Made char comparisons work

Tracer for regexp macro-assembler instructions


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@859 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/SConscript

@@ -65,7 +65,9 @@ SOURCES = {
   'os:nullos':  ['platform-nullos.cc'],
   'os:win32':   ['platform-win32.cc'],
   'mode:release': [],
-  'mode:debug': ['objects-debug.cc', 'prettyprinter.cc']
+  'mode:debug': [
+    'objects-debug.cc', 'prettyprinter.cc', 'regexp-macro-assembler-tracer.cc'
+  ]
 }
 
 

src/assembler-ia32.cc

@@ -877,7 +877,7 @@ void Assembler::rep_cmpsb() {
   EMIT(0xA6);  // CMPSB
 }
 
-void Assembler::rep_cmpsw() {
+void Assembler::rep_cmpsl() {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   EMIT(0xFC);  // CLD to ensure forward operation

src/assembler-ia32.h

@@ -499,7 +499,7 @@ class Assembler : public Malloced {
   void cmp(const Operand& op, const Immediate& imm);
 
   void rep_cmpsb();
-  void rep_cmpsw();
+  void rep_cmpsl();
 
   void dec_b(Register dst);
 

src/flag-definitions.h

@@ -202,7 +202,6 @@ DEFINE_bool(preemption, false,
 // irregexp
 DEFINE_bool(irregexp, false, "new regular expression code")
 DEFINE_bool(trace_regexps, false, "trace Irregexp execution")
-DEFINE_bool(trace_regexp_bytecodes, false, "trace Irregexp bytecode execution")
 DEFINE_bool(irregexp_native, false, "use native code Irregexp implementation (IA32 only)")
 DEFINE_bool(disable_jscre, false, "abort if JSCRE is used.  Only useful with --irregexp")
 
@@ -296,6 +295,11 @@ DEFINE_bool(collect_heap_spill_statistics, false,
             "report heap spill statistics along with heap_stats "
             "(requires heap_stats)")
 
+// irregexp
+DEFINE_bool(trace_regexp_bytecodes, false, "trace Irregexp bytecode execution")
+DEFINE_bool(trace_regexp_assembler, false,
+            "trace Irregexp macro assembler calls.")
+
 //
 // Logging and profiling only flags
 //

src/jsregexp.cc

@@ -42,6 +42,7 @@
 #include "parser.h"
 #include "assembler-irregexp.h"
 #include "regexp-macro-assembler.h"
+#include "regexp-macro-assembler-tracer.h"
 #include "regexp-macro-assembler-irregexp.h"
 
 #ifdef ARM
@@ -945,11 +946,16 @@ Handle<FixedArray> RegExpCompiler::Assemble(
     RegExpMacroAssembler* macro_assembler,
     RegExpNode* start,
     int capture_count) {
-  macro_assembler_ = macro_assembler;
+#ifdef DEBUG
+  if (FLAG_trace_regexp_assembler)
+    macro_assembler_ = new RegExpMacroAssemblerTracer(macro_assembler);
+  else
+#endif
+    macro_assembler_ = macro_assembler;
   List <RegExpNode*> work_list(0);
   work_list_ = &work_list;
   Label fail;
-  macro_assembler->PushBacktrack(&fail);
+  macro_assembler_->PushBacktrack(&fail);
   if (!start->GoTo(this)) {
     fail.Unuse();
     return Handle<FixedArray>::null();
@@ -960,19 +966,24 @@ Handle<FixedArray> RegExpCompiler::Assemble(
       return Handle<FixedArray>::null();
     }
   }
-  macro_assembler->Bind(&fail);
-  macro_assembler->Fail();
+  macro_assembler_->Bind(&fail);
+  macro_assembler_->Fail();
   Handle<FixedArray> array =
       Factory::NewFixedArray(RegExpImpl::kIrregexpDataLength);
   array->set(RegExpImpl::kIrregexpImplementationIndex,
-             Smi::FromInt(macro_assembler->Implementation()));
+             Smi::FromInt(macro_assembler_->Implementation()));
   array->set(RegExpImpl::kIrregexpNumberOfRegistersIndex,
              Smi::FromInt(next_register_));
   array->set(RegExpImpl::kIrregexpNumberOfCapturesIndex,
              Smi::FromInt(capture_count));
-  Handle<Object> code = macro_assembler->GetCode();
+  Handle<Object> code = macro_assembler_->GetCode();
   array->set(RegExpImpl::kIrregexpCodeIndex, *code);
   work_list_ = NULL;
+#ifdef DEBUG
+  if (FLAG_trace_regexp_assembler) {
+    delete macro_assembler_;
+  }
+#endif
   return array;
 }
 

