Initial import.

1 files changed, 477 insertions, 0 deletions

diff --git a/chromium/v8/src/regexp-macro-assembler-irregexp.cc b/chromium/v8/src/regexp-macro-assembler-irregexp.cc
new file mode 100644
index 00000000000..3b9a2f66033
--- /dev/null
+++ b/chromium/v8/src/regexp-macro-assembler-irregexp.cc
@@ -0,0 +1,477 @@
+// Copyright 2008-2009 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
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "v8.h"
+#include "ast.h"
+#include "bytecodes-irregexp.h"
+#include "regexp-macro-assembler.h"
+#include "regexp-macro-assembler-irregexp.h"
+#include "regexp-macro-assembler-irregexp-inl.h"
+
+
+namespace v8 {
+namespace internal {
+
+#ifdef V8_INTERPRETED_REGEXP
+
+RegExpMacroAssemblerIrregexp::RegExpMacroAssemblerIrregexp(Vector<byte> buffer,
+                                                           Zone* zone)
+    : RegExpMacroAssembler(zone),
+      buffer_(buffer),
+      pc_(0),
+      own_buffer_(false),
+      advance_current_end_(kInvalidPC),
+      isolate_(zone->isolate()) { }
+
+
+RegExpMacroAssemblerIrregexp::~RegExpMacroAssemblerIrregexp() {
+  if (backtrack_.is_linked()) backtrack_.Unuse();
+  if (own_buffer_) buffer_.Dispose();
+}
+
+
+RegExpMacroAssemblerIrregexp::IrregexpImplementation
+RegExpMacroAssemblerIrregexp::Implementation() {
+  return kBytecodeImplementation;
+}
+
+
+void RegExpMacroAssemblerIrregexp::Bind(Label* l) {
+  advance_current_end_ = kInvalidPC;
+  ASSERT(!l->is_bound());
+  if (l->is_linked()) {
+    int pos = l->pos();
+    while (pos != 0) {
+      int fixup = pos;
+      pos = *reinterpret_cast<int32_t*>(buffer_.start() + fixup);
+      *reinterpret_cast<uint32_t*>(buffer_.start() + fixup) = pc_;
+    }
+  }
+  l->bind_to(pc_);
+}
+
+
+void RegExpMacroAssemblerIrregexp::EmitOrLink(Label* l) {
+  if (l == NULL) l = &backtrack_;
+  if (l->is_bound()) {
+    Emit32(l->pos());
+  } else {
+    int pos = 0;
+    if (l->is_linked()) {
+      pos = l->pos();
+    }
+    l->link_to(pc_);
+    Emit32(pos);
+  }
+}
+
+
+void RegExpMacroAssemblerIrregexp::PopRegister(int register_index) {
+  ASSERT(register_index >= 0);
+  ASSERT(register_index <= kMaxRegister);
+  Emit(BC_POP_REGISTER, register_index);
+}
+
+
+void RegExpMacroAssemblerIrregexp::PushRegister(
+    int register_index,
+    StackCheckFlag check_stack_limit) {
+  ASSERT(register_index >= 0);
+  ASSERT(register_index <= kMaxRegister);
+  Emit(BC_PUSH_REGISTER, register_index);
+}
+
+
+void RegExpMacroAssemblerIrregexp::WriteCurrentPositionToRegister(
+    int register_index, int cp_offset) {
+  ASSERT(register_index >= 0);
+  ASSERT(register_index <= kMaxRegister);
+  Emit(BC_SET_REGISTER_TO_CP, register_index);
+  Emit32(cp_offset);  // Current position offset.
