------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- S Y S T E M . P O W T E N _ L L F -- -- -- -- S p e c -- -- -- -- Copyright (C) 1992-2021, 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 -- -- . -- -- -- -- 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_LLF is pragma Pure; Maxpow_Exact : constant := (if Long_Long_Float'Machine_Mantissa = 64 then 27 else 22); -- Largest power of ten exactly representable with Long_Long_Float. It is -- equal to floor (M * log 2 / log 5), when M is the size of the mantissa -- assumed to be either 64 for IEEE Extended or 53 for IEEE Double. Maxpow : constant := Maxpow_Exact * 2; -- Largest power of ten exactly representable with a double Long_Long_Float Powten : constant array (0 .. 54, 1 .. 2) of Long_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_Long_Float'Machine (1.0E+23)), 24 => (1.0E+24, 1.0E+24 - Long_Long_Float'Machine (1.0E+24)), 25 => (1.0E+25, 1.0E+25 - Long_Long_Float'Machine (1.0E+25)), 26 => (1.0E+26, 1.0E+26 - Long_Long_Float'Machine (1.0E+26)), 27 => (1.0E+27, 1.0E+27 - Long_Long_Float'Machine (1.0E+27)), 28 => (1.0E+28, 1.0E+28 - Long_Long_Float'Machine (1.0E+28)), 29 => (1.0E+29, 1.0E+29 - Long_Long_Float'Machine (1.0E+29)), 30 => (1.0E+30, 1.0E+30 - Long_Long_Float'Machine (1.0E+30)), 31 => (1.0E+31, 1.0E+31 - Long_Long_Float'Machine (1.0E+31)), 32 => (1.0E+32, 1.0E+32 - Long_Long_Float'Machine (1.0E+32)), 33 => (1.0E+33, 1.0E+33 - Long_Long_Float'Machine (1.0E+33)), 34 => (1.0E+34, 1.0E+34 - Long_Long_Float'Machine (1.0E+34)), 35 => (1.0E+35, 1.0E+35 - Long_Long_Float'Machine (1.0E+35)), 36 => (1.0E+36, 1.0E+36 - Long_Long_Float'Machine (1.0E+36)), 37 => (1.0E+37, 1.0E+37 - Long_Long_Float'Machine (1.0E+37)), 38 => (1.0E+38, 1.0E+38 - Long_Long_Float'Machine (1.0E+38)), 39 => (1.0E+39, 1.0E+39 - Long_Long_Float'Machine (1.0E+39)), 40 => (1.0E+40, 1.0E+40 - Long_Long_Float'Machine (1.0E+40)), 41 => (1.0E+41, 1.0E+41 - Long_Long_Float'Machine (1.0E+41)), 42 => (1.0E+42, 1.0E+42 - Long_Long_Float'Machine (1.0E+42)), 43 => (1.0E+43, 1.0E+43 - Long_Long_Float'Machine (1.0E+43)), 44 => (1.0E+44, 1.0E+44 - Long_Long_Float'Machine (1.0E+44)), 45 => (1.0E+45, 1.0E+45 - Long_Long_Float'Machine (1.0E+45)), 46 => (1.0E+46, 1.0E+46 - Long_Long_Float'Machine (1.0E+46)), 47 => (1.0E+47, 1.0E+47 - Long_Long_Float'Machine (1.0E+47)), 48 => (1.0E+48, 1.0E+48 - Long_Long_Float'Machine (1.0E+48)), 49 => (1.0E+49, 1.0E+49 - Long_Long_Float'Machine (1.0E+49)), 50 => (1.0E+50, 1.0E+50 - Long_Long_Float'Machine (1.0E+50)), 51 => (1.0E+51, 1.0E+51 - Long_Long_Float'Machine (1.0E+51)), 52 => (1.0E+52, 1.0E+52 - Long_Long_Float'Machine (1.0E+52)), 53 => (1.0E+53, 1.0E+53 - Long_Long_Float'Machine (1.0E+53)), 54 => (1.0E+54, 1.0E+54 - Long_Long_Float'Machine (1.0E+54))); end System.Powten_LLF;