src/regexp-macro-assembler-ia32.cc

@@ -192,13 +192,8 @@ void RegExpMacroAssemblerIA32::CheckCharacters(Vector<const uc16> str,
   __ mov(ebx, esi);
   __ lea(edi, Operand(esi, edi, times_1, byte_offset));
   LoadConstantBufferAddress(esi, &constant_buffer);
-  __ mov(ecx, str.length());
-  if (mode_ == ASCII) {
-    __ rep_cmpsb();
-  } else {
-    ASSERT(mode_ == UC16);
-    __ rep_cmpsw();
-  }
+  __ mov(ecx, str.length() * char_size());
+  __ rep_cmpsb();
   __ mov(esi, ebx);
   __ mov(edi, eax);
   BranchOrBacktrack(not_equal, on_failure);
@@ -229,11 +224,11 @@ void RegExpMacroAssemblerIA32::CheckNotBackReference(
   __ push(esi);
   __ add(edi, Operand(esi));
   __ add(esi, Operand(eax));
-  if (mode_ == ASCII) {
-    __ rep_cmpsb();
-  } else {
-    __ rep_cmpsw();
+  if (char_size() > 0) {
+    ASSERT(char_size() == 2);
+    __ add(ecx, Operand(ecx));
   }
+  __ rep_cmpsb();
   __ pop(esi);
   __ mov(edi, Operand(ebx));
   BranchOrBacktrack(not_equal, on_no_match);
@@ -397,8 +392,9 @@ Handle<Object> RegExpMacroAssemblerIA32::GetCode() {
     for (int i = 0; i < num_saved_registers_; i++) {
       __ mov(eax, register_location(i));
       __ add(eax, Operand(ecx));  // Convert to index from start, not end.
-      if (char_size() == 2) {
-        __ shr(eax);
+      if (char_size() > 1) {
+        ASSERT(char_size() == 2);
+        __ sar(eax, 1);  // Convert to character index, not byte.
       }
       __ mov(Operand(ebx, i * kPointerSize), eax);
     }