+}
+
+
+void RegExpMacroAssemblerIrregexp::ClearRegisters(int reg_from, int reg_to) {
+  ASSERT(reg_from <= reg_to);
+  for (int reg = reg_from; reg <= reg_to; reg++) {
+    SetRegister(reg, -1);
+  }
+}
+
+
+void RegExpMacroAssemblerIrregexp::ReadCurrentPositionFromRegister(
+    int register_index) {
+  ASSERT(register_index >= 0);
+  ASSERT(register_index <= kMaxRegister);
+  Emit(BC_SET_CP_TO_REGISTER, register_index);
+}
+
+
+void RegExpMacroAssemblerIrregexp::WriteStackPointerToRegister(
+    int register_index) {
+  ASSERT(register_index >= 0);
+  ASSERT(register_index <= kMaxRegister);
+  Emit(BC_SET_REGISTER_TO_SP, register_index);
+}
+
+
+void RegExpMacroAssemblerIrregexp::ReadStackPointerFromRegister(
+    int register_index) {
+  ASSERT(register_index >= 0);
+  ASSERT(register_index <= kMaxRegister);
+  Emit(BC_SET_SP_TO_REGISTER, register_index);
+}
+
+
+void RegExpMacroAssemblerIrregexp::SetCurrentPositionFromEnd(int by) {
+  ASSERT(is_uint24(by));
+  Emit(BC_SET_CURRENT_POSITION_FROM_END, by);
+}
+
+
+void RegExpMacroAssemblerIrregexp::SetRegister(int register_index, int to) {
+  ASSERT(register_index >= 0);
+  ASSERT(register_index <= kMaxRegister);
+  Emit(BC_SET_REGISTER, register_index);
+  Emit32(to);
+}
+
+
+void RegExpMacroAssemblerIrregexp::AdvanceRegister(int register_index, int by) {
+  ASSERT(register_index >= 0);
+  ASSERT(register_index <= kMaxRegister);
+  Emit(BC_ADVANCE_REGISTER, register_index);
+  Emit32(by);
+}
+
+
+void RegExpMacroAssemblerIrregexp::PopCurrentPosition() {
+  Emit(BC_POP_CP, 0);
+}
+
+
+void RegExpMacroAssemblerIrregexp::PushCurrentPosition() {
+  Emit(BC_PUSH_CP, 0);
+}
+
+
+void RegExpMacroAssemblerIrregexp::Backtrack() {
+  Emit(BC_POP_BT, 0);
+}
+
+
+void RegExpMacroAssemblerIrregexp::GoTo(Label* l) {
+  if (advance_current_end_ == pc_) {
+    // Combine advance current and goto.
+    pc_ = advance_current_start_;
+    Emit(BC_ADVANCE_CP_AND_GOTO, advance_current_offset_);
+    EmitOrLink(l);
+    advance_current_end_ = kInvalidPC;
+  } else {
+    // Regular goto.
+    Emit(BC_GOTO, 0);
+    EmitOrLink(l);
+  }
+}
+
+
+void RegExpMacroAssemblerIrregexp::PushBacktrack(Label* l) {
+  Emit(BC_PUSH_BT, 0);
+  EmitOrLink(l);
+}
+
+
+bool RegExpMacroAssemblerIrregexp::Succeed() {
+  Emit(BC_SUCCEED, 0);
+  return false;  // Restart matching for global regexp not supported.
