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1 | /* Generate code to initialize optabs from machine description. | |
2 | Copyright (C) 1993, 94-97, 1998 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GNU CC. | |
5 | ||
6 | GNU CC 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 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU CC 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 GNU CC; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | ||
22 | #include "hconfig.h" | |
23 | #include "system.h" | |
24 | #include "rtl.h" | |
25 | #include "obstack.h" | |
26 | ||
27 | static struct obstack obstack; | |
28 | struct obstack *rtl_obstack = &obstack; | |
29 | ||
30 | #define obstack_chunk_alloc xmalloc | |
31 | #define obstack_chunk_free free | |
32 | ||
33 | static void fatal PVPROTO ((char *, ...)) | |
34 | ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN; | |
35 | void fancy_abort PROTO((void)) ATTRIBUTE_NORETURN; | |
36 | ||
37 | /* Many parts of GCC use arrays that are indexed by machine mode and | |
38 | contain the insn codes for pattern in the MD file that perform a given | |
39 | operation on operands of that mode. | |
40 | ||
41 | These patterns are present in the MD file with names that contain | |
42 | the mode(s) used and the name of the operation. This program | |
43 | writes a function `init_all_optabs' that initializes the optabs with | |
44 | all the insn codes of the relevant patterns present in the MD file. | |
45 | ||
46 | This array contains a list of optabs that need to be initialized. Within | |
47 | each string, the name of the pattern to be matched against is delimited | |
48 | with %( and %). In the string, %a and %b are used to match a short mode | |
49 | name (the part of the mode name not including `mode' and converted to | |
50 | lower-case). When writing out the initializer, the entire string is | |
51 | used. %A and %B are replaced with the full name of the mode; %a and %b | |
52 | are replaced with the short form of the name, as above. | |
53 | ||
54 | If %N is present in the pattern, it means the two modes must be consecutive | |
55 | widths in the same mode class (e.g, QImode and HImode). %I means that | |
56 | only integer modes should be considered for the next mode, and %F means | |
57 | that only float modes should be considered. | |
58 | ||
59 | For some optabs, we store the operation by RTL codes. These are only | |
60 | used for comparisons. In that case, %c and %C are the lower-case and | |
61 | upper-case forms of the comparison, respectively. */ | |
62 | ||
63 | /* The reason we use \% is to avoid sequences of the form %-capletter-% | |
64 | which SCCS treats as magic. This gets warnings which you should ignore. */ | |
65 | ||
66 | char *optabs[] = | |
67 | { "extendtab[(int) %B][(int) %A][0] = CODE_FOR_%(extend%a\%b2%)", | |
68 | "extendtab[(int) %B][(int) %A][1] = CODE_FOR_%(zero_extend%a\%b2%)", | |
69 | "fixtab[(int) %A][(int) %B][0] = CODE_FOR_%(fix%F\%a%I\%b2%)", | |
70 | "fixtab[(int) %A][(int) %B][1] = CODE_FOR_%(fixuns%F\%a%b2%)", | |
71 | "fixtrunctab[(int) %A][(int) %B][0] = CODE_FOR_%(fix_trunc%F\%a%I\%b2%)", | |
72 | "fixtrunctab[(int) %A][(int) %B][1] = CODE_FOR_%(fixuns_trunc%F\%a%I\%b2%)", | |
73 | "floattab[(int) %B][(int) %A][0] = CODE_FOR_%(float%I\%a%F\%b2%)", | |
74 | "floattab[(int) %B][(int) %A][1] = CODE_FOR_%(floatuns%I\%a%F\%b2%)", | |
75 | "add_optab->handlers[(int) %A].insn_code = CODE_FOR_%(add%a3%)", | |
76 | "sub_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sub%a3%)", | |
77 | "smul_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mul%a3%)", | |
78 | "umul_highpart_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umul%a3_highpart%)", | |
