Move regexp implementation into its own folder.

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

Index: src/ppc/regexp-macro-assembler-ppc.cc
diff --git a/src/ppc/regexp-macro-assembler-ppc.cc b/src/ppc/regexp-macro-assembler-ppc.cc
deleted file mode 100644
index 9e4e9e5c73a8f7b8bfae8e2dd28956710526147c..0000000000000000000000000000000000000000
--- a/src/ppc/regexp-macro-assembler-ppc.cc
+++ /dev/null
@@ -1,1254 +0,0 @@
-// Copyright 2014 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.
-
-#include "src/v8.h"
-
-#if V8_TARGET_ARCH_PPC
-
-#include "src/base/bits.h"
-#include "src/code-stubs.h"
-#include "src/cpu-profiler.h"
-#include "src/log.h"
-#include "src/macro-assembler.h"
-#include "src/regexp-macro-assembler.h"
-#include "src/regexp-stack.h"
-#include "src/unicode.h"
-
-#include "src/ppc/regexp-macro-assembler-ppc.h"
-
-namespace v8 {
-namespace internal {
-
-#ifndef V8_INTERPRETED_REGEXP
-/*
- * This assembler uses the following register assignment convention
- * - r25: Temporarily stores the index of capture start after a matching pass
- *        for a global regexp.
- * - r26: Pointer to current code object (Code*) including heap object tag.
- * - r27: Current position in input, as negative offset from end of string.
- *        Please notice that this is the byte offset, not the character offset!
- * - r28: Currently loaded character. Must be loaded using
- *        LoadCurrentCharacter before using any of the dispatch methods.
- * - r29: Points to tip of backtrack stack
- * - r30: End of input (points to byte after last character in input).
- * - r31: Frame pointer. Used to access arguments, local variables and
- *         RegExp registers.
- * - r12: IP register, used by assembler. Very volatile.
- * - r1/sp : Points to tip of C stack.
- *
- * The remaining registers are free for computations.
- * Each call to a public method should retain this convention.
- *
- * The stack will have the following structure:
- *  - fp[44]  Isolate* isolate   (address of the current isolate)
- *  - fp[40]  secondary link/return address used by native call.
- *  - fp[36]  lr save area (currently unused)
- *  - fp[32]  backchain    (currently unused)
- *  --- sp when called ---
- *  - fp[28]  return address     (lr).
- *  - fp[24]  old frame pointer  (r31).
- *  - fp[0..20]  backup of registers r25..r30
- *  --- frame pointer ----
- *  - fp[-4]  direct_call        (if 1, direct call from JavaScript code,
- *                                if 0, call through the runtime system).
- *  - fp[-8]  stack_area_base    (high end of the memory area to use as
- *                                backtracking stack).
- *  - fp[-12] capture array size (may fit multiple sets of matches)
- *  - fp[-16] int* capture_array (int[num_saved_registers_], for output).
- *  - fp[-20] end of input       (address of end of string).
- *  - fp[-24] start of input     (address of first character in string).
- *  - fp[-28] start index        (character index of start).
- *  - fp[-32] void* input_string (location of a handle containing the string).
- *  - fp[-36] success counter    (only for global regexps to count matches).
- *  - fp[-40] Offset of location before start of input (effectively character
- *            position -1). Used to initialize capture registers to a
- *            non-position.
- *  - fp[-44] At start (if 1, we are starting at the start of the
- *    string, otherwise 0)
- *  - fp[-48] register 0         (Only positions must be stored in the first
- *  -         register 1          num_saved_registers_ registers)
- *  -         ...
- *  -         register num_registers-1
- *  --- sp ---
- *
- * The first num_saved_registers_ registers are initialized to point to
- * "character -1" in the string (i.e., char_size() bytes before the first
- * character of the string). The remaining registers start out as garbage.
- *
- * The data up to the return address must be placed there by the calling
- * code and the remaining arguments are passed in registers, e.g. by calling the
- * code entry as cast to a function with the signature:
- * int (*match)(String* input_string,
- *              int start_index,
- *              Address start,
- *              Address end,
- *              int* capture_output_array,
- *              byte* stack_area_base,
- *              Address secondary_return_address,  // Only used by native call.
- *              bool direct_call = false)
- * The call is performed by NativeRegExpMacroAssembler::Execute()
- * (in regexp-macro-assembler.cc) via the CALL_GENERATED_REGEXP_CODE macro
- * in ppc/simulator-ppc.h.
- * When calling as a non-direct call (i.e., from C++ code), the return address
- * area is overwritten with the LR register by the RegExp code. When doing a
- * direct call from generated code, the return address is placed there by
- * the calling code, as in a normal exit frame.
- */
-
-#define __ ACCESS_MASM(masm_)
-
-RegExpMacroAssemblerPPC::RegExpMacroAssemblerPPC(Isolate* isolate, Zone* zone,
-                                                 Mode mode,
-                                                 int registers_to_save)
-    : NativeRegExpMacroAssembler(isolate, zone),
-      masm_(new MacroAssembler(isolate, NULL, kRegExpCodeSize)),
-      mode_(mode),
-      num_registers_(registers_to_save),
-      num_saved_registers_(registers_to_save),
-      entry_label_(),
-      start_label_(),
-      success_label_(),
-      backtrack_label_(),
-      exit_label_(),
-      internal_failure_label_() {
-  DCHECK_EQ(0, registers_to_save % 2);
-
-// Called from C
-  __ function_descriptor();
-
-  __ b(&entry_label_);  // We'll write the entry code later.
-  // If the code gets too big or corrupted, an internal exception will be
-  // raised, and we will exit right away.
-  __ bind(&internal_failure_label_);
-  __ li(r3, Operand(FAILURE));
-  __ Ret();
-  __ bind(&start_label_);  // And then continue from here.
-}
-
-
-RegExpMacroAssemblerPPC::~RegExpMacroAssemblerPPC() {
-  delete masm_;
-  // Unuse labels in case we throw away the assembler without calling GetCode.
