gas/flonum-konst.c

   1 /* flonum_const.c - Useful Flonum constants
   2    Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 2000, 2002,
   3    2005, 2007  Free Software Foundation, Inc.
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    any later version.
  11
  12    GAS is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GAS; see the file COPYING.  If not, write to the Free
  19    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
  20    02110-1301, USA.  */
  21
  22 #include "ansidecl.h"
  23 #include "flonum.h"
  24 /* JF:  I added the last entry to this table, and I'm not
  25    sure if its right or not.  Could go either way.  I wish
  26    I really understood this stuff.  */
  27
  28 const int table_size_of_flonum_powers_of_ten = 13;
  29
  30 static const LITTLENUM_TYPE zero[] = {
  31   1
  32 };
  33
  34 /***********************************************************************\
  35  *                                                                      *
  36  *      Warning: the low order bits may be WRONG here.                  *
  37  *      I took this from a suspect bc(1) script.                        *
  38  *      "minus_X"[] is supposed to be 10^(2^-X) expressed in base 2^16. *
  39  *      The radix point is just AFTER the highest element of the []     *
  40  *                                                                      *
  41  *      Because bc rounds DOWN for printing (I think), the lowest       *
  42  *      significance littlenums should probably have 1 added to them.   *
  43  *                                                                      *
  44  \***********************************************************************/
  45
  46 /* JF:  If this equals 6553/(2^16)+39321/(2^32)+...  it approaches .1 */
  47 static const LITTLENUM_TYPE minus_1[] = {
  48   39322, 39321, 39321, 39321, 39321, 39321, 39321, 39321, 39321, 39321,
  49   39321, 39321, 39321, 39321, 39321, 39321, 39321, 39321, 39321, 6553
  50 };
  51
  52 static const LITTLENUM_TYPE plus_1[] = {
  53   10
  54 };
  55
  56 /* JF:  If this equals 655/(2^16) + 23592/(2^32) + ... it approaches .01 */
  57 static const LITTLENUM_TYPE minus_2[] = {
  58   10486, 36700, 62914, 23592, 49807, 10485, 36700, 62914, 23592, 49807,
  59   10485, 36700, 62914, 23592, 49807, 10485, 36700, 62914, 23592, 655
  60 };
  61
  62 static const LITTLENUM_TYPE plus_2[] = {
  63   100
  64 };
  65
  66 /* This approaches .0001 */
  67 static const LITTLENUM_TYPE minus_3[] = {
  68   52534, 20027, 37329, 65116, 64067, 60397, 14784, 18979, 33659, 19503,
  69   2726, 9542, 629, 2202, 40475, 10590, 4299, 47815, 36280, 6
  70 };
  71
  72 static const LITTLENUM_TYPE plus_3[] = {
  73   10000
  74 };
  75
  76 /* JF: this approaches 1e-8 */
  77 static const LITTLENUM_TYPE minus_4[] = {
  78   22517, 49501, 54293, 19424, 60699, 6716, 24348, 22618, 23904, 21327,
  79   3919, 44703, 19149, 28803, 48959, 6259, 50273, 62237, 42
  80 };
  81
  82 /* This equals 1525 * 2^16 + 57600 */
  83 static const LITTLENUM_TYPE plus_4[] = {
