gas/flonum-konst.c

   1 /* flonum_const.c - Useful Flonum constants
   2    Copyright (C) 1987-2023 Free Software Foundation, Inc.
   3
   4    This file is part of GAS, the GNU Assembler.
   5
   6    GAS is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    GAS is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GAS; see the file COPYING.  If not, write to the Free
  18    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  19    02110-1301, USA.  */
  20
  21 #include "ansidecl.h"
  22 #include "flonum.h"
  23 /* JF:  I added the last entry to this table, and I'm not
  24    sure if its right or not.  Could go either way.  I wish
  25    I really understood this stuff.  */
  26
  27 const int table_size_of_flonum_powers_of_ten = 13;
  28
  29 static const LITTLENUM_TYPE zero[] = {
  30   1
  31 };
  32
  33 /***********************************************************************\
  34  *                                                                      *
  35  *      Warning: the low order bits may be WRONG here.                  *
  36  *      I took this from a suspect bc(1) script.                        *
  37  *      "minus_X"[] is supposed to be 10^(2^-X) expressed in base 2^16. *
  38  *      The radix point is just AFTER the highest element of the []     *
  39  *                                                                      *
  40  *      Because bc rounds DOWN for printing (I think), the lowest       *
  41  *      significance littlenums should probably have 1 added to them.   *
  42  *                                                                      *
  43  \***********************************************************************/
  44
  45 /* JF:  If this equals 6553/(2^16)+39321/(2^32)+...  it approaches .1 */
  46 static const LITTLENUM_TYPE minus_1[] = {
  47   39322, 39321, 39321, 39321, 39321, 39321, 39321, 39321, 39321, 39321,
  48   39321, 39321, 39321, 39321, 39321, 39321, 39321, 39321, 39321, 6553
  49 };
  50
  51 static const LITTLENUM_TYPE plus_1[] = {
  52   10
  53 };
  54
  55 /* JF:  If this equals 655/(2^16) + 23592/(2^32) + ... it approaches .01 */
  56 static const LITTLENUM_TYPE minus_2[] = {
  57   10486, 36700, 62914, 23592, 49807, 10485, 36700, 62914, 23592, 49807,
  58   10485, 36700, 62914, 23592, 49807, 10485, 36700, 62914, 23592, 655
  59 };
  60
  61 static const LITTLENUM_TYPE plus_2[] = {
  62   100
  63 };
  64
  65 /* This approaches .0001 */
  66 static const LITTLENUM_TYPE minus_3[] = {
  67   52534, 20027, 37329, 65116, 64067, 60397, 14784, 18979, 33659, 19503,
  68   2726, 9542, 629, 2202, 40475, 10590, 4299, 47815, 36280, 6
  69 };
  70
  71 static const LITTLENUM_TYPE plus_3[] = {
  72   10000
  73 };
  74
  75 /* JF: this approaches 1e-8 */
  76 static const LITTLENUM_TYPE minus_4[] = {
  77   22517, 49501, 54293, 19424, 60699, 6716, 24348, 22618, 23904, 21327,
  78   3919, 44703, 19149, 28803, 48959, 6259, 50273, 62237, 42
  79 };
  80
  81 /* This equals 1525 * 2^16 + 57600 */
  82 static const LITTLENUM_TYPE plus_4[] = {
