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af92131a JM |
1 | /* Generate table of tests in tst-strtod-round.c from |
2 | tst-strtod-round-data. | |
3 | Copyright (C) 2012 Free Software Foundation, Inc. | |
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 | |
21 | #include <stdbool.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <mpfr.h> | |
25 | ||
26 | /* Work around incorrect ternary value from mpfr_strtofr | |
27 | <https://sympa.inria.fr/sympa/arc/mpfr/2012-08/msg00005.html>. */ | |
28 | #define WORKAROUND | |
29 | ||
30 | static int | |
31 | string_to_fp (mpfr_t f, const char *s, mpfr_rnd_t rnd) | |
32 | { | |
33 | #ifdef WORKAROUND | |
34 | mpfr_t f2; | |
35 | mpfr_init2 (f2, 100000); | |
36 | int r0 = mpfr_strtofr (f2, s, NULL, 0, rnd); | |
37 | int r = mpfr_set (f, f2, rnd); | |
38 | mpfr_subnormalize (f, r, rnd); | |
39 | mpfr_clear (f2); | |
40 | return r0 | r; | |
41 | #else | |
42 | int r = mpfr_strtofr (f, s, NULL, 0, rnd); | |
43 | mpfr_subnormalize (f, r, rnd); | |
44 | return r; | |
45 | #endif | |
46 | } | |
47 | ||
48 | static void | |
49 | print_fp (mpfr_t f, const char *suffix, const char *suffix2) | |
50 | { | |
51 | if (mpfr_inf_p (f)) | |
52 | mpfr_printf ("\t%sINFINITY%s", mpfr_signbit (f) ? "-" : "", suffix2); | |
53 | else | |
54 | mpfr_printf ("\t%Ra%s%s", f, suffix, suffix2); | |
55 | } | |
56 | ||
57 | static void | |
58 | round_str (const char *s, const char *suffix, | |
59 | int prec, int emin, int emax, bool need_exact) | |
60 | { | |
61 | mpfr_t f; | |
62 | mpfr_set_default_prec (prec); | |
63 | mpfr_set_emin (emin); | |
64 | mpfr_set_emax (emax); | |
65 | mpfr_init (f); | |
66 | int r = string_to_fp (f, s, MPFR_RNDD); | |
67 | if (need_exact) | |
68 | mpfr_printf ("\t%s,\n", r ? "false" : "true"); | |
69 | print_fp (f, suffix, ",\n"); | |
70 | string_to_fp (f, s, MPFR_RNDN); | |
71 | print_fp (f, suffix, ",\n"); | |
72 | string_to_fp (f, s, MPFR_RNDZ); | |
73 | print_fp (f, suffix, ",\n"); | |
74 | string_to_fp (f, s, MPFR_RNDU); | |
75 | print_fp (f, suffix, ""); | |
76 | mpfr_clear (f); | |
77 | } | |
78 | ||
79 | static void | |
80 | round_for_all (const char *s) | |
81 | { | |
82 | static const struct fmt { | |
83 | const char *suffix; | |
84 | int prec; | |
85 | int emin; | |
86 | int emax; | |
87 | bool need_exact; | |
e1343020 | 88 | } formats[7] = { |
af92131a JM |
89 | { "f", 24, -148, 128, false }, |
90 | { "", 53, -1073, 1024, false }, | |
91 | { "L", 53, -1073, 1024, false }, | |
e1343020 | 92 | /* This is the Intel extended float format. */ |
af92131a | 93 | { "L", 64, -16444, 16384, false }, |
e1343020 AS |
94 | /* This is the Motorola extended float format. */ |
95 | { "L", 64, -16445, 16384, false }, | |
af92131a JM |
96 | { "L", 106, -1073, 1024, true }, |
97 | { "L", 113, -16493, 16384, false }, | |
98 | }; | |
99 | mpfr_printf (" TEST (\""); | |
100 | const char *p; | |
101 | for (p = s; *p; p++) | |
102 | { | |
103 | putchar (*p); | |
104 | if ((p - s) % 60 == 59 && p[1]) | |
105 | mpfr_printf ("\"\n\t\""); | |
106 | } | |
107 | mpfr_printf ("\",\n"); | |
108 | int i; | |
e1343020 | 109 | for (i = 0; i < 7; i++) |
af92131a JM |
110 | { |
111 | round_str (s, formats[i].suffix, formats[i].prec, | |
112 | formats[i].emin, formats[i].emax, formats[i].need_exact); | |
e1343020 | 113 | if (i < 6) |
af92131a JM |
114 | mpfr_printf (",\n"); |
115 | } | |
116 | mpfr_printf ("),\n"); | |
117 | } | |
118 | ||
119 | int | |
120 | main (void) | |
121 | { | |
122 | char *p = NULL; | |
123 | size_t len; | |
124 | ssize_t nbytes; | |
125 | while ((nbytes = getline (&p, &len, stdin)) != -1) | |
126 | { | |
127 | if (p[nbytes - 1] == '\n') | |
128 | p[nbytes - 1] = 0; | |
129 | round_for_all (p); | |
130 | free (p); | |
131 | p = NULL; | |
132 | } | |
133 | return 0; | |
134 | } |