1 /* Generate code to initialize optabs from machine description.
2 Copyright (C) 1993, 94-97, 1998 Free Software Foundation, Inc.
4 This file is part of GNU CC.
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)
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.
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. */
27 static struct obstack obstack;
28 struct obstack *rtl_obstack = &obstack;
30 #define obstack_chunk_alloc xmalloc
31 #define obstack_chunk_free free
33 char *xmalloc PROTO((unsigned));
34 static void fatal PVPROTO ((char *, ...))
35 ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
36 void fancy_abort PROTO((void)) ATTRIBUTE_NORETURN;
38 /* Many parts of GCC use arrays that are indexed by machine mode and
39 contain the insn codes for pattern in the MD file that perform a given
40 operation on operands of that mode.
42 These patterns are present in the MD file with names that contain
43 the mode(s) used and the name of the operation. This program
44 writes a function `init_all_optabs' that initializes the optabs with
45 all the insn codes of the relevant patterns present in the MD file.
47 This array contains a list of optabs that need to be initialized. Within
48 each string, the name of the pattern to be matched against is delimited
49 with %( and %). In the string, %a and %b are used to match a short mode
50 name (the part of the mode name not including `mode' and converted to
51 lower-case). When writing out the initializer, the entire string is
52 used. %A and %B are replaced with the full name of the mode; %a and %b
53 are replaced with the short form of the name, as above.
55 If %N is present in the pattern, it means the two modes must be consecutive
56 widths in the same mode class (e.g, QImode and HImode). %I means that
57 only integer modes should be considered for the next mode, and %F means
58 that only float modes should be considered.
60 For some optabs, we store the operation by RTL codes. These are only
61 used for comparisons. In that case, %c and %C are the lower-case and
62 upper-case forms of the comparison, respectively. */
64 /* The reason we use \% is to avoid sequences of the form %-capletter-%
65 which SCCS treats as magic. This gets warnings which you should ignore. */
68 { "extendtab[(int) %B][(int) %A][0] = CODE_FOR_%(extend%a\%b2%)",
69 "extendtab[(int) %B][(int) %A][1] = CODE_FOR_%(zero_extend%a\%b2%)",
70 "fixtab[(int) %A][(int) %B][0] = CODE_FOR_%(fix%F\%a%I\%b2%)",
71 "fixtab[(int) %A][(int) %B][1] = CODE_FOR_%(fixuns%F\%a%b2%)",
72 "fixtrunctab[(int) %A][(int) %B][0] = CODE_FOR_%(fix_trunc%F\%a%I\%b2%)",
73 "fixtrunctab[(int) %A][(int) %B][1] = CODE_FOR_%(fixuns_trunc%F\%a%I\%b2%)",
74 "floattab[(int) %B][(int) %A][0] = CODE_FOR_%(float%I\%a%F\%b2%)",
75 "floattab[(int) %B][(int) %A][1] = CODE_FOR_%(floatuns%I\%a%F\%b2%)",
76 "add_optab->handlers[(int) %A].insn_code = CODE_FOR_%(add%a3%)",
77 "sub_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sub%a3%)",
78 "smul_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mul%a3%)",
79 "umul_highpart_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umul%a3_highpart%)",
80 "smul_highpart_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smul%a3_highpart%)",
81 "smul_widen_optab->handlers[(int) %B].insn_code = CODE_FOR_%(mul%a%b3%)%N",
82 "umul_widen_optab->handlers[(int) %B].insn_code = CODE_FOR_%(umul%a%b3%)%N",
83 "sdiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(div%I\%a3%)",
84 "udiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(udiv%I\%a3%)",
85 "sdivmod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(divmod%a4%)",
86 "udivmod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(udivmod%a4%)",
87 "smod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mod%a3%)",
88 "umod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umod%a3%)",
89 "flodiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(div%F\%a3%)",
90 "ftrunc_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ftrunc%F\%a2%)",
91 "and_optab->handlers[(int) %A].insn_code = CODE_FOR_%(and%a3%)",
92 "ior_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ior%a3%)",
93 "xor_optab->handlers[(int) %A].insn_code = CODE_FOR_%(xor%a3%)",
94 "ashl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ashl%a3%)",
95 "ashr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ashr%a3%)",
96 "lshr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(lshr%a3%)",
97 "rotl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(rotl%a3%)",
98 "rotr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(rotr%a3%)",
99 "smin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smin%I\%a3%)",
100 "smin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(min%F\%a3%)",
101 "smax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smax%I\%a3%)",
102 "smax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(max%F\%a3%)",
103 "umin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umin%I\%a3%)",
104 "umax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umax%I\%a3%)",
105 "neg_optab->handlers[(int) %A].insn_code = CODE_FOR_%(neg%a2%)",
106 "abs_optab->handlers[(int) %A].insn_code = CODE_FOR_%(abs%a2%)",
107 "sqrt_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sqrt%a2%)",
108 "sin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sin%a2%)",
109 "cos_optab->handlers[(int) %A].insn_code = CODE_FOR_%(cos%a2%)",
110 "strlen_optab->handlers[(int) %A].insn_code = CODE_FOR_%(strlen%a%)",
111 "one_cmpl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(one_cmpl%a2%)",
112 "ffs_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ffs%a2%)",
113 "mov_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mov%a%)",
114 "movstrict_optab->handlers[(int) %A].insn_code = CODE_FOR_%(movstrict%a%)",
115 "cmp_optab->handlers[(int) %A].insn_code = CODE_FOR_%(cmp%a%)",
116 "tst_optab->handlers[(int) %A].insn_code = CODE_FOR_%(tst%a%)",
117 "bcc_gen_fctn[(int) %C] = gen_%(b%c%)",
118 "setcc_gen_code[(int) %C] = CODE_FOR_%(s%c%)",
119 "movcc_gen_code[(int) %A] = CODE_FOR_%(mov%acc%)",
120 "reload_in_optab[(int) %A] = CODE_FOR_%(reload_in%a%)",
121 "reload_out_optab[(int) %A] = CODE_FOR_%(reload_out%a%)",
122 "movstr_optab[(int) %A] = CODE_FOR_%(movstr%a%)",
123 "clrstr_optab[(int) %A] = CODE_FOR_%(clrstr%a%)" };
125 /* Allow linking with print-rtl.c. */
126 char **insn_name_ptr;
128 static void gen_insn PROTO((rtx));
134 char *name = XSTR (insn, 0);
138 char *np, *pp, *p, *q;
140 /* Don't mention instructions whose names are the null string.