  83   57600, 1525
  84 };
  85
  86 /* This approaches 1e-16 */
  87 static const LITTLENUM_TYPE minus_5[] = {
  88   22199, 45957, 17005, 26266, 10526, 16260, 55017, 35680, 40443, 19789,
  89   17356, 30195, 55905, 28426, 63010, 44197, 1844
  90 };
  91
  92 static const LITTLENUM_TYPE plus_5[] = {
  93   28609, 34546, 35
  94 };
  95
  96 static const LITTLENUM_TYPE minus_6[] = {
  97   30926, 26518, 13110, 43018, 54982, 48258, 24658, 15209, 63366, 11929,
  98   20069, 43857, 60487, 51
  99 };
 100
 101 static const LITTLENUM_TYPE plus_6[] = {
 102   61313, 34220, 16731, 11629, 1262
 103 };
 104
 105 static const LITTLENUM_TYPE minus_7[] = {
 106   29819, 14733, 21490, 40602, 31315, 65186, 2695
 107 };
 108
 109 static const LITTLENUM_TYPE plus_7[] = {
 110   7937, 49002, 60772, 28216, 38893, 55975, 63988, 59711, 20227, 24
 111 };
 112
 113 static const LITTLENUM_TYPE minus_8[] = {
 114   27579, 64807, 12543, 794, 13907, 61297, 12013, 64360, 15961, 20566,
 115   24178, 15922, 59427, 110
 116 };
 117
 118 static const LITTLENUM_TYPE plus_8[] = {
 119   15873, 11925, 39177, 991, 14589, 3861, 58415, 9076, 62956, 54223,
 120   56328, 50180, 45274, 48333, 32537, 42547, 9731, 59679, 590
 121 };
 122
 123 static const LITTLENUM_TYPE minus_9[] = {
 124   11042, 8464, 58971, 63429, 6022, 63485, 5500, 53464, 47545, 50068,
 125   56988, 22819, 49708, 54493, 9920, 47667, 40409, 35764, 10383, 54466,
 126   32702, 17493, 32420, 34382, 22750, 20681, 12300
 127 };
 128
 129 static const LITTLENUM_TYPE plus_9[] = {
 130   20678, 27614, 28272, 53066, 55311, 54677, 29038, 9906, 26288, 44486,
 131   13860, 7445, 54106, 15426, 21518, 25599, 29632, 52309, 61207, 26105,
 132   10482, 21948, 51191, 32988, 60892, 62574, 61390, 24540, 21495, 5
 133 };
 134
 135 static const LITTLENUM_TYPE minus_10[] = {
 136   6214, 48771, 23471, 30163, 31763, 38013, 57001, 11770, 18263, 36366,
 137   20742, 45086, 56969, 53231, 37856, 55814, 38057, 15692, 46761, 8713,
 138   6102, 20083, 8269, 11839, 11571, 50963, 15649, 11698, 40675, 2308
 139 };
 140
 141 static const LITTLENUM_TYPE plus_10[] = {
 142   63839, 36576, 45712, 44516, 37803, 29482, 4966, 30556, 37961, 23310,
 143   27070, 44972, 29507, 48257, 45209, 7494, 17831, 38728, 41577, 29443,
 144   36016, 7955, 35339, 35479, 36011, 14553, 49618, 5588, 25396, 28
 145 };
 146
 147 static const LITTLENUM_TYPE minus_11[] = {
 148   16663, 56882, 61983, 7804, 36555, 32060, 34502, 1000, 14356, 21681,
 149   6605, 34767, 51411, 59048, 53614, 39850, 30079, 6496, 6846, 26841,
 150   40778, 19578, 59899, 44085, 54016, 24259, 11232, 21229, 21313, 81
 151 };
 152
 153 static const LITTLENUM_TYPE plus_11[] = {
 154   92, 9054, 62707, 17993, 7821, 56838, 13992, 21321, 29637, 48426,
 155   42982, 38668, 49574, 28820, 18200, 18927, 53979, 16219, 37484, 2516,
 156   44642, 14665, 11587, 41926, 13556, 23956, 54320, 6661, 55766, 805
 157 };
 158
 159 static const LITTLENUM_TYPE minus_12[] = {
 160   33202, 45969, 58804, 56734, 16482, 26007, 44984, 49334, 31007, 32944,
