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1 | /* Generate code to initialize optabs from machine description. | |
2 | Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, | |
3 | 1999, 2000 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | ||
23 | #include "hconfig.h" | |
24 | #include "system.h" | |
25 | #include "rtl.h" | |
26 | #include "errors.h" | |
27 | #include "gensupport.h" | |
28 | ||
29 | ||
30 | /* Many parts of GCC use arrays that are indexed by machine mode and | |
31 | contain the insn codes for pattern in the MD file that perform a given | |
32 | operation on operands of that mode. | |
33 | ||
34 | These patterns are present in the MD file with names that contain | |
35 | the mode(s) used and the name of the operation. This program | |
36 | writes a function `init_all_optabs' that initializes the optabs with | |
37 | all the insn codes of the relevant patterns present in the MD file. | |
38 | ||
39 | This array contains a list of optabs that need to be initialized. Within | |
40 | each string, the name of the pattern to be matched against is delimited | |
41 | with $( and $). In the string, $a and $b are used to match a short mode | |
42 | name (the part of the mode name not including `mode' and converted to | |
43 | lower-case). When writing out the initializer, the entire string is | |
44 | used. $A and $B are replaced with the full name of the mode; $a and $b | |
45 | are replaced with the short form of the name, as above. | |
46 | ||
47 | If $N is present in the pattern, it means the two modes must be consecutive | |
48 | widths in the same mode class (e.g, QImode and HImode). $I means that | |
49 | only full integer modes should be considered for the next mode, and $F | |
50 | means that only float modes should be considered. | |
51 | $P means that both full and partial integer modes should be considered. | |
52 | ||
53 | $V means to emit 'v' if the first mode is a MODE_FLOAT mode. | |
54 | ||
55 | For some optabs, we store the operation by RTL codes. These are only | |
56 | used for comparisons. In that case, $c and $C are the lower-case and | |
57 | upper-case forms of the comparison, respectively. */ | |
58 | ||
59 | const char * const optabs[] = | |
60 | { "extendtab[$B][$A][0] = CODE_FOR_$(extend$a$b2$)", | |
61 | "extendtab[$B][$A][1] = CODE_FOR_$(zero_extend$a$b2$)", | |
62 | "fixtab[$A][$B][0] = CODE_FOR_$(fix$F$a$I$b2$)", | |
63 | "fixtab[$A][$B][1] = CODE_FOR_$(fixuns$F$a$b2$)", | |
64 | "fixtrunctab[$A][$B][0] = CODE_FOR_$(fix_trunc$F$a$I$b2$)", | |
65 | "fixtrunctab[$A][$B][1] = CODE_FOR_$(fixuns_trunc$F$a$I$b2$)", | |
66 | "floattab[$B][$A][0] = CODE_FOR_$(float$I$a$F$b2$)", | |
67 | "floattab[$B][$A][1] = CODE_FOR_$(floatuns$I$a$F$b2$)", | |
68 | "add_optab->handlers[$A].insn_code = CODE_FOR_$(add$P$a3$)", | |
69 | "addv_optab->handlers[(int) $A].insn_code =\n\ | |
70 | add_optab->handlers[(int) $A].insn_code = CODE_FOR_$(add$F$a3$)", | |
71 | "addv_optab->handlers[(int) $A].insn_code = CODE_FOR_$(addv$I$a3$)", | |
72 | "sub_optab->handlers[$A].insn_code = CODE_FOR_$(sub$P$a3$)", | |
73 | "subv_optab->handlers[(int) $A].insn_code =\n\ | |
74 | sub_optab->handlers[(int) $A].insn_code = CODE_FOR_$(sub$F$a3$)", | |
75 | "subv_optab->handlers[(int) $A].insn_code = CODE_FOR_$(subv$I$a3$)", | |
76 | "smul_optab->handlers[$A].insn_code = CODE_FOR_$(mul$P$a3$)", | |
77 | "smulv_optab->handlers[(int) $A].insn_code =\n\ | |
78 | smul_optab->handlers[(int) $A].insn_code = CODE_FOR_$(mul$F$a3$)", | |
79 | "smulv_optab->handlers[(int) $A].insn_code = CODE_FOR_$(mulv$I$a3$)", | |
