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Diffstat (limited to 'gcc/ada/s-geveop.adb')
| -rw-r--r-- | gcc/ada/s-geveop.adb | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/gcc/ada/s-geveop.adb b/gcc/ada/s-geveop.adb new file mode 100644 index 00000000000..f183a213b39 --- /dev/null +++ b/gcc/ada/s-geveop.adb @@ -0,0 +1,123 @@ +------------------------------------------------------------------------------ +-- -- +-- 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 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 : 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 : 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; |