| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNU ADA RUNTIME 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) 2002-2003 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 2, 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. See the GNU General Public License -- |
| -- for more details. You should have received a copy of the GNU General -- |
| -- Public License distributed with GNAT; see file COPYING. If not, write -- |
| -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- |
| -- MA 02111-1307, USA. -- |
| -- -- |
| -- As a special exception, if other files instantiate generics from this -- |
| -- unit, or you link this unit with other files to produce an executable, -- |
| -- this unit does not by itself cause the resulting executable to be -- |
| -- covered by the GNU General Public License. This exception does not -- |
| -- however invalidate any other reasons why the executable file might be -- |
| -- covered by the GNU Public License. -- |
| -- -- |
| -- 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.Storage_Elements; use System.Storage_Elements; |
| with Ada.Unchecked_Conversion; use Ada; |
| |
| package body System.Generic_Vector_Operations is |
| VU : constant Address := Vectors.Vector'Size / Storage_Unit; |
| EU : constant Address := Element_Array'Component_Size / Storage_Unit; |
| |
| ---------------------- |
| -- 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 |
| |
| Unaligned : constant Boolean := (RA or XA or YA) mod VU /= 0; |
| -- False iff one or more argument addresses is not aligned |
| |
| type Vector_Ptr is access all Vectors.Vector; |
| type Element_Ptr is access all Element; |
| |
| function VP is new Unchecked_Conversion (Address, Vector_Ptr); |
| function EP is new Unchecked_Conversion (Address, Element_Ptr); |
| |
| SA : constant Address := XA + ((Length + 0) / VU * VU |
| and (Boolean'Pos (Unaligned) - Address'(1))); |
| -- 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 := XA + VU; |
| YA := YA + VU; |
| RA := RA + VU; |
| end loop; |
| |
| while XA < X + Length loop |
| EP (RA).all := Element_Op (EP (XA).all, EP (YA).all); |
| XA := XA + EU; |
| YA := YA + EU; |
| RA := 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 |
| |
| Unaligned : constant Boolean := (RA or XA) mod VU /= 0; |
| -- False iff one or more argument addresses is not aligned |
| |
| type Vector_Ptr is access all Vectors.Vector; |
| type Element_Ptr is access all Element; |
| |
| function VP is new Unchecked_Conversion (Address, Vector_Ptr); |
| function EP is new Unchecked_Conversion (Address, Element_Ptr); |
| |
| SA : constant Address := XA + ((Length + 0) / VU * VU |
| and (Boolean'Pos (Unaligned) - Address'(1))); |
| -- First address of argument X to start serial processing |
| |
| begin |
| while XA < SA loop |
| VP (RA).all := Vector_Op (VP (XA).all); |
| XA := XA + VU; |
| RA := RA + VU; |
| end loop; |
| |
| while XA < X + Length loop |
| EP (RA).all := Element_Op (EP (XA).all); |
| XA := XA + EU; |
| RA := RA + EU; |
| end loop; |
| end Unary_Operation; |
| |
| end System.Generic_Vector_Operations; |