79 | "smul_highpart_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smul%a3_highpart%)", | |
80 | "smul_widen_optab->handlers[(int) %B].insn_code = CODE_FOR_%(mul%a%b3%)%N", | |
81 | "umul_widen_optab->handlers[(int) %B].insn_code = CODE_FOR_%(umul%a%b3%)%N", | |
82 | "sdiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(div%I\%a3%)", | |
83 | "udiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(udiv%I\%a3%)", | |
84 | "sdivmod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(divmod%a4%)", | |
85 | "udivmod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(udivmod%a4%)", | |
86 | "smod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mod%a3%)", | |
87 | "umod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umod%a3%)", | |
88 | "flodiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(div%F\%a3%)", | |
89 | "ftrunc_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ftrunc%F\%a2%)", | |
90 | "and_optab->handlers[(int) %A].insn_code = CODE_FOR_%(and%a3%)", | |
91 | "ior_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ior%a3%)", | |
92 | "xor_optab->handlers[(int) %A].insn_code = CODE_FOR_%(xor%a3%)", | |
93 | "ashl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ashl%a3%)", | |
94 | "ashr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ashr%a3%)", | |
95 | "lshr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(lshr%a3%)", | |
96 | "rotl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(rotl%a3%)", | |
97 | "rotr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(rotr%a3%)", | |
98 | "smin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smin%I\%a3%)", | |
99 | "smin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(min%F\%a3%)", | |
100 | "smax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smax%I\%a3%)", | |
101 | "smax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(max%F\%a3%)", | |
102 | "umin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umin%I\%a3%)", | |
103 | "umax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umax%I\%a3%)", | |
104 | "neg_optab->handlers[(int) %A].insn_code = CODE_FOR_%(neg%a2%)", | |
105 | "abs_optab->handlers[(int) %A].insn_code = CODE_FOR_%(abs%a2%)", | |
106 | "sqrt_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sqrt%a2%)", | |
107 | "sin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sin%a2%)", | |
108 | "cos_optab->handlers[(int) %A].insn_code = CODE_FOR_%(cos%a2%)", | |
109 | "strlen_optab->handlers[(int) %A].insn_code = CODE_FOR_%(strlen%a%)", | |
110 | "one_cmpl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(one_cmpl%a2%)", | |
111 | "ffs_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ffs%a2%)", | |
112 | "mov_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mov%a%)", | |
113 | "movstrict_optab->handlers[(int) %A].insn_code = CODE_FOR_%(movstrict%a%)", | |
114 | "cmp_optab->handlers[(int) %A].insn_code = CODE_FOR_%(cmp%a%)", | |
115 | "tst_optab->handlers[(int) %A].insn_code = CODE_FOR_%(tst%a%)", | |
116 | "bcc_gen_fctn[(int) %C] = gen_%(b%c%)", | |
117 | "setcc_gen_code[(int) %C] = CODE_FOR_%(s%c%)", | |
118 | "movcc_gen_code[(int) %A] = CODE_FOR_%(mov%acc%)", | |
119 | "reload_in_optab[(int) %A] = CODE_FOR_%(reload_in%a%)", | |
120 | "reload_out_optab[(int) %A] = CODE_FOR_%(reload_out%a%)", | |
121 | "movstr_optab[(int) %A] = CODE_FOR_%(movstr%a%)", | |
122 | "clrstr_optab[(int) %A] = CODE_FOR_%(clrstr%a%)" }; | |
123 | ||
124 | /* Allow linking with print-rtl.c. */ | |
125 | char **insn_name_ptr; | |
126 | ||
127 | static void gen_insn PROTO((rtx)); | |
128 | ||
129 | static void | |
130 | gen_insn (insn) | |
131 | rtx insn; | |
132 | { | |
