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