-  entry_label_.Unuse();
-  start_label_.Unuse();
-  success_label_.Unuse();
-  backtrack_label_.Unuse();
-  exit_label_.Unuse();
-  check_preempt_label_.Unuse();
-  stack_overflow_label_.Unuse();
-  internal_failure_label_.Unuse();
-}
-
-
-int RegExpMacroAssemblerPPC::stack_limit_slack() {
-  return RegExpStack::kStackLimitSlack;
-}
-
-
-void RegExpMacroAssemblerPPC::AdvanceCurrentPosition(int by) {
-  if (by != 0) {
-    __ addi(current_input_offset(), current_input_offset(),
-            Operand(by * char_size()));
-  }
-}
-
-
-void RegExpMacroAssemblerPPC::AdvanceRegister(int reg, int by) {
-  DCHECK(reg >= 0);
-  DCHECK(reg < num_registers_);
-  if (by != 0) {
-    __ LoadP(r3, register_location(reg), r0);
-    __ mov(r0, Operand(by));
-    __ add(r3, r3, r0);
-    __ StoreP(r3, register_location(reg), r0);
-  }
-}
-
-
-void RegExpMacroAssemblerPPC::Backtrack() {
-  CheckPreemption();
-  // Pop Code* offset from backtrack stack, add Code* and jump to location.
-  Pop(r3);
-  __ add(r3, r3, code_pointer());
-  __ Jump(r3);
-}
-
-
-void RegExpMacroAssemblerPPC::Bind(Label* label) { __ bind(label); }
-
-
-void RegExpMacroAssemblerPPC::CheckCharacter(uint32_t c, Label* on_equal) {
-  __ Cmpli(current_character(), Operand(c), r0);
-  BranchOrBacktrack(eq, on_equal);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckCharacterGT(uc16 limit, Label* on_greater) {
-  __ Cmpli(current_character(), Operand(limit), r0);
-  BranchOrBacktrack(gt, on_greater);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckAtStart(Label* on_at_start) {
-  Label not_at_start;
-  // Did we start the match at the start of the string at all?
-  __ LoadP(r3, MemOperand(frame_pointer(), kStartIndex));
-  __ cmpi(r3, Operand::Zero());
-  BranchOrBacktrack(ne, &not_at_start);
-
-  // If we did, are we still at the start of the input?
-  __ LoadP(r4, MemOperand(frame_pointer(), kInputStart));
-  __ mr(r0, current_input_offset());
-  __ add(r3, end_of_input_address(), r0);
-  __ cmp(r4, r3);
-  BranchOrBacktrack(eq, on_at_start);
-  __ bind(&not_at_start);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckNotAtStart(Label* on_not_at_start) {
-  // Did we start the match at the start of the string at all?
-  __ LoadP(r3, MemOperand(frame_pointer(), kStartIndex));
-  __ cmpi(r3, Operand::Zero());
-  BranchOrBacktrack(ne, on_not_at_start);
-  // If we did, are we still at the start of the input?
-  __ LoadP(r4, MemOperand(frame_pointer(), kInputStart));
-  __ add(r3, end_of_input_address(), current_input_offset());
-  __ cmp(r3, r4);
-  BranchOrBacktrack(ne, on_not_at_start);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckCharacterLT(uc16 limit, Label* on_less) {
-  __ Cmpli(current_character(), Operand(limit), r0);
-  BranchOrBacktrack(lt, on_less);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckGreedyLoop(Label* on_equal) {
-  Label backtrack_non_equal;
-  __ LoadP(r3, MemOperand(backtrack_stackpointer(), 0));
-  __ cmp(current_input_offset(), r3);
-  __ bne(&backtrack_non_equal);
-  __ addi(backtrack_stackpointer(), backtrack_stackpointer(),
-          Operand(kPointerSize));
-
-  __ bind(&backtrack_non_equal);
-  BranchOrBacktrack(eq, on_equal);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckNotBackReferenceIgnoreCase(
-    int start_reg, Label* on_no_match) {
-  Label fallthrough;
-  __ LoadP(r3, register_location(start_reg), r0);  // Index of start of capture
-  __ LoadP(r4, register_location(start_reg + 1), r0);  // Index of end
-  __ sub(r4, r4, r3, LeaveOE, SetRC);                  // Length of capture.
-
-  // If length is zero, either the capture is empty or it is not participating.
-  // In either case succeed immediately.
-  __ beq(&fallthrough, cr0);
-
-  // Check that there are enough characters left in the input.
-  __ add(r0, r4, current_input_offset(), LeaveOE, SetRC);
-  //  __ cmn(r1, Operand(current_input_offset()));
-  BranchOrBacktrack(gt, on_no_match, cr0);
-
-  if (mode_ == LATIN1) {
-    Label success;
-    Label fail;
-    Label loop_check;
-
-    // r3 - offset of start of capture
-    // r4 - length of capture
-    __ add(r3, r3, end_of_input_address());
-    __ add(r5, end_of_input_address(), current_input_offset());
-    __ add(r4, r3, r4);
-
-    // r3 - Address of start of capture.
-    // r4 - Address of end of capture
-    // r5 - Address of current input position.
-
-    Label loop;
-    __ bind(&loop);
-    __ lbz(r6, MemOperand(r3));
-    __ addi(r3, r3, Operand(char_size()));
-    __ lbz(r25, MemOperand(r5));
-    __ addi(r5, r5, Operand(char_size()));
-    __ cmp(r25, r6);
-    __ beq(&loop_check);
-
-    // Mismatch, try case-insensitive match (converting letters to lower-case).
-    __ ori(r6, r6, Operand(0x20));  // Convert capture character to lower-case.
-    __ ori(r25, r25, Operand(0x20));  // Also convert input character.
-    __ cmp(r25, r6);
-    __ bne(&fail);
-    __ subi(r6, r6, Operand('a'));
-    __ cmpli(r6, Operand('z' - 'a'));  // Is r6 a lowercase letter?
-    __ ble(&loop_check);               // In range 'a'-'z'.
-    // Latin-1: Check for values in range [224,254] but not 247.
-    __ subi(r6, r6, Operand(224 - 'a'));
-    __ cmpli(r6, Operand(254 - 224));
-    __ bgt(&fail);                    // Weren't Latin-1 letters.
-    __ cmpi(r6, Operand(247 - 224));  // Check for 247.
-    __ beq(&fail);
-
-    __ bind(&loop_check);
-    __ cmp(r3, r4);
-    __ blt(&loop);
-    __ b(&success);
-
-    __ bind(&fail);
-    BranchOrBacktrack(al, on_no_match);
-
-    __ bind(&success);
-    // Compute new value of character position after the matched part.
