--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/s-pack36.adb	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,250 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                       S Y S T E M . P A C K _ 3 6                        --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--          Copyright (C) 1992-2017, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with System.Storage_Elements;
+with System.Unsigned_Types;
+
+package body System.Pack_36 is
+
+   subtype Bit_Order is System.Bit_Order;
+   Reverse_Bit_Order : constant Bit_Order :=
+     Bit_Order'Val (1 - Bit_Order'Pos (System.Default_Bit_Order));
+
+   subtype Ofs is System.Storage_Elements.Storage_Offset;
+   subtype Uns is System.Unsigned_Types.Unsigned;
+   subtype N07 is System.Unsigned_Types.Unsigned range 0 .. 7;
+
+   use type System.Storage_Elements.Storage_Offset;
+   use type System.Unsigned_Types.Unsigned;
+
+   type Cluster is record
+      E0, E1, E2, E3, E4, E5, E6, E7 : Bits_36;
+   end record;
+
+   for Cluster use record
+      E0 at 0 range 0 * Bits .. 0 * Bits + Bits - 1;
+      E1 at 0 range 1 * Bits .. 1 * Bits + Bits - 1;
+      E2 at 0 range 2 * Bits .. 2 * Bits + Bits - 1;
+      E3 at 0 range 3 * Bits .. 3 * Bits + Bits - 1;
+      E4 at 0 range 4 * Bits .. 4 * Bits + Bits - 1;
+      E5 at 0 range 5 * Bits .. 5 * Bits + Bits - 1;
+      E6 at 0 range 6 * Bits .. 6 * Bits + Bits - 1;
+      E7 at 0 range 7 * Bits .. 7 * Bits + Bits - 1;
+   end record;
+
+   for Cluster'Size use Bits * 8;
+
+   for Cluster'Alignment use Integer'Min (Standard'Maximum_Alignment,
+     1 +
+     1 * Boolean'Pos (Bits mod 2 = 0) +
+     2 * Boolean'Pos (Bits mod 4 = 0));
+   --  Use maximum possible alignment, given the bit field size, since this
+   --  will result in the most efficient code possible for the field.
+
+   type Cluster_Ref is access Cluster;
+
+   type Rev_Cluster is new Cluster
+     with Bit_Order            => Reverse_Bit_Order,
+          Scalar_Storage_Order => Reverse_Bit_Order;
+   type Rev_Cluster_Ref is access Rev_Cluster;
+
+   --  The following declarations are for the case where the address
+   --  passed to GetU_36 or SetU_36 is not guaranteed to be aligned.
+   --  These routines are used when the packed array is itself a
+   --  component of a packed record, and therefore may not be aligned.
+
+   type ClusterU is new Cluster;
+   for ClusterU'Alignment use 1;
+
+   type ClusterU_Ref is access ClusterU;
+
+   type Rev_ClusterU is new ClusterU
+     with Bit_Order            => Reverse_Bit_Order,
+          Scalar_Storage_Order => Reverse_Bit_Order;
+   type Rev_ClusterU_Ref is access Rev_ClusterU;
+
+   ------------
+   -- Get_36 --
+   ------------
+
+   function Get_36
+     (Arr     : System.Address;
+      N       : Natural;
+      Rev_SSO : Boolean) return Bits_36
+   is
+      A  : constant System.Address := Arr + Bits * Ofs (Uns (N) / 8);
+      C  : Cluster_Ref     with Address => A'Address, Import;
+      RC : Rev_Cluster_Ref with Address => A'Address, Import;
+   begin
+      if Rev_SSO then
+         case N07 (Uns (N) mod 8) is
+            when 0 => return RC.E0;
+            when 1 => return RC.E1;
+            when 2 => return RC.E2;
+            when 3 => return RC.E3;
+            when 4 => return RC.E4;
+            when 5 => return RC.E5;
+            when 6 => return RC.E6;
+            when 7 => return RC.E7;
+         end case;
+
+      else
+         case N07 (Uns (N) mod 8) is
+            when 0 => return C.E0;
+            when 1 => return C.E1;
+            when 2 => return C.E2;
+            when 3 => return C.E3;