80 | "umul_highpart_optab->handlers[$A].insn_code = CODE_FOR_$(umul$a3_highpart$)", | |
81 | "smul_highpart_optab->handlers[$A].insn_code = CODE_FOR_$(smul$a3_highpart$)", | |
82 | "smul_widen_optab->handlers[$B].insn_code = CODE_FOR_$(mul$a$b3$)$N", | |
83 | "umul_widen_optab->handlers[$B].insn_code = CODE_FOR_$(umul$a$b3$)$N", | |
84 | "sdiv_optab->handlers[$A].insn_code = CODE_FOR_$(div$I$a3$)", | |
85 | "sdivv_optab->handlers[(int) $A].insn_code = CODE_FOR_$(div$V$I$a3$)", | |
86 | "udiv_optab->handlers[$A].insn_code = CODE_FOR_$(udiv$I$a3$)", | |
87 | "sdivmod_optab->handlers[$A].insn_code = CODE_FOR_$(divmod$a4$)", | |
88 | "udivmod_optab->handlers[$A].insn_code = CODE_FOR_$(udivmod$a4$)", | |
89 | "smod_optab->handlers[$A].insn_code = CODE_FOR_$(mod$a3$)", | |
90 | "umod_optab->handlers[$A].insn_code = CODE_FOR_$(umod$a3$)", | |
91 | "flodiv_optab->handlers[$A].insn_code = CODE_FOR_$(div$F$a3$)", | |
92 | "ftrunc_optab->handlers[$A].insn_code = CODE_FOR_$(ftrunc$F$a2$)", | |
93 | "and_optab->handlers[$A].insn_code = CODE_FOR_$(and$a3$)", | |
94 | "ior_optab->handlers[$A].insn_code = CODE_FOR_$(ior$a3$)", | |
95 | "xor_optab->handlers[$A].insn_code = CODE_FOR_$(xor$a3$)", | |
96 | "ashl_optab->handlers[$A].insn_code = CODE_FOR_$(ashl$a3$)", | |
97 | "ashr_optab->handlers[$A].insn_code = CODE_FOR_$(ashr$a3$)", | |
98 | "lshr_optab->handlers[$A].insn_code = CODE_FOR_$(lshr$a3$)", | |
99 | "rotl_optab->handlers[$A].insn_code = CODE_FOR_$(rotl$a3$)", | |
100 | "rotr_optab->handlers[$A].insn_code = CODE_FOR_$(rotr$a3$)", | |
101 | "smin_optab->handlers[$A].insn_code = CODE_FOR_$(smin$I$a3$)", | |
102 | "smin_optab->handlers[$A].insn_code = CODE_FOR_$(min$F$a3$)", | |
103 | "smax_optab->handlers[$A].insn_code = CODE_FOR_$(smax$I$a3$)", | |
104 | "smax_optab->handlers[$A].insn_code = CODE_FOR_$(max$F$a3$)", | |
105 | "umin_optab->handlers[$A].insn_code = CODE_FOR_$(umin$I$a3$)", | |
106 | "umax_optab->handlers[$A].insn_code = CODE_FOR_$(umax$I$a3$)", | |
107 | "neg_optab->handlers[$A].insn_code = CODE_FOR_$(neg$P$a2$)", | |
108 | "negv_optab->handlers[(int) $A].insn_code =\n\ | |
109 | neg_optab->handlers[(int) $A].insn_code = CODE_FOR_$(neg$F$a2$)", | |
110 | "negv_optab->handlers[(int) $A].insn_code = CODE_FOR_$(negv$I$a2$)", | |
111 | "abs_optab->handlers[$A].insn_code = CODE_FOR_$(abs$P$a2$)", | |
112 | "absv_optab->handlers[(int) $A].insn_code =\n\ | |
113 | abs_optab->handlers[(int) $A].insn_code = CODE_FOR_$(abs$F$a2$)", | |
114 | "absv_optab->handlers[(int) $A].insn_code = CODE_FOR_$(absv$I$a2$)", | |
115 | "sqrt_optab->handlers[$A].insn_code = CODE_FOR_$(sqrt$a2$)", | |
116 | "sin_optab->handlers[$A].insn_code = CODE_FOR_$(sin$a2$)", | |
117 | "cos_optab->handlers[$A].insn_code = CODE_FOR_$(cos$a2$)", | |
118 | "strlen_optab->handlers[$A].insn_code = CODE_FOR_$(strlen$a$)", | |
119 | "one_cmpl_optab->handlers[$A].insn_code = CODE_FOR_$(one_cmpl$a2$)", | |
120 | "ffs_optab->handlers[$A].insn_code = CODE_FOR_$(ffs$a2$)", | |
121 | "mov_optab->handlers[$A].insn_code = CODE_FOR_$(mov$a$)", | |
122 | "movstrict_optab->handlers[$A].insn_code = CODE_FOR_$(movstrict$a$)", | |
123 | "cmp_optab->handlers[$A].insn_code = CODE_FOR_$(cmp$a$)", | |
124 | "tst_optab->handlers[$A].insn_code = CODE_FOR_$(tst$a$)", | |
125 | "bcc_gen_fctn[$C] = gen_$(b$c$)", | |
126 | "setcc_gen_code[$C] = CODE_FOR_$(s$c$)", | |
127 | "movcc_gen_code[$A] = CODE_FOR_$(mov$acc$)", | |
128 | "cbranch_optab->handlers[$A].insn_code = CODE_FOR_$(cbranch$a4$)", | |
