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-------------------------------------------------------------------------------
--- --
--- GNAT RUN-TIME COMPONENTS --
--- --
--- G N A T . F L O A T _ C O N T R O L --
--- --
--- S p e c --
--- --
--- Copyright (C) 2000-2005 AdaCore --
--- --
--- 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, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, 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. --
--- --
-------------------------------------------------------------------------------
-
--- Control functions for floating-point unit
-
-package GNAT.Float_Control is
-
- procedure Reset;
- -- Reset the floating-point processor to the default state needed to get
- -- correct Ada semantics for the target. Some third party tools change
- -- the settings for the floating-point processor. Reset can be called
- -- to reset the floating-point processor into the mode required by GNAT
- -- for correct operation. Use this call after a call to foreign code if
- -- you suspect incorrect floating-point operation after the call.
- --
- -- For example under Windows NT some system DLL calls change the default
- -- FPU arithmetic to 64 bit precision mode. However, since in Ada 95 it
- -- is required to provide full access to the floating-point types of the
- -- architecture, GNAT requires full 80-bit precision mode, and Reset makes
- -- sure this mode is established.
- --
- -- Similarly on the PPC processor, it is important that overflow and
- -- underflow exceptions be disabled.
- --
- -- The call to Reset simply has no effect if the target environment
- -- does not give rise to such concerns.
-
-private
- pragma Import (C, Reset, "__gnat_init_float");
-
-end GNAT.Float_Control;