| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- S Y S T E M . P O W T E N _ L F L T -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 2020-2021, 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. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This package provides a powers of ten table used for real conversions |
| |
| package System.Powten_LFlt is |
| pragma Pure; |
| |
| Maxpow_Exact : constant := 22; |
| -- Largest power of ten exactly representable with Long_Float. It is equal |
| -- to floor (M * log 2 / log 5), when M is the size of the mantissa (53). |
| |
| Maxpow : constant := Maxpow_Exact * 2; |
| -- Largest power of ten exactly representable with a double Long_Float |
| |
| Powten : constant array (0 .. Maxpow, 1 .. 2) of Long_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, 0.0), |
| 12 => (1.0E+12, 0.0), |
| 13 => (1.0E+13, 0.0), |
| 14 => (1.0E+14, 0.0), |
| 15 => (1.0E+15, 0.0), |
| 16 => (1.0E+16, 0.0), |
| 17 => (1.0E+17, 0.0), |
| 18 => (1.0E+18, 0.0), |
| 19 => (1.0E+19, 0.0), |
| 20 => (1.0E+20, 0.0), |
| 21 => (1.0E+21, 0.0), |
| 22 => (1.0E+22, 0.0), |
| 23 => (1.0E+23, 1.0E+23 - Long_Float'Machine (1.0E+23)), |
| 24 => (1.0E+24, 1.0E+24 - Long_Float'Machine (1.0E+24)), |
| 25 => (1.0E+25, 1.0E+25 - Long_Float'Machine (1.0E+25)), |
| 26 => (1.0E+26, 1.0E+26 - Long_Float'Machine (1.0E+26)), |
| 27 => (1.0E+27, 1.0E+27 - Long_Float'Machine (1.0E+27)), |
| 28 => (1.0E+28, 1.0E+28 - Long_Float'Machine (1.0E+28)), |
| 29 => (1.0E+29, 1.0E+29 - Long_Float'Machine (1.0E+29)), |
| 30 => (1.0E+30, 1.0E+30 - Long_Float'Machine (1.0E+30)), |
| 31 => (1.0E+31, 1.0E+31 - Long_Float'Machine (1.0E+31)), |
| 32 => (1.0E+32, 1.0E+32 - Long_Float'Machine (1.0E+32)), |
| 33 => (1.0E+33, 1.0E+33 - Long_Float'Machine (1.0E+33)), |
| 34 => (1.0E+34, 1.0E+34 - Long_Float'Machine (1.0E+34)), |
| 35 => (1.0E+35, 1.0E+35 - Long_Float'Machine (1.0E+35)), |
| 36 => (1.0E+36, 1.0E+36 - Long_Float'Machine (1.0E+36)), |
| 37 => (1.0E+37, 1.0E+37 - Long_Float'Machine (1.0E+37)), |
| 38 => (1.0E+38, 1.0E+38 - Long_Float'Machine (1.0E+38)), |
| 39 => (1.0E+39, 1.0E+39 - Long_Float'Machine (1.0E+39)), |
| 40 => (1.0E+40, 1.0E+40 - Long_Float'Machine (1.0E+40)), |
| 41 => (1.0E+41, 1.0E+41 - Long_Float'Machine (1.0E+41)), |
| 42 => (1.0E+42, 1.0E+42 - Long_Float'Machine (1.0E+42)), |
| 43 => (1.0E+43, 1.0E+43 - Long_Float'Machine (1.0E+43)), |
| 44 => (1.0E+44, 1.0E+44 - Long_Float'Machine (1.0E+44))); |
| |
| end System.Powten_LFlt; |