2 Copyright (C) 1987, 1988, 1991, 1994, 1997, 1998, 1999, 2000, 2001, 2002,
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 /* Disable rtl checking; it conflicts with the macro handling. */
26 #undef ENABLE_RTL_CHECKING
29 #include "coretypes.h"
35 static htab_t md_constants;
37 /* One element in a singly-linked list of (integer, string) pairs. */
39 struct map_value *next;
44 /* Maps a macro or attribute name to a list of (integer, string) pairs.
45 The integers are mode or code values; the strings are either C conditions
46 or attribute values. */
48 /* The name of the macro or attribute. */
51 /* The group (modes or codes) to which the macro or attribute belongs. */
52 struct macro_group *group;
54 /* Gives a unique number to the attribute or macro. Numbers are
55 allocated consecutively, starting at 0. */
58 /* The list of (integer, string) pairs. */
59 struct map_value *values;
62 /* A structure for abstracting the common parts of code and mode macros. */
64 /* Tables of "mapping" structures, one for attributes and one for macros. */
67 /* The number of "real" modes or codes (and by extension, the first
68 number available for use as a macro placeholder). */
71 /* Treat the given string as the name of a standard mode or code and
72 return its integer value. Use the given file for error reporting. */
73 int (*find_builtin) (const char *, FILE *);
75 /* Return true if the given rtx uses the given mode or code. */
76 bool (*uses_macro_p) (rtx, int);
78 /* Make the given rtx use the given mode or code. */
79 void (*apply_macro) (rtx, int);
82 /* Associates PTR (which can be a string, etc.) with the file location
83 specified by FILENAME and LINENO. */
90 /* A structure used to pass data from read_rtx to apply_macro_traverse
92 struct macro_traverse_data {
93 /* Instruction queue. */
95 /* Attributes seen for modes. */
96 struct map_value *mode_maps;
101 /* If CODE is the number of a code macro, return a real rtx code that
102 has the same format. Return CODE otherwise. */
103 #define BELLWETHER_CODE(CODE) \
104 ((CODE) < NUM_RTX_CODE ? CODE : bellwether_codes[CODE - NUM_RTX_CODE])
106 static void fatal_with_file_and_line (FILE *, const char *, ...)
107 ATTRIBUTE_PRINTF_2 ATTRIBUTE_NORETURN;
108 static void fatal_expected_char (FILE *, int, int) ATTRIBUTE_NORETURN;
109 static int find_mode (const char *, FILE *);
110 static bool uses_mode_macro_p (rtx, int);
111 static void apply_mode_macro (rtx, int);
112 static int find_code (const char *, FILE *);
113 static bool uses_code_macro_p (rtx, int);
114 static void apply_code_macro (rtx, int);
115 static const char *apply_macro_to_string (const char *, struct mapping *, int);
116 static rtx apply_macro_to_rtx (rtx, struct mapping *, int,
117 struct map_value *, FILE *);
118 static bool uses_macro_p (rtx, struct mapping *);
119 static const char *add_condition_to_string (const char *, const char *);
120 static void add_condition_to_rtx (rtx, const char *);
121 static int apply_macro_traverse (void **, void *);
122 static struct mapping *add_mapping (struct macro_group *, htab_t t,
123 const char *, FILE *);
124 static struct map_value **add_map_value (struct map_value **,
126 static void initialize_macros (void);
127 static void read_name (char *, FILE *);
128 static hashval_t leading_ptr_hash (const void *);
129 static int leading_ptr_eq_p (const void *, const void *);
130 static void set_rtx_ptr_loc (const void *, const char *, int);
131 static const struct ptr_loc *get_rtx_ptr_loc (const void *);
132 static char *read_string (FILE *, int);
133 static char *read_quoted_string (FILE *);
134 static char *read_braced_string (FILE *);
135 static void read_escape (FILE *);
136 static hashval_t def_hash (const void *);
137 static int def_name_eq_p (const void *, const void *);
138 static void read_constants (FILE *infile, char *tmp_char);
139 static void validate_const_int (FILE *, const char *);
140 static int find_macro (struct macro_group *, const char *, FILE *);
141 static struct mapping *read_mapping (struct macro_group *, htab_t, FILE *);
142 static void check_code_macro (struct mapping *, FILE *);
143 static rtx read_rtx_1 (FILE *, struct map_value **);
145 /* The mode and code macro structures. */
146 static struct macro_group modes, codes;
148 /* Index I is the value of BELLWETHER_CODE (I + NUM_RTX_CODE). */
149 static enum rtx_code *bellwether_codes;
151 /* Obstack used for allocating RTL strings. */
152 static struct obstack string_obstack;
154 /* A table of ptr_locs, hashed on the PTR field. */
155 static htab_t ptr_locs;
157 /* An obstack for the above. Plain xmalloc is a bit heavyweight for a
158 small structure like ptr_loc. */
159 static struct obstack ptr_loc_obstack;
161 /* A hash table of triples (A, B, C), where each of A, B and C is a condition
162 and A is equivalent to "B && C". This is used to keep track of the source
163 of conditions that are made up of separate rtx strings (such as the split
164 condition of a define_insn_and_split). */
165 static htab_t joined_conditions;
167 /* An obstack for allocating joined_conditions entries. */
168 static struct obstack joined_conditions_obstack;
170 /* Subroutines of read_rtx. */
172 /* The current line number for the file. */
173 int read_rtx_lineno = 1;
175 /* The filename for error reporting. */
176 const char *read_rtx_filename = "<unknown>";
179 fatal_with_file_and_line (FILE *infile, const char *msg, ...)