src/regexp-macro-assembler-tracer.cc

+// 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
+//       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 "regexp-macro-assembler.h"
+#include "regexp-macro-assembler-tracer.h"
+
+namespace v8 { namespace internal {
+
+RegExpMacroAssemblerTracer::RegExpMacroAssemblerTracer(
+    RegExpMacroAssembler* assembler) :
+  assembler_(assembler) {
+  unsigned int type = assembler->Implementation();
+  ASSERT(type < 3);
+  const char* impl_names[3] = {"IA32", "ARM", "Bytecode"};
+  PrintF("RegExpMacroAssembler%s();\n", impl_names[type]);
+}
+
+RegExpMacroAssemblerTracer::~RegExpMacroAssemblerTracer() {
+}
+
+void RegExpMacroAssemblerTracer::Bind(Label* label) {
+  PrintF("label[%08x]: (Bind)\n", label, label);
+  assembler_->Bind(label);
+}
+
+void RegExpMacroAssemblerTracer::EmitOrLink(Label* label) {
+  PrintF(" EmitOrLink(label[%08x]);\n", label);
+  assembler_->EmitOrLink(label);
+}
+
+void RegExpMacroAssemblerTracer::AdvanceCurrentPosition(int by) {
+  PrintF(" AdvanceCurrentPosition(by=%d);\n", by);
+  assembler_->AdvanceCurrentPosition(by);
+}
+
+void RegExpMacroAssemblerTracer::PopCurrentPosition() {
+  PrintF(" PopCurrentPosition();\n");
+  assembler_->PopCurrentPosition();
+}
+
+void RegExpMacroAssemblerTracer::PushCurrentPosition() {
+  PrintF(" PushCurrentPosition();\n");
+  assembler_->PushCurrentPosition();
+}
+
+void RegExpMacroAssemblerTracer::Backtrack() {
+  PrintF(" Backtrack();\n");
+  assembler_->Backtrack();
+}
+
+void RegExpMacroAssemblerTracer::GoTo(Label* label) {
+  PrintF(" GoTo(label[%08x]);\n\n", label);
+  assembler_->GoTo(label);
+}
+
+void RegExpMacroAssemblerTracer::PushBacktrack(Label* label) {
+  PrintF(" PushBacktrack(label[%08x]);\n", label);
+  assembler_->PushBacktrack(label);
+}
+
+void RegExpMacroAssemblerTracer::Succeed() {
+  PrintF(" Succeed();\n");
+  assembler_->Succeed();
+}
+
+void RegExpMacroAssemblerTracer::Fail() {
+  PrintF(" Fail();\n");
+  assembler_->Fail();
+}
+
+void RegExpMacroAssemblerTracer::PopRegister(int register_index) {
+  PrintF(" PopRegister(register=%d);\n", register_index);
+  assembler_->PopRegister(register_index);
+}
+
+void RegExpMacroAssemblerTracer::PushRegister(int register_index) {
+  PrintF(" PushRegister(register=%d);\n", register_index);
+  assembler_->PushRegister(register_index);
+}
+
+void RegExpMacroAssemblerTracer::AdvanceRegister(int reg, int by) {
+  PrintF(" AdvanceRegister(register=%d, by=%d);\n", reg, by);
+  assembler_->AdvanceRegister(reg, by);
+}
+
+void RegExpMacroAssemblerTracer::SetRegister(int register_index, int to) {
+  PrintF(" SetRegister(register=%d, to=%d);\n", register_index, to);
+  assembler_->SetRegister(register_index, to);
+}
+
+void RegExpMacroAssemblerTracer::WriteCurrentPositionToRegister(int reg) {
+  PrintF(" WriteCurrentPositionToRegister(register=%d);\n", reg);
+  assembler_->WriteCurrentPositionToRegister(reg);
+}
+
+void RegExpMacroAssemblerTracer::ReadCurrentPositionFromRegister(int reg) {
+  PrintF(" ReadCurrentPositionFromRegister(register=%d);\n", reg);
+  assembler_->ReadCurrentPositionFromRegister(reg);
+}
+
+void RegExpMacroAssemblerTracer::WriteStackPointerToRegister(int reg) {
+  PrintF(" WriteStackPointerToRegister(register=%d);\n", reg);
+  assembler_->WriteStackPointerToRegister(reg);
+}
+
+void RegExpMacroAssemblerTracer::ReadStackPointerFromRegister(int reg) {
+  PrintF(" ReadStackPointerFromRegister(register=%d);\n", reg);
+  assembler_->ReadStackPointerFromRegister(reg);
+}
+
+void RegExpMacroAssemblerTracer::LoadCurrentCharacter(int cp_offset,
+                                                      Label* on_end_of_input) {
+  PrintF(" LoadCurrentCharacter(cp_offset=%d, label[%08x]);\n", cp_offset,
+         on_end_of_input);
+  assembler_->LoadCurrentCharacter(cp_offset, on_end_of_input);
+}
+
+void RegExpMacroAssemblerTracer::CheckCharacterLT(uc16 limit, Label* on_less) {
+  PrintF(" CheckCharacterLT(c='u%04x', label[%08x]);\n", limit, on_less);
+  assembler_->CheckCharacterLT(limit, on_less);
+}
+
+void RegExpMacroAssemblerTracer::CheckCharacterGT(uc16 limit,
+                                                  Label* on_greater) {
+  PrintF(" CheckCharacterGT(c='u%04x', label[%08x]);\n", limit, on_greater);
+  assembler_->CheckCharacterGT(limit, on_greater);
+}
+
+void RegExpMacroAssemblerTracer::CheckCharacter(uc16 c, Label* on_equal) {
+  PrintF(" CheckCharacter(c='u%04x', label[%08x]);\n", c, on_equal);
+  assembler_->CheckCharacter(c, on_equal);
+}
+
+void RegExpMacroAssemblerTracer::CheckNotCharacter(uc16 c,
+                                                   Label* on_not_equal) {
+  PrintF(" CheckNotCharacter(c='u%04x', label[%08x]);\n", c, on_not_equal);
