-- --
-- S p e c --
-- --
--- --
--- Copyright (C) 1992-2001 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2007, 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- --
+-- ware Foundation; either version 3, 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. --
+-- Public License distributed with GNAT; see file COPYING3. If not, go to --
+-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
--- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
subtype R is Entity_Id;
-- The compile time representation of the floating-point root type
- type Rounding_Mode is (Floor, Ceiling, Round, Round_Even);
- for Rounding_Mode use (0, 1, 2, 3);
- -- Used to indicate rounding mode for Machine attribute
- -- Note that C code in gigi knows that Round_Even is 3
-
- Rounding_Was_Biased : Boolean;
- -- Set if last use of Machine rounded a halfway case away from zero
+ -- The following functions perform the operation implied by their name
+ -- which corresponds to the name of the attribute which they compute.
+ -- The arguments correspond to the attribute function arguments.
function Adjacent (RT : R; X, Towards : T) return T;
function Leading_Part (RT : R; X : T; Radix_Digits : UI) return T;
- function Machine (RT : R; X : T; Mode : Rounding_Mode) return T;
+ function Machine_Mantissa (RT : R) return Nat;
+
+ function Machine_Radix (RT : R) return Nat;
function Model (RT : R; X : T) return T;
function Unbiased_Rounding (RT : R; X : T) return T;
+ -- The following global declarations are used by the Machine attribute
+
+ type Rounding_Mode is (Floor, Ceiling, Round, Round_Even);
+ for Rounding_Mode use (0, 1, 2, 3);
+ -- Used to indicate rounding mode for Machine attribute
+ -- Note that C code in gigi knows that Round_Even is 3
+
+ -- The Machine attribute is special, in that it takes an extra argument
+ -- indicating the rounding mode, and also an argument Enode that is a
+ -- node used to post warnings (e.g. if asked to convert a negative zero
+ -- on a machine for which Signed_Zeros is False).
+
+ function Machine
+ (RT : R;
+ X : T;
+ Mode : Rounding_Mode;
+ Enode : Node_Id) return T;
+
end Eval_Fat;
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