188 fprintf (stderr, "%s:%d: ", read_rtx_filename, read_rtx_lineno);
189 vfprintf (stderr, msg, ap);
192 /* Gather some following context. */
193 for (i = 0; i < sizeof (context)-1; ++i)
198 if (c == '\r' || c == '\n')
204 fprintf (stderr, "%s:%d: following context is `%s'\n",
205 read_rtx_filename, read_rtx_lineno, context);
211 /* Dump code after printing a message. Used when read_rtx finds
215 fatal_expected_char (FILE *infile, int expected_c, int actual_c)
217 fatal_with_file_and_line (infile, "expected character `%c', found `%c'",
218 expected_c, actual_c);
221 /* Implementations of the macro_group callbacks for modes. */
224 find_mode (const char *name, FILE *infile)
228 for (i = 0; i < NUM_MACHINE_MODES; i++)
229 if (strcmp (GET_MODE_NAME (i), name) == 0)
232 fatal_with_file_and_line (infile, "unknown mode `%s'", name);
236 uses_mode_macro_p (rtx x, int mode)
238 return (int) GET_MODE (x) == mode;
242 apply_mode_macro (rtx x, int mode)
247 /* Implementations of the macro_group callbacks for codes. */
250 find_code (const char *name, FILE *infile)
254 for (i = 0; i < NUM_RTX_CODE; i++)
255 if (strcmp (GET_RTX_NAME (i), name) == 0)
258 fatal_with_file_and_line (infile, "unknown rtx code `%s'", name);
262 uses_code_macro_p (rtx x, int code)
264 return (int) GET_CODE (x) == code;
268 apply_code_macro (rtx x, int code)
273 /* Map a code or mode attribute string P to the underlying string for
276 static struct map_value *
277 map_attr_string (const char *p, struct mapping *macro, int value)
283 /* If there's a "macro:" prefix, check whether the macro name matches.
284 Set ATTR to the start of the attribute name. */
285 attr = strchr (p, ':');
290 if (strncmp (p, macro->name, attr - p) != 0
291 || macro->name[attr - p] != 0)
296 /* Find the attribute specification. */
297 m = (struct mapping *) htab_find (macro->group->attrs, &attr);
301 /* Find the attribute value for VALUE. */
302 for (v = m->values; v != 0; v = v->next)
303 if (v->number == value)
309 /* Given an attribute string used as a machine mode, return an index
310 to store in the machine mode to be translated by
311 apply_macro_to_rtx. */
314 mode_attr_index (struct map_value **mode_maps, const char *string,
319 struct map_value *mv;
321 /* Copy the attribute string into permanent storage, without the
322 angle brackets around it. */
323 obstack_grow (&string_obstack, string + 1, strlen (string) - 2);
324 p = (char *) obstack_finish (&string_obstack);
326 /* Make sure the attribute is defined as either a code attribute or
328 attr = strchr (p, ':');
334 if (!htab_find (modes.attrs, &attr) && !htab_find (codes.attrs, &attr))
335 fatal_with_file_and_line (infile,
336 "undefined attribute '%s' used for mode",
339 mv = XNEW (struct map_value);
340 mv->number = *mode_maps == 0 ? 0 : (*mode_maps)->number + 1;
342 mv->next = *mode_maps;
345 /* We return a code which we can map back into this string: the
346 number of machine modes + the number of mode macros + the index
348 return MAX_MACHINE_MODE + htab_elements (modes.macros) + mv->number;
351 /* Apply MODE_MAPS to the top level of X. */
354 apply_mode_maps (rtx x, struct map_value *mode_maps, struct mapping *macro,
355 int value, FILE *infile)
359 struct map_value *pm;
361 offset = MAX_MACHINE_MODE + htab_elements (modes.macros);
362 if (GET_MODE (x) < offset)
365 indx = GET_MODE (x) - offset;
366 for (pm = mode_maps; pm; pm = pm->next)
368 if (pm->number == indx)
372 v = map_attr_string (pm->string, macro, value);
375 PUT_MODE (x, find_mode (v->string, infile));
382 /* Given that MACRO is being expanded as VALUE, apply the appropriate
383 string substitutions to STRING. Return the new string if any changes
384 were needed, otherwise return STRING itself. */
387 apply_macro_to_string (const char *string, struct mapping *macro, int value)
389 char *base, *copy, *p, *start, *end;
395 base = p = copy = ASTRDUP (string);
396 while ((start = strchr (p, '<')) && (end = strchr (start, '>')))
401 v = map_attr_string (p, macro, value);
406 /* Add everything between the last copied byte and the '<',
407 then add in the attribute value. */
408 obstack_grow (&string_obstack, base, start - base);
409 obstack_grow (&string_obstack, v->string, strlen (v->string));
414 obstack_grow (&string_obstack, base, strlen (base) + 1);
415 copy = obstack_finish (&string_obstack);
416 copy_rtx_ptr_loc (copy, string);
