X64: Disassembler updated to using REX, extended registers and some X64 opcodes.

src/x64/assembler-x64.h

Index: src/x64/assembler-x64.h
diff --git a/src/x64/assembler-x64.h b/src/x64/assembler-x64.h
index 97020398b5c18cdb4f9aacb570a8aecc2a714bc9..7e309346402446c441d90a86a1c590ddcbb6e1c2 100644
--- a/src/x64/assembler-x64.h
+++ b/src/x64/assembler-x64.h
@@ -566,10 +566,22 @@ class Assembler : public Malloced {
     arithmetic_op_32(0x3B, dst, src);
   }
 
+  void cmpl(Register dst, const Operand& src) {
+    arithmetic_op_32(0x3B, src, dst);
+  }
+
+  void cmpl(const Operand& dst, Register src) {
+    arithmetic_op_32(0x39, dst, src);
+  }
+
   void cmpl(Register dst, Immediate src) {
     immediate_arithmetic_op_32(0x7, dst, src);
   }
 
+  void cmpl(const Operand& dst, Immediate src) {
+    immediate_arithmetic_op_32(0x7, dst, src);
+  }
+
   void cmpq(Register dst, Register src) {
     arithmetic_op(0x3B, dst, src);
   }
@@ -1091,6 +1103,7 @@ class Assembler : public Malloced {
   // ModR/M byte.
   void arithmetic_op(byte opcode, Register dst, Register src);
   void arithmetic_op_32(byte opcode, Register dst, Register src);
+  void arithmetic_op_32(byte opcode, const Operand& dst, Register src);
   void arithmetic_op(byte opcode, Register reg, const Operand& op);
   void immediate_arithmetic_op(byte subcode, Register dst, Immediate src);
   void immediate_arithmetic_op(byte subcode, const Operand& dst, Immediate src);