129 | "cmov_optab->handlers[$A].insn_code = CODE_FOR_$(cmov$a6$)", | |
130 | "cstore_optab->handlers[$A].insn_code = CODE_FOR_$(cstore$a4$)", | |
131 | "push_optab->handlers[$A].insn_code = CODE_FOR_$(push$a1$)", | |
132 | "reload_in_optab[$A] = CODE_FOR_$(reload_in$a$)", | |
133 | "reload_out_optab[$A] = CODE_FOR_$(reload_out$a$)", | |
134 | "movstr_optab[$A] = CODE_FOR_$(movstr$a$)", | |
135 | "clrstr_optab[$A] = CODE_FOR_$(clrstr$a$)" }; | |
136 | ||
137 | static void gen_insn PARAMS ((rtx)); | |
138 | ||
139 | static void | |
140 | gen_insn (insn) | |
141 | rtx insn; | |
142 | { | |
143 | const char *name = XSTR (insn, 0); | |
144 | int m1 = 0, m2 = 0, op = 0; | |
145 | size_t pindex; | |
146 | int i; | |
147 | const char *np, *pp, *p, *q; | |
148 | ||
149 | /* Don't mention instructions whose names are the null string. | |
150 | They are in the machine description just to be recognized. */ | |
151 | if (*name == 0) | |
152 | return; | |
153 | ||
154 | /* See if NAME matches one of the patterns we have for the optabs we know | |
155 | about. */ | |
156 | ||
157 | for (pindex = 0; pindex < ARRAY_SIZE (optabs); pindex++) | |
158 | { | |
159 | int force_float = 0, force_int = 0, force_partial_int = 0; | |
160 | int force_consec = 0; | |
161 | int matches = 1; | |
162 | ||
163 | for (pp = optabs[pindex]; pp[0] != '$' || pp[1] != '('; pp++) | |
164 | ; | |
165 | ||
166 | for (pp += 2, np = name; matches && ! (pp[0] == '$' && pp[1] == ')'); | |
167 | pp++) | |
168 | { | |
169 | if (*pp != '$') | |
170 | { | |
171 | if (*pp != *np++) | |
172 | break; | |
173 | } | |
174 | else | |
175 | switch (*++pp) | |
176 | { | |
177 | case 'N': | |
178 | force_consec = 1; | |
179 | break; | |
180 | case 'I': | |
181 | force_int = 1; | |
182 | break; | |
183 | case 'P': | |
184 | force_partial_int = 1; | |
185 | break; | |
186 | case 'F': | |
187 | force_float = 1; | |
188 | break; | |
189 | case 'V': | |
190 | break; | |
191 | case 'c': | |
192 | for (op = 0; op < NUM_RTX_CODE; op++) | |
193 | { | |
194 | for (p = GET_RTX_NAME(op), q = np; *p; p++, q++) | |
195 | if (*p != *q) | |
196 | break; | |
197 | ||
198 | /* We have to be concerned about matching "gt" and | |
199 | missing "gtu", e.g., so verify we have reached the | |
200 | end of thing we are to match. */ | |
201 | if (*p == 0 && *q == 0 && GET_RTX_CLASS(op) == '<') | |
202 | break; | |
203 | } | |
204 | ||
205 | if (op == NUM_RTX_CODE) | |
206 | matches = 0; | |
207 | else | |
208 | np += strlen (GET_RTX_NAME(op)); | |
209 | break; | |
210 | case 'a': | |
211 | case 'b': | |
212 | /* This loop will stop at the first prefix match, so | |
213 | look through the modes in reverse order, in case | |
214 | EXTRA_CC_MODES was used and CC is a prefix of the | |
215 | CC modes (as it should be). */ | |
216 | for (i = ((int) MAX_MACHINE_MODE) - 1; i >= 0; i--) | |
217 | { | |
218 | for (p = GET_MODE_NAME(i), q = np; *p; p++, q++) | |
219 | if (TOLOWER (*p) != *q) | |
220 | break; | |
221 | ||
222 | if (*p == 0 | |
223 | && (! force_int || mode_class[i] == MODE_INT) | |
224 | && (! force_partial_int | |
225 | || mode_class[i] == MODE_INT | |
226 | || mode_class[i] == MODE_PARTIAL_INT) | |
227 | && (! force_float || mode_class[i] == MODE_FLOAT)) | |
228 | break; | |
229 | } | |
230 | ||
231 | if (i < 0) | |
232 | matches = 0; | |
233 | else if (*pp == 'a') | |
234 | m1 = i, np += strlen (GET_MODE_NAME(i)); | |
235 | else | |
236 | m2 = i, np += strlen (GET_MODE_NAME(i)); | |
237 | ||
238 | force_int = force_partial_int = force_float = 0; | |
239 | break; | |
240 | ||