  84   57600, 1525
  85 };
  86
  87 /* This approaches 1e-16 */
  88 static const LITTLENUM_TYPE minus_5[] = {
  89   22199, 45957, 17005, 26266, 10526, 16260, 55017, 35680, 40443, 19789,
  90   17356, 30195, 55905, 28426, 63010, 44197, 1844
  91 };
  92
  93 static const LITTLENUM_TYPE plus_5[] = {
  94   28609, 34546, 35
  95 };
  96
  97 static const LITTLENUM_TYPE minus_6[] = {
  98   30926, 26518, 13110, 43018, 54982, 48258, 24658, 15209, 63366, 11929,
  99   20069, 43857, 60487, 51
 100 };
 101
 102 static const LITTLENUM_TYPE plus_6[] = {
 103   61313, 34220, 16731, 11629, 1262
 104 };
 105
 106 static const LITTLENUM_TYPE minus_7[] = {
 107   29819, 14733, 21490, 40602, 31315, 65186, 2695
 108 };
 109
 110 static const LITTLENUM_TYPE plus_7[] = {
 111   7937, 49002, 60772, 28216, 38893, 55975, 63988, 59711, 20227, 24
 112 };
 113
 114 static const LITTLENUM_TYPE minus_8[] = {
 115   27579, 64807, 12543, 794, 13907, 61297, 12013, 64360, 15961, 20566,
 116   24178, 15922, 59427, 110
 117 };
 118
 119 static const LITTLENUM_TYPE plus_8[] = {
 120   15873, 11925, 39177, 991, 14589, 3861, 58415, 9076, 62956, 54223,
 121   56328, 50180, 45274, 48333, 32537, 42547, 9731, 59679, 590
 122 };
 123
 124 static const LITTLENUM_TYPE minus_9[] = {
 125   11042, 8464, 58971, 63429, 6022, 63485, 5500, 53464, 47545, 50068,
 126   56988, 22819, 49708, 54493, 9920, 47667, 40409, 35764, 10383, 54466,
 127   32702, 17493, 32420, 34382, 22750, 20681, 12300
 128 };
 129
 130 static const LITTLENUM_TYPE plus_9[] = {
 131   20678, 27614, 28272, 53066, 55311, 54677, 29038, 9906, 26288, 44486,
 132   13860, 7445, 54106, 15426, 21518, 25599, 29632, 52309, 61207, 26105,
 133   10482, 21948, 51191, 32988, 60892, 62574, 61390, 24540, 21495, 5
 134 };
 135
 136 static const LITTLENUM_TYPE minus_10[] = {
 137   6214, 48771, 23471, 30163, 31763, 38013, 57001, 11770, 18263, 36366,
 138   20742, 45086, 56969, 53231, 37856, 55814, 38057, 15692, 46761, 8713,
 139   6102, 20083, 8269, 11839, 11571, 50963, 15649, 11698, 40675, 2308
 140 };
 141
 142 static const LITTLENUM_TYPE plus_10[] = {
 143   63839, 36576, 45712, 44516, 37803, 29482, 4966, 30556, 37961, 23310,
 144   27070, 44972, 29507, 48257, 45209, 7494, 17831, 38728, 41577, 29443,
 145   36016, 7955, 35339, 35479, 36011, 14553, 49618, 5588, 25396, 28
 146 };
 147
 148 static const LITTLENUM_TYPE minus_11[] = {
 149   16663, 56882, 61983, 7804, 36555, 32060, 34502, 1000, 14356, 21681,
 150   6605, 34767, 51411, 59048, 53614, 39850, 30079, 6496, 6846, 26841,
 151   40778, 19578, 59899, 44085, 54016, 24259, 11232, 21229, 21313, 81
 152 };
 153
 154 static const LITTLENUM_TYPE plus_11[] = {
 155   92, 9054, 62707, 17993, 7821, 56838, 13992, 21321, 29637, 48426,
 156   42982, 38668, 49574, 28820, 18200, 18927, 53979, 16219, 37484, 2516,
 157   44642, 14665, 11587, 41926, 13556, 23956, 54320, 6661, 55766, 805
 158 };
 159
 160 static const LITTLENUM_TYPE minus_12[] = {
 161   33202, 45969, 58804, 56734, 16482, 26007, 44984, 49334, 31007, 32944,
