* Fixes and tweaks to regexp-ia32.

src/assembler-ia32.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 822 matching lines @@
 
 
 void Assembler::and_(const Operand& dst, Register src) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   EMIT(0x21);
   emit_operand(src, dst);
 }
 
 
+void Assembler::cmpb(const Operand& op, int8_t imm8) {
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  EMIT(0x80);
+  emit_operand(edi, op);  // edi == 7
+  EMIT(imm8);
+}
+
+
+void Assembler::cmpw(const Operand& op, Immediate imm16) {
+  ASSERT(imm16.is_int16());
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  EMIT(0x66);
+  EMIT(0x81);
+  emit_operand(edi, op);
+  emit_w(imm16);
+}
+
+
 void Assembler::cmp(Register reg, int32_t imm32) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   emit_arith(7, Operand(reg), Immediate(imm32));
 }
 
 
 void Assembler::cmp(Register reg, Handle<Object> handle) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
@@ skipping 17 matching lines @@
 
 
 void Assembler::rep_cmpsb() {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   EMIT(0xFC);  // CLD to ensure forward operation
   EMIT(0xF3);  // REP
   EMIT(0xA6);  // CMPSB
 }
 
-void Assembler::rep_cmpsl() {
+void Assembler::rep_cmpsw() {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   EMIT(0xFC);  // CLD to ensure forward operation
   EMIT(0xF3);  // REP
-  EMIT(0xA7);  // CMPSW
+  EMIT(0x66);  // Operand size overide.
+  EMIT(0xA7);  // CMPS
 }
 
 
 void Assembler::dec_b(Register dst) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   EMIT(0xFE);
   EMIT(0xC8 | dst.code());
 }
 
@@ skipping 1239 matching lines @@
   ASSERT(bound_label.is_bound());
   ASSERT(0 <= position);
   ASSERT(position + static_cast<int>(sizeof(uint32_t)) <= pc_offset());
   ASSERT(long_at(position) == 0);  // only initialize once!
 
   uint32_t label_loc = reinterpret_cast<uint32_t>(addr_at(bound_label.pos()));
   long_at_put(position, label_loc);
 }
 
 } }  // namespace v8::internal