422 /* Return a copy of ORIGINAL in which all uses of MACRO have been
423 replaced by VALUE. */
426 apply_macro_to_rtx (rtx original, struct mapping *macro, int value,
427 struct map_value *mode_maps, FILE *infile)
429 struct macro_group *group;
430 const char *format_ptr;
433 enum rtx_code bellwether_code;
438 /* Create a shallow copy of ORIGINAL. */
439 bellwether_code = BELLWETHER_CODE (GET_CODE (original));
440 x = rtx_alloc (bellwether_code);
441 memcpy (x, original, RTX_SIZE (bellwether_code));
443 /* Change the mode or code itself. */
444 group = macro->group;
445 if (group->uses_macro_p (x, macro->index + group->num_builtins))
446 group->apply_macro (x, value);
449 apply_mode_maps (x, mode_maps, macro, value, infile);
451 /* Change each string and recursively change each rtx. */
452 format_ptr = GET_RTX_FORMAT (bellwether_code);
453 for (i = 0; format_ptr[i] != 0; i++)
454 switch (format_ptr[i])
457 XTMPL (x, i) = apply_macro_to_string (XTMPL (x, i), macro, value);
462 XSTR (x, i) = apply_macro_to_string (XSTR (x, i), macro, value);
466 XEXP (x, i) = apply_macro_to_rtx (XEXP (x, i), macro, value,
472 if (XVEC (original, i))
474 XVEC (x, i) = rtvec_alloc (XVECLEN (original, i));
475 for (j = 0; j < XVECLEN (x, i); j++)
476 XVECEXP (x, i, j) = apply_macro_to_rtx (XVECEXP (original, i, j),
477 macro, value, mode_maps,
488 /* Return true if X (or some subexpression of X) uses macro MACRO. */
491 uses_macro_p (rtx x, struct mapping *macro)
493 struct macro_group *group;
494 const char *format_ptr;
500 group = macro->group;
501 if (group->uses_macro_p (x, macro->index + group->num_builtins))
504 format_ptr = GET_RTX_FORMAT (BELLWETHER_CODE (GET_CODE (x)));
505 for (i = 0; format_ptr[i] != 0; i++)
506 switch (format_ptr[i])
509 if (uses_macro_p (XEXP (x, i), macro))
516 for (j = 0; j < XVECLEN (x, i); j++)
517 if (uses_macro_p (XVECEXP (x, i, j), macro))
527 /* Return a condition that must satisfy both ORIGINAL and EXTRA. If ORIGINAL
528 has the form "&& ..." (as used in define_insn_and_splits), assume that
529 EXTRA is already satisfied. Empty strings are treated like "true". */
532 add_condition_to_string (const char *original, const char *extra)
534 if (original != 0 && original[0] == '&' && original[1] == '&')
536 return join_c_conditions (original, extra);
539 /* Like add_condition, but applied to all conditions in rtx X. */
542 add_condition_to_rtx (rtx x, const char *extra)
544 switch (GET_CODE (x))
548 XSTR (x, 2) = add_condition_to_string (XSTR (x, 2), extra);
552 case DEFINE_PEEPHOLE:
553 case DEFINE_PEEPHOLE2:
554 case DEFINE_COND_EXEC:
555 XSTR (x, 1) = add_condition_to_string (XSTR (x, 1), extra);
558 case DEFINE_INSN_AND_SPLIT:
559 XSTR (x, 2) = add_condition_to_string (XSTR (x, 2), extra);
560 XSTR (x, 4) = add_condition_to_string (XSTR (x, 4), extra);
568 /* A htab_traverse callback. Search the EXPR_LIST given by DATA
569 for rtxes that use the macro in *SLOT. Replace each such rtx
570 with a list of expansions. */
573 apply_macro_traverse (void **slot, void *data)
575 struct macro_traverse_data *mtd = (struct macro_traverse_data *) data;
576 struct mapping *macro;
578 rtx elem, new_elem, original, x;
580 macro = (struct mapping *) *slot;
581 for (elem = mtd->queue; elem != 0; elem = XEXP (elem, 1))
582 if (uses_macro_p (XEXP (elem, 0), macro))
584 original = XEXP (elem, 0);
585 for (v = macro->values; v != 0; v = v->next)
587 x = apply_macro_to_rtx (original, macro, v->number,
588 mtd->mode_maps, mtd->infile);
589 add_condition_to_rtx (x, v->string);
590 if (v != macro->values)
592 /* Insert a new EXPR_LIST node after ELEM and put the
593 new expansion there. */
594 new_elem = rtx_alloc (EXPR_LIST);
595 XEXP (new_elem, 1) = XEXP (elem, 1);
596 XEXP (elem, 1) = new_elem;
605 /* Add a new "mapping" structure to hashtable TABLE. NAME is the name
606 of the mapping, GROUP is the group to which it belongs, and INFILE
607 is the file that defined the mapping. */
609 static struct mapping *
610 add_mapping (struct macro_group *group, htab_t table,
611 const char *name, FILE *infile)
616 m = XNEW (struct mapping);
617 m->name = xstrdup (name);
619 m->index = htab_elements (table);
622 slot = htab_find_slot (table, m, INSERT);
624 fatal_with_file_and_line (infile, "`%s' already defined", name);
630 /* Add the pair (NUMBER, STRING) to a list of map_value structures.
