-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2006, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, 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, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- 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. --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
Invrad : constant T := 1.0 / Rad;
subtype Expbits is Integer range 0 .. 6;
- -- 2 ** (2 ** 7) might overflow. how big can radix-16 exponents get?
+ -- 2 ** (2 ** 7) might overflow. How big can radix-16 exponents get?
Log_Power : constant array (Expbits) of Integer := (1, 2, 4, 8, 16, 32, 64);
function Compose (Fraction : T; Exponent : UI) return T is
Arg_Frac : T;
Arg_Exp : UI;
+ pragma Unreferenced (Arg_Exp);
begin
Decompose (Fraction, Arg_Frac, Arg_Exp);
return Scaling (Arg_Frac, Exponent);
function Exponent (X : T) return UI is
X_Frac : T;
X_Exp : UI;
+ pragma Unreferenced (X_Frac);
begin
Decompose (X, X_Frac, X_Exp);
return X_Exp;
function Fraction (X : T) return T is
X_Frac : T;
X_Exp : UI;
+ pragma Unreferenced (X_Exp);
begin
Decompose (X, X_Frac, X_Exp);
return X_Frac;
B : T;
Arg : T;
P : T;
- Arg_Frac : T;
P_Frac : T;
Sign_X : T;
IEEE_Rem : T;
K : UI;
P_Even : Boolean;
+ Arg_Frac : T;
+ pragma Unreferenced (Arg_Frac);
+
begin
if Y = 0.0 then
raise Constraint_Error;
return X;
end if;
- -- Nonzero x. essentially, just multiply repeatedly by Rad ** (+-2**n)
+ -- Nonzero x essentially, just multiply repeatedly by Rad ** (+-2**n)
declare
Y : T := X;
-- since the exponent is going to be reduced.
-- Note that X_Frac has the same sign as X, so if X_Frac is -0.5,
- -- then we know that we have a ngeative number (and hence a
+ -- then we know that we have a negative number (and hence a
-- negative power of 2).
if X_Frac = -0.5 then
-- entire floating-point value. Do not take into account excessive
-- padding, as occurs on IA-64 where 80 bits floats get padded to 128
-- bits. In general, the exponent field cannot be larger than 15 bits,
- -- even for 128-bit floating-poin t types, so the final format size
+ -- even for 128-bit floating-point types, so the final format size
-- won't be larger than T'Mantissa + 16.
type Float_Rep is
array (Rep_Index range 0 .. Rep_Index (Rep_Words - 1)) of Float_Word;
pragma Suppress_Initialization (Float_Rep);
- -- This pragma supresses the generation of an initialization procedure
+ -- This pragma suppresses the generation of an initialization procedure
-- for type Float_Rep when operating in Initialize/Normalize_Scalars
-- mode. This is not just a matter of efficiency, but of functionality,
-- since Valid has a pragma Inline_Always, which is not permitted if
begin
if T'Denorm then
- -- All denormalized numbers are valid, so only invalid numbers are
- -- overflows and NaN's, both with exponent = Emax + 1.
+ -- All denormalized numbers are valid, so the only invalid numbers
+ -- are overflows and NaNs, both with exponent = Emax + 1.
return E /= IEEE_Emax + 1;
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