--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/g-shsh32.adb	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,80 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT LIBRARY COMPONENTS                          --
+--                                                                          --
+--           G N A T . S E C U R E _ H A S H E S . S H A 2 _ 3 2            --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--           Copyright (C) 2009-2017, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+package body GNAT.Secure_Hashes.SHA2_32 is
+
+   use Interfaces;
+
+   ------------
+   -- Sigma0 --
+   ------------
+
+   function Sigma0 (X : Word) return Word is
+   begin
+      return Rotate_Right (X, 2)
+         xor Rotate_Right (X, 13)
+         xor Rotate_Right (X, 22);
+   end Sigma0;
+
+   ------------
+   -- Sigma1 --
+   ------------
+
+   function Sigma1 (X : Word) return Word is
+   begin
+      return Rotate_Right (X, 6)
+         xor Rotate_Right (X, 11)
+         xor Rotate_Right (X, 25);
+   end Sigma1;
+
+   --------
+   -- S0 --
+   --------
+
+   function S0 (X : Word) return Word is
+   begin
+      return Rotate_Right (X, 7)
+         xor Rotate_Right (X, 18)
+         xor Shift_Right  (X, 3);
+   end S0;
+
+   --------
+   -- S1 --
+   --------
+
+   function S1 (X : Word) return Word is
+   begin
+      return Rotate_Right (X, 17)
+         xor Rotate_Right (X, 19)
+         xor Shift_Right  (X, 10);
+   end S1;
+
+end GNAT.Secure_Hashes.SHA2_32;