631 END_PTR points to the current null terminator for the list; return
632 a pointer the new null terminator. */
634 static struct map_value **
635 add_map_value (struct map_value **end_ptr, int number, const char *string)
637 struct map_value *value;
639 value = XNEW (struct map_value);
641 value->number = number;
642 value->string = string;
648 /* Do one-time initialization of the mode and code attributes. */
651 initialize_macros (void)
653 struct mapping *lower, *upper;
654 struct map_value **lower_ptr, **upper_ptr;
658 modes.attrs = htab_create (13, def_hash, def_name_eq_p, 0);
659 modes.macros = htab_create (13, def_hash, def_name_eq_p, 0);
660 modes.num_builtins = MAX_MACHINE_MODE;
661 modes.find_builtin = find_mode;
662 modes.uses_macro_p = uses_mode_macro_p;
663 modes.apply_macro = apply_mode_macro;
665 codes.attrs = htab_create (13, def_hash, def_name_eq_p, 0);
666 codes.macros = htab_create (13, def_hash, def_name_eq_p, 0);
667 codes.num_builtins = NUM_RTX_CODE;
668 codes.find_builtin = find_code;
669 codes.uses_macro_p = uses_code_macro_p;
670 codes.apply_macro = apply_code_macro;
672 lower = add_mapping (&modes, modes.attrs, "mode", 0);
673 upper = add_mapping (&modes, modes.attrs, "MODE", 0);
674 lower_ptr = &lower->values;
675 upper_ptr = &upper->values;
676 for (i = 0; i < MAX_MACHINE_MODE; i++)
678 copy = xstrdup (GET_MODE_NAME (i));
679 for (p = copy; *p != 0; p++)
682 upper_ptr = add_map_value (upper_ptr, i, GET_MODE_NAME (i));
683 lower_ptr = add_map_value (lower_ptr, i, copy);
686 lower = add_mapping (&codes, codes.attrs, "code", 0);
687 upper = add_mapping (&codes, codes.attrs, "CODE", 0);
688 lower_ptr = &lower->values;
689 upper_ptr = &upper->values;
690 for (i = 0; i < NUM_RTX_CODE; i++)
692 copy = xstrdup (GET_RTX_NAME (i));
693 for (p = copy; *p != 0; p++)
696 lower_ptr = add_map_value (lower_ptr, i, GET_RTX_NAME (i));
697 upper_ptr = add_map_value (upper_ptr, i, copy);
701 /* Return a hash value for the pointer pointed to by DEF. */
704 leading_ptr_hash (const void *def)
706 return htab_hash_pointer (*(const void *const *) def);
709 /* Return true if DEF1 and DEF2 are pointers to the same pointer. */
712 leading_ptr_eq_p (const void *def1, const void *def2)
714 return *(const void *const *) def1 == *(const void *const *) def2;
717 /* Associate PTR with the file position given by FILENAME and LINENO. */
720 set_rtx_ptr_loc (const void *ptr, const char *filename, int lineno)
724 loc = (struct ptr_loc *) obstack_alloc (&ptr_loc_obstack,
725 sizeof (struct ptr_loc));
727 loc->filename = filename;
728 loc->lineno = lineno;
729 *htab_find_slot (ptr_locs, loc, INSERT) = loc;
732 /* Return the position associated with pointer PTR. Return null if no
735 static const struct ptr_loc *
736 get_rtx_ptr_loc (const void *ptr)
738 return (const struct ptr_loc *) htab_find (ptr_locs, &ptr);
741 /* Associate NEW_PTR with the same file position as OLD_PTR. */
744 copy_rtx_ptr_loc (const void *new_ptr, const void *old_ptr)
746 const struct ptr_loc *loc = get_rtx_ptr_loc (old_ptr);
748 set_rtx_ptr_loc (new_ptr, loc->filename, loc->lineno);
751 /* If PTR is associated with a known file position, print a #line
755 print_rtx_ptr_loc (const void *ptr)
757 const struct ptr_loc *loc = get_rtx_ptr_loc (ptr);
759 printf ("#line %d \"%s\"\n", loc->lineno, loc->filename);
762 /* Return a condition that satisfies both COND1 and COND2. Either string
763 may be null or empty. */
766 join_c_conditions (const char *cond1, const char *cond2)
771 if (cond1 == 0 || cond1[0] == 0)
774 if (cond2 == 0 || cond2[0] == 0)
777 result = concat ("(", cond1, ") && (", cond2, ")", NULL);
778 obstack_ptr_grow (&joined_conditions_obstack, result);
779 obstack_ptr_grow (&joined_conditions_obstack, cond1);
780 obstack_ptr_grow (&joined_conditions_obstack, cond2);
781 entry = obstack_finish (&joined_conditions_obstack);
782 *htab_find_slot (joined_conditions, entry, INSERT) = entry;
786 /* Print condition COND, wrapped in brackets. If COND was created by
787 join_c_conditions, recursively invoke this function for the original
788 conditions and join the result with "&&". Otherwise print a #line
789 directive for COND if its original file position is known. */
792 print_c_condition (const char *cond)
794 const void **halves = htab_find (joined_conditions, &cond);
798 print_c_condition (halves[1]);
800 print_c_condition (halves[2]);
806 print_rtx_ptr_loc (cond);
807 printf ("(%s)", cond);
811 /* Read chars from INFILE until a non-whitespace char
812 and return that. Comments, both Lisp style and C style,
813 are treated as whitespace.
