--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/aarch64/aarch64-option-extensions.def	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,74 @@
+/* Copyright (C) 2012-2017 Free Software Foundation, Inc.
+   Contributed by ARM Ltd.
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   GCC 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 for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING3.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+/* This is a list of ISA extentsions in AArch64.
+
+   Before using #include to read this file, define a macro:
+
+      AARCH64_OPT_EXTENSION(EXT_NAME, FLAG_CANONICAL, FLAGS_ON, FLAGS_OFF, FEATURE_STRING)
+
+   EXT_NAME is the name of the extension, represented as a string constant.
+   FLAGS_CANONICAL is the canonical internal name for this flag.
+   FLAGS_ON are the bitwise-or of the features that enabling the extension
+   adds, or zero if enabling this extension has no effect on other features.
+   FLAGS_OFF are the bitwise-or of the features that disabling the extension
+   removes, or zero if disabling this extension has no effect on other
+   features.
+   FEAT_STRING is a string containing the entries in the 'Features' field of
+   /proc/cpuinfo on a GNU/Linux system that correspond to this architecture
+   extension being available.  Sometimes multiple entries are needed to enable
+   the extension (for example, the 'crypto' extension depends on four
+   entries: aes, pmull, sha1, sha2 being present).  In that case this field
+   should contain a space (" ") separated list of the strings in 'Features'
+   that are required.  Their order is not important.  */
+
+/* Enabling "fp" just enables "fp".
+   Disabling "fp" also disables "simd", "crypto" and "fp16".  */
+AARCH64_OPT_EXTENSION("fp", AARCH64_FL_FP, 0, AARCH64_FL_SIMD | AARCH64_FL_CRYPTO | AARCH64_FL_F16, "fp")
+
+/* Enabling "simd" also enables "fp".
+   Disabling "simd" also disables "crypto" and "dotprod".  */
+AARCH64_OPT_EXTENSION("simd", AARCH64_FL_SIMD, AARCH64_FL_FP, AARCH64_FL_CRYPTO | AARCH64_FL_DOTPROD, "asimd")
+
+/* Enabling "crypto" also enables "fp", "simd".
+   Disabling "crypto" just disables "crypto".  */
+AARCH64_OPT_EXTENSION("crypto", AARCH64_FL_CRYPTO, AARCH64_FL_FP | AARCH64_FL_SIMD, 0, "aes pmull sha1 sha2")
+
+/* Enabling or disabling "crc" only changes "crc".  */
+AARCH64_OPT_EXTENSION("crc", AARCH64_FL_CRC, 0, 0, "crc32")
+
+/* Enabling or disabling "lse" only changes "lse".  */
+AARCH64_OPT_EXTENSION("lse", AARCH64_FL_LSE, 0, 0, "atomics")
+
+/* Enabling "fp16" also enables "fp".
+   Disabling "fp16" just disables "fp16".  */
+AARCH64_OPT_EXTENSION("fp16", AARCH64_FL_F16, AARCH64_FL_FP, 0, "fphp asimdhp")
+
+/* Enabling or disabling "rcpc" only changes "rcpc".  */
+AARCH64_OPT_EXTENSION("rcpc", AARCH64_FL_RCPC, 0, 0, "lrcpc")
+
+/* Enabling "rdma" also enables "fp", "simd".
+   Disabling "rdma" just disables "rdma".  */
+AARCH64_OPT_EXTENSION("rdma", AARCH64_FL_RDMA, AARCH64_FL_FP | AARCH64_FL_SIMD, 0, "asimdrdm")
+
+/* Enabling "dotprod" also enables "simd".
+   Disabling "dotprod" only disables "dotprod".  */
+AARCH64_OPT_EXTENSION("dotprod", AARCH64_FL_DOTPROD, AARCH64_FL_SIMD, 0, "asimddp")
+
+#undef AARCH64_OPT_EXTENSION