133 | char *name = XSTR (insn, 0); | |
134 | int m1, m2, op; | |
135 | size_t pindex; | |
136 | int i; | |
137 | char *np, *pp, *p, *q; | |
138 | ||
139 | /* Don't mention instructions whose names are the null string. | |
140 | They are in the machine description just to be recognized. */ | |
141 | if (*name == 0) | |
142 | return; | |
143 | ||
144 | /* See if NAME matches one of the patterns we have for the optabs we know | |
145 | about. */ | |
146 | ||
147 | for (pindex = 0; pindex < sizeof optabs / sizeof optabs[0]; pindex++) | |
148 | { | |
149 | int force_float = 0, force_int = 0; | |
150 | int force_consec = 0; | |
151 | int matches = 1; | |
152 | ||
153 | for (pp = optabs[pindex]; pp[0] != '%' || pp[1] != '('; pp++) | |
154 | ; | |
155 | ||
156 | for (pp += 2, np = name; matches && ! (pp[0] == '%' && pp[1] == ')'); | |
157 | pp++) | |
158 | { | |
159 | if (*pp != '%') | |
160 | { | |
161 | if (*pp != *np++) | |
162 | break; | |
163 | } | |
164 | else | |
165 | switch (*++pp) | |
166 | { | |
167 | case 'N': | |
168 | force_consec = 1; | |
169 | break; | |
170 | case 'I': | |
171 | force_int = 1; | |
172 | break; | |
173 | case 'F': | |
174 | force_float = 1; | |
175 | break; | |
176 | case 'c': | |
177 | for (op = 0; op < NUM_RTX_CODE; op++) | |
178 | { | |
179 | for (p = rtx_name[op], q = np; *p; p++, q++) | |
180 | if (*p != *q) | |
181 | break; | |
182 | ||
183 | /* We have to be concerned about matching "gt" and | |
184 | missing "gtu", e.g., so verify we have reached the | |
185 | end of thing we are to match. */ | |
186 | if (*p == 0 && *q == 0 && rtx_class[op] == '<') | |
187 | break; | |
188 | } | |
189 | ||
190 | if (op == NUM_RTX_CODE) | |
191 | matches = 0; | |
192 | else | |
193 | np += strlen (rtx_name[op]); | |
194 | break; | |
195 | case 'a': | |
196 | case 'b': | |
197 | /* This loop will stop at the first prefix match, so | |
198 | look through the modes in reverse order, in case | |
199 | EXTRA_CC_MODES was used and CC is a prefix of the | |
200 | CC modes (as it should be). */ | |
201 | for (i = ((int) MAX_MACHINE_MODE) - 1; i >= 0; i--) | |
202 | { | |
203 | for (p = mode_name[i], q = np; *p; p++, q++) | |
204 | if (tolower ((unsigned char)*p) != *q) | |
205 | break; | |
206 | ||
207 | if (*p == 0 | |
208 | && (! force_int || mode_class[i] == MODE_INT) | |
209 | && (! force_float || mode_class[i] == MODE_FLOAT)) | |
210 | break; | |
211 | } | |
212 | ||
213 | if (i < 0) | |
214 | matches = 0; | |
215 | else if (*pp == 'a') | |
216 | m1 = i, np += strlen (mode_name[i]); | |
217 | else | |
218 | m2 = i, np += strlen (mode_name[i]); | |
219 | ||
220 | force_int = force_float = 0; | |
221 | break; | |
222 | ||
223 | default: | |
224 | abort (); | |
225 | } | |
226 | } | |
227 | ||
228 | if (matches && pp[0] == '%' && pp[1] == ')' | |
229 | && *np == 0 | |
230 | && (! force_consec || (int) GET_MODE_WIDER_MODE(m1) == m2)) | |
231 | break; | |
232 | } | |
233 | ||
234 | if (pindex == sizeof optabs / sizeof optabs[0]) | |
235 | return; | |
236 | ||
237 | /* We found a match. If this pattern is only conditionally present, | |
238 | write out the "if" and two extra blanks. */ | |
239 | ||
240 | if (*XSTR (insn, 2) != 0) | |
241 | printf (" if (HAVE_%s)\n ", name); | |
242 | ||
243 | printf (" "); | |
244 | ||
245 | /* Now write out the initialization, making all required substitutions. */ | |
246 | for (pp = optabs[pindex]; *pp; pp++) | |
247 | { | |
248 | if (*pp != '%') | |
249 | printf ("%c", *pp); | |
250 | else | |
251 | switch (*++pp) | |
252 | { | |
253 | case '(': case ')': | |
254 | case 'I': case 'F': case 'N': | |
255 | break; | |
256 | case 'a': | |
257 | for (np = mode_name[m1]; *np; np++) | |