814 Tools such as genflags use this function. */
817 read_skip_spaces (FILE *infile)
830 case ' ': case '\t': case '\f': case '\r':
836 while (c != '\n' && c != EOF);
845 fatal_expected_char (infile, '*', c);
848 while ((c = getc (infile)) && c != EOF)
852 else if (prevc == '*' && c == '/')
865 /* Read an rtx code name into the buffer STR[].
866 It is terminated by any of the punctuation chars of rtx printed syntax. */
869 read_name (char *str, FILE *infile)
874 c = read_skip_spaces (infile);
879 if (c == ' ' || c == '\n' || c == '\t' || c == '\f' || c == '\r')
881 if (c == ':' || c == ')' || c == ']' || c == '"' || c == '/'
882 || c == '(' || c == '[')
891 fatal_with_file_and_line (infile, "missing name or number");
899 /* Do constant expansion. */
900 struct md_constant *def;
905 struct md_constant tmp_def;
908 def = (struct md_constant *) htab_find (md_constants, &tmp_def);
917 /* Subroutine of the string readers. Handles backslash escapes.
918 Caller has read the backslash, but not placed it into the obstack. */
920 read_escape (FILE *infile)
922 int c = getc (infile);
926 /* Backslash-newline is replaced by nothing, as in C. */
931 /* \" \' \\ are replaced by the second character. */
937 /* Standard C string escapes:
940 all are passed through to the output string unmolested.
941 In normal use these wind up in a string constant processed
942 by the C compiler, which will translate them appropriately.
943 We do not bother checking that \[0-7] are followed by up to
944 two octal digits, or that \x is followed by N hex digits.
945 \? \u \U are left out because they are not in traditional C. */
946 case 'a': case 'b': case 'f': case 'n': case 'r': case 't': case 'v':
947 case '0': case '1': case '2': case '3': case '4': case '5': case '6':
949 obstack_1grow (&string_obstack, '\\');
952 /* \; makes stuff for a C string constant containing
955 obstack_grow (&string_obstack, "\\n\\t", 4);
958 /* pass anything else through, but issue a warning. */
960 fprintf (stderr, "%s:%d: warning: unrecognized escape \\%c\n",
961 read_rtx_filename, read_rtx_lineno, c);
962 obstack_1grow (&string_obstack, '\\');
966 obstack_1grow (&string_obstack, c);
970 /* Read a double-quoted string onto the obstack. Caller has scanned
971 the leading quote. */
973 read_quoted_string (FILE *infile)
979 c = getc (infile); /* Read the string */
984 read_escape (infile);
990 obstack_1grow (&string_obstack, c);
993 obstack_1grow (&string_obstack, 0);
994 return (char *) obstack_finish (&string_obstack);
997 /* Read a braced string (a la Tcl) onto the string obstack. Caller
998 has scanned the leading brace. Note that unlike quoted strings,
999 the outermost braces _are_ included in the string constant. */
1001 read_braced_string (FILE *infile)
1004 int brace_depth = 1; /* caller-processed */
1005 unsigned long starting_read_rtx_lineno = read_rtx_lineno;
1007 obstack_1grow (&string_obstack, '{');
1010 c = getc (infile); /* Read the string */
1020 read_escape (infile);
1024 fatal_with_file_and_line
1025 (infile, "missing closing } for opening brace on line %lu",
1026 starting_read_rtx_lineno);
1028 obstack_1grow (&string_obstack, c);
1031 obstack_1grow (&string_obstack, 0);
1032 return (char *) obstack_finish (&string_obstack);
1035 /* Read some kind of string constant. This is the high-level routine
1036 used by read_rtx. It handles surrounding parentheses, leading star,
1037 and dispatch to the appropriate string constant reader. */
1040 read_string (FILE *infile, int star_if_braced)
1046 c = read_skip_spaces (infile);
1050 c = read_skip_spaces (infile);
1053 old_lineno = read_rtx_lineno;
1055 stringbuf = read_quoted_string (infile);
1059 obstack_1grow (&string_obstack, '*');
1060 stringbuf = read_braced_string (infile);
