+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- S Y S T E M . F A T _ G E N --
--- --
--- S p e c --
--- --
--- $Revision: 1.2.10.1 $
--- --
--- Copyright (C) 1992-2001 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. --
--- --
-------------------------------------------------------------------------------
-
--- This generic package provides a target independent implementation of the
--- floating-point attributes that denote functions. The implementations here
--- are portable, but very slow. The runtime contains a set of instantiations
--- of this package for all predefined floating-point types, and these should
--- be replaced by efficient assembly language code where possible.
-
-generic
- type T is digits <>;
-
-package System.Fat_Gen is
-pragma Pure (Fat_Gen);
-
- subtype UI is Integer;
- -- The runtime representation of universal integer for the purposes of
- -- this package is integer. The expander generates conversions for the
- -- actual type used. For functions returning universal integer, there
- -- is no problem, since the result always is in range of integer. For
- -- input arguments, the expander has to do some special casing to deal
- -- with the (very annoying!) cases of out of range values. If we used
- -- Long_Long_Integer to represent universal, then there would be no
- -- problem, but the resulting inefficiency would be annoying.
-
- function Adjacent (X, Towards : T) return T;
-
- function Ceiling (X : T) return T;
-
- function Compose (Fraction : T; Exponent : UI) return T;
-
- function Copy_Sign (Value, Sign : T) return T;
-
- function Exponent (X : T) return UI;
-
- function Floor (X : T) return T;
-
- function Fraction (X : T) return T;
-
- function Leading_Part (X : T; Radix_Digits : UI) return T;
-
- function Machine (X : T) return T;
-
- function Model (X : T) return T;
-
- function Pred (X : T) return T;
-
- function Remainder (X, Y : T) return T;
-
- function Rounding (X : T) return T;
-
- function Scaling (X : T; Adjustment : UI) return T;
-
- function Succ (X : T) return T;
-
- function Truncation (X : T) return T;
-
- function Unbiased_Rounding (X : T) return T;
-
- function Valid (X : access T) return Boolean;
- -- This function checks if the object of type T referenced by X
- -- is valid, and returns True/False accordingly. The parameter is
- -- passed by reference (access) here, as the object of type T may
- -- be an abnormal value that cannot be passed in a floating-point
- -- register, and the whole point of 'Valid is to prevent exceptions.
-
-private
- pragma Inline (Machine);
- pragma Inline (Model);
- pragma Inline_Always (Valid);
-
-end System.Fat_Gen;
projects / msp430-gcc.git / blobdiff