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+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
+-- --
+-- S Y S T E M . G E N E R I C _ V E C T O R _ O P E R A T I O N S --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 2002-2009, 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; use System;
+with System.Address_Operations; use System.Address_Operations;
+with System.Storage_Elements; use System.Storage_Elements;
+
+with Ada.Unchecked_Conversion;
+
+package body System.Generic_Vector_Operations is
+
+ IU : constant Integer := Integer (Storage_Unit);
+ VU : constant Address := Address (Vectors.Vector'Size / IU);
+ EU : constant Address := Address (Element_Array'Component_Size / IU);
+
+ ----------------------
+ -- Binary_Operation --
+ ----------------------
+
+ procedure Binary_Operation
+ (R, X, Y : System.Address;
+ Length : System.Storage_Elements.Storage_Count)
+ is
+ RA : Address := R;
+ XA : Address := X;
+ YA : Address := Y;
+ -- Address of next element to process in R, X and Y
+
+ VI : constant Integer_Address := To_Integer (VU);
+
+ Unaligned : constant Integer_Address :=
+ Boolean'Pos (ModA (OrA (OrA (RA, XA), YA), VU) /= 0) - 1;
+ -- Zero iff one or more argument addresses is not aligned, else all 1's
+
+ type Vector_Ptr is access all Vectors.Vector;
+ type Element_Ptr is access all Element;
+
+ function VP is new Ada.Unchecked_Conversion (Address, Vector_Ptr);
+ function EP is new Ada.Unchecked_Conversion (Address, Element_Ptr);
+
+ SA : constant Address :=
+ AddA (XA, To_Address
+ ((Integer_Address (Length) / VI * VI) and Unaligned));
+ -- First address of argument X to start serial processing
+
+ begin
+ while XA < SA loop
+ VP (RA).all := Vector_Op (VP (XA).all, VP (YA).all);
+ XA := AddA (XA, VU);
+ YA := AddA (YA, VU);
+ RA := AddA (RA, VU);
+ end loop;
+
+ while XA < X + Length loop
+ EP (RA).all := Element_Op (EP (XA).all, EP (YA).all);
+ XA := AddA (XA, EU);
+ YA := AddA (YA, EU);
+ RA := AddA (RA, EU);
+ end loop;
+ end Binary_Operation;
+
+ ----------------------
+ -- Unary_Operation --
+ ----------------------
+
+ procedure Unary_Operation
+ (R, X : System.Address;
+ Length : System.Storage_Elements.Storage_Count)
+ is
+ RA : Address := R;
+ XA : Address := X;
+ -- Address of next element to process in R and X
+
+ VI : constant Integer_Address := To_Integer (VU);
+
+ Unaligned : constant Integer_Address :=
+ Boolean'Pos (ModA (OrA (RA, XA), VU) /= 0) - 1;
+ -- Zero iff one or more argument addresses is not aligned, else all 1's
+
+ type Vector_Ptr is access all Vectors.Vector;
+ type Element_Ptr is access all Element;
+
+ function VP is new Ada.Unchecked_Conversion (Address, Vector_Ptr);
+ function EP is new Ada.Unchecked_Conversion (Address, Element_Ptr);
+
+ SA : constant Address :=
+ AddA (XA, To_Address
+ ((Integer_Address (Length) / VI * VI) and Unaligned));
+ -- First address of argument X to start serial processing
+
+ begin
+ while XA < SA loop
+ VP (RA).all := Vector_Op (VP (XA).all);
+ XA := AddA (XA, VU);
+ RA := AddA (RA, VU);
+ end loop;
+
+ while XA < X + Length loop
+ EP (RA).all := Element_Op (EP (XA).all);
+ XA := AddA (XA, EU);
+ RA := AddA (RA, EU);
+ end loop;
+ end Unary_Operation;
+
+end System.Generic_Vector_Operations;