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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 Ada Core Technologies, 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. --
-- --
------------------------------------------------------------------------------
-- 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;
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