X87: Experimental support for RegExp lookbehind.

src/regexp/x87/regexp-macro-assembler-x87.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_REGEXP_X87_REGEXP_MACRO_ASSEMBLER_X87_H_
 #define V8_REGEXP_X87_REGEXP_MACRO_ASSEMBLER_X87_H_
 
 #include "src/macro-assembler.h"
 #include "src/regexp/regexp-macro-assembler.h"
 #include "src/x87/assembler-x87.h"
@@ skipping 15 matching lines @@
   virtual void CheckAtStart(Label* on_at_start);
   virtual void CheckCharacter(uint32_t c, Label* on_equal);
   virtual void CheckCharacterAfterAnd(uint32_t c,
                                       uint32_t mask,
                                       Label* on_equal);
   virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
   virtual void CheckCharacterLT(uc16 limit, Label* on_less);
   // A "greedy loop" is a loop that is both greedy and with a simple
   // body. It has a particularly simple implementation.
   virtual void CheckGreedyLoop(Label* on_tos_equals_current_position);
-  virtual void CheckNotAtStart(Label* on_not_at_start);
-  virtual void CheckNotBackReference(int start_reg, Label* on_no_match);
+  virtual void CheckNotAtStart(int cp_offset, Label* on_not_at_start);
+  virtual void CheckNotBackReference(int start_reg, bool read_backward,
+                                     Label* on_no_match);
   virtual void CheckNotBackReferenceIgnoreCase(int start_reg,
+                                               bool read_backward,
                                                Label* on_no_match);
   virtual void CheckNotCharacter(uint32_t c, Label* on_not_equal);
   virtual void CheckNotCharacterAfterAnd(uint32_t c,
                                          uint32_t mask,
                                          Label* on_not_equal);
   virtual void CheckNotCharacterAfterMinusAnd(uc16 c,
                                               uc16 minus,
                                               uc16 mask,
                                               Label* on_not_equal);
   virtual void CheckCharacterInRange(uc16 from,
@@ skipping 60 matching lines @@
   static const int kStackHighEnd = kNumOutputRegisters + kPointerSize;
   static const int kDirectCall = kStackHighEnd + kPointerSize;
   static const int kIsolate = kDirectCall + kPointerSize;
   // Below the frame pointer - local stack variables.
   // When adding local variables remember to push space for them in
   // the frame in GetCode.
   static const int kBackup_esi = kFramePointer - kPointerSize;
   static const int kBackup_edi = kBackup_esi - kPointerSize;
   static const int kBackup_ebx = kBackup_edi - kPointerSize;
   static const int kSuccessfulCaptures = kBackup_ebx - kPointerSize;
-  static const int kInputStartMinusOne = kSuccessfulCaptures - kPointerSize;
+  static const int kStringStartMinusOne = kSuccessfulCaptures - kPointerSize;
   // First register address. Following registers are below it on the stack.
-  static const int kRegisterZero = kInputStartMinusOne - kPointerSize;
+  static const int kRegisterZero = kStringStartMinusOne - kPointerSize;
 
   // Initial size of code buffer.
   static const size_t kRegExpCodeSize = 1024;
 
   // Load a number of characters at the given offset from the
   // current position, into the current-character register.
   void LoadCurrentCharacterUnchecked(int cp_offset, int character_count);
 
   // Check whether preemption has been requested.
   void CheckPreemption();
@@ skipping 61 matching lines @@
   Label exit_label_;
   Label check_preempt_label_;
   Label stack_overflow_label_;
 };
 #endif  // V8_INTERPRETED_REGEXP
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_REGEXP_X87_REGEXP_MACRO_ASSEMBLER_X87_H_