gas/flonum-const.c

   1 /* flonum_const.c - Useful Flonum constants
   2    Copyright (C) 1987, 1990, 1991, 1992 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 2, 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
  18    the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #include "flonum.h"
  21 /* JF:  I added the last entry to this table, and I'm not
  22    sure if its right or not.  Could go either way.  I wish
  23    I really understood this stuff. */
  24
  25
  26 const int table_size_of_flonum_powers_of_ten = 11;
  27
  28 static const LITTLENUM_TYPE zero[] = {     1 };
  29
  30 /***********************************************************************\
  31  *                                                                      *
  32  *      Warning: the low order bits may be WRONG here.                  *
  33  *      I took this from a suspect bc(1) script.                        *
  34  *      "minus_X"[] is supposed to be 10^(2^-X) expressed in base 2^16. *
  35  *      The radix point is just AFTER the highest element of the []     *
  36  *                                                                      *
  37  *      Because bc rounds DOWN for printing (I think), the lowest       *
  38  *      significance littlenums should probably have 1 added to them.   *
  39  *                                                                      *
  40  \***********************************************************************/
  41
  42 /* JF:  If this equals 6553/(2^16)+39321/(2^32)+...  it approaches .1 */
  43 static const LITTLENUM_TYPE minus_1 [] = {
  44         39321, 39321, 39321, 39321, 39321, 39321, 39321, 39321, 39321, 39321,
  45         39321, 39321, 39321, 39321, 39321, 39321, 39321, 39321, 39321,  6553 };
  46 static const LITTLENUM_TYPE plus_1 [] = {    10                             };
  47
  48 /* JF:  If this equals 655/(2^16) + 23592/(2^32) + ... it approaches .01 */
  49 static const LITTLENUM_TYPE minus_2 [] = {
  50         10485, 36700, 62914, 23592, 49807, 10485, 36700, 62914, 23592, 49807,
  51         10485, 36700, 62914, 23592, 49807, 10485, 36700, 62914, 23592,   655 };
  52 static const LITTLENUM_TYPE plus_2 [] = {   100                             };
  53
  54 /* This approaches .0001 */
  55 static const LITTLENUM_TYPE minus_3 [] = {
  56         52533, 20027, 37329, 65116, 64067, 60397, 14784, 18979, 33659, 19503,
  57         2726,  9542,   629,  2202, 40475, 10590,  4299, 47815, 36280,     6 };
  58 static const LITTLENUM_TYPE plus_3 [] = { 10000                             };
  59
  60 /* JF: this approaches 1e-8 */
  61 static const LITTLENUM_TYPE minus_4 [] = {
  62         22516, 49501, 54293, 19424, 60699,  6716, 24348, 22618, 23904, 21327,
  63         3919, 44703, 19149, 28803, 48959,  6259, 50273, 62237,    42        };
  64 /* This equals 1525 * 2^16 + 57600 */
  65 static const LITTLENUM_TYPE plus_4 [] = { 57600,  1525                      };
  66
  67 /* This approaches 1e-16 */
  68 static const LITTLENUM_TYPE minus_5 [] = {
  69         22199, 45957, 17005, 26266, 10526, 16260, 55017, 35680, 40443, 19789,
  70         17356, 30195, 55905, 28426, 63010, 44197,  1844                      };
  71 static const LITTLENUM_TYPE plus_5 [] = { 28609, 34546,    35               };
  72
  73 static const LITTLENUM_TYPE minus_6 [] = {
  74         30926, 26518, 13110, 43018, 54982, 48258, 24658, 15209, 63366, 11929,
  75         20069, 43857, 60487,    51                                           };
  76 static const LITTLENUM_TYPE plus_6 [] = { 61313, 34220, 16731, 11629,  1262 };
  77
  78 static const LITTLENUM_TYPE minus_7 [] = {
  79         29819, 14733, 21490, 40602, 31315, 65186,  2695                      };
  80 static const LITTLENUM_TYPE plus_7 [] = {
  81         7937, 49002, 60772, 28216, 38893, 55975, 63988, 59711, 20227,    24 };
  82
  83 static const LITTLENUM_TYPE minus_8 [] = {
  84         45849, 19069, 18068, 36324, 37948, 48745, 10873, 64360, 15961, 20566,
  85         24178, 15922, 59427,   110                                           };
  86 static const LITTLENUM_TYPE plus_8 [] = {