+  assembler_->CheckNotCharacter(c, on_not_equal);
+}
+
+void RegExpMacroAssemblerTracer::CheckNotCharacterAfterOr(uc16 c, uc16 mask,
+                                                          Label* on_not_equal) {
+  PrintF(" CheckNotCharacterAfterOr(c='u%04x', mask=0x%04x, label[%08x]);\n", c,
+         mask, on_not_equal);
+  assembler_->CheckNotCharacterAfterOr(c, mask, on_not_equal);
+}
+
+void RegExpMacroAssemblerTracer::CheckNotCharacterAfterMinusOr(
+    uc16 c,
+    uc16 mask,
+    Label* on_not_equal) {
+  PrintF(" CheckNotCharacterAfterMinusOr(c='u%04x', mask=0x%04x, "
+    "label[%08x]);\n", c, mask, on_not_equal);
+  assembler_->CheckNotCharacterAfterMinusOr(c, mask, on_not_equal);
+}
+
+void RegExpMacroAssemblerTracer::CheckNotBackReference(int start_reg,
+                                                       Label* on_no_match) {
+  PrintF(" CheckNotBackReference(register=%d, label[%08x]);\n", start_reg,
+         on_no_match);
+  assembler_->CheckNotBackReference(start_reg, on_no_match);
+}
+
+void RegExpMacroAssemblerTracer::CheckNotBackReferenceIgnoreCase(
+    int start_reg,
+    Label* on_no_match) {
+  PrintF(" CheckNotBackReferenceIgnoreCase(register=%d, label[%08x]);\n",
+         start_reg, on_no_match);
+  assembler_->CheckNotBackReferenceIgnoreCase(start_reg, on_no_match);
+}
+
+void RegExpMacroAssemblerTracer::CheckCharacters(Vector<const uc16> str,
+                                                 int cp_offset,
+                                                 Label* on_failure) {
+  PrintF(" CheckCharacters(str=\"");
+  for (int i = 0; i < str.length(); i++) {
+    PrintF("u%04x", str[i]);
+  }
+  PrintF("\", cp_offset=%d, label[%08x])\n", cp_offset, on_failure);
+  assembler_->CheckCharacters(str, cp_offset, on_failure);
+}
+
+void RegExpMacroAssemblerTracer::CheckCurrentPosition(int register_index,
+                                                      Label* on_equal) {
+  PrintF(" CheckCurrentPosition(register=%d, label[%08x]);\n", register_index,
+         on_equal);
+  assembler_->CheckCurrentPosition(register_index, on_equal);
+}
+
+void RegExpMacroAssemblerTracer::CheckBitmap(uc16 start, Label* bitmap,
+                                             Label* on_zero) {
+  PrintF(" CheckBitmap(start=u$04x, <bitmap>, label[%08x]);\n", start, on_zero);
+  assembler_->CheckBitmap(start, bitmap, on_zero);
+}
+
+void RegExpMacroAssemblerTracer::DispatchHalfNibbleMap(
+    uc16 start,
+    Label* half_nibble_map,
+    const Vector<Label*>& destinations) {
+  PrintF(" DispatchHalfNibbleMap(start=u$04x, <half_nibble_map>, [", start);
+  for (int i = 0; i < destinations.length(); i++) {
+    if (i > 0)
+      PrintF(", ");
+    PrintF("label[%08x]", destinations[i]);
+  }
+  PrintF(");\n");
+  assembler_->DispatchHalfNibbleMap(start, half_nibble_map, destinations);
+}
+
+void RegExpMacroAssemblerTracer::DispatchByteMap(
+    uc16 start,
+    Label* byte_map,
+    const Vector<Label*>& destinations) {
+  PrintF(" DispatchByteMap(start=u$04x, <byte_map>, [", start);
+  for (int i = 0; i < destinations.length(); i++) {
+    if (i > 0)
+      PrintF(", ");
+    PrintF("label[%08x]", destinations[i]);
+  }
+  PrintF(");\n");
+  assembler_->DispatchByteMap(start, byte_map, destinations);
+}
+
+void RegExpMacroAssemblerTracer::DispatchHighByteMap(
+    byte start,
+    Label* byte_map,
+    const Vector<Label*>& destinations) {
+  PrintF(" DispatchHighByteMap(start=u$04x, <byte_map>, [", start);
+  for (int i = 0; i < destinations.length(); i++) {
+    if (i > 0)
+      PrintF(", ");
+    PrintF("label[%08x]", destinations[i]);
+  }
+  PrintF(");\n");
+  assembler_->DispatchHighByteMap(start, byte_map, destinations);
+}
+
+void RegExpMacroAssemblerTracer::IfRegisterLT(int register_index,
+                                              int comparand, Label* if_lt) {
+  PrintF(" IfRegisterLT(register=%d, number=%d, label[%08x]);\n",
+         register_index, comparand, if_lt);
+  assembler_->IfRegisterLT(register_index, comparand, if_lt);
+}
+
+void RegExpMacroAssemblerTracer::IfRegisterGE(int register_index,
+                                              int comparand, Label* if_ge) {
+  PrintF(" IfRegisterGE(register=%d, number=%d, label[%08x]);\n",
+         register_index, comparand, if_ge);
+  assembler_->IfRegisterGE(register_index, comparand, if_ge);
+}
+
+RegExpMacroAssembler::IrregexpImplementation
+    RegExpMacroAssemblerTracer::Implementation() {
+  return assembler_->Implementation();
+}
+
+Handle<Object> RegExpMacroAssemblerTracer::GetCode() {
+  PrintF(" GetCode();\n");
+  return assembler_->GetCode();
+}
+
+}}  // namespace v8::internal

