Irregexp:...

src/bytecodes-irregexp.h

 // Copyright 2008 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 15 matching lines @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
 #ifndef V8_BYTECODES_IRREGEXP_H_
 #define V8_BYTECODES_IRREGEXP_H_
 
 namespace v8 { namespace internal {
 
 
 static const int BYTECODE_MASK = 0xff;
-static const unsigned int MAX_FIRST_ARG = 0xffffffu;
+// The first argument is packed in with the byte code in one word, but so it
+// has 24 bits, but it can be positive and negative so only use 23 bits for
+// positive values.
+static const unsigned int MAX_FIRST_ARG = 0x7fffffu;
 static const int BYTECODE_SHIFT = 8;
 
 #define BYTECODE_ITERATOR(V)                                                   \
 V(BREAK,              0, 4)   /* bc8                                        */ \
 V(PUSH_CP,            1, 4)   /* bc8 pad24                                  */ \
 V(PUSH_BT,            2, 8)   /* bc8 pad24 offset32                         */ \
 V(PUSH_REGISTER,      3, 4)   /* bc8 reg_idx24                              */ \
 V(SET_REGISTER_TO_CP, 4, 8)   /* bc8 reg_idx24 offset32                     */ \
 V(SET_CP_TO_REGISTER, 5, 4)   /* bc8 reg_idx24                              */ \
 V(SET_REGISTER_TO_SP, 6, 4)   /* bc8 reg_idx24                              */ \
@@ skipping 43 matching lines @@
 BYTECODE_ITERATOR(DECLARE_BYTECODES)
 #undef DECLARE_BYTECODES
 
 #define DECLARE_BYTECODE_LENGTH(name, code, length) \
   static const int BC_##name##_LENGTH = length;
 BYTECODE_ITERATOR(DECLARE_BYTECODE_LENGTH)
 #undef DECLARE_BYTECODE_LENGTH
 } }
 
 #endif  // V8_BYTECODES_IRREGEXP_H_