[ia32] Fixes a bug in cmpw.

src/ia32/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 834 matching lines @@
   EnsureSpace ensure_space(this);
   EMIT(0x66);
   EMIT(0x81);
   emit_operand(edi, op);
   emit_w(imm16);
 }
 
 void Assembler::cmpw(Register reg, const Operand& op) {
   EnsureSpace ensure_space(this);
   EMIT(0x66);
+  EMIT(0x3B);
+  emit_operand(reg, op);
+}
+
+void Assembler::cmpw(const Operand& op, Register reg) {
+  EnsureSpace ensure_space(this);
+  EMIT(0x66);
   EMIT(0x39);
   emit_operand(reg, op);
 }
 
-void Assembler::cmpw(const Operand& op, Register reg) {
-  EnsureSpace ensure_space(this);
-  EMIT(0x66);
-  EMIT(0x3B);
-  emit_operand(reg, op);
-}
-
 void Assembler::cmp(Register reg, int32_t imm32) {
   EnsureSpace ensure_space(this);
   emit_arith(7, Operand(reg), Immediate(imm32));
 }
 
 
 void Assembler::cmp(Register reg, Handle<Object> handle) {
   EnsureSpace ensure_space(this);
   emit_arith(7, Operand(reg), Immediate(handle));
 }
@@ skipping 2198 matching lines @@
     fflush(coverage_log);
   }
 }
 
 #endif
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32