1063 fatal_with_file_and_line (infile, "expected `\"' or `{', found `%c'", c);
1067 c = read_skip_spaces (infile);
1069 fatal_expected_char (infile, ')', c);
1072 set_rtx_ptr_loc (stringbuf, read_rtx_filename, old_lineno);
1076 /* Provide a version of a function to read a long long if the system does
1078 #if HOST_BITS_PER_WIDE_INT > HOST_BITS_PER_LONG && !defined(HAVE_ATOLL) && !defined(HAVE_ATOQ)
1079 HOST_WIDE_INT atoll (const char *);
1082 atoll (const char *p)
1085 HOST_WIDE_INT tmp_wide;
1087 while (ISSPACE (*p))
1095 while (ISDIGIT (*p))
1097 HOST_WIDE_INT new_wide = tmp_wide*10 + (*p - '0');
1098 if (new_wide < tmp_wide)
1100 /* Return INT_MAX equiv on overflow. */
1101 tmp_wide = (~(unsigned HOST_WIDE_INT) 0) >> 1;
1104 tmp_wide = new_wide;
1109 tmp_wide = -tmp_wide;
1114 /* Given an object that starts with a char * name field, return a hash
1115 code for its name. */
1117 def_hash (const void *def)
1120 const char *string = *(const char *const *) def;
1122 for (result = i = 0; *string++ != '\0'; i++)
1123 result += ((unsigned char) *string << (i % CHAR_BIT));
1127 /* Given two objects that start with char * name fields, return true if
1128 they have the same name. */
1130 def_name_eq_p (const void *def1, const void *def2)
1132 return ! strcmp (*(const char *const *) def1,
1133 *(const char *const *) def2);
1136 /* INFILE is a FILE pointer to read text from. TMP_CHAR is a buffer suitable
1137 to read a name or number into. Process a define_constants directive,
1138 starting with the optional space after the "define_constants". */
1140 read_constants (FILE *infile, char *tmp_char)
1145 c = read_skip_spaces (infile);
1147 fatal_expected_char (infile, '[', c);
1148 defs = md_constants;
1150 defs = htab_create (32, def_hash, def_name_eq_p, (htab_del) 0);
1151 /* Disable constant expansion during definition processing. */
1153 while ( (c = read_skip_spaces (infile)) != ']')
1155 struct md_constant *def;
1159 fatal_expected_char (infile, '(', c);
1160 def = XNEW (struct md_constant);
1161 def->name = tmp_char;
1162 read_name (tmp_char, infile);
1163 entry_ptr = htab_find_slot (defs, def, INSERT);
1165 def->name = xstrdup (tmp_char);
1166 c = read_skip_spaces (infile);
1168 read_name (tmp_char, infile);
1171 def->value = xstrdup (tmp_char);
1176 def = (struct md_constant *) *entry_ptr;
1177 if (strcmp (def->value, tmp_char))
1178 fatal_with_file_and_line (infile,
1179 "redefinition of %s, was %s, now %s",
1180 def->name, def->value, tmp_char);
1182 c = read_skip_spaces (infile);
1184 fatal_expected_char (infile, ')', c);
1186 md_constants = defs;
1187 c = read_skip_spaces (infile);
1189 fatal_expected_char (infile, ')', c);
1192 /* For every constant definition, call CALLBACK with two arguments:
1193 a pointer a pointer to the constant definition and INFO.
1194 Stops when CALLBACK returns zero. */
1196 traverse_md_constants (htab_trav callback, void *info)
1199 htab_traverse (md_constants, callback, info);
1203 validate_const_int (FILE *infile, const char *string)
1209 while (*cp && ISSPACE (*cp))
1211 if (*cp == '-' || *cp == '+')
1216 if (! ISDIGIT (*cp))
1219 fatal_with_file_and_line (infile, "invalid decimal constant \"%s\"\n", string);
1222 /* Search GROUP for a mode or code called NAME and return its numerical
1223 identifier. INFILE is the file that contained NAME. */
1226 find_macro (struct macro_group *group, const char *name, FILE *infile)
1230 m = (struct mapping *) htab_find (group->macros, &name);
1232 return m->index + group->num_builtins;
1233 return group->find_builtin (name, infile);
1236 /* Finish reading a declaration of the form:
1238 (define... <name> [<value1> ... <valuen>])
1240 from INFILE, where each <valuei> is either a bare symbol name or a
1241 "(<name> <string>)" pair. The "(define..." part has already been read.