-    __ sub(current_input_offset(), r5, end_of_input_address());
-  } else {
-    DCHECK(mode_ == UC16);
-    int argument_count = 4;
-    __ PrepareCallCFunction(argument_count, r5);
-
-    // r3 - offset of start of capture
-    // r4 - length of capture
-
-    // Put arguments into arguments registers.
-    // Parameters are
-    //   r3: Address byte_offset1 - Address captured substring's start.
-    //   r4: Address byte_offset2 - Address of current character position.
-    //   r5: size_t byte_length - length of capture in bytes(!)
-    //   r6: Isolate* isolate
-
-    // Address of start of capture.
-    __ add(r3, r3, end_of_input_address());
-    // Length of capture.
-    __ mr(r5, r4);
-    // Save length in callee-save register for use on return.
-    __ mr(r25, r4);
-    // Address of current input position.
-    __ add(r4, current_input_offset(), end_of_input_address());
-    // Isolate.
-    __ mov(r6, Operand(ExternalReference::isolate_address(isolate())));
-
-    {
-      AllowExternalCallThatCantCauseGC scope(masm_);
-      ExternalReference function =
-          ExternalReference::re_case_insensitive_compare_uc16(isolate());
-      __ CallCFunction(function, argument_count);
-    }
-
-    // Check if function returned non-zero for success or zero for failure.
-    __ cmpi(r3, Operand::Zero());
-    BranchOrBacktrack(eq, on_no_match);
-    // On success, increment position by length of capture.
-    __ add(current_input_offset(), current_input_offset(), r25);
-  }
-
-  __ bind(&fallthrough);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckNotBackReference(int start_reg,
-                                                    Label* on_no_match) {
-  Label fallthrough;
-  Label success;
-
-  // Find length of back-referenced capture.
-  __ LoadP(r3, register_location(start_reg), r0);
-  __ LoadP(r4, register_location(start_reg + 1), r0);
-  __ sub(r4, r4, r3, LeaveOE, SetRC);  // Length to check.
-  // Succeed on empty capture (including no capture).
-  __ beq(&fallthrough, cr0);
-
-  // Check that there are enough characters left in the input.
-  __ add(r0, r4, current_input_offset(), LeaveOE, SetRC);
-  BranchOrBacktrack(gt, on_no_match, cr0);
-
-  // Compute pointers to match string and capture string
-  __ add(r3, r3, end_of_input_address());
-  __ add(r5, end_of_input_address(), current_input_offset());
-  __ add(r4, r4, r3);
-
-  Label loop;
-  __ bind(&loop);
-  if (mode_ == LATIN1) {
-    __ lbz(r6, MemOperand(r3));
-    __ addi(r3, r3, Operand(char_size()));
-    __ lbz(r25, MemOperand(r5));
-    __ addi(r5, r5, Operand(char_size()));
-  } else {
-    DCHECK(mode_ == UC16);
-    __ lhz(r6, MemOperand(r3));
-    __ addi(r3, r3, Operand(char_size()));
-    __ lhz(r25, MemOperand(r5));
-    __ addi(r5, r5, Operand(char_size()));
-  }
-  __ cmp(r6, r25);
-  BranchOrBacktrack(ne, on_no_match);
-  __ cmp(r3, r4);
-  __ blt(&loop);
-
-  // Move current character position to position after match.
-  __ sub(current_input_offset(), r5, end_of_input_address());
-  __ bind(&fallthrough);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckNotCharacter(unsigned c,
-                                                Label* on_not_equal) {
-  __ Cmpli(current_character(), Operand(c), r0);
-  BranchOrBacktrack(ne, on_not_equal);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckCharacterAfterAnd(uint32_t c, uint32_t mask,
-                                                     Label* on_equal) {
-  __ mov(r0, Operand(mask));
-  if (c == 0) {
-    __ and_(r3, current_character(), r0, SetRC);
-  } else {
-    __ and_(r3, current_character(), r0);
-    __ Cmpli(r3, Operand(c), r0, cr0);
-  }
-  BranchOrBacktrack(eq, on_equal, cr0);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckNotCharacterAfterAnd(unsigned c,
-                                                        unsigned mask,
-                                                        Label* on_not_equal) {
-  __ mov(r0, Operand(mask));
-  if (c == 0) {
-    __ and_(r3, current_character(), r0, SetRC);
-  } else {
-    __ and_(r3, current_character(), r0);
-    __ Cmpli(r3, Operand(c), r0, cr0);
-  }
-  BranchOrBacktrack(ne, on_not_equal, cr0);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckNotCharacterAfterMinusAnd(
-    uc16 c, uc16 minus, uc16 mask, Label* on_not_equal) {
-  DCHECK(minus < String::kMaxUtf16CodeUnit);
-  __ subi(r3, current_character(), Operand(minus));
-  __ mov(r0, Operand(mask));
-  __ and_(r3, r3, r0);
-  __ Cmpli(r3, Operand(c), r0);
-  BranchOrBacktrack(ne, on_not_equal);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckCharacterInRange(uc16 from, uc16 to,
-                                                    Label* on_in_range) {
-  __ mov(r0, Operand(from));
-  __ sub(r3, current_character(), r0);
-  __ Cmpli(r3, Operand(to - from), r0);
-  BranchOrBacktrack(le, on_in_range);  // Unsigned lower-or-same condition.
-}
-
-
-void RegExpMacroAssemblerPPC::CheckCharacterNotInRange(uc16 from, uc16 to,
-                                                       Label* on_not_in_range) {
-  __ mov(r0, Operand(from));
-  __ sub(r3, current_character(), r0);
-  __ Cmpli(r3, Operand(to - from), r0);
-  BranchOrBacktrack(gt, on_not_in_range);  // Unsigned higher condition.
-}
-
-
-void RegExpMacroAssemblerPPC::CheckBitInTable(Handle<ByteArray> table,
-                                              Label* on_bit_set) {
-  __ mov(r3, Operand(table));
-  if (mode_ != LATIN1 || kTableMask != String::kMaxOneByteCharCode) {
-    __ andi(r4, current_character(), Operand(kTableSize - 1));
-    __ addi(r4, r4, Operand(ByteArray::kHeaderSize - kHeapObjectTag));
-  } else {
-    __ addi(r4, current_character(),
-            Operand(ByteArray::kHeaderSize - kHeapObjectTag));
-  }
-  __ lbzx(r3, MemOperand(r3, r4));
-  __ cmpi(r3, Operand::Zero());
-  BranchOrBacktrack(ne, on_bit_set);
-}
-
-
-bool RegExpMacroAssemblerPPC::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_ == LATIN1) {
-        // One byte space characters are '\t'..'\r', ' ' and \u00a0.