241 | default: | |
242 | abort (); | |
243 | } | |
244 | } | |
245 | ||
246 | if (matches && pp[0] == '$' && pp[1] == ')' | |
247 | && *np == 0 | |
248 | && (! force_consec || (int) GET_MODE_WIDER_MODE(m1) == m2)) | |
249 | break; | |
250 | } | |
251 | ||
252 | if (pindex == ARRAY_SIZE (optabs)) | |
253 | return; | |
254 | ||
255 | /* We found a match. If this pattern is only conditionally present, | |
256 | write out the "if" and two extra blanks. */ | |
257 | ||
258 | if (*XSTR (insn, 2) != 0) | |
259 | printf (" if (HAVE_%s)\n ", name); | |
260 | ||
261 | printf (" "); | |
262 | ||
263 | /* Now write out the initialization, making all required substitutions. */ | |
264 | for (pp = optabs[pindex]; *pp; pp++) | |
265 | { | |
266 | if (*pp != '$') | |
267 | putchar (*pp); | |
268 | else | |
269 | switch (*++pp) | |
270 | { | |
271 | case '(': case ')': | |
272 | case 'I': case 'F': case 'N': | |
273 | break; | |
274 | case 'V': | |
275 | if (GET_MODE_CLASS (m1) == MODE_FLOAT) | |
276 | printf ("v"); | |
277 | break; | |
278 | case 'a': | |
279 | for (np = GET_MODE_NAME(m1); *np; np++) | |
280 | putchar (TOLOWER (*np)); | |
281 | break; | |
282 | case 'b': | |
283 | for (np = GET_MODE_NAME(m2); *np; np++) | |
284 | putchar (TOLOWER (*np)); | |
285 | break; | |
286 | case 'A': | |
287 | printf ("(int) %smode", GET_MODE_NAME(m1)); | |
288 | break; | |
289 | case 'B': | |
290 | printf ("(int) %smode", GET_MODE_NAME(m2)); | |
291 | break; | |
292 | case 'c': | |
293 | printf ("%s", GET_RTX_NAME(op)); | |
294 | break; | |
295 | case 'C': | |
296 | printf ("(int) "); | |
297 | for (np = GET_RTX_NAME(op); *np; np++) | |
298 | putchar (TOUPPER (*np)); | |
299 | break; | |
300 | } | |
301 | } | |
302 | ||
303 | printf (";\n"); | |
304 | } | |
305 | ||
306 | extern int main PARAMS ((int, char **)); | |
307 | ||
308 | int | |
309 | main (argc, argv) | |
310 | int argc; | |
311 | char **argv; | |
312 | { | |
313 | rtx desc; | |
314 | ||
315 | progname = "genopinit"; | |
316 | ||
317 | if (argc <= 1) | |
318 | fatal ("No input file name."); | |
319 | ||
320 | if (init_md_reader (argv[1]) != SUCCESS_EXIT_CODE) | |
321 | return (FATAL_EXIT_CODE); | |
322 | ||
323 | printf ("/* Generated automatically by the program `genopinit'\n\ | |
324 | from the machine description file `md'. */\n\n"); | |
325 | ||
326 | printf ("#include \"config.h\"\n"); | |
327 | printf ("#include \"system.h\"\n"); | |
328 | printf ("#include \"rtl.h\"\n"); | |
329 | printf ("#include \"flags.h\"\n"); | |
330 | printf ("#include \"insn-config.h\"\n"); | |
331 | printf ("#include \"recog.h\"\n"); | |
332 | printf ("#include \"expr.h\"\n"); | |
333 | printf ("#include \"optabs.h\"\n"); | |
334 | printf ("#include \"reload.h\"\n\n"); | |
335 | ||
336 | printf ("void\ninit_all_optabs ()\n{\n"); | |
337 | ||
338 | /* Read the machine description. */ | |
339 | ||
340 | while (1) | |
341 | { | |
342 | int line_no, insn_code_number = 0; | |
343 | ||
344 | desc = read_md_rtx (&line_no, &insn_code_number); | |
345 | if (desc == NULL) | |
346 | break; | |
347 | ||
348 | if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND) | |
349 | gen_insn (desc); | |
350 | } | |
351 | ||
352 | printf ("}\n"); | |
353 | ||
354 | fflush (stdout); | |
355 | return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); | |
356 | } | |
357 | ||
358 | /* Define this so we can link with print-rtl.o to get debug_rtx function. */ | |
359 | const char * | |
360 | get_insn_name (code) | |
361 | int code ATTRIBUTE_UNUSED; | |
362 | { | |
363 | return NULL; | |
364 | } |