--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnat/g-mbflra.ads	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,103 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--               G N A T . M B B S _ F L O A T _ R A N D O M                --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2017, Free Software Foundation, Inc.         --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT. The copyright notice above, and the license provisions that follow --
+-- apply solely to the  contents of the part following the private keyword. --
+--                                                                          --
+-- 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  The implementation used in this package was contributed by
+--  Robert Eachus. It is based on the work of L. Blum, M. Blum, and
+--  M. Shub, SIAM Journal of Computing, Vol 15. No 2, May 1986. The
+--  particular choices for P and Q chosen here guarantee a period of
+--  562,085,314,430,582 (about 2**49), and the generated sequence has
+--  excellent randomness properties. For further details, see the
+--  paper "Fast Generation of Trustworthy Random Numbers", by Robert
+--  Eachus, which describes both the algorithm and the efficient
+--  implementation approach used here.
+
+--  Formerly, this package was Ada.Numerics.Float_Random. It is retained
+--  here in part to allow users to reconstruct number sequences generated
+--  by previous versions.
+
+with Interfaces;
+
+package GNAT.MBBS_Float_Random is
+
+   --  Basic facilities
+
+   type Generator is limited private;
+
+   subtype Uniformly_Distributed is Float range 0.0 .. 1.0;
+
+   function Random (Gen : Generator) return Uniformly_Distributed;
+
+   procedure Reset (Gen : Generator);
+   procedure Reset (Gen : Generator; Initiator : Integer);
+
+   --  Advanced facilities
+
+   type State is private;
+
+   procedure Save  (Gen : Generator; To_State   : out State);
+   procedure Reset (Gen : Generator; From_State : State);
+
+   Max_Image_Width : constant := 80;
+
+   function Image (Of_State    : State)  return String;
+   function Value (Coded_State : String) return State;
+
+private
+   type Int is new Interfaces.Integer_32;
+
+   --  We prefer to use 14 digits for Flt, but some targets are more limited
+
+   type Flt is digits Positive'Min (14, Long_Long_Float'Digits);
+
+   K1   : constant := 94_833_359;
+   K1F  : constant := 94_833_359.0;
+   K2   : constant := 47_416_679;
+   K2F  : constant := 47_416_679.0;
+   Scal : constant := 1.0 / (K1F * K2F);
+
+   type State is record
+      X1  : Int := 2999 ** 2;      --  Square mod p
+      X2  : Int := 1439 ** 2;      --  Square mod q
+      P   : Int := K1;
+      Q   : Int := K2;
+      X   : Int := 1;
+      Scl : Flt := Scal;
+   end record;
+
+   type Generator is limited record
+      Gen_State : State;
+   end record;
+
+end GNAT.MBBS_Float_Random;