-        Label success;
-        __ cmpi(current_character(), Operand(' '));
-        __ beq(&success);
-        // Check range 0x09..0x0d
-        __ subi(r3, current_character(), Operand('\t'));
-        __ cmpli(r3, Operand('\r' - '\t'));
-        __ ble(&success);
-        // \u00a0 (NBSP).
-        __ cmpi(r3, Operand(0x00a0 - '\t'));
-        BranchOrBacktrack(ne, on_no_match);
-        __ bind(&success);
-        return true;
-      }
-      return false;
-    case 'S':
-      // The emitted code for generic character classes is good enough.
-      return false;
-    case 'd':
-      // Match ASCII digits ('0'..'9')
-      __ subi(r3, current_character(), Operand('0'));
-      __ cmpli(r3, Operand('9' - '0'));
-      BranchOrBacktrack(gt, on_no_match);
-      return true;
-    case 'D':
-      // Match non ASCII-digits
-      __ subi(r3, current_character(), Operand('0'));
-      __ cmpli(r3, Operand('9' - '0'));
-      BranchOrBacktrack(le, on_no_match);
-      return true;
-    case '.': {
-      // Match non-newlines (not 0x0a('\n'), 0x0d('\r'), 0x2028 and 0x2029)
-      __ xori(r3, current_character(), Operand(0x01));
-      // See if current character is '\n'^1 or '\r'^1, i.e., 0x0b or 0x0c
-      __ subi(r3, r3, Operand(0x0b));
-      __ cmpli(r3, Operand(0x0c - 0x0b));
-      BranchOrBacktrack(le, on_no_match);
-      if (mode_ == UC16) {
-        // Compare original value to 0x2028 and 0x2029, using the already
-        // computed (current_char ^ 0x01 - 0x0b). I.e., check for
-        // 0x201d (0x2028 - 0x0b) or 0x201e.
-        __ subi(r3, r3, Operand(0x2028 - 0x0b));
-        __ cmpli(r3, Operand(1));
-        BranchOrBacktrack(le, on_no_match);
-      }
-      return true;
-    }
-    case 'n': {
-      // Match newlines (0x0a('\n'), 0x0d('\r'), 0x2028 and 0x2029)
-      __ xori(r3, current_character(), Operand(0x01));
-      // See if current character is '\n'^1 or '\r'^1, i.e., 0x0b or 0x0c
-      __ subi(r3, r3, Operand(0x0b));
-      __ cmpli(r3, Operand(0x0c - 0x0b));
-      if (mode_ == LATIN1) {
-        BranchOrBacktrack(gt, on_no_match);
-      } else {
-        Label done;
-        __ ble(&done);
-        // Compare original value to 0x2028 and 0x2029, using the already
-        // computed (current_char ^ 0x01 - 0x0b). I.e., check for
-        // 0x201d (0x2028 - 0x0b) or 0x201e.
-        __ subi(r3, r3, Operand(0x2028 - 0x0b));
-        __ cmpli(r3, Operand(1));
-        BranchOrBacktrack(gt, on_no_match);
-        __ bind(&done);
-      }
-      return true;
-    }
-    case 'w': {
-      if (mode_ != LATIN1) {
-        // Table is 256 entries, so all Latin1 characters can be tested.
-        __ cmpi(current_character(), Operand('z'));
-        BranchOrBacktrack(gt, on_no_match);
-      }
-      ExternalReference map = ExternalReference::re_word_character_map();
-      __ mov(r3, Operand(map));
-      __ lbzx(r3, MemOperand(r3, current_character()));
-      __ cmpli(r3, Operand::Zero());
-      BranchOrBacktrack(eq, on_no_match);
-      return true;
-    }
-    case 'W': {
-      Label done;
-      if (mode_ != LATIN1) {
-        // Table is 256 entries, so all Latin1 characters can be tested.
-        __ cmpli(current_character(), Operand('z'));
-        __ bgt(&done);
-      }
-      ExternalReference map = ExternalReference::re_word_character_map();
-      __ mov(r3, Operand(map));
-      __ lbzx(r3, MemOperand(r3, current_character()));
-      __ cmpli(r3, Operand::Zero());
-      BranchOrBacktrack(ne, on_no_match);
-      if (mode_ != LATIN1) {
-        __ bind(&done);
-      }
-      return true;
-    }
-    case '*':
-      // Match any character.
-      return true;
-    // No custom implementation (yet): s(UC16), S(UC16).
-    default:
-      return false;
-  }
-}
-
-
-void RegExpMacroAssemblerPPC::Fail() {
-  __ li(r3, Operand(FAILURE));
-  __ b(&exit_label_);
-}
-
-
-Handle<HeapObject> RegExpMacroAssemblerPPC::GetCode(Handle<String> source) {
-  Label return_r3;
-
-  if (masm_->has_exception()) {
-    // If the code gets corrupted due to long regular expressions and lack of
-    // space on trampolines, an internal exception flag is set. If this case
-    // is detected, we will jump into exit sequence right away.
-    __ bind_to(&entry_label_, internal_failure_label_.pos());
-  } else {
-    // Finalize code - write the entry point code now we know how many
-    // registers we need.
-
-    // Entry code:
-    __ bind(&entry_label_);
-
-    // Tell the system that we have a stack frame.  Because the type
-    // is MANUAL, no is generated.
-    FrameScope scope(masm_, StackFrame::MANUAL);
-
-    // Ensure register assigments are consistent with callee save mask
-    DCHECK(r25.bit() & kRegExpCalleeSaved);
-    DCHECK(code_pointer().bit() & kRegExpCalleeSaved);
-    DCHECK(current_input_offset().bit() & kRegExpCalleeSaved);
-    DCHECK(current_character().bit() & kRegExpCalleeSaved);
-    DCHECK(backtrack_stackpointer().bit() & kRegExpCalleeSaved);
-    DCHECK(end_of_input_address().bit() & kRegExpCalleeSaved);
-    DCHECK(frame_pointer().bit() & kRegExpCalleeSaved);
-
-    // Actually emit code to start a new stack frame.
