| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M . M A N T I S S A -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1996-2014, 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 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. -- |
| -- -- |
| -- 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. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| package body System.Mantissa is |
| |
| -------------------- |
| -- Mantissa_Value -- |
| -------------------- |
| |
| function Mantissa_Value (First, Last : Integer) return Natural is |
| Result : Natural := 0; |
| |
| Val : Integer := Integer'Max (abs First - 1, abs Last); |
| -- Note: First-1 allows for twos complement largest neg number |
| |
| begin |
| while Val /= 0 loop |
| Val := Val / 2; |
| Result := Result + 1; |
| end loop; |
| |
| return Result; |
| end Mantissa_Value; |
| |
| end System.Mantissa; |
