--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/ada/libgnarl/a-exetim__mingw.adb	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,173 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                   A D A . E X E C U T I O N _ T I M E                    --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--         Copyright (C) 2007-2017, 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 is the Windows native version of this package
+
+with Ada.Task_Identification;           use Ada.Task_Identification;
+with Ada.Unchecked_Conversion;
+
+with System.OS_Interface;               use System.OS_Interface;
+with System.Task_Primitives.Operations; use System.Task_Primitives.Operations;
+with System.Tasking;                    use System.Tasking;
+with System.Win32;                      use System.Win32;
+
+package body Ada.Execution_Time with
+  SPARK_Mode => Off
+is
+
+   ---------
+   -- "+" --
+   ---------
+
+   function "+"
+     (Left  : CPU_Time;
+      Right : Ada.Real_Time.Time_Span) return CPU_Time
+   is
+      use type Ada.Real_Time.Time;
+   begin
+      return CPU_Time (Ada.Real_Time.Time (Left) + Right);
+   end "+";
+
+   function "+"
+     (Left  : Ada.Real_Time.Time_Span;
+      Right : CPU_Time) return CPU_Time
+   is
+      use type Ada.Real_Time.Time;
+   begin
+      return CPU_Time (Left + Ada.Real_Time.Time (Right));
+   end "+";
+
+   ---------
+   -- "-" --
+   ---------
+
+   function "-"
+     (Left  : CPU_Time;
+      Right : Ada.Real_Time.Time_Span) return CPU_Time
+   is
+      use type Ada.Real_Time.Time;
+   begin
+      return CPU_Time (Ada.Real_Time.Time (Left) - Right);
+   end "-";
+
+   function "-"
+     (Left  : CPU_Time;
+      Right : CPU_Time) return Ada.Real_Time.Time_Span
+   is
+      use type Ada.Real_Time.Time;
+   begin
+      return (Ada.Real_Time.Time (Left) - Ada.Real_Time.Time (Right));
+   end "-";
+
+   -----------
+   -- Clock --
+   -----------
+
+   function Clock
+     (T : Ada.Task_Identification.Task_Id :=
+        Ada.Task_Identification.Current_Task) return CPU_Time
+   is
+      Hundreds_Nano_In_Sec : constant Long_Long_Float := 1.0E7;
+
+      function To_Time is new Ada.Unchecked_Conversion
+        (Duration, Ada.Real_Time.Time);
+
+      function To_Task_Id is new Ada.Unchecked_Conversion
+        (Ada.Task_Identification.Task_Id, System.Tasking.Task_Id);
+
+      C_Time : aliased Long_Long_Integer;
+      E_Time : aliased Long_Long_Integer;
+      K_Time : aliased Long_Long_Integer;
+      U_Time : aliased Long_Long_Integer;
+      Res    : BOOL;
+
+   begin
+      if T = Ada.Task_Identification.Null_Task_Id then
+         raise Program_Error;
+      end if;
+
+      Res :=
+        GetThreadTimes
+          (HANDLE (Get_Thread_Id (To_Task_Id (T))),
+           C_Time'Access, E_Time'Access, K_Time'Access, U_Time'Access);
+
+      if Res = System.Win32.FALSE then
+         raise Program_Error;
+      end if;
+
+      return
+        CPU_Time
+          (To_Time
+             (Duration
+                ((Long_Long_Float (K_Time) / Hundreds_Nano_In_Sec)
+                 + (Long_Long_Float (U_Time) / Hundreds_Nano_In_Sec))));
+   end Clock;
+
+   --------------------------
+   -- Clock_For_Interrupts --
+   --------------------------
+
+   function Clock_For_Interrupts return CPU_Time is
+   begin
+      --  According to AI 0170-1, D.14(18.1/3), if Interrupt_Clocks_Supported
+      --  is set to False the function raises Program_Error.
+
+      raise Program_Error;
+      return CPU_Time_First;
+   end Clock_For_Interrupts;
+
+   -----------
+   -- Split --
+   -----------
+
+   procedure Split
+     (T  : CPU_Time;
+      SC : out Ada.Real_Time.Seconds_Count;
+      TS : out Ada.Real_Time.Time_Span)
+   is
+   begin
+      Ada.Real_Time.Split (Ada.Real_Time.Time (T), SC, TS);
+   end Split;
+
+   -------------
+   -- Time_Of --
+   -------------
+
+   function Time_Of
+     (SC : Ada.Real_Time.Seconds_Count;
+      TS : Ada.Real_Time.Time_Span := Ada.Real_Time.Time_Span_Zero)
+      return CPU_Time
+   is
+   begin
+      return CPU_Time (Ada.Real_Time.Time_Of (SC, TS));
+   end Time_Of;
+
+end Ada.Execution_Time;