 161   44517, 63329, 47131, 15291, 59465, 2264, 23218, 11829, 59771, 38798,
 162   31051, 28748, 23129, 40541, 41562, 35108, 50620, 59014, 51817, 6613
 163 };
 164
 165 static const LITTLENUM_TYPE plus_12[] = {
 166   10098, 37922, 58070, 7432, 10470, 63465, 23718, 62190, 47420, 7009,
 167   38443, 4587, 45596, 38472, 52129, 52779, 29012, 13559, 48688, 31678,
 168   41753, 58662, 10668, 36067, 29906, 56906, 21461, 46556, 59571, 9
 169 };
 170
 171 static const LITTLENUM_TYPE minus_13[] = {
 172   45309, 27592, 37144, 34637, 34328, 41671, 34620, 24135, 53401, 22112,
 173   21576, 45147, 39310, 44051, 48572, 3676, 46544, 59768, 33350, 2323,
 174   49524, 61568, 3903, 36487, 36356, 30903, 14975, 9035, 29715, 667
 175 };
 176
 177 static const LITTLENUM_TYPE plus_13[] = {
 178   18788, 16960, 6318, 45685, 55400, 46230, 35794, 25588, 7253, 55541,
 179   49716, 59760, 63592, 8191, 63765, 58530, 44667, 13294, 10001, 55586,
 180   47887, 18738, 9509, 40896, 42506, 52580, 4171, 325, 12329, 98
 181 };
 182
 183 /* Shut up complaints about differing pointer types.  They only differ
 184    in the const attribute, but there isn't any easy way to do this
 185    */
 186 #define X (LITTLENUM_TYPE *)
 187
 188 const FLONUM_TYPE flonum_negative_powers_of_ten[] = {
 189   {X zero, X zero, X zero, 0, '+'},
 190   {X minus_1, X minus_1 + 19, X minus_1 + 19, -20, '+'},
 191   {X minus_2, X minus_2 + 19, X minus_2 + 19, -20, '+'},
 192   {X minus_3, X minus_3 + 19, X minus_3 + 19, -20, '+'},
 193   {X minus_4, X minus_4 + 18, X minus_4 + 18, -20, '+'},
 194   {X minus_5, X minus_5 + 16, X minus_5 + 16, -20, '+'},
 195   {X minus_6, X minus_6 + 13, X minus_6 + 13, -20, '+'},
 196   {X minus_7, X minus_7 + 6, X minus_7 + 6, -20, '+'},
 197   {X minus_8, X minus_8 + 13, X minus_8 + 13, -40, '+'},
 198   {X minus_9, X minus_9 + 26, X minus_9 + 26, -80, '+'},
 199   {X minus_10, X minus_10 + 29, X minus_10 + 29, -136, '+'},
 200   {X minus_11, X minus_11 + 29, X minus_11 + 29, -242, '+'},
 201   {X minus_12, X minus_12 + 29, X minus_12 + 29, -455, '+'},
 202   {X minus_13, X minus_13 + 29, X minus_13 + 29, -880, '+'},
 203 };
 204
 205 const FLONUM_TYPE flonum_positive_powers_of_ten[] = {
 206   {X zero, X zero, X zero, 0, '+'},
 207   {X plus_1, X plus_1 + 0, X plus_1 + 0, 0, '+'},
 208   {X plus_2, X plus_2 + 0, X plus_2 + 0, 0, '+'},
 209   {X plus_3, X plus_3 + 0, X plus_3 + 0, 0, '+'},
 210   {X plus_4, X plus_4 + 1, X plus_4 + 1, 0, '+'},
 211   {X plus_5, X plus_5 + 2, X plus_5 + 2, 1, '+'},
 212   {X plus_6, X plus_6 + 4, X plus_6 + 4, 2, '+'},
 213   {X plus_7, X plus_7 + 9, X plus_7 + 9, 4, '+'},
 214   {X plus_8, X plus_8 + 18, X plus_8 + 18, 8, '+'},
 215   {X plus_9, X plus_9 + 29, X plus_9 + 29, 24, '+'},
 216   {X plus_10, X plus_10 + 29, X plus_10 + 29, 77, '+'},
 217   {X plus_11, X plus_11 + 29, X plus_11 + 29, 183, '+'},
 218   {X plus_12, X plus_12 + 29, X plus_12 + 29, 396, '+'},
 219   {X plus_13, X plus_13 + 29, X plus_13 + 29, 821, '+'},
 220 };
 221
 222 #ifdef VMS
 223 void
 224 dummy1 ()
 225 {
 226 }
 227 #endif