+  }
   BranchOrBacktrack(equal, on_equal);
 }
 
 
 void RegExpMacroAssemblerIA32::CheckNotCharacterAfterAnd(uint32_t c,
                                                          uint32_t mask,
                                                          Label* on_not_equal) {
-  __ mov(eax, current_character());
-  __ and_(eax, mask);
-  __ cmp(eax, c);
+  if (c == 0) {
+    __ test(current_character(), Immediate(mask));
+  } else {
+    __ mov(eax, current_character());
+    __ and_(eax, mask);
+    __ cmp(eax, c);
+  }
   BranchOrBacktrack(not_equal, on_not_equal);
 }
 
 
 void RegExpMacroAssemblerIA32::CheckNotCharacterAfterMinusAnd(
     uc16 c,
     uc16 minus,
     uc16 mask,
     Label* on_not_equal) {
   ASSERT(minus < String::kMaxUtf16CodeUnit);
   __ lea(eax, Operand(current_character(), -minus));
-  __ and_(eax, mask);
-  __ cmp(eax, c);
+  if (c == 0) {
+    __ test(eax, Immediate(mask));
+  } else {
+    __ and_(eax, mask);
+    __ cmp(eax, c);
+  }
   BranchOrBacktrack(not_equal, on_not_equal);
 }
 
 
+void RegExpMacroAssemblerIA32::CheckCharacterInRange(
+    uc16 from,
+    uc16 to,
+    Label* on_in_range) {
+  __ lea(eax, Operand(current_character(), -from));
+  __ cmp(eax, to - from);
+  BranchOrBacktrack(below_equal, on_in_range);
+}
+
+
+void RegExpMacroAssemblerIA32::CheckCharacterNotInRange(
+    uc16 from,
+    uc16 to,
+    Label* on_not_in_range) {
+  __ lea(eax, Operand(current_character(), -from));
+  __ cmp(eax, to - from);
+  BranchOrBacktrack(above, on_not_in_range);
+}
+
+
+void RegExpMacroAssemblerIA32::CheckBitInTable(
+    Handle<ByteArray> table,
+    Label* on_bit_set) {
+  __ mov(eax, Immediate(table));
+  Register index = current_character();
+  if (mode_ != ASCII || kTableMask != String::kMaxAsciiCharCode) {
+    __ mov(ebx, current_character());
+    __ and_(ebx, kTableSize - 1);
+    index = ebx;
+  }
+  __ cmpb(FieldOperand(eax, index, times_1, ByteArray::kHeaderSize), 0);
+  BranchOrBacktrack(not_equal, on_bit_set);
+}
+
+
 bool RegExpMacroAssemblerIA32::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 ' '.
       Label success;
@@ skipping 737 matching lines @@
 }
 
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32