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1 | /* Generate table of tests in tst-strtod-round.c from |
2 | tst-strtod-round-data. | |
f7a9f785 | 3 | Copyright (C) 2012-2016 Free Software Foundation, Inc. |
af92131a JM |
4 | This file is part of the GNU C Library. |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library 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 GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
17 | License along with the GNU C Library; if not, see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #define _GNU_SOURCE | |
ed8c2ecd | 21 | #include <assert.h> |
af92131a JM |
22 | #include <stdbool.h> |
23 | #include <stdio.h> | |
24 | #include <stdlib.h> | |
25 | #include <mpfr.h> | |
26 | ||
27 | /* Work around incorrect ternary value from mpfr_strtofr | |
28 | <https://sympa.inria.fr/sympa/arc/mpfr/2012-08/msg00005.html>. */ | |
29 | #define WORKAROUND | |
30 | ||
31 | static int | |
32 | string_to_fp (mpfr_t f, const char *s, mpfr_rnd_t rnd) | |
33 | { | |
34 | #ifdef WORKAROUND | |
35 | mpfr_t f2; | |
36 | mpfr_init2 (f2, 100000); | |
37 | int r0 = mpfr_strtofr (f2, s, NULL, 0, rnd); | |
38 | int r = mpfr_set (f, f2, rnd); | |
39 | mpfr_subnormalize (f, r, rnd); | |
40 | mpfr_clear (f2); | |
41 | return r0 | r; | |
42 | #else | |
43 | int r = mpfr_strtofr (f, s, NULL, 0, rnd); | |
44 | mpfr_subnormalize (f, r, rnd); | |
45 | return r; | |
46 | #endif | |
47 | } | |
48 | ||
49 | static void | |
50 | print_fp (mpfr_t f, const char *suffix, const char *suffix2) | |
51 | { | |
52 | if (mpfr_inf_p (f)) | |
53 | mpfr_printf ("\t%sINFINITY%s", mpfr_signbit (f) ? "-" : "", suffix2); | |
54 | else | |
55 | mpfr_printf ("\t%Ra%s%s", f, suffix, suffix2); | |
56 | } | |
57 | ||
58 | static void | |
59 | round_str (const char *s, const char *suffix, | |
1f24b9ad | 60 | int prec, int emin, int emax, bool ibm_ld) |
af92131a JM |
61 | { |
62 | mpfr_t f; | |
63 | mpfr_set_default_prec (prec); | |
64 | mpfr_set_emin (emin); | |
65 | mpfr_set_emax (emax); | |
66 | mpfr_init (f); | |
67 | int r = string_to_fp (f, s, MPFR_RNDD); | |
1f24b9ad | 68 | if (ibm_ld) |
ed8c2ecd JM |
69 | { |
70 | assert (prec == 106 && emin == -1073 && emax == 1024); | |
71 | /* The maximum value in IBM long double has discontiguous | |
72 | mantissa bits. */ | |
73 | mpfr_t max_value; | |
74 | mpfr_init2 (max_value, 107); | |
75 | mpfr_set_str (max_value, "0x1.fffffffffffff7ffffffffffffcp+1023", 0, | |
76 | MPFR_RNDN); | |
77 | if (mpfr_cmpabs (f, max_value) > 0) | |
78 | r = 1; | |
ed8c2ecd JM |
79 | mpfr_clear (max_value); |
80 | } | |
1f24b9ad | 81 | mpfr_printf ("\t%s,\n", r ? "false" : "true"); |
af92131a JM |
82 | print_fp (f, suffix, ",\n"); |
83 | string_to_fp (f, s, MPFR_RNDN); | |
84 | print_fp (f, suffix, ",\n"); | |
85 | string_to_fp (f, s, MPFR_RNDZ); | |
86 | print_fp (f, suffix, ",\n"); | |
87 | string_to_fp (f, s, MPFR_RNDU); | |
88 | print_fp (f, suffix, ""); | |
89 | mpfr_clear (f); | |
90 | } | |
91 | ||
92 | static void | |
93 | round_for_all (const char *s) | |
94 | { | |
95 | static const struct fmt { | |
96 | const char *suffix; | |
97 | int prec; | |
98 | int emin; | |
99 | int emax; | |
1f24b9ad | 100 | bool ibm_ld; |
e1343020 | 101 | } formats[7] = { |
af92131a JM |
102 | { "f", 24, -148, 128, false }, |
103 | { "", 53, -1073, 1024, false }, | |
104 | { "L", 53, -1073, 1024, false }, | |
e1343020 | 105 | /* This is the Intel extended float format. */ |
af92131a | 106 | { "L", 64, -16444, 16384, false }, |
e1343020 AS |
107 | /* This is the Motorola extended float format. */ |
108 | { "L", 64, -16445, 16384, false }, | |
af92131a JM |
109 | { "L", 106, -1073, 1024, true }, |
110 | { "L", 113, -16493, 16384, false }, | |
111 | }; | |
112 | mpfr_printf (" TEST (\""); | |
113 | const char *p; | |
114 | for (p = s; *p; p++) | |
115 | { | |
116 | putchar (*p); | |
117 | if ((p - s) % 60 == 59 && p[1]) | |
118 | mpfr_printf ("\"\n\t\""); | |
119 | } | |
120 | mpfr_printf ("\",\n"); | |
121 | int i; | |
e1343020 | 122 | for (i = 0; i < 7; i++) |
af92131a JM |
123 | { |
124 | round_str (s, formats[i].suffix, formats[i].prec, | |
1f24b9ad | 125 | formats[i].emin, formats[i].emax, formats[i].ibm_ld); |
e1343020 | 126 | if (i < 6) |
af92131a JM |
127 | mpfr_printf (",\n"); |
128 | } | |
129 | mpfr_printf ("),\n"); | |
130 | } | |
131 | ||
132 | int | |
133 | main (void) | |
134 | { | |
135 | char *p = NULL; | |
136 | size_t len; | |
137 | ssize_t nbytes; | |
138 | while ((nbytes = getline (&p, &len, stdin)) != -1) | |
139 | { | |
140 | if (p[nbytes - 1] == '\n') | |
141 | p[nbytes - 1] = 0; | |
142 | round_for_all (p); | |
143 | free (p); | |
144 | p = NULL; | |
145 | } | |
146 | return 0; | |
147 | } |