------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- S Y S T E M . P O W T E N _ L L F -- -- -- -- S p e c -- -- -- -- Copyright (C) 1992-2024, 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 tables of powers 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 five 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. -- It also works for any number of the form 5*(2**N) and in particular 10. Maxpow : constant := Maxpow_Exact * 2; -- Largest power of five exactly representable with double Long_Long_Float Powfive : constant array (0 .. 54, 1 .. 2) of Long_Long_Float := [00 => [5.0**00, 0.0], 01 => [5.0**01, 0.0], 02 => [5.0**02, 0.0], 03 => [5.0**03, 0.0], 04 => [5.0**04, 0.0], 05 => [5.0**05, 0.0], 06 => [5.0**06, 0.0], 07 => [5.0**07, 0.0], 08 => [5.0**08, 0.0], 09 => [5.0**09, 0.0], 10 => [5.0**10, 0.0], 11 => [5.0**11, 0.0], 12 => [5.0**12, 0.0], 13 => [5.0**13, 0.0], 14 => [5.0**14, 0.0], 15 => [5.0**15, 0.0], 16 => [5.0**16, 0.0], 17 => [5.0**17, 0.0], 18 => [5.0**18, 0.0], 19 => [5.0**19, 0.0], 20 => [5.0**20, 0.0], 21 => [5.0**21, 0.0], 22 => [5.0**22, 0.0], 23 => [5.0**23, 5.0**23 - Long_Long_Float'Machine (5.0**23)], 24 => [5.0**24, 5.0**24 - Long_Long_Float'Machine (5.0**24)], 25 => [5.0**25, 5.0**25 - Long_Long_Float'Machine (5.0**25)], 26 => [5.0**26, 5.0**26 - Long_Long_Float'Machine (5.0**26)], 27 => [5.0**27, 5.0**27 - Long_Long_Float'Machine (5.0**27)], 28 => [5.0**28, 5.0**28 - Long_Long_Float'Machine (5.0**28)], 29 => [5.0**29, 5.0**29 - Long_Long_Float'Machine (5.0**29)], 30 => [5.0**30, 5.0**30 - Long_Long_Float'Machine (5.0**30)], 31 => [5.0**31, 5.0**31 - Long_Long_Float'Machine (5.0**31)], 32 => [5.0**32, 5.0**32 - Long_Long_Float'Machine (5.0**32)], 33 => [5.0**33, 5.0**33 - Long_Long_Float'Machine (5.0**33)], 34 => [5.0**34, 5.0**34 - Long_Long_Float'Machine (5.0**34)], 35 => [5.0**35, 5.0**35 - Long_Long_Float'Machine (5.0**35)], 36 => [5.0**36, 5.0**36 - Long_Long_Float'Machine (5.0**36)], 37 => [5.0**37, 5.0**37 - Long_Long_Float'Machine (5.0**37)], 38 => [5.0**38, 5.0**38 - Long_Long_Float'Machine (5.0**38)], 39 => [5.0**39, 5.0**39 - Long_Long_Float'Machine (5.0**39)], 40 => [5.0**40, 5.0**40 - Long_Long_Float'Machine (5.0**40)], 41 => [5.0**41, 5.0**41 - Long_Long_Float'Machine (5.0**41)], 42 => [5.0**42, 5.0**42 - Long_Long_Float'Machine (5.0**42)], 43 => [5.0**43, 5.0**43 - Long_Long_Float'Machine (5.0**43)], 44 => [5.0**44, 5.0**44 - Long_Long_Float'Machine (5.0**44)], 45 => [5.0**45, 5.0**45 - Long_Long_Float'Machine (5.0**45)], 46 => [5.0**46, 5.0**46 - Long_Long_Float'Machine (5.0**46)], 47 => [5.0**47, 5.0**47 - Long_Long_Float'Machine (5.0**47)], 48 => [5.0**48, 5.0**48 - Long_Long_Float'Machine (5.0**48)], 49 => [5.0**49, 5.0**49 - Long_Long_Float'Machine (5.0**49)], 50 => [5.0**50, 5.0**50 - Long_Long_Float'Machine (5.0**50)], 51 => [5.0**51, 5.0**51 - Long_Long_Float'Machine (5.0**51)], 52 => [5.0**52, 5.0**52 - Long_Long_Float'Machine (5.0**52)], 53 => [5.0**53, 5.0**53 - Long_Long_Float'Machine (5.0**53)], 54 => [5.0**54, 5.0**54 - Long_Long_Float'Machine (5.0**54)]]; Powfive_100 : constant array (1 .. 2) of Long_Long_Float := [5.0**100, 5.0**100 - Long_Long_Float'Machine (5.0**100)]; Powfive_200 : constant array (1 .. 2) of Long_Long_Float := [5.0**200, 5.0**200 - Long_Long_Float'Machine (5.0**200)]; Powfive_300 : constant array (1 .. 2) of Long_Long_Float := [5.0**300, 5.0**300 - Long_Long_Float'Machine (5.0**300)]; 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;