comparison gcc/gencfn-macros.c @ 16:04ced10e8804

gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents
children 84e7813d76e9
comparison
equal deleted inserted replaced
15:561a7518be6b 16:04ced10e8804
1 /* Generate macros based on the combined_fn enum.
2 Copyright (C) 2015-2017 Free Software Foundation, Inc.
3
4 This file is part of GCC.
5
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
9 version.
10
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
19
20 /* Automatically generate code fragments related to combined_fn.
21
22 The program looks for math built-in functions that have float, double
23 and long double variants, such as {sqrtf, sqrt, sqrtl}, and that may
24 or may not have an associated internal function as well. It also looks
25 for integer built-in functions that have int, long, long long and
26 intmax_t variants, such as {clz, clzl, clzll, clzimax}, and that
27 again may or may not have an associated internal function as well.
28
29 When run with -c, the generator prints a list of macros such as:
30
31 CASE_CFN_SQRT
32
33 for each group of functions described above, with 'case CFN_*'
34 statements for each built-in and internal function in the group.
35 For example, there are both built-in and internal implementations
36 of SQRT, so "CASE_CFN_SQRT:" is equivalent to:
37
38 case CFN_BUILT_IN_SQRTF:
39 case CFN_BUILT_IN_SQRT:
40 case CFN_BUILT_IN_SQRTL:
41 case CFN_SQRT:
42
43 The macros for groups with no internal function drop the last line.
44
45 When run with -o, the generator prints a similar list of
46 define_operator_list directives, for use by match.pd. Each operator
47 list starts with the built-in functions, in order of ascending type width.
48 This is followed by an entry for the internal function, or "null" if there
49 is no internal function for the group. For example:
50
51 (define_operator_list SQRT
52 BUILT_IN_SQRTF
53 BUILT_IN_SQRT
54 BUILT_IN_SQRTL
55 IFN_SQRT)
56
57 and:
58
59 (define_operator_list CABS
60 BUILT_IN_CABSF
61 BUILT_IN_CABS
62 BUILT_IN_CABSL
63 null) */
64
65 #include "bconfig.h"
66 #include "system.h"
67 #include "coretypes.h"
68 #include "hash-table.h"
69 #include "hash-set.h"
70 #include "errors.h"
71
72 typedef hash_set <nofree_string_hash> string_set;
73
74 /* Add all names in null-terminated list NAMES to SET. */
75
76 static void
77 add_to_set (string_set *set, const char *const *names)
78 {
79 for (unsigned int i = 0; names[i]; ++i)
80 set->add (names[i]);
81 }
82
83 /* Return true if *BUILTINS contains BUILT_IN_<NAME><SUFFIX> for all
84 suffixes in null-terminated list SUFFIXES. */
85
86 static bool
87 is_group (string_set *builtins, const char *name, const char *const *suffixes)
88 {
89 for (unsigned int i = 0; suffixes[i]; ++i)
90 if (!builtins->contains (ACONCAT (("BUILT_IN_", name, suffixes[i], NULL))))
91 return false;
92 return true;
93 }
94
95 /* Print a macro for all combined functions related to NAME, with the
96 null-terminated list of suffixes in SUFFIXES. INTERNAL_P says whether
97 CFN_<NAME> also exists. */
98
99 static void
100 print_case_cfn (const char *name, bool internal_p,
101 const char *const *suffixes)
102 {
103 printf ("#define CASE_CFN_%s", name);
104 if (internal_p)
105 printf (" \\\n case CFN_%s", name);
106 for (unsigned int i = 0; suffixes[i]; ++i)
107 printf ("%s \\\n case CFN_BUILT_IN_%s%s",
108 internal_p || i > 0 ? ":" : "", name, suffixes[i]);
109 printf ("\n");
110 }
111
112 /* Print an operator list for all combined functions related to NAME,
113 with the null-terminated list of suffixes in SUFFIXES. INTERNAL_P
114 says whether CFN_<NAME> also exists. */
115
116 static void
117 print_define_operator_list (const char *name, bool internal_p,
118 const char *const *suffixes)
119 {
120 printf ("(define_operator_list %s\n", name);
121 for (unsigned int i = 0; suffixes[i]; ++i)
122 printf (" BUILT_IN_%s%s\n", name, suffixes[i]);
123 if (internal_p)
124 printf (" IFN_%s)\n", name);
125 else
126 printf (" null)\n");
127 }
128
129 const char *const builtin_names[] = {
130 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
131 #ENUM,
132 #include "builtins.def"
133 NULL
134 };
135
136 const char *const internal_fn_flt_names[] = {
137 #define DEF_INTERNAL_FLT_FN(NAME, FLAGS, OPTAB, TYPE) \
138 #NAME,
139 #include "internal-fn.def"
140 NULL
141 };
142
143 const char *const internal_fn_int_names[] = {
144 #define DEF_INTERNAL_INT_FN(NAME, FLAGS, OPTAB, TYPE) \
145 #NAME,
146 #include "internal-fn.def"
147 NULL
148 };
149
150 static const char *const flt_suffixes[] = { "F", "", "L", NULL };
151 static const char *const int_suffixes[] = { "", "L", "LL", "IMAX", NULL };
152
153 static const char *const *const suffix_lists[] = {
154 flt_suffixes,
155 int_suffixes,
156 NULL
157 };
158
159 int
160 main (int argc, char **argv)
161 {
162 /* Check arguments. */
163 progname = argv[0];
164 if (argc != 2
165 || argv[1][0] != '-'
166 || !strchr ("co", argv[1][1])
167 || argv[1][2])
168 fatal ("usage: %s [-c|-o] > file", progname);
169 int type = argv[1][1];
170
171 /* Collect the set of built-in and internal functions. */
172 string_set builtins;
173 string_set internal_fns;
174 add_to_set (&builtins, builtin_names);
175 add_to_set (&internal_fns, internal_fn_flt_names);
176 add_to_set (&internal_fns, internal_fn_int_names);
177
178 /* Check the functions. */
179 for (unsigned int i = 0; internal_fn_flt_names[i]; ++i)
180 {
181 const char *name = internal_fn_flt_names[i];
182 if (!is_group (&builtins, name, flt_suffixes))
183 error ("DEF_INTERNAL_FLT_FN (%s) has no associated built-in"
184 " functions", name);
185 }
186 for (unsigned int i = 0; internal_fn_int_names[i]; ++i)
187 {
188 const char *name = internal_fn_int_names[i];
189 if (!is_group (&builtins, name, int_suffixes))
190 error ("DEF_INTERNAL_INT_FN (%s) has no associated built-in"
191 " functions", name);
192 }
193
194 /* Go through the built-in functions in declaration order, outputting
195 definitions as appropriate. */
196 for (unsigned int i = 0; builtin_names[i]; ++i)
197 {
198 const char *name = builtin_names[i];
199 if (strncmp (name, "BUILT_IN_", 9) == 0)
200 {
201 const char *root = name + 9;
202 for (unsigned int j = 0; suffix_lists[j]; ++j)
203 if (is_group (&builtins, root, suffix_lists[j]))
204 {
205 bool internal_p = internal_fns.contains (root);
206 if (type == 'c')
207 print_case_cfn (root, internal_p, suffix_lists[j]);
208 else
209 print_define_operator_list (root, internal_p,
210 suffix_lists[j]);
211 }
212 }
213 }
214
215 if (fflush (stdout) || fclose (stdout) || have_error)
216 return FATAL_EXIT_CODE;
217 return SUCCESS_EXIT_CODE;
218 }