1243 Represent the declaration as a "mapping" structure; add it to TABLE
1244 (which belongs to GROUP) and return it. */
1246 static struct mapping *
1247 read_mapping (struct macro_group *group, htab_t table, FILE *infile)
1251 struct map_value **end_ptr;
1255 /* Read the mapping name and create a structure for it. */
1256 read_name (tmp_char, infile);
1257 m = add_mapping (group, table, tmp_char, infile);
1259 c = read_skip_spaces (infile);
1261 fatal_expected_char (infile, '[', c);
1263 /* Read each value. */
1264 end_ptr = &m->values;
1265 c = read_skip_spaces (infile);
1270 /* A bare symbol name that is implicitly paired to an
1273 read_name (tmp_char, infile);
1278 /* A "(name string)" pair. */
1279 read_name (tmp_char, infile);
1280 string = read_string (infile, false);
1281 c = read_skip_spaces (infile);
1283 fatal_expected_char (infile, ')', c);
1285 number = group->find_builtin (tmp_char, infile);
1286 end_ptr = add_map_value (end_ptr, number, string);
1287 c = read_skip_spaces (infile);
1291 c = read_skip_spaces (infile);
1293 fatal_expected_char (infile, ')', c);
1298 /* Check newly-created code macro MACRO to see whether every code has the
1299 same format. Initialize the macro's entry in bellwether_codes. */
1302 check_code_macro (struct mapping *macro, FILE *infile)
1304 struct map_value *v;
1305 enum rtx_code bellwether;
1307 bellwether = macro->values->number;
1308 for (v = macro->values->next; v != 0; v = v->next)
1309 if (strcmp (GET_RTX_FORMAT (bellwether), GET_RTX_FORMAT (v->number)) != 0)
1310 fatal_with_file_and_line (infile, "code macro `%s' combines "
1311 "different rtx formats", macro->name);
1313 bellwether_codes = XRESIZEVEC (enum rtx_code, bellwether_codes,
1315 bellwether_codes[macro->index] = bellwether;
1318 /* Read an rtx in printed representation from INFILE and store its
1319 core representation in *X. Also store the line number of the
1320 opening '(' in *LINENO. Return true on success or false if the
1321 end of file has been reached.
1323 read_rtx is not used in the compiler proper, but rather in
1324 the utilities gen*.c that construct C code from machine descriptions. */
1327 read_rtx (FILE *infile, rtx *x, int *lineno)
1329 static rtx queue_head, queue_next;
1330 static int queue_lineno;
1333 /* Do one-time initialization. */
1334 if (queue_head == 0)
1336 initialize_macros ();
1337 obstack_init (&string_obstack);
1338 queue_head = rtx_alloc (EXPR_LIST);
1339 ptr_locs = htab_create (161, leading_ptr_hash, leading_ptr_eq_p, 0);
1340 obstack_init (&ptr_loc_obstack);
1341 joined_conditions = htab_create (161, leading_ptr_hash,
1342 leading_ptr_eq_p, 0);
1343 obstack_init (&joined_conditions_obstack);
1346 if (queue_next == 0)
1348 struct map_value *mode_maps;
1349 struct macro_traverse_data mtd;
1351 c = read_skip_spaces (infile);
1356 queue_next = queue_head;
1357 queue_lineno = read_rtx_lineno;
1359 XEXP (queue_next, 0) = read_rtx_1 (infile, &mode_maps);
1360 XEXP (queue_next, 1) = 0;
1362 mtd.queue = queue_next;
1363 mtd.mode_maps = mode_maps;
1364 mtd.infile = infile;
1365 htab_traverse (modes.macros, apply_macro_traverse, &mtd);
1366 htab_traverse (codes.macros, apply_macro_traverse, &mtd);
1369 *x = XEXP (queue_next, 0);
1370 *lineno = queue_lineno;
1371 queue_next = XEXP (queue_next, 1);
1376 /* Subroutine of read_rtx that reads one construct from INFILE but
1377 doesn't apply any macros. */
1380 read_rtx_1 (FILE *infile, struct map_value **mode_maps)
1383 RTX_CODE real_code, bellwether_code;
1384 const char *format_ptr;
1385 /* tmp_char is a buffer used for reading decimal integers
1386 and names of rtx types and machine modes.
1387 Therefore, 256 must be enough. */
1392 HOST_WIDE_INT tmp_wide;
1394 /* Linked list structure for making RTXs: */
1397 struct rtx_list *next;
1398 rtx value; /* Value of this node. */
1402 c = read_skip_spaces (infile); /* Should be open paren. */
1404 fatal_expected_char (infile, '(', c);
1406 read_name (tmp_char, infile);
1407 if (strcmp (tmp_char, "nil") == 0)
1409 /* (nil) stands for an expression that isn't there. */
1410 c = read_skip_spaces (infile);
1412 fatal_expected_char (infile, ')', c);
1415 if (strcmp (tmp_char, "define_constants") == 0)
1417 read_constants (infile, tmp_char);
1420 if (strcmp (tmp_char, "define_mode_attr") == 0)
1422 read_mapping (&modes, modes.attrs, infile);
1425 if (strcmp (tmp_char, "define_mode_macro") == 0)
1427 read_mapping (&modes, modes.macros, infile);
1430 if (strcmp (tmp_char, "define_code_attr") == 0)
1432 read_mapping (&codes, codes.attrs, infile);
1435 if (strcmp (tmp_char, "define_code_macro") == 0)
1437 check_code_macro (read_mapping (&codes, codes.macros, infile), infile);
1440 real_code = find_macro (&codes, tmp_char, infile);
1441 bellwether_code = BELLWETHER_CODE (real_code);
1443 /* If we end up with an insn expression then we free this space below. */
1444 return_rtx = rtx_alloc (bellwether_code);
1445 format_ptr = GET_RTX_FORMAT (bellwether_code);
1446 PUT_CODE (return_rtx, real_code);
1448 /* If what follows is `: mode ', read it and
1449 store the mode in the rtx. */
1451 i = read_skip_spaces (infile);
1456 read_name (tmp_char, infile);
1457 if (tmp_char[0] != '<' || tmp_char[strlen (tmp_char) - 1] != '>')
1458 mode = find_macro (&modes, tmp_char, infile);
1460 mode = mode_attr_index (mode_maps, tmp_char, infile);
1461 PUT_MODE (return_rtx, mode);
1462 if (GET_MODE (return_rtx) != mode)
1463 fatal_with_file_and_line (infile, "mode too large");
1468 for (i = 0; format_ptr[i] != 0; i++)
1469 switch (format_ptr[i])
1471 /* 0 means a field for internal use only.
