1/* Generate macros based on the combined_fn enum.
2 Copyright (C) 2015-2017 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 3, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14for more details.
15
16You should have received a copy of the GNU General Public License
17along 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
72typedef hash_set <nofree_string_hash> string_set;
73
74/* Add all names in null-terminated list NAMES to SET. */
75
76static void
77add_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
86static bool
87is_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
99static void
100print_case_cfn (const char *name, bool internal_p,
101 const char *const *suffixes, bool floatn_p)
102{
103 const char *floatn = (floatn_p) ? "_FN" : "";
104 printf ("#define CASE_CFN_%s%s", name, floatn);
105 if (internal_p)
106 printf (" \\\n case CFN_%s%s", name, floatn);
107 for (unsigned int i = 0; suffixes[i]; ++i)
108 printf ("%s \\\n case CFN_BUILT_IN_%s%s",
109 internal_p || i > 0 ? ":" : "", name, suffixes[i]);
110 printf ("\n");
111}
112
113/* Print an operator list for all combined functions related to NAME,
114 with the null-terminated list of suffixes in SUFFIXES. INTERNAL_P
115 says whether CFN_<NAME> also exists. */
116
117static void
118print_define_operator_list (const char *name, bool internal_p,
119 const char *const *suffixes, bool floatn_p)
120{
121 const char *floatn = (floatn_p) ? "_FN" : "";
122 printf ("(define_operator_list %s%s\n", name, floatn);
123 for (unsigned int i = 0; suffixes[i]; ++i)
124 printf (" BUILT_IN_%s%s\n", name, suffixes[i]);
125 if (internal_p)
126 printf (" IFN_%s)\n", name);
127 else
128 printf (" null)\n");
129}
130
131const char *const builtin_names[] = {
132#define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
133 #ENUM,
134#include "builtins.def"
135 NULL
136};
137
138const char *const internal_fn_flt_names[] = {
139#define DEF_INTERNAL_FLT_FN(NAME, FLAGS, OPTAB, TYPE) \
140 #NAME,
141#include "internal-fn.def"
142 NULL
143};
144
145const char *const internal_fn_int_names[] = {
146#define DEF_INTERNAL_INT_FN(NAME, FLAGS, OPTAB, TYPE) \
147 #NAME,
148#include "internal-fn.def"
149 NULL
150};
151
152static const char *const flt_suffixes[] = { "F", "", "L", NULL };
153static const char *const fltfn_suffixes[] = { "F16", "F32", "F64", "F128",
154 "F32X", "F64X", "F128X", NULL };
155static const char *const int_suffixes[] = { "", "L", "LL", "IMAX", NULL };
156
157static const char *const *const suffix_lists[] = {
158 flt_suffixes,
159 int_suffixes,
160 NULL
161};
162
163int
164main (int argc, char **argv)
165{
166 /* Check arguments. */
167 progname = argv[0];
168 if (argc != 2
169 || argv[1][0] != '-'
170 || !strchr ("co", argv[1][1])
171 || argv[1][2])
172 fatal ("usage: %s [-c|-o] > file", progname);
173 int type = argv[1][1];
174
175 /* Collect the set of built-in and internal functions. */
176 string_set builtins;
177 string_set internal_fns;
178 add_to_set (&builtins, builtin_names);
179 add_to_set (&internal_fns, internal_fn_flt_names);
180 add_to_set (&internal_fns, internal_fn_int_names);
181
182 /* Check the functions. */
183 for (unsigned int i = 0; internal_fn_flt_names[i]; ++i)
184 {
185 const char *name = internal_fn_flt_names[i];
186 if (!is_group (&builtins, name, flt_suffixes))
187 error ("DEF_INTERNAL_FLT_FN (%s) has no associated built-in"
188 " functions", name);
189 }
190 for (unsigned int i = 0; internal_fn_int_names[i]; ++i)
191 {
192 const char *name = internal_fn_int_names[i];
193 if (!is_group (&builtins, name, int_suffixes))
194 error ("DEF_INTERNAL_INT_FN (%s) has no associated built-in"
195 " functions", name);
196 }
197
198 /* Go through the built-in functions in declaration order, outputting
199 definitions as appropriate. */
200 for (unsigned int i = 0; builtin_names[i]; ++i)
201 {
202 const char *name = builtin_names[i];
203 if (strncmp (name, "BUILT_IN_", 9) == 0)
204 {
205 const char *root = name + 9;
206 for (unsigned int j = 0; suffix_lists[j]; ++j)
207 {
208 const char *const *const suffix = suffix_lists[j];
209
210 if (is_group (&builtins, root, suffix))
211 {
212 bool internal_p = internal_fns.contains (root);
213
214 if (type == 'c')
215 print_case_cfn (root, internal_p, suffix, false);
216 else
217 print_define_operator_list (root, internal_p,
218 suffix, false);
219
220 /* Support the _Float<N> and _Float<N>X math functions if
221 they exist. We put these out as a separate CFN macro,
222 so code can add support or not as needed. */
223 if (suffix == flt_suffixes
224 && is_group (&builtins, root, fltfn_suffixes))
225 {
226 if (type == 'c')
227 print_case_cfn (root, false, fltfn_suffixes, true);
228 else
229 print_define_operator_list (root, false, fltfn_suffixes,
230 true);
231 }
232 }
233 }
234 }
235 }
236
237 if (fflush (stdout) || fclose (stdout) || have_error)
238 return FATAL_EXIT_CODE;
239 return SUCCESS_EXIT_CODE;
240}
241