[turbofan] Byte and word memory operands in x64 cmp/test. Fixes arithmetic_op_8 in assembler-x64.cc

src/x64/assembler-x64.h

 // 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 755 matching lines @@
   }
 
   void cmpw(Register dst, Register src) {
     arithmetic_op_16(0x3B, dst, src);
   }
 
   void cmpw(const Operand& dst, Register src) {
     arithmetic_op_16(0x39, src, dst);
   }
 
+  void testb(Register reg, const Operand& op) { testb(op, reg); }
+
+  void testw(Register reg, const Operand& op) { testw(op, reg); }
+
   void andb(Register dst, Immediate src) {
     immediate_arithmetic_op_8(0x4, dst, src);
   }
 
   void decb(Register dst);
   void decb(const Operand& dst);
 
   // Sign-extends rax into rdx:rax.
   void cqo();
   // Sign-extends eax into edx:eax.
@@ skipping 55 matching lines @@
 
   void subb(Register dst, Immediate src) {
     immediate_arithmetic_op_8(0x5, dst, src);
   }
 
   void testb(Register dst, Register src);
   void testb(Register reg, Immediate mask);
   void testb(const Operand& op, Immediate mask);
   void testb(const Operand& op, Register reg);
 
+  void testw(Register dst, Register src);
+  void testw(Register reg, Immediate mask);
+  void testw(const Operand& op, Immediate mask);
+  void testw(const Operand& op, Register reg);
+
   // Bit operations.
   void bt(const Operand& dst, Register src);
   void bts(const Operand& dst, Register src);
   void bsrq(Register dst, Register src);
   void bsrq(Register dst, const Operand& src);
   void bsrl(Register dst, Register src);
   void bsrl(Register dst, const Operand& src);
   void bsfq(Register dst, Register src);
   void bsfq(Register dst, const Operand& src);
   void bsfl(Register dst, Register src);
@@ skipping 1350 matching lines @@
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_X64_ASSEMBLER_X64_H_