X87: [ia32] Fixes a bug in cmpw.

src/x87/assembler-x87.cc

Index: src/x87/assembler-x87.cc
diff --git a/src/x87/assembler-x87.cc b/src/x87/assembler-x87.cc
index 7e5be7ac9cd59e52523a995f5aaa30f07658603e..fcd0e83ec91af8cba257eb767881a9ddf756d844 100644
--- a/src/x87/assembler-x87.cc
+++ b/src/x87/assembler-x87.cc
@@ -721,14 +721,14 @@ void Assembler::cmpw(const Operand& op, Immediate imm16) {
 void Assembler::cmpw(Register reg, const Operand& op) {
   EnsureSpace ensure_space(this);
   EMIT(0x66);
-  EMIT(0x39);
+  EMIT(0x3B);
   emit_operand(reg, op);
 }
 
 void Assembler::cmpw(const Operand& op, Register reg) {
   EnsureSpace ensure_space(this);
   EMIT(0x66);
-  EMIT(0x3B);
+  EMIT(0x39);
   emit_operand(reg, op);
 }