  87         15873, 11925, 39177,   991, 14589, 19735, 25347, 65086, 53853,  938,
  88         37209, 47086, 33626, 23253, 32586, 42547,  9731, 59679,  590         };
  89
  90 static const LITTLENUM_TYPE minus_9 [] = {
  91         63601, 55221, 43562, 33661, 29067, 28203, 65417, 64352, 22462, 41110,
  92         12570, 28635, 23199, 50572, 28471, 27074, 46375, 64028, 13106, 63700,
  93         32698, 17493, 32420, 34382, 22750, 20681, 12300                      };
  94 static const LITTLENUM_TYPE plus_9 [] = {
  95         63564, 61556, 29377, 54467, 18621, 28141, 36415, 61241, 47119, 30026,
  96         19740, 46002, 13541, 61413, 30480, 38664, 32205, 50593, 51112, 48904,
  97         48263, 43814,   286, 30826, 52813, 62575, 61390, 24540, 21495,     5 };
  98
  99 static const LITTLENUM_TYPE minus_10 [] = {
 100         50313, 34681,  1464, 25889, 19575, 41125, 17635,  4598, 49708, 13427,
 101         17287, 56115, 53783, 38255, 32415, 17778, 31596,  7557, 20951, 18477,
 102         40353,  1178, 44405, 11837, 11571, 50963, 15649, 11698, 40675,  2308,  };
 103 static const LITTLENUM_TYPE plus_10[] = {
 104         18520, 53764, 54535, 61910, 61962, 59843, 46270, 58053, 12473, 63785,
 105         2449, 43230, 50044, 47595, 10403, 35766, 32607,  1124, 24966, 35044,
 106         25524, 23631, 18826, 14518, 58448, 14562, 49618,  5588, 25396,    28 };
 107
 108 static const LITTLENUM_TYPE minus_11 [] = {
 109         6223, 59909, 62437, 59960, 14652, 45336, 48800,  7647, 51962, 37982,
 110         60436, 58176, 26767,  8440,  9831, 48556, 20994, 14148,  6757, 17221,
 111         60624, 46129, 53210, 44085, 54016, 24259, 11232, 21229, 21313,    81,  };
 112 static const LITTLENUM_TYPE plus_11 [] = {
 113         36159,  2055, 33615, 61362, 23581, 62454,  9748, 15275, 39284, 58636,
 114         16269, 42793, 47240, 45774, 50861, 48400,  9413, 40281,  4030,  9572,
 115         7984, 33038, 59522, 19450, 40593, 24486, 54320,  6661, 55766,   805,  };
 116
 117 /* Shut up complaints about differing pointer types.  They only differ
 118    in the const attribute, but there isn't any easy way to do this
 119    */
 120 #define X (LITTLENUM_TYPE *)
 121
 122 const FLONUM_TYPE flonum_negative_powers_of_ten [] = {
 123         {X zero,        X zero,         X zero,           0, '+'},
 124         {X minus_1,     X minus_1 +19,  X minus_1  + 19, -20, '+'},
 125         {X minus_2,     X minus_2 +19,  X minus_2  + 19, -20, '+'},
 126         {X minus_3,     X minus_3 +19,  X minus_3  + 19, -20, '+'},
 127         {X minus_4,     X minus_4 +18,  X minus_4  + 18, -20, '+'},
 128         {X minus_5,     X minus_5 +16,  X minus_5  + 16, -20, '+'},
 129         {X minus_6,     X minus_6 +13,  X minus_6  + 13, -20, '+'},
 130         {X minus_7,     X minus_7 + 6,  X minus_7  +  6, -20, '+'},
 131         {X minus_8,     X minus_8 +13,  X minus_8  + 13, -40, '+'},
 132         {X minus_9,     X minus_9 +26,  X minus_9  + 26, -80, '+'},
 133         {X minus_10,    X minus_10+29,  X minus_10 + 29,-136, '+'},
 134         {X minus_11,    X minus_11+29,  X minus_11 + 29,-242, '+'},
 135 };
 136
 137 const FLONUM_TYPE flonum_positive_powers_of_ten [] = {
 138         {X zero,        X zero,         X zero,           0, '+'},
 139         {X plus_1,      X plus_1  +  0, X plus_1  +  0,   0, '+'},
 140         {X plus_2,      X plus_2  +  0, X plus_2  +  0,   0, '+'},
 141         {X plus_3,      X plus_3  +  0, X plus_3  +  0,   0, '+'},
 142         {X plus_4,      X plus_4  +  1, X plus_4  +  1,   0, '+'},
 143         {X plus_5,      X plus_5  +  2, X plus_5  +  2,   1, '+'},
 144         {X plus_6,      X plus_6  +  4, X plus_6  +  4,   2, '+'},
 145         {X plus_7,      X plus_7  +  9, X plus_7  +  9,   4, '+'},
 146         {X plus_8,      X plus_8  + 18, X plus_8  + 18,   8, '+'},
 147         {X plus_9,      X plus_9  + 29, X plus_9  + 29,  24, '+'},
 148         {X plus_10,     X plus_10 + 29, X plus_10 + 29,  77, '+'},
 149         {X plus_11,     X plus_11 + 29, X plus_11 + 29, 183, '+'},
 150 };
 151
 152 #ifdef VMS
 153 dummy1()
 154 {
 155 }
 156 #endif
 157 /* end of flonum_const.c */