141 They are in the machine description just to be recognized. */
145 /* See if NAME matches one of the patterns we have for the optabs we know
148 for (pindex = 0; pindex < sizeof optabs / sizeof optabs[0]; pindex++)
150 int force_float = 0, force_int = 0;
151 int force_consec = 0;
154 for (pp = optabs[pindex]; pp[0] != '%' || pp[1] != '('; pp++)
157 for (pp += 2, np = name; matches && ! (pp[0] == '%' && pp[1] == ')');
178 for (op = 0; op < NUM_RTX_CODE; op++)
180 for (p = rtx_name[op], q = np; *p; p++, q++)
184 /* We have to be concerned about matching "gt" and
185 missing "gtu", e.g., so verify we have reached the
186 end of thing we are to match. */
187 if (*p == 0 && *q == 0 && rtx_class[op] == '<')
191 if (op == NUM_RTX_CODE)
194 np += strlen (rtx_name[op]);
198 /* This loop will stop at the first prefix match, so
199 look through the modes in reverse order, in case
200 EXTRA_CC_MODES was used and CC is a prefix of the
201 CC modes (as it should be). */
202 for (i = ((int) MAX_MACHINE_MODE) - 1; i >= 0; i--)
204 for (p = mode_name[i], q = np; *p; p++, q++)
205 if (tolower ((unsigned char)*p) != *q)
209 && (! force_int || mode_class[i] == MODE_INT)
210 && (! force_float || mode_class[i] == MODE_FLOAT))
217 m1 = i, np += strlen (mode_name[i]);
219 m2 = i, np += strlen (mode_name[i]);
221 force_int = force_float = 0;
229 if (matches && pp[0] == '%' && pp[1] == ')'
231 && (! force_consec || (int) GET_MODE_WIDER_MODE(m1) == m2))
235 if (pindex == sizeof optabs / sizeof optabs[0])
238 /* We found a match. If this pattern is only conditionally present,
239 write out the "if" and two extra blanks. */
241 if (*XSTR (insn, 2) != 0)
242 printf (" if (HAVE_%s)\n ", name);
246 /* Now write out the initialization, making all required substitutions. */
247 for (pp = optabs[pindex]; *pp; pp++)
255 case 'I': case 'F': case 'N':
258 for (np = mode_name[m1]; *np; np++)
259 printf ("%c", tolower ((unsigned char)*np));
262 for (np = mode_name[m2]; *np; np++)
263 printf ("%c", tolower ((unsigned char)*np));
266 printf ("%smode", mode_name[m1]);
269 printf ("%smode", mode_name[m2]);
272 printf ("%s", rtx_name[op]);
275 for (np = rtx_name[op]; *np; np++)
276 printf ("%c", toupper ((unsigned char)*np));
288 register char *val = (char *) malloc (size);
291 fatal ("virtual memory exhausted");
301 char *result = (char *) realloc (ptr, size);
303 fatal ("virtual memory exhausted");
308 fatal VPROTO ((char *format, ...))
315 VA_START (ap, format);
318 format = va_arg (ap, char *);
321 fprintf (stderr, "genopinit: ");
322 vfprintf (stderr, format, ap);
324 fprintf (stderr, "\n");
325 exit (FATAL_EXIT_CODE);
328 /* More 'friendly' abort that prints the line and file.
329 config.h can #define abort fancy_abort if you like that sort of thing. */
334 fatal ("Internal gcc abort.");
346 obstack_init (rtl_obstack);
349 fatal ("No input file name.");
351 infile = fopen (argv[1], "r");
355 exit (FATAL_EXIT_CODE);
360 printf ("/* Generated automatically by the program `genopinit'\n\
361 from the machine description file `md'. */\n\n");
363 printf ("#include \"config.h\"\n");
364 printf ("#include \"system.h\"\n");
365 printf ("#include \"rtl.h\"\n");
366 printf ("#include \"flags.h\"\n");
367 printf ("#include \"insn-flags.h\"\n");
368 printf ("#include \"insn-codes.h\"\n");
369 printf ("#include \"insn-config.h\"\n");
370 printf ("#include \"recog.h\"\n");
371 printf ("#include \"expr.h\"\n");
372 printf ("#include \"reload.h\"\n\n");
374 printf ("void\ninit_all_optabs ()\n{\n");
376 /* Read the machine description. */
380 c = read_skip_spaces (infile);
385 desc = read_rtx (infile);
386 if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
393 exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);