------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- S Y S T E M . P O W T E N _ F L T -- -- -- -- S p e c -- -- -- -- Copyright (C) 2020-2022, 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_Flt is pragma Pure; Maxpow_Exact : constant := 10; -- Largest power of ten exactly representable with Float. It is equal to -- floor (M * log 2 / log 5), when M is the size of the mantissa (24). Maxpow : constant := Maxpow_Exact * 2; -- Largest power of ten exactly representable with a double Float Powten : constant array (0 .. Maxpow, 1 .. 2) of Float := [00 => [1.0E+00, 0.0], 01 => [1.0E+01, 0.0], 02 => [1.0E+02, 0.0], 03 => [1.0E+03, 0.0], 04 => [1.0E+04, 0.0], 05 => [1.0E+05, 0.0], 06 => [1.0E+06, 0.0], 07 => [1.0E+07, 0.0], 08 => [1.0E+08, 0.0], 09 => [1.0E+09, 0.0], 10 => [1.0E+10, 0.0], 11 => [1.0E+11, 1.0E+11 - Float'Machine (1.0E+11)], 12 => [1.0E+12, 1.0E+12 - Float'Machine (1.0E+12)], 13 => [1.0E+13, 1.0E+13 - Float'Machine (1.0E+13)], 14 => [1.0E+14, 1.0E+14 - Float'Machine (1.0E+14)], 15 => [1.0E+15, 1.0E+15 - Float'Machine (1.0E+15)], 16 => [1.0E+16, 1.0E+16 - Float'Machine (1.0E+16)], 17 => [1.0E+17, 1.0E+17 - Float'Machine (1.0E+17)], 18 => [1.0E+18, 1.0E+18 - Float'Machine (1.0E+18)], 19 => [1.0E+19, 1.0E+19 - Float'Machine (1.0E+19)], 20 => [1.0E+20, 1.0E+20 - Float'Machine (1.0E+20)]]; end System.Powten_Flt;