1472 Don't expect it to be present in the input. */
1478 XEXP (return_rtx, i) = read_rtx_1 (infile, mode_maps);
1482 /* 'V' is an optional vector: if a closeparen follows,
1483 just store NULL for this element. */
1484 c = read_skip_spaces (infile);
1488 XVEC (return_rtx, i) = 0;
1491 /* Now process the vector. */
1495 /* Obstack to store scratch vector in. */
1496 struct obstack vector_stack;
1497 int list_counter = 0;
1498 rtvec return_vec = NULL_RTVEC;
1500 c = read_skip_spaces (infile);
1502 fatal_expected_char (infile, '[', c);
1504 /* Add expressions to a list, while keeping a count. */
1505 obstack_init (&vector_stack);
1506 while ((c = read_skip_spaces (infile)) && c != ']')
1510 obstack_ptr_grow (&vector_stack, read_rtx_1 (infile, mode_maps));
1512 if (list_counter > 0)
1514 return_vec = rtvec_alloc (list_counter);
1515 memcpy (&return_vec->elem[0], obstack_finish (&vector_stack),
1516 list_counter * sizeof (rtx));
1518 else if (format_ptr[i] == 'E')
1519 fatal_with_file_and_line (infile,
1520 "vector must have at least one element");
1521 XVEC (return_rtx, i) = return_vec;
1522 obstack_free (&vector_stack, NULL);
1523 /* close bracket gotten */
1534 c = read_skip_spaces (infile);
1538 /* 'S' fields are optional and should be NULL if no string
1539 was given. Also allow normal 's' and 'T' strings to be
1540 omitted, treating them in the same way as empty strings. */
1541 XSTR (return_rtx, i) = (format_ptr[i] == 'S' ? NULL : "");
1545 /* The output template slot of a DEFINE_INSN,
1546 DEFINE_INSN_AND_SPLIT, or DEFINE_PEEPHOLE automatically
1547 gets a star inserted as its first character, if it is
1548 written with a brace block instead of a string constant. */
1549 star_if_braced = (format_ptr[i] == 'T');
1551 stringbuf = read_string (infile, star_if_braced);
1553 /* For insn patterns, we want to provide a default name
1554 based on the file and line, like "*foo.md:12", if the
1555 given name is blank. These are only for define_insn and
1556 define_insn_and_split, to aid debugging. */
1557 if (*stringbuf == '\0'
1559 && (GET_CODE (return_rtx) == DEFINE_INSN
1560 || GET_CODE (return_rtx) == DEFINE_INSN_AND_SPLIT))
1563 const char *fn = (read_rtx_filename ? read_rtx_filename : "rtx");
1565 for (slash = fn; *slash; slash ++)
1566 if (*slash == '/' || *slash == '\\' || *slash == ':')
1568 obstack_1grow (&string_obstack, '*');
1569 obstack_grow (&string_obstack, fn, strlen (fn));
1570 sprintf (line_name, ":%d", read_rtx_lineno);
1571 obstack_grow (&string_obstack, line_name, strlen (line_name)+1);
1572 stringbuf = (char *) obstack_finish (&string_obstack);
1576 XTMPL (return_rtx, i) = stringbuf;
1578 XSTR (return_rtx, i) = stringbuf;
1583 read_name (tmp_char, infile);
1584 validate_const_int (infile, tmp_char);
1585 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT
1586 tmp_wide = atoi (tmp_char);
1588 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
1589 tmp_wide = atol (tmp_char);
1591 /* Prefer atoll over atoq, since the former is in the ISO C99 standard.
1592 But prefer not to use our hand-rolled function above either. */
1593 #if defined(HAVE_ATOLL) || !defined(HAVE_ATOQ)
1594 tmp_wide = atoll (tmp_char);
1596 tmp_wide = atoq (tmp_char);
1600 XWINT (return_rtx, i) = tmp_wide;
1605 read_name (tmp_char, infile);
1606 validate_const_int (infile, tmp_char);
1607 tmp_int = atoi (tmp_char);
1608 XINT (return_rtx, i) = tmp_int;
1615 c = read_skip_spaces (infile);
1617 fatal_expected_char (infile, ')', c);