src/regexp-macro-assembler-tracer.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
+//       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.
+
+#ifndef REGEXP_MACRO_ASSEMBLER_TRACER_H_
+#define REGEXP_MACRO_ASSEMBLER_TRACER_H_
+
+namespace v8 { namespace internal {
+
+// Decorator on a RegExpMacroAssembler that write all calls.
+class RegExpMacroAssemblerTracer: public RegExpMacroAssembler {
+ public:
+  explicit RegExpMacroAssemblerTracer(RegExpMacroAssembler* assembler);
+  virtual ~RegExpMacroAssemblerTracer();
+
+  virtual void AdvanceCurrentPosition(int by);  // Signed cp change.
+  virtual void AdvanceRegister(int reg, int by);  // r[reg] += by.
+  virtual void Backtrack();
+  virtual void Bind(Label* label);
+  virtual void CheckBitmap(uc16 start, Label* bitmap, Label* on_zero);
+  virtual void CheckCharacter(uc16 c, Label* on_equal);
+  virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
+  virtual void CheckCharacterLT(uc16 limit, Label* on_less);
+  virtual void CheckCharacters(
+      Vector<const uc16> str,
+      int cp_offset,
+      Label* on_failure);
+  virtual void CheckCurrentPosition(
+      int register_index,
+      Label* on_equal);
+  virtual void CheckNotBackReference(int start_reg, Label* on_no_match);
+  virtual void CheckNotBackReferenceIgnoreCase(int start_reg,
+                                               Label* on_no_match);
+  virtual void CheckNotCharacter(uc16 c, Label* on_not_equal);
+  virtual void CheckNotCharacterAfterOr(uc16 c,
+                                        uc16 or_with,
+                                        Label* on_not_equal);
+  virtual void CheckNotCharacterAfterMinusOr(uc16 c,
+                                             uc16 minus_then_or_with,
+                                             Label* on_not_equal);
+  virtual void DispatchByteMap(
+      uc16 start,
+      Label* byte_map,
+      const Vector<Label*>& destinations);
+  virtual void DispatchHalfNibbleMap(
+      uc16 start,
+      Label* half_nibble_map,
+      const Vector<Label*>& destinations);
+  virtual void DispatchHighByteMap(
+      byte start,
+      Label* byte_map,
+      const Vector<Label*>& destinations);
+  virtual void EmitOrLink(Label* label);
+  virtual void Fail();
+  virtual Handle<Object> GetCode();
+  virtual void GoTo(Label* label);
+  virtual void IfRegisterGE(int reg, int comparand, Label* if_ge);
+  virtual void IfRegisterLT(int reg, int comparand, Label* if_lt);
+  virtual IrregexpImplementation Implementation();
+  virtual void LoadCurrentCharacter(int cp_offset, Label* on_end_of_input);
+  virtual void PopCurrentPosition();
+  virtual void PopRegister(int register_index);
+  virtual void PushBacktrack(Label* label);
+  virtual void PushCurrentPosition();
+  virtual void PushRegister(int register_index);
+  virtual void ReadCurrentPositionFromRegister(int reg);
+  virtual void ReadStackPointerFromRegister(int reg);
+  virtual void SetRegister(int register_index, int to);
+  virtual void Succeed();
+  virtual void WriteCurrentPositionToRegister(int reg);
+  virtual void WriteStackPointerToRegister(int reg);
+ private:
+  RegExpMacroAssembler* assembler_;
+};
+
+}}  // namespace v8::internal
+
+#endif  // REGEXP_MACRO_ASSEMBLER_TRACER_H_