 162   44517, 63329, 47131, 15291, 59465, 2264, 23218, 11829, 59771, 38798,
 163   31051, 28748, 23129, 40541, 41562, 35108, 50620, 59014, 51817, 6613
 164 };
 165
 166 static const LITTLENUM_TYPE plus_12[] = {
 167   10098, 37922, 58070, 7432, 10470, 63465, 23718, 62190, 47420, 7009,
 168   38443, 4587, 45596, 38472, 52129, 52779, 29012, 13559, 48688, 31678,
 169   41753, 58662, 10668, 36067, 29906, 56906, 21461, 46556, 59571, 9
 170 };
 171
 172 static const LITTLENUM_TYPE minus_13[] = {
 173   45309, 27592, 37144, 34637, 34328, 41671, 34620, 24135, 53401, 22112,
 174   21576, 45147, 39310, 44051, 48572, 3676, 46544, 59768, 33350, 2323,
 175   49524, 61568, 3903, 36487, 36356, 30903, 14975, 9035, 29715, 667
 176 };
 177
 178 static const LITTLENUM_TYPE plus_13[] = {
 179   18788, 16960, 6318, 45685, 55400, 46230, 35794, 25588, 7253, 55541,
 180   49716, 59760, 63592, 8191, 63765, 58530, 44667, 13294, 10001, 55586,
 181   47887, 18738, 9509, 40896, 42506, 52580, 4171, 325, 12329, 98
 182 };
 183
 184 /* Shut up complaints about differing pointer types.  They only differ
 185    in the const attribute, but there isn't any easy way to do this
 186    */
 187 #define X (LITTLENUM_TYPE *)
 188
 189 const FLONUM_TYPE flonum_negative_powers_of_ten[] = {
 190   {X zero, X zero, X zero, 0, '+'},
 191   {X minus_1, X minus_1 + 19, X minus_1 + 19, -20, '+'},
 192   {X minus_2, X minus_2 + 19, X minus_2 + 19, -20, '+'},
 193   {X minus_3, X minus_3 + 19, X minus_3 + 19, -20, '+'},
 194   {X minus_4, X minus_4 + 18, X minus_4 + 18, -20, '+'},
 195   {X minus_5, X minus_5 + 16, X minus_5 + 16, -20, '+'},
 196   {X minus_6, X minus_6 + 13, X minus_6 + 13, -20, '+'},
 197   {X minus_7, X minus_7 + 6, X minus_7 + 6, -20, '+'},
 198   {X minus_8, X minus_8 + 13, X minus_8 + 13, -40, '+'},
 199   {X minus_9, X minus_9 + 26, X minus_9 + 26, -80, '+'},
 200   {X minus_10, X minus_10 + 29, X minus_10 + 29, -136, '+'},
 201   {X minus_11, X minus_11 + 29, X minus_11 + 29, -242, '+'},
 202   {X minus_12, X minus_12 + 29, X minus_12 + 29, -455, '+'},
 203   {X minus_13, X minus_13 + 29, X minus_13 + 29, -880, '+'},
 204 };
 205
 206 const FLONUM_TYPE flonum_positive_powers_of_ten[] = {
 207   {X zero, X zero, X zero, 0, '+'},
 208   {X plus_1, X plus_1 + 0, X plus_1 + 0, 0, '+'},
 209   {X plus_2, X plus_2 + 0, X plus_2 + 0, 0, '+'},
 210   {X plus_3, X plus_3 + 0, X plus_3 + 0, 0, '+'},
 211   {X plus_4, X plus_4 + 1, X plus_4 + 1, 0, '+'},
 212   {X plus_5, X plus_5 + 2, X plus_5 + 2, 1, '+'},
 213   {X plus_6, X plus_6 + 4, X plus_6 + 4, 2, '+'},
 214   {X plus_7, X plus_7 + 9, X plus_7 + 9, 4, '+'},
 215   {X plus_8, X plus_8 + 18, X plus_8 + 18, 8, '+'},
 216   {X plus_9, X plus_9 + 29, X plus_9 + 29, 24, '+'},
 217   {X plus_10, X plus_10 + 29, X plus_10 + 29, 77, '+'},
 218   {X plus_11, X plus_11 + 29, X plus_11 + 29, 183, '+'},
 219   {X plus_12, X plus_12 + 29, X plus_12 + 29, 396, '+'},
 220   {X plus_13, X plus_13 + 29, X plus_13 + 29, 821, '+'},
 221 };
 222
 223 #ifdef VMS
 224 void
 225 dummy1 ()
 226 {
 227 }
 228 #endif