+}
+
+
+void RegExpMacroAssemblerIrregexp::Fail() {
+  Emit(BC_FAIL, 0);
+}
+
+
+void RegExpMacroAssemblerIrregexp::AdvanceCurrentPosition(int by) {
+  ASSERT(by >= kMinCPOffset);
+  ASSERT(by <= kMaxCPOffset);
+  advance_current_start_ = pc_;
+  advance_current_offset_ = by;
+  Emit(BC_ADVANCE_CP, by);
+  advance_current_end_ = pc_;
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckGreedyLoop(
+      Label* on_tos_equals_current_position) {
+  Emit(BC_CHECK_GREEDY, 0);
+  EmitOrLink(on_tos_equals_current_position);
+}
+
+
+void RegExpMacroAssemblerIrregexp::LoadCurrentCharacter(int cp_offset,
+                                                        Label* on_failure,
+                                                        bool check_bounds,
+                                                        int characters) {
+  ASSERT(cp_offset >= kMinCPOffset);
+  ASSERT(cp_offset <= kMaxCPOffset);
+  int bytecode;
+  if (check_bounds) {
+    if (characters == 4) {
+      bytecode = BC_LOAD_4_CURRENT_CHARS;
+    } else if (characters == 2) {
+      bytecode = BC_LOAD_2_CURRENT_CHARS;
+    } else {
+      ASSERT(characters == 1);
+      bytecode = BC_LOAD_CURRENT_CHAR;
+    }
+  } else {
+    if (characters == 4) {
+      bytecode = BC_LOAD_4_CURRENT_CHARS_UNCHECKED;
+    } else if (characters == 2) {
+      bytecode = BC_LOAD_2_CURRENT_CHARS_UNCHECKED;
+    } else {
+      ASSERT(characters == 1);
+      bytecode = BC_LOAD_CURRENT_CHAR_UNCHECKED;
+    }
+  }
+  Emit(bytecode, cp_offset);
+  if (check_bounds) EmitOrLink(on_failure);
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckCharacterLT(uc16 limit,
+                                                    Label* on_less) {
+  Emit(BC_CHECK_LT, limit);
+  EmitOrLink(on_less);
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckCharacterGT(uc16 limit,
+                                                    Label* on_greater) {
+  Emit(BC_CHECK_GT, limit);
+  EmitOrLink(on_greater);
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckCharacter(uint32_t c, Label* on_equal) {
+  if (c > MAX_FIRST_ARG) {
+    Emit(BC_CHECK_4_CHARS, 0);
+    Emit32(c);
+  } else {
+    Emit(BC_CHECK_CHAR, c);
+  }
+  EmitOrLink(on_equal);
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckAtStart(Label* on_at_start) {
+  Emit(BC_CHECK_AT_START, 0);
+  EmitOrLink(on_at_start);
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckNotAtStart(Label* on_not_at_start) {
+  Emit(BC_CHECK_NOT_AT_START, 0);
+  EmitOrLink(on_not_at_start);
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckNotCharacter(uint32_t c,
+                                                     Label* on_not_equal) {
+  if (c > MAX_FIRST_ARG) {
+    Emit(BC_CHECK_NOT_4_CHARS, 0);
+    Emit32(c);
+  } else {
+    Emit(BC_CHECK_NOT_CHAR, c);
+  }
+  EmitOrLink(on_not_equal);
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckCharacterAfterAnd(
+    uint32_t c,
+    uint32_t mask,
+    Label* on_equal) {
+  if (c > MAX_FIRST_ARG) {
+    Emit(BC_AND_CHECK_4_CHARS, 0);
+    Emit32(c);
+  } else {
+    Emit(BC_AND_CHECK_CHAR, c);
+  }
+  Emit32(mask);
+  EmitOrLink(on_equal);
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckNotCharacterAfterAnd(
+    uint32_t c,
+    uint32_t mask,
+    Label* on_not_equal) {
+  if (c > MAX_FIRST_ARG) {
+    Emit(BC_AND_CHECK_NOT_4_CHARS, 0);
+    Emit32(c);
+  } else {
+    Emit(BC_AND_CHECK_NOT_CHAR, c);
+  }
+  Emit32(mask);
+  EmitOrLink(on_not_equal);
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckNotCharacterAfterMinusAnd(
+    uc16 c,
+    uc16 minus,
+    uc16 mask,
+    Label* on_not_equal) {
+  Emit(BC_MINUS_AND_CHECK_NOT_CHAR, c);
+  Emit16(minus);
+  Emit16(mask);
+  EmitOrLink(on_not_equal);
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckCharacterInRange(
+    uc16 from,
+    uc16 to,
+    Label* on_in_range) {
+  Emit(BC_CHECK_CHAR_IN_RANGE, 0);
+  Emit16(from);
+  Emit16(to);
+  EmitOrLink(on_in_range);
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckCharacterNotInRange(
+    uc16 from,
+    uc16 to,
+    Label* on_not_in_range) {
+  Emit(BC_CHECK_CHAR_NOT_IN_RANGE, 0);
+  Emit16(from);
+  Emit16(to);
+  EmitOrLink(on_not_in_range);
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckBitInTable(
+    Handle<ByteArray> table, Label* on_bit_set) {
+  Emit(BC_CHECK_BIT_IN_TABLE, 0);
+  EmitOrLink(on_bit_set);
+  for (int i = 0; i < kTableSize; i += kBitsPerByte) {
+    int byte = 0;
+    for (int j = 0; j < kBitsPerByte; j++) {
+      if (table->get(i + j) != 0) byte |= 1 << j;
+    }
+    Emit8(byte);
+  }
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckNotBackReference(int start_reg,
+                                                         Label* on_not_equal) {
+  ASSERT(start_reg >= 0);
+  ASSERT(start_reg <= kMaxRegister);
+  Emit(BC_CHECK_NOT_BACK_REF, start_reg);
+  EmitOrLink(on_not_equal);
+}
+
+
+void RegExpMacroAssemblerIrregexp::CheckNotBackReferenceIgnoreCase(
+    int start_reg,
+    Label* on_not_equal) {
+  ASSERT(start_reg >= 0);
+  ASSERT(start_reg <= kMaxRegister);
+  Emit(BC_CHECK_NOT_BACK_REF_NO_CASE, start_reg);
+  EmitOrLink(on_not_equal);
+}
+
+
+void RegExpMacroAssemblerIrregexp::IfRegisterLT(int register_index,
+                                                int comparand,
+                                                Label* on_less_than) {
+  ASSERT(register_index >= 0);
+  ASSERT(register_index <= kMaxRegister);
+  Emit(BC_CHECK_REGISTER_LT, register_index);
+  Emit32(comparand);
+  EmitOrLink(on_less_than);
+}
+
+
+void RegExpMacroAssemblerIrregexp::IfRegisterGE(int register_index,
+                                                int comparand,
+                                                Label* on_greater_or_equal) {
+  ASSERT(register_index >= 0);
+  ASSERT(register_index <= kMaxRegister);
+  Emit(BC_CHECK_REGISTER_GE, register_index);
+  Emit32(comparand);
+  EmitOrLink(on_greater_or_equal);
+}
+
+
+void RegExpMacroAssemblerIrregexp::IfRegisterEqPos(int register_index,
+                                                   Label* on_eq) {
+  ASSERT(register_index >= 0);
+  ASSERT(register_index <= kMaxRegister);
+  Emit(BC_CHECK_REGISTER_EQ_POS, register_index);
+  EmitOrLink(on_eq);
+}
+
+
+Handle<HeapObject> RegExpMacroAssemblerIrregexp::GetCode(
+    Handle<String> source) {
+  Bind(&backtrack_);
+  Emit(BC_POP_BT, 0);
+  Handle<ByteArray> array = isolate_->factory()->NewByteArray(length());
+  Copy(array->GetDataStartAddress());
+  return array;
+}
+
+
+int RegExpMacroAssemblerIrregexp::length() {
+  return pc_;
+}
+
+
+void RegExpMacroAssemblerIrregexp::Copy(Address a) {
+  OS::MemCopy(a, buffer_.start(), length());
+}
+
+
+void RegExpMacroAssemblerIrregexp::Expand() {
+  bool old_buffer_was_our_own = own_buffer_;
+  Vector<byte> old_buffer = buffer_;
+  buffer_ = Vector<byte>::New(old_buffer.length() * 2);
+  own_buffer_ = true;
+  OS::MemCopy(buffer_.start(), old_buffer.start(), old_buffer.length());
+  if (old_buffer_was_our_own) {
+    old_buffer.Dispose();
+  }
+}
+
+#endif  // V8_INTERPRETED_REGEXP
+
+} }  // namespace v8::internal