-    // Push arguments
-    // Save callee-save registers.
-    // Start new stack frame.
-    // Store link register in existing stack-cell.
-    // Order here should correspond to order of offset constants in header file.
-    RegList registers_to_retain = kRegExpCalleeSaved;
-    RegList argument_registers = r3.bit() | r4.bit() | r5.bit() | r6.bit() |
-                                 r7.bit() | r8.bit() | r9.bit() | r10.bit();
-    __ mflr(r0);
-    __ push(r0);
-    __ MultiPush(argument_registers | registers_to_retain);
-    // Set frame pointer in space for it if this is not a direct call
-    // from generated code.
-    __ addi(frame_pointer(), sp, Operand(8 * kPointerSize));
-    __ li(r3, Operand::Zero());
-    __ push(r3);  // Make room for success counter and initialize it to 0.
-    __ push(r3);  // Make room for "position - 1" constant (value is irrelevant)
-    // Check if we have space on the stack for registers.
-    Label stack_limit_hit;
-    Label stack_ok;
-
-    ExternalReference stack_limit =
-        ExternalReference::address_of_stack_limit(isolate());
-    __ mov(r3, Operand(stack_limit));
-    __ LoadP(r3, MemOperand(r3));
-    __ sub(r3, sp, r3, LeaveOE, SetRC);
-    // Handle it if the stack pointer is already below the stack limit.
-    __ ble(&stack_limit_hit, cr0);
-    // Check if there is room for the variable number of registers above
-    // the stack limit.
-    __ Cmpli(r3, Operand(num_registers_ * kPointerSize), r0);
-    __ bge(&stack_ok);
-    // Exit with OutOfMemory exception. There is not enough space on the stack
-    // for our working registers.
-    __ li(r3, Operand(EXCEPTION));
-    __ b(&return_r3);
-
-    __ bind(&stack_limit_hit);
-    CallCheckStackGuardState(r3);
-    __ cmpi(r3, Operand::Zero());
-    // If returned value is non-zero, we exit with the returned value as result.
-    __ bne(&return_r3);
-
-    __ bind(&stack_ok);
-
-    // Allocate space on stack for registers.
-    __ Add(sp, sp, -num_registers_ * kPointerSize, r0);
-    // Load string end.
-    __ LoadP(end_of_input_address(), MemOperand(frame_pointer(), kInputEnd));
-    // Load input start.
-    __ LoadP(r3, MemOperand(frame_pointer(), kInputStart));
-    // Find negative length (offset of start relative to end).
-    __ sub(current_input_offset(), r3, end_of_input_address());
-    // Set r3 to address of char before start of the input string
-    // (effectively string position -1).
-    __ LoadP(r4, MemOperand(frame_pointer(), kStartIndex));
-    __ subi(r3, current_input_offset(), Operand(char_size()));
-    if (mode_ == UC16) {
-      __ ShiftLeftImm(r0, r4, Operand(1));
-      __ sub(r3, r3, r0);
-    } else {
-      __ sub(r3, r3, r4);
-    }
-    // Store this value in a local variable, for use when clearing
-    // position registers.
-    __ StoreP(r3, MemOperand(frame_pointer(), kInputStartMinusOne));
-
-    // Initialize code pointer register
-    __ mov(code_pointer(), Operand(masm_->CodeObject()));
-
-    Label load_char_start_regexp, start_regexp;
-    // Load newline if index is at start, previous character otherwise.
-    __ cmpi(r4, Operand::Zero());
-    __ bne(&load_char_start_regexp);
-    __ li(current_character(), Operand('\n'));
-    __ b(&start_regexp);
-
-    // Global regexp restarts matching here.
-    __ bind(&load_char_start_regexp);
-    // Load previous char as initial value of current character register.
-    LoadCurrentCharacterUnchecked(-1, 1);
-    __ bind(&start_regexp);
-
-    // Initialize on-stack registers.
-    if (num_saved_registers_ > 0) {  // Always is, if generated from a regexp.
-      // Fill saved registers with initial value = start offset - 1
-      if (num_saved_registers_ > 8) {
-        // One slot beyond address of register 0.
-        __ addi(r4, frame_pointer(), Operand(kRegisterZero + kPointerSize));
-        __ li(r5, Operand(num_saved_registers_));
-        __ mtctr(r5);
-        Label init_loop;
-        __ bind(&init_loop);
-        __ StorePU(r3, MemOperand(r4, -kPointerSize));
-        __ bdnz(&init_loop);
-      } else {
-        for (int i = 0; i < num_saved_registers_; i++) {
-          __ StoreP(r3, register_location(i), r0);
-        }
-      }
-    }
-
-    // Initialize backtrack stack pointer.
-    __ LoadP(backtrack_stackpointer(),
-             MemOperand(frame_pointer(), kStackHighEnd));
-
-    __ b(&start_label_);
-
-    // Exit code:
-    if (success_label_.is_linked()) {
-      // Save captures when successful.
-      __ bind(&success_label_);
-      if (num_saved_registers_ > 0) {
-        // copy captures to output
-        __ LoadP(r4, MemOperand(frame_pointer(), kInputStart));
-        __ LoadP(r3, MemOperand(frame_pointer(), kRegisterOutput));
-        __ LoadP(r5, MemOperand(frame_pointer(), kStartIndex));
-        __ sub(r4, end_of_input_address(), r4);
-        // r4 is length of input in bytes.
-        if (mode_ == UC16) {
-          __ ShiftRightImm(r4, r4, Operand(1));
-        }
-        // r4 is length of input in characters.
-        __ add(r4, r4, r5);
-        // r4 is length of string in characters.
-
-        DCHECK_EQ(0, num_saved_registers_ % 2);
-        // Always an even number of capture registers. This allows us to
-        // unroll the loop once to add an operation between a load of a register
-        // and the following use of that register.
-        for (int i = 0; i < num_saved_registers_; i += 2) {
-          __ LoadP(r5, register_location(i), r0);
-          __ LoadP(r6, register_location(i + 1), r0);
-          if (i == 0 && global_with_zero_length_check()) {
-            // Keep capture start in r25 for the zero-length check later.