258 | printf ("%c", tolower ((unsigned char)*np)); | |
259 | break; | |
260 | case 'b': | |
261 | for (np = mode_name[m2]; *np; np++) | |
262 | printf ("%c", tolower ((unsigned char)*np)); | |
263 | break; | |
264 | case 'A': | |
265 | printf ("%smode", mode_name[m1]); | |
266 | break; | |
267 | case 'B': | |
268 | printf ("%smode", mode_name[m2]); | |
269 | break; | |
270 | case 'c': | |
271 | printf ("%s", rtx_name[op]); | |
272 | break; | |
273 | case 'C': | |
274 | for (np = rtx_name[op]; *np; np++) | |
275 | printf ("%c", toupper ((unsigned char)*np)); | |
276 | break; | |
277 | } | |
278 | } | |
279 | ||
280 | printf (";\n"); | |
281 | } | |
282 | \f | |
283 | PTR | |
284 | xmalloc (size) | |
285 | size_t size; | |
286 | { | |
287 | register PTR val = (PTR) malloc (size); | |
288 | ||
289 | if (val == 0) | |
290 | fatal ("virtual memory exhausted"); | |
291 | ||
292 | return val; | |
293 | } | |
294 | ||
295 | PTR | |
296 | xrealloc (ptr, size) | |
297 | PTR ptr; | |
298 | size_t size; | |
299 | { | |
300 | register PTR result = (PTR) realloc (ptr, size); | |
301 | if (!result) | |
302 | fatal ("virtual memory exhausted"); | |
303 | return result; | |
304 | } | |
305 | ||
306 | static void | |
307 | fatal VPROTO ((char *format, ...)) | |
308 | { | |
309 | #ifndef ANSI_PROTOTYPES | |
310 | char *format; | |
311 | #endif | |
312 | va_list ap; | |
313 | ||
314 | VA_START (ap, format); | |
315 | ||
316 | #ifndef ANSI_PROTOTYPES | |
317 | format = va_arg (ap, char *); | |
318 | #endif | |
319 | ||
320 | fprintf (stderr, "genopinit: "); | |
321 | vfprintf (stderr, format, ap); | |
322 | va_end (ap); | |
323 | fprintf (stderr, "\n"); | |
324 | exit (FATAL_EXIT_CODE); | |
325 | } | |
326 | ||
327 | /* More 'friendly' abort that prints the line and file. | |
328 | config.h can #define abort fancy_abort if you like that sort of thing. */ | |
329 | ||
330 | void | |
331 | fancy_abort () | |
332 | { | |
333 | fatal ("Internal gcc abort."); | |
334 | } | |
335 | \f | |
336 | int | |
337 | main (argc, argv) | |
338 | int argc; | |
339 | char **argv; | |
340 | { | |
341 | rtx desc; | |
342 | FILE *infile; | |
343 | register int c; | |
344 | ||
345 | obstack_init (rtl_obstack); | |
346 | ||
347 | if (argc <= 1) | |
348 | fatal ("No input file name."); | |
349 | ||
350 | infile = fopen (argv[1], "r"); | |
351 | if (infile == 0) | |
352 | { | |
353 | perror (argv[1]); | |
354 | exit (FATAL_EXIT_CODE); | |
355 | } | |
356 | ||
357 | init_rtl (); | |
358 | ||
359 | printf ("/* Generated automatically by the program `genopinit'\n\ | |
360 | from the machine description file `md'. */\n\n"); | |
361 | ||
362 | printf ("#include \"config.h\"\n"); | |
363 | printf ("#include \"system.h\"\n"); | |
364 | printf ("#include \"rtl.h\"\n"); | |
365 | printf ("#include \"flags.h\"\n"); | |
366 | printf ("#include \"insn-flags.h\"\n"); | |
367 | printf ("#include \"insn-codes.h\"\n"); | |
368 | printf ("#include \"insn-config.h\"\n"); | |
369 | printf ("#include \"recog.h\"\n"); | |
370 | printf ("#include \"expr.h\"\n"); | |
371 | printf ("#include \"reload.h\"\n\n"); | |
372 | ||
373 | printf ("void\ninit_all_optabs ()\n{\n"); | |
374 | ||
375 | /* Read the machine description. */ | |
376 | ||
377 | while (1) | |
378 | { | |
379 | c = read_skip_spaces (infile); | |
380 | if (c == EOF) | |
381 | break; | |
382 | ungetc (c, infile); | |
383 | ||
384 | desc = read_rtx (infile); | |
385 | if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND) | |
386 | gen_insn (desc); | |
387 | } | |
388 | ||
389 | printf ("}\n"); | |
390 | ||
391 | fflush (stdout); | |
392 | exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); | |
393 | /* NOTREACHED */ | |
394 | return 0; | |
395 | } |