--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/s-carsi8.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,62 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                    GNAT RUN-TIME LIBRARY COMPONENTS                      --
+--                                                                          --
+--         S Y S T E M . C O M P A R E _ A R R A Y _ S I G N E D _ 8        --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2002-2017, Free Software Foundation, Inc.         --
+--                                                                          --
+-- GNAT is free software;  you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
+--                                                                          --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception,   --
+-- version 3.1, as published by the Free Software Foundation.               --
+--                                                                          --
+-- You should have received a copy of the GNU General Public License and    --
+-- a copy of the GCC Runtime Library Exception along with this program;     --
+-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
+-- <http://www.gnu.org/licenses/>.                                          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package contains functions for runtime comparisons on arrays whose
+--  elements are 8-bit discrete type values to be treated as signed.
+
+package System.Compare_Array_Signed_8 is
+
+   --  Note: although the functions in this package are in a sense Pure, the
+   --  package cannot be declared as Pure, since the arguments are addresses,
+   --  not the data, and the result is not pure wrt the address values.
+
+   function Compare_Array_S8
+     (Left      : System.Address;
+      Right     : System.Address;
+      Left_Len  : Natural;
+      Right_Len : Natural) return Integer;
+   --  Compare the array starting at address Left of length Left_Len
+   --  with the array starting at address Right of length Right_Len.
+   --  The comparison is in the normal Ada semantic sense of array
+   --  comparison. The result is -1,0,+1 for Left<Right, Left=Right,
+   --  Left>Right respectively. This function works with 4 byte words
+   --  if the operands are aligned on 4-byte boundaries and long enough.
+
+   function Compare_Array_S8_Unaligned
+     (Left      : System.Address;
+      Right     : System.Address;
+      Left_Len  : Natural;
+      Right_Len : Natural) return Integer;
+   --  Same functionality as Compare_Array_S8 but always proceeds by
+   --  bytes. Used when the caller knows that the operands are unaligned,
+   --  or short enough that it makes no sense to go by words.
+
+end System.Compare_Array_Signed_8;