From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/ada/s-powtab.ads | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 gcc/ada/s-powtab.ads (limited to 'gcc/ada/s-powtab.ads') diff --git a/gcc/ada/s-powtab.ads b/gcc/ada/s-powtab.ads new file mode 100644 index 000000000..ea1820b13 --- /dev/null +++ b/gcc/ada/s-powtab.ads @@ -0,0 +1,70 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y S T E M . P O W T E N _ T A B L E -- +-- -- +-- S p e c -- +-- -- +-- 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 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 -- +-- . -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This package provides a powers of ten table used for real conversions + +package System.Powten_Table is + pragma Pure; + + Maxpow : constant := 22; + -- The number of entries in this table is chosen to include powers of ten + -- that are exactly representable with long_long_float. Assuming that on + -- all targets we have 53 bits of mantissa for the type, the upper bound is + -- given by 53/(log 5). If the scaling factor for a string is greater than + -- Maxpow, it can be obtained by several multiplications, which is less + -- efficient than with a bigger table, but avoids anomalies at end points. + + Powten : constant array (0 .. Maxpow) of Long_Long_Float := + (00 => 1.0E+00, + 01 => 1.0E+01, + 02 => 1.0E+02, + 03 => 1.0E+03, + 04 => 1.0E+04, + 05 => 1.0E+05, + 06 => 1.0E+06, + 07 => 1.0E+07, + 08 => 1.0E+08, + 09 => 1.0E+09, + 10 => 1.0E+10, + 11 => 1.0E+11, + 12 => 1.0E+12, + 13 => 1.0E+13, + 14 => 1.0E+14, + 15 => 1.0E+15, + 16 => 1.0E+16, + 17 => 1.0E+17, + 18 => 1.0E+18, + 19 => 1.0E+19, + 20 => 1.0E+20, + 21 => 1.0E+21, + 22 => 1.0E+22); + +end System.Powten_Table; -- cgit v1.2.3