-            __ mr(r25, r5);
-          }
-          if (mode_ == UC16) {
-            __ ShiftRightArithImm(r5, r5, 1);
-            __ add(r5, r4, r5);
-            __ ShiftRightArithImm(r6, r6, 1);
-            __ add(r6, r4, r6);
-          } else {
-            __ add(r5, r4, r5);
-            __ add(r6, r4, r6);
-          }
-          __ stw(r5, MemOperand(r3));
-          __ addi(r3, r3, Operand(kIntSize));
-          __ stw(r6, MemOperand(r3));
-          __ addi(r3, r3, Operand(kIntSize));
-        }
-      }
-
-      if (global()) {
-        // Restart matching if the regular expression is flagged as global.
-        __ LoadP(r3, MemOperand(frame_pointer(), kSuccessfulCaptures));
-        __ LoadP(r4, MemOperand(frame_pointer(), kNumOutputRegisters));
-        __ LoadP(r5, MemOperand(frame_pointer(), kRegisterOutput));
-        // Increment success counter.
-        __ addi(r3, r3, Operand(1));
-        __ StoreP(r3, MemOperand(frame_pointer(), kSuccessfulCaptures));
-        // Capture results have been stored, so the number of remaining global
-        // output registers is reduced by the number of stored captures.
-        __ subi(r4, r4, Operand(num_saved_registers_));
-        // Check whether we have enough room for another set of capture results.
-        __ cmpi(r4, Operand(num_saved_registers_));
-        __ blt(&return_r3);
-
-        __ StoreP(r4, MemOperand(frame_pointer(), kNumOutputRegisters));
-        // Advance the location for output.
-        __ addi(r5, r5, Operand(num_saved_registers_ * kIntSize));
-        __ StoreP(r5, MemOperand(frame_pointer(), kRegisterOutput));
-
-        // Prepare r3 to initialize registers with its value in the next run.
-        __ LoadP(r3, MemOperand(frame_pointer(), kInputStartMinusOne));
-
-        if (global_with_zero_length_check()) {
-          // Special case for zero-length matches.
-          // r25: capture start index
-          __ cmp(current_input_offset(), r25);
-          // Not a zero-length match, restart.
-          __ bne(&load_char_start_regexp);
-          // Offset from the end is zero if we already reached the end.
-          __ cmpi(current_input_offset(), Operand::Zero());
-          __ beq(&exit_label_);
-          // Advance current position after a zero-length match.
-          __ addi(current_input_offset(), current_input_offset(),
-                  Operand((mode_ == UC16) ? 2 : 1));
-        }
-
-        __ b(&load_char_start_regexp);
-      } else {
-        __ li(r3, Operand(SUCCESS));
-      }
-    }
-
-    // Exit and return r3
-    __ bind(&exit_label_);
-    if (global()) {
-      __ LoadP(r3, MemOperand(frame_pointer(), kSuccessfulCaptures));
-    }
-
-    __ bind(&return_r3);
-    // Skip sp past regexp registers and local variables..
-    __ mr(sp, frame_pointer());
-    // Restore registers r25..r31 and return (restoring lr to pc).
-    __ MultiPop(registers_to_retain);
-    __ pop(r0);
-    __ mtlr(r0);
-    __ blr();
-
-    // Backtrack code (branch target for conditional backtracks).
-    if (backtrack_label_.is_linked()) {
-      __ bind(&backtrack_label_);
-      Backtrack();
-    }
-
-    Label exit_with_exception;
-
-    // Preempt-code
-    if (check_preempt_label_.is_linked()) {
-      SafeCallTarget(&check_preempt_label_);
-
-      CallCheckStackGuardState(r3);
-      __ cmpi(r3, Operand::Zero());
-      // If returning non-zero, we should end execution with the given
-      // result as return value.
-      __ bne(&return_r3);
-
-      // String might have moved: Reload end of string from frame.
-      __ LoadP(end_of_input_address(), MemOperand(frame_pointer(), kInputEnd));
-      SafeReturn();
-    }
-
-    // Backtrack stack overflow code.
-    if (stack_overflow_label_.is_linked()) {
-      SafeCallTarget(&stack_overflow_label_);
-      // Reached if the backtrack-stack limit has been hit.
-      Label grow_failed;
-
-      // Call GrowStack(backtrack_stackpointer(), &stack_base)
-      static const int num_arguments = 3;
-      __ PrepareCallCFunction(num_arguments, r3);
-      __ mr(r3, backtrack_stackpointer());
-      __ addi(r4, frame_pointer(), Operand(kStackHighEnd));
-      __ mov(r5, Operand(ExternalReference::isolate_address(isolate())));
-      ExternalReference grow_stack =
-          ExternalReference::re_grow_stack(isolate());
-      __ CallCFunction(grow_stack, num_arguments);
-      // If return NULL, we have failed to grow the stack, and
-      // must exit with a stack-overflow exception.
-      __ cmpi(r3, Operand::Zero());
-      __ beq(&exit_with_exception);
-      // Otherwise use return value as new stack pointer.
-      __ mr(backtrack_stackpointer(), r3);
-      // Restore saved registers and continue.
-      SafeReturn();
-    }
-
-    if (exit_with_exception.is_linked()) {
-      // If any of the code above needed to exit with an exception.
-      __ bind(&exit_with_exception);
-      // Exit with Result EXCEPTION(-1) to signal thrown exception.
-      __ li(r3, Operand(EXCEPTION));
-      __ b(&return_r3);
-    }
-  }
-
-  CodeDesc code_desc;
-  masm_->GetCode(&code_desc);
-  Handle<Code> code = isolate()->factory()->NewCode(
-      code_desc, Code::ComputeFlags(Code::REGEXP), masm_->CodeObject());
-  PROFILE(masm_->isolate(), RegExpCodeCreateEvent(*code, *source));
-  return Handle<HeapObject>::cast(code);
-}
-
-
-void RegExpMacroAssemblerPPC::GoTo(Label* to) { BranchOrBacktrack(al, to); }
-
-
-void RegExpMacroAssemblerPPC::IfRegisterGE(int reg, int comparand,
-                                           Label* if_ge) {
-  __ LoadP(r3, register_location(reg), r0);
-  __ Cmpi(r3, Operand(comparand), r0);
-  BranchOrBacktrack(ge, if_ge);
-}
-
-
-void RegExpMacroAssemblerPPC::IfRegisterLT(int reg, int comparand,
-                                           Label* if_lt) {
-  __ LoadP(r3, register_location(reg), r0);
-  __ Cmpi(r3, Operand(comparand), r0);
-  BranchOrBacktrack(lt, if_lt);
-}
-
-
-void RegExpMacroAssemblerPPC::IfRegisterEqPos(int reg, Label* if_eq) {
-  __ LoadP(r3, register_location(reg), r0);
-  __ cmp(r3, current_input_offset());
-  BranchOrBacktrack(eq, if_eq);
-}
-
-
-RegExpMacroAssembler::IrregexpImplementation
-RegExpMacroAssemblerPPC::Implementation() {
-  return kPPCImplementation;
-}
-
-
-void RegExpMacroAssemblerPPC::LoadCurrentCharacter(int cp_offset,
-                                                   Label* on_end_of_input,
-                                                   bool check_bounds,
-                                                   int characters) {
-  DCHECK(cp_offset >= -1);        // ^ and \b can look behind one character.
