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author | Ben Cheng <bccheng@google.com> | 2012-10-01 10:30:31 -0700 |
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committer | Ben Cheng <bccheng@google.com> | 2012-10-01 10:30:31 -0700 |
commit | 82bcbebce43f0227f506d75a5b764b6847041bae (patch) | |
tree | fe9f8597b48a430c4daeb5123e3e8eb28e6f9da9 /gcc-4.7/gcc/ada/s-mantis.adb | |
parent | 3c052de3bb16ac53b6b6ed659ec7557eb84c7590 (diff) | |
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Initial check-in of gcc 4.7.2.
Change-Id: I4a2f5a921c21741a0e18bda986d77e5f1bef0365
Diffstat (limited to 'gcc-4.7/gcc/ada/s-mantis.adb')
-rw-r--r-- | gcc-4.7/gcc/ada/s-mantis.adb | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/gcc-4.7/gcc/ada/s-mantis.adb b/gcc-4.7/gcc/ada/s-mantis.adb new file mode 100644 index 000000000..035362107 --- /dev/null +++ b/gcc-4.7/gcc/ada/s-mantis.adb @@ -0,0 +1,53 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- S Y S T E M . M A N T I S S A -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1996-2009 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 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; |