+            when 4 => return C.E4;
+            when 5 => return C.E5;
+            when 6 => return C.E6;
+            when 7 => return C.E7;
+         end case;
+      end if;
+   end Get_36;
+
+   -------------
+   -- GetU_36 --
+   -------------
+
+   function GetU_36
+     (Arr     : System.Address;
+      N       : Natural;
+      Rev_SSO : Boolean) return Bits_36
+   is
+      A  : constant System.Address := Arr + Bits * Ofs (Uns (N) / 8);
+      C  : ClusterU_Ref     with Address => A'Address, Import;
+      RC : Rev_ClusterU_Ref with Address => A'Address, Import;
+   begin
+      if Rev_SSO then
+         case N07 (Uns (N) mod 8) is
+            when 0 => return RC.E0;
+            when 1 => return RC.E1;
+            when 2 => return RC.E2;
+            when 3 => return RC.E3;
+            when 4 => return RC.E4;
+            when 5 => return RC.E5;
+            when 6 => return RC.E6;
+            when 7 => return RC.E7;
+         end case;
+
+      else
+         case N07 (Uns (N) mod 8) is
+            when 0 => return C.E0;
+            when 1 => return C.E1;
+            when 2 => return C.E2;
+            when 3 => return C.E3;
+            when 4 => return C.E4;
+            when 5 => return C.E5;
+            when 6 => return C.E6;
+            when 7 => return C.E7;
+         end case;
+      end if;
+   end GetU_36;
+
+   ------------
+   -- Set_36 --
+   ------------
+
+   procedure Set_36
+     (Arr     : System.Address;
+      N       : Natural;
+      E       : Bits_36;
+      Rev_SSO : Boolean)
+   is
+      A  : constant System.Address := Arr + Bits * Ofs (Uns (N) / 8);
+      C  : Cluster_Ref     with Address => A'Address, Import;
+      RC : Rev_Cluster_Ref with Address => A'Address, Import;
+   begin
+      if Rev_SSO then
+         case N07 (Uns (N) mod 8) is
+            when 0 => RC.E0 := E;
+            when 1 => RC.E1 := E;
+            when 2 => RC.E2 := E;
+            when 3 => RC.E3 := E;
+            when 4 => RC.E4 := E;
+            when 5 => RC.E5 := E;
+            when 6 => RC.E6 := E;
+            when 7 => RC.E7 := E;
+         end case;
+      else
+         case N07 (Uns (N) mod 8) is
+            when 0 => C.E0 := E;
+            when 1 => C.E1 := E;
+            when 2 => C.E2 := E;
+            when 3 => C.E3 := E;
+            when 4 => C.E4 := E;
+            when 5 => C.E5 := E;
+            when 6 => C.E6 := E;
+            when 7 => C.E7 := E;
+         end case;
+      end if;
+   end Set_36;
+
+   -------------
+   -- SetU_36 --
+   -------------
+
+   procedure SetU_36
+     (Arr     : System.Address;
+      N       : Natural;
+      E       : Bits_36;
+      Rev_SSO : Boolean)
+   is
+      A  : constant System.Address := Arr + Bits * Ofs (Uns (N) / 8);
+      C  : ClusterU_Ref     with Address => A'Address, Import;
+      RC : Rev_ClusterU_Ref with Address => A'Address, Import;
+   begin
+      if Rev_SSO then
+         case N07 (Uns (N) mod 8) is
+            when 0 => RC.E0 := E;
+            when 1 => RC.E1 := E;
+            when 2 => RC.E2 := E;
+            when 3 => RC.E3 := E;
+            when 4 => RC.E4 := E;
+            when 5 => RC.E5 := E;
+            when 6 => RC.E6 := E;
+            when 7 => RC.E7 := E;
+         end case;
+      else
+         case N07 (Uns (N) mod 8) is
+            when 0 => C.E0 := E;
+            when 1 => C.E1 := E;
+            when 2 => C.E2 := E;
+            when 3 => C.E3 := E;
+            when 4 => C.E4 := E;
+            when 5 => C.E5 := E;
+            when 6 => C.E6 := E;
+            when 7 => C.E7 := E;
+         end case;
+      end if;
+   end SetU_36;
+
+end System.Pack_36;