-  DCHECK(cp_offset < (1 << 30));  // Be sane! (And ensure negation works)
-  if (check_bounds) {
-    CheckPosition(cp_offset + characters - 1, on_end_of_input);
-  }
-  LoadCurrentCharacterUnchecked(cp_offset, characters);
-}
-
-
-void RegExpMacroAssemblerPPC::PopCurrentPosition() {
-  Pop(current_input_offset());
-}
-
-
-void RegExpMacroAssemblerPPC::PopRegister(int register_index) {
-  Pop(r3);
-  __ StoreP(r3, register_location(register_index), r0);
-}
-
-
-void RegExpMacroAssemblerPPC::PushBacktrack(Label* label) {
-  __ mov_label_offset(r3, label);
-  Push(r3);
-  CheckStackLimit();
-}
-
-
-void RegExpMacroAssemblerPPC::PushCurrentPosition() {
-  Push(current_input_offset());
-}
-
-
-void RegExpMacroAssemblerPPC::PushRegister(int register_index,
-                                           StackCheckFlag check_stack_limit) {
-  __ LoadP(r3, register_location(register_index), r0);
-  Push(r3);
-  if (check_stack_limit) CheckStackLimit();
-}
-
-
-void RegExpMacroAssemblerPPC::ReadCurrentPositionFromRegister(int reg) {
-  __ LoadP(current_input_offset(), register_location(reg), r0);
-}
-
-
-void RegExpMacroAssemblerPPC::ReadStackPointerFromRegister(int reg) {
-  __ LoadP(backtrack_stackpointer(), register_location(reg), r0);
-  __ LoadP(r3, MemOperand(frame_pointer(), kStackHighEnd));
-  __ add(backtrack_stackpointer(), backtrack_stackpointer(), r3);
-}
-
-
-void RegExpMacroAssemblerPPC::SetCurrentPositionFromEnd(int by) {
-  Label after_position;
-  __ Cmpi(current_input_offset(), Operand(-by * char_size()), r0);
-  __ bge(&after_position);
-  __ mov(current_input_offset(), Operand(-by * char_size()));
-  // On RegExp code entry (where this operation is used), the character before
-  // the current position is expected to be already loaded.
-  // We have advanced the position, so it's safe to read backwards.
-  LoadCurrentCharacterUnchecked(-1, 1);
-  __ bind(&after_position);
-}
-
-
-void RegExpMacroAssemblerPPC::SetRegister(int register_index, int to) {
-  DCHECK(register_index >= num_saved_registers_);  // Reserved for positions!
-  __ mov(r3, Operand(to));
-  __ StoreP(r3, register_location(register_index), r0);
-}
-
-
-bool RegExpMacroAssemblerPPC::Succeed() {
-  __ b(&success_label_);
-  return global();
-}
-
-
-void RegExpMacroAssemblerPPC::WriteCurrentPositionToRegister(int reg,
-                                                             int cp_offset) {
-  if (cp_offset == 0) {
-    __ StoreP(current_input_offset(), register_location(reg), r0);
-  } else {
-    __ mov(r0, Operand(cp_offset * char_size()));
-    __ add(r3, current_input_offset(), r0);
-    __ StoreP(r3, register_location(reg), r0);
-  }
-}
-
-
-void RegExpMacroAssemblerPPC::ClearRegisters(int reg_from, int reg_to) {
-  DCHECK(reg_from <= reg_to);
-  __ LoadP(r3, MemOperand(frame_pointer(), kInputStartMinusOne));
-  for (int reg = reg_from; reg <= reg_to; reg++) {
-    __ StoreP(r3, register_location(reg), r0);
-  }
-}
-
-
-void RegExpMacroAssemblerPPC::WriteStackPointerToRegister(int reg) {
-  __ LoadP(r4, MemOperand(frame_pointer(), kStackHighEnd));
-  __ sub(r3, backtrack_stackpointer(), r4);
-  __ StoreP(r3, register_location(reg), r0);
-}
-
-
-// Private methods:
-
-void RegExpMacroAssemblerPPC::CallCheckStackGuardState(Register scratch) {
-  int frame_alignment = masm_->ActivationFrameAlignment();
-  int stack_space = kNumRequiredStackFrameSlots;
-  int stack_passed_arguments = 1;  // space for return address pointer
-
-  // The following stack manipulation logic is similar to
-  // PrepareCallCFunction.  However, we need an extra slot on the
-  // stack to house the return address parameter.
-  if (frame_alignment > kPointerSize) {
-    // Make stack end at alignment and make room for stack arguments
-    // -- preserving original value of sp.
-    __ mr(scratch, sp);
-    __ addi(sp, sp, Operand(-(stack_passed_arguments + 1) * kPointerSize));
-    DCHECK(base::bits::IsPowerOfTwo32(frame_alignment));
-    __ ClearRightImm(sp, sp, Operand(WhichPowerOf2(frame_alignment)));
-    __ StoreP(scratch, MemOperand(sp, stack_passed_arguments * kPointerSize));
-  } else {
-    // Make room for stack arguments
-    stack_space += stack_passed_arguments;
-  }
-
-  // Allocate frame with required slots to make ABI work.
-  __ li(r0, Operand::Zero());
-  __ StorePU(r0, MemOperand(sp, -stack_space * kPointerSize));
-
-  // RegExp code frame pointer.
-  __ mr(r5, frame_pointer());
-  // Code* of self.
-  __ mov(r4, Operand(masm_->CodeObject()));
-  // r3 will point to the return address, placed by DirectCEntry.
