--- old/src/hotspot/os_cpu/linux_aarch64/linux_aarch64.ad	2019-02-21 17:14:29.824268549 +0800
+++ /dev/null	2019-02-18 08:31:58.882784156 +0800
@@ -1,69 +0,0 @@
-//
-// Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
-// Copyright (c) 2014, Red Hat Inc. All rights reserved.
-// DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
-//
-// This code is free software; you can redistribute it and/or modify it
-// under the terms of the GNU General Public License version 2 only, as
-// published by the Free Software Foundation.
-//
-// This code is distributed in the hope that it will be useful, but WITHOUT
-// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-// version 2 for more details (a copy is included in the LICENSE file that
-// accompanied this code).
-//
-// You should have received a copy of the GNU General Public License version
-// 2 along with this work; if not, write to the Free Software Foundation,
-// Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
-//
-// Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
-// or visit www.oracle.com if you need additional information or have any
-// questions.
-//
-//
-
-// AArch64 Linux Architecture Description File
-
-//----------OS-DEPENDENT ENCODING BLOCK----------------------------------------
-// This block specifies the encoding classes used by the compiler to
-// output byte streams.  Encoding classes generate functions which are
-// called by Machine Instruction Nodes in order to generate the bit
-// encoding of the instruction.  Operands specify their base encoding
-// interface with the interface keyword.  There are currently
-// supported four interfaces, REG_INTER, CONST_INTER, MEMORY_INTER, &
-// COND_INTER.  REG_INTER causes an operand to generate a function
-// which returns its register number when queried.  CONST_INTER causes
-// an operand to generate a function which returns the value of the
-// constant when queried.  MEMORY_INTER causes an operand to generate
-// four functions which return the Base Register, the Index Register,
-// the Scale Value, and the Offset Value of the operand when queried.
-// COND_INTER causes an operand to generate six functions which return
-// the encoding code (ie - encoding bits for the instruction)
-// associated with each basic boolean condition for a conditional
-// instruction.  Instructions specify two basic values for encoding.
-// They use the ins_encode keyword to specify their encoding class
-// (which must be one of the class names specified in the encoding
-// block), and they use the opcode keyword to specify, in order, their
-// primary, secondary, and tertiary opcode.  Only the opcode sections
-// which a particular instruction needs for encoding need to be
-// specified.
-encode %{
-  // Build emit functions for each basic byte or larger field in the intel
-  // encoding scheme (opcode, rm, sib, immediate), and call them from C++
-  // code in the enc_class source block.  Emit functions will live in the
-  // main source block for now.  In future, we can generalize this by
-  // adding a syntax that specifies the sizes of fields in an order,
-  // so that the adlc can build the emit functions automagically
-
-  enc_class Java_To_Runtime(method meth) %{
-  %}
-
-%}
-
-
-// Platform dependent source
-
-source %{
-
-%}