test/cctest/test-regexp.cc

@@ -811,6 +811,65 @@ TEST(MacroAssemblerIA32Simple) {
 }
 
 
+TEST(MacroAssemblerIA32SimpleUC16) {
+  typedef bool (*UC16Test) (
+      SeqTwoByteString** base, int start_index, int end_index, int* captures);
+
+  V8::Initialize(NULL);
+
+  // regexp-macro-assembler-ia32 needs a handle scope to allocate
+  // byte-arrays for constants.
+  v8::HandleScope scope;
+
+  RegExpMacroAssemblerIA32 m(RegExpMacroAssemblerIA32::UC16, 4);
+
+  uc16 foo_chars[3] = {'f', 'o', 'o'};
+  Vector<const uc16> foo(foo_chars, 3);
+
+  Label fail;
+  m.CheckCharacters(foo, 0, &fail);
+  m.WriteCurrentPositionToRegister(0);
+  m.AdvanceCurrentPosition(3);
+  m.WriteCurrentPositionToRegister(1);
+  m.Succeed();
+  m.Bind(&fail);
+  m.Fail();
+
+  Handle<Object> code_object = m.GetCode();
+  Handle<Code> code = Handle<Code>::cast(code_object);
+  UC16Test test = FUNCTION_CAST<UC16Test>(code->entry());
+
+  int captures[4] = {42, 37, 87, 117};
+  const uc16 input_data[6] = {'f', 'o', 'o', 'f', 'o', '\xa0'};
+  Handle<String> input =
+      Factory::NewStringFromTwoByte(Vector<const uc16>(input_data, 6));
+  Handle<SeqTwoByteString> seq_input = Handle<SeqTwoByteString>::cast(input);
+  Address start_adr = seq_input->GetCharsAddress();
+  int start_offset = start_adr - reinterpret_cast<Address>(*seq_input);
+  int end_offset = start_offset + seq_input->length() * sizeof(uc16);
+
+  bool success =
+      test(seq_input.location(), start_offset, end_offset, captures);
+
+  CHECK(success);
+  CHECK_EQ(0, captures[0]);
+  CHECK_EQ(3, captures[1]);
+  CHECK_EQ(-1, captures[2]);
+  CHECK_EQ(-1, captures[3]);
+
+  const uc16 input_data2[9] = {'b', 'a', 'r', 'b', 'a', 'r', 'b', 'a', '\xa0'};
+  input = Factory::NewStringFromTwoByte(Vector<const uc16>(input_data2, 9));
+  seq_input = Handle<SeqTwoByteString>::cast(input);
+  start_adr = seq_input->GetCharsAddress();
+  start_offset = start_adr - reinterpret_cast<Address>(*seq_input);
+  end_offset = start_offset + seq_input->length() * sizeof(uc16);
+
+  success = test(seq_input.location(), start_offset, end_offset, captures);
+
+  CHECK(!success);
+}
+
+
 TEST(MacroAssemblerIA32Backtrack) {
   typedef bool (*AsciiTest) (
       SeqAsciiString** base, int start_index, int end_index, int* captures);