-  __ addi(r3, sp, Operand(kStackFrameExtraParamSlot * kPointerSize));
-
-  ExternalReference stack_guard_check =
-      ExternalReference::re_check_stack_guard_state(isolate());
-  __ mov(ip, Operand(stack_guard_check));
-  DirectCEntryStub stub(isolate());
-  stub.GenerateCall(masm_, ip);
-
-  // Restore the stack pointer
-  stack_space = kNumRequiredStackFrameSlots + stack_passed_arguments;
-  if (frame_alignment > kPointerSize) {
-    __ LoadP(sp, MemOperand(sp, stack_space * kPointerSize));
-  } else {
-    __ addi(sp, sp, Operand(stack_space * kPointerSize));
-  }
-
-  __ mov(code_pointer(), Operand(masm_->CodeObject()));
-}
-
-
-// Helper function for reading a value out of a stack frame.
-template <typename T>
-static T& frame_entry(Address re_frame, int frame_offset) {
-  return reinterpret_cast<T&>(Memory::int32_at(re_frame + frame_offset));
-}
-
-
-template <typename T>
-static T* frame_entry_address(Address re_frame, int frame_offset) {
-  return reinterpret_cast<T*>(re_frame + frame_offset);
-}
-
-
-int RegExpMacroAssemblerPPC::CheckStackGuardState(Address* return_address,
-                                                  Code* re_code,
-                                                  Address re_frame) {
-  return NativeRegExpMacroAssembler::CheckStackGuardState(
-      frame_entry<Isolate*>(re_frame, kIsolate),
-      frame_entry<intptr_t>(re_frame, kStartIndex),
-      frame_entry<intptr_t>(re_frame, kDirectCall) == 1, return_address,
-      re_code, frame_entry_address<String*>(re_frame, kInputString),
-      frame_entry_address<const byte*>(re_frame, kInputStart),
-      frame_entry_address<const byte*>(re_frame, kInputEnd));
-}
-
-
-MemOperand RegExpMacroAssemblerPPC::register_location(int register_index) {
-  DCHECK(register_index < (1 << 30));
-  if (num_registers_ <= register_index) {
-    num_registers_ = register_index + 1;
-  }
-  return MemOperand(frame_pointer(),
-                    kRegisterZero - register_index * kPointerSize);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckPosition(int cp_offset,
-                                            Label* on_outside_input) {
-  __ Cmpi(current_input_offset(), Operand(-cp_offset * char_size()), r0);
-  BranchOrBacktrack(ge, on_outside_input);
-}
-
-
-void RegExpMacroAssemblerPPC::BranchOrBacktrack(Condition condition, Label* to,
-                                                CRegister cr) {
-  if (condition == al) {  // Unconditional.
-    if (to == NULL) {
-      Backtrack();
-      return;
-    }
-    __ b(to);
-    return;
-  }
-  if (to == NULL) {
-    __ b(condition, &backtrack_label_, cr);
-    return;
-  }
-  __ b(condition, to, cr);
-}
-
-
-void RegExpMacroAssemblerPPC::SafeCall(Label* to, Condition cond,
-                                       CRegister cr) {
-  __ b(cond, to, cr, SetLK);
-}
-
-
-void RegExpMacroAssemblerPPC::SafeReturn() {
-  __ pop(r0);
-  __ mov(ip, Operand(masm_->CodeObject()));
-  __ add(r0, r0, ip);
-  __ mtlr(r0);
-  __ blr();
-}
-
-
-void RegExpMacroAssemblerPPC::SafeCallTarget(Label* name) {
-  __ bind(name);
-  __ mflr(r0);
-  __ mov(ip, Operand(masm_->CodeObject()));
-  __ sub(r0, r0, ip);
-  __ push(r0);
-}
-
-
-void RegExpMacroAssemblerPPC::Push(Register source) {
-  DCHECK(!source.is(backtrack_stackpointer()));
-  __ StorePU(source, MemOperand(backtrack_stackpointer(), -kPointerSize));
-}
-
-
-void RegExpMacroAssemblerPPC::Pop(Register target) {
-  DCHECK(!target.is(backtrack_stackpointer()));
-  __ LoadP(target, MemOperand(backtrack_stackpointer()));
-  __ addi(backtrack_stackpointer(), backtrack_stackpointer(),
-          Operand(kPointerSize));
-}
-
-
-void RegExpMacroAssemblerPPC::CheckPreemption() {
-  // Check for preemption.
-  ExternalReference stack_limit =
-      ExternalReference::address_of_stack_limit(isolate());
-  __ mov(r3, Operand(stack_limit));
-  __ LoadP(r3, MemOperand(r3));
-  __ cmpl(sp, r3);
-  SafeCall(&check_preempt_label_, le);
-}
-
-
-void RegExpMacroAssemblerPPC::CheckStackLimit() {
-  ExternalReference stack_limit =
-      ExternalReference::address_of_regexp_stack_limit(isolate());
-  __ mov(r3, Operand(stack_limit));
-  __ LoadP(r3, MemOperand(r3));
-  __ cmpl(backtrack_stackpointer(), r3);
-  SafeCall(&stack_overflow_label_, le);
-}
-
-
-bool RegExpMacroAssemblerPPC::CanReadUnaligned() {
-  return CpuFeatures::IsSupported(UNALIGNED_ACCESSES) && !slow_safe();
-}
-
-
-void RegExpMacroAssemblerPPC::LoadCurrentCharacterUnchecked(int cp_offset,
-                                                            int characters) {
-  Register offset = current_input_offset();
-  if (cp_offset != 0) {
-    // r25 is not being used to store the capture start index at this point.
-    __ addi(r25, current_input_offset(), Operand(cp_offset * char_size()));
-    offset = r25;
-  }
-  // The lwz, stw, lhz, sth instructions can do unaligned accesses, if the CPU
-  // and the operating system running on the target allow it.
-  // We assume we don't want to do unaligned loads on PPC, so this function
-  // must only be used to load a single character at a time.
-
-  DCHECK(characters == 1);
-  __ add(current_character(), end_of_input_address(), offset);
-  if (mode_ == LATIN1) {
-    __ lbz(current_character(), MemOperand(current_character()));
-  } else {
-    DCHECK(mode_ == UC16);
-    __ lhz(current_character(), MemOperand(current_character()));
-  }
-}
-
-
-#undef __
-
-#endif  // V8_INTERPRETED_REGEXP
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_TARGET_ARCH_PPC