134 lines
5.6 KiB
Ada
134 lines
5.6 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- 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 --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 2002-2009, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with System; use System;
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with System.Address_Operations; use System.Address_Operations;
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with System.Storage_Elements; use System.Storage_Elements;
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with Ada.Unchecked_Conversion;
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package body System.Generic_Vector_Operations is
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IU : constant Integer := Integer (Storage_Unit);
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VU : constant Address := Address (Vectors.Vector'Size / IU);
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EU : constant Address := Address (Element_Array'Component_Size / IU);
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----------------------
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-- Binary_Operation --
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----------------------
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procedure Binary_Operation
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(R, X, Y : System.Address;
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Length : System.Storage_Elements.Storage_Count)
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is
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RA : Address := R;
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XA : Address := X;
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YA : Address := Y;
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-- Address of next element to process in R, X and Y
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VI : constant Integer_Address := To_Integer (VU);
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Unaligned : constant Integer_Address :=
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Boolean'Pos (ModA (OrA (OrA (RA, XA), YA), VU) /= 0) - 1;
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-- Zero iff one or more argument addresses is not aligned, else all 1's
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type Vector_Ptr is access all Vectors.Vector;
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type Element_Ptr is access all Element;
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function VP is new Ada.Unchecked_Conversion (Address, Vector_Ptr);
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function EP is new Ada.Unchecked_Conversion (Address, Element_Ptr);
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SA : constant Address :=
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AddA (XA, To_Address
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((Integer_Address (Length) / VI * VI) and Unaligned));
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-- First address of argument X to start serial processing
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begin
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while XA < SA loop
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VP (RA).all := Vector_Op (VP (XA).all, VP (YA).all);
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XA := AddA (XA, VU);
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YA := AddA (YA, VU);
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RA := AddA (RA, VU);
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end loop;
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while XA < X + Length loop
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EP (RA).all := Element_Op (EP (XA).all, EP (YA).all);
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XA := AddA (XA, EU);
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YA := AddA (YA, EU);
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RA := AddA (RA, EU);
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end loop;
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end Binary_Operation;
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----------------------
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-- Unary_Operation --
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----------------------
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procedure Unary_Operation
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(R, X : System.Address;
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Length : System.Storage_Elements.Storage_Count)
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is
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RA : Address := R;
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XA : Address := X;
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-- Address of next element to process in R and X
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VI : constant Integer_Address := To_Integer (VU);
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Unaligned : constant Integer_Address :=
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Boolean'Pos (ModA (OrA (RA, XA), VU) /= 0) - 1;
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-- Zero iff one or more argument addresses is not aligned, else all 1's
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type Vector_Ptr is access all Vectors.Vector;
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type Element_Ptr is access all Element;
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function VP is new Ada.Unchecked_Conversion (Address, Vector_Ptr);
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function EP is new Ada.Unchecked_Conversion (Address, Element_Ptr);
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SA : constant Address :=
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AddA (XA, To_Address
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((Integer_Address (Length) / VI * VI) and Unaligned));
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-- First address of argument X to start serial processing
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begin
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while XA < SA loop
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VP (RA).all := Vector_Op (VP (XA).all);
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XA := AddA (XA, VU);
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RA := AddA (RA, VU);
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end loop;
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while XA < X + Length loop
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EP (RA).all := Element_Op (EP (XA).all);
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XA := AddA (XA, EU);
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RA := AddA (RA, EU);
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end loop;
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end Unary_Operation;
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end System.Generic_Vector_Operations;
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