--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/s-imgllb.adb	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,161 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                       S Y S T E M . I M G _ L L B                        --
+--                                                                          --
+--                                 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.Unsigned_Types; use System.Unsigned_Types;
+
+package body System.Img_LLB is
+
+   ---------------------------------------
+   -- Set_Image_Based_Long_Long_Integer --
+   ---------------------------------------
+
+   procedure Set_Image_Based_Long_Long_Integer
+     (V : Long_Long_Integer;
+      B : Natural;
+      W : Integer;
+      S : out String;
+      P : in out Natural)
+   is
+      Start : Natural;
+
+   begin
+      --  Positive case can just use the unsigned circuit directly
+
+      if V >= 0 then
+         Set_Image_Based_Long_Long_Unsigned
+           (Long_Long_Unsigned (V), B, W, S, P);
+
+      --  Negative case has to set a minus sign. Note also that we have to be
+      --  careful not to generate overflow with the largest negative number.
+
+      else
+         P := P + 1;
+         S (P) := ' ';
+         Start := P;
+
+         declare
+            pragma Suppress (Overflow_Check);
+            pragma Suppress (Range_Check);
+         begin
+            Set_Image_Based_Long_Long_Unsigned
+              (Long_Long_Unsigned (-V), B, W - 1, S, P);
+         end;
+
+         --  Set minus sign in last leading blank location. Because of the
+         --  code above, there must be at least one such location.
+
+         while S (Start + 1) = ' ' loop
+            Start := Start + 1;
+         end loop;
+
+         S (Start) := '-';
+      end if;
+
+   end Set_Image_Based_Long_Long_Integer;
+
+   ----------------------------------------
+   -- Set_Image_Based_Long_Long_Unsigned --
+   ----------------------------------------
+
+   procedure Set_Image_Based_Long_Long_Unsigned
+     (V : Long_Long_Unsigned;
+      B : Natural;
+      W : Integer;
+      S : out String;
+      P : in out Natural)
+   is
+      Start : constant Natural := P;
+      F, T  : Natural;
+      BU    : constant Long_Long_Unsigned := Long_Long_Unsigned (B);
+      Hex   : constant array
+                (Long_Long_Unsigned range 0 .. 15) of Character :=
+                                                         "0123456789ABCDEF";
+
+      procedure Set_Digits (T : Long_Long_Unsigned);
+      --  Set digits of absolute value of T
+
+      ----------------
+      -- Set_Digits --
+      ----------------
+
+      procedure Set_Digits (T : Long_Long_Unsigned) is
+      begin
+         if T >= BU then
+            Set_Digits (T / BU);
+            P := P + 1;
+            S (P) := Hex (T mod BU);
+         else
+            P := P + 1;
+            S (P) := Hex (T);
+         end if;
+      end Set_Digits;
+
+   --  Start of processing for Set_Image_Based_Long_Long_Unsigned
+
+   begin
+
+      if B >= 10 then
+         P := P + 1;
+         S (P) := '1';
+      end if;
+
+      P := P + 1;
+      S (P) := Character'Val (Character'Pos ('0') + B mod 10);
+
+      P := P + 1;
+      S (P) := '#';
+
+      Set_Digits (V);
+
+      P := P + 1;
+      S (P) := '#';
+
+      --  Add leading spaces if required by width parameter
+
+      if P - Start < W then
+         F := P;
+         P := Start + W;
+         T := P;
+
+         while F > Start loop
+            S (T) := S (F);
+            T := T - 1;
+            F := F - 1;
+         end loop;
+
+         for J in Start + 1 .. T loop
+            S (J) := ' ';
+         end loop;
+      end if;
+
+   end Set_Image_Based_Long_Long_Unsigned;
+
+end System.Img_LLB;