1 /*-------------------------------------------------------------------------
2 SDCCsymt.c - Code file for Symbols table related structures and MACRO's.
3 Written By - Sandeep Dutta . sandeep.dutta@usa.net (1998)
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published by the
7 Free Software Foundation; either version 2, or (at your option) any
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 In other words, you are welcome to use, share and improve this program.
20 You are forbidden to forbid anyone else to use, share and improve
21 what you give them. Help stamp out software-hoarding!
22 -------------------------------------------------------------------------*/
29 value *aggregateToPointer (value *val);
30 void printTypeChainRaw (sym_link * start, FILE * of);
32 void printFromToType(sym_link *from, sym_link *to) {
33 fprintf (stderr, "from type '");
34 printTypeChain (from, stderr);
35 fprintf (stderr, "'\nto type '");
36 printTypeChain (to, stderr);
37 fprintf (stderr, "'\n");
41 char *nounName(sym_link *sl) {
42 switch (SPEC_NOUN(sl))
45 if (SPEC_LONG(sl)) return "long";
46 if (sl->select.s._short) return "short";
49 case V_FLOAT: return "float";
50 case V_CHAR: return "char";
51 case V_VOID: return "void";
52 case V_STRUCT: return "struct";
53 case V_LABEL: return "label";
54 case V_BITFIELD: return "bitfield";
55 case V_BIT: return "bit";
56 case V_SBIT: return "sbit";
57 case V_DOUBLE: return "double";
62 bucket *SymbolTab[256]; /* the symbol table */
63 bucket *StructTab[256]; /* the structure table */
64 bucket *TypedefTab[256]; /* the typedef table */
65 bucket *LabelTab[256]; /* the Label table */
66 bucket *enumTab[256]; /* enumerated table */
68 /*------------------------------------------------------------------*/
69 /* initSymt () - initialises symbol table related stuff */
70 /*------------------------------------------------------------------*/
76 for (i = 0; i < 256; i++)
77 SymbolTab[i] = StructTab[i] = (void *) NULL;
81 /*-----------------------------------------------------------------*/
82 /* newBucket - allocates & returns a new bucket */
83 /*-----------------------------------------------------------------*/
89 bp = Safe_alloc ( sizeof (bucket));
94 /*-----------------------------------------------------------------*/
95 /* hashKey - computes the hashkey given a symbol name */
96 /*-----------------------------------------------------------------*/
98 hashKey (const char *s)
100 unsigned long key = 0;
107 /*-----------------------------------------------------------------*/
108 /* addSym - adds a symbol to the hash Table */
109 /*-----------------------------------------------------------------*/
111 addSym (bucket ** stab,
118 int i; /* index into the hash Table */
119 bucket *bp; /* temp bucket * */
122 symbol *csym = (symbol *)sym;
124 if (getenv("DEBUG_SANITY")) {
125 fprintf (stderr, "addSym: %s ", sname);
127 /* make sure the type is complete and sane */
128 checkTypeSanity(csym->etype, csym->name);
131 /* prevent overflow of the (r)name buffers */
132 if (strlen(sname)>SDCC_SYMNAME_MAX) {
133 werror (W_SYMBOL_NAME_TOO_LONG, SDCC_SYMNAME_MAX);
134 sname[SDCC_SYMNAME_MAX]='\0';
137 /* the symbols are always added at the head of the list */
139 /* get a free entry */
140 bp = Safe_alloc ( sizeof (bucket));
142 bp->sym = sym; /* update the symbol pointer */
143 bp->level = level; /* update the nest level */
145 strncpyz (bp->name, sname, sizeof(bp->name)); /* copy the name into place */
147 /* if this is the first entry */
150 bp->prev = bp->next = (void *) NULL; /* point to nothing */
153 /* not first entry then add @ head of list */
163 /*-----------------------------------------------------------------*/
164 /* deleteSym - deletes a symbol from the hash Table entry */
165 /*-----------------------------------------------------------------*/
167 deleteSym (bucket ** stab, void *sym, char *sname)
175 /* find the symbol */
178 if (bp->sym == sym) /* found it then break out */
179 break; /* of the loop */
183 if (!bp) /* did not find it */
185 /* if this is the first one in the chain */
189 if (stab[i]) /* if chain ! empty */
190 stab[i]->prev = (void *) NULL;
192 /* middle || end of chain */
195 if (bp->next) /* if not end of chain */
196 bp->next->prev = bp->prev;
198 bp->prev->next = bp->next;
203 /*-----------------------------------------------------------------*/
204 /* findSym - finds a symbol in a table */
205 /*-----------------------------------------------------------------*/
207 findSym (bucket ** stab, void *sym, const char *sname)
211 bp = stab[hashKey (sname)];
214 if (bp->sym == sym || strcmp (bp->name, sname) == 0)
219 return (bp ? bp->sym : (void *) NULL);
222 /*-----------------------------------------------------------------*/
223 /* findSymWithLevel - finds a symbol with a name & level */
224 /*-----------------------------------------------------------------*/
226 findSymWithLevel (bucket ** stab, symbol * sym)
230 bp = stab[hashKey (sym->name)];
233 ** do the search from the head of the list since the
234 ** elements are added at the head it is ensured that
235 ** we will find the deeper definitions before we find
236 ** the global ones. we need to check for symbols with
237 ** level <= to the level given, if levels match then block
238 ** numbers need to match as well
242 if (strcmp (bp->name, sym->name) == 0 && bp->level <= sym->level)
244 /* if this is parameter then nothing else need to be checked */
245 if (((symbol *) (bp->sym))->_isparm)
247 /* if levels match then block numbers should also match */
248 if (bp->level && bp->level == sym->level && bp->block == sym->block)
250 /* if levels don't match then we are okay */
251 if (bp->level && bp->level != sym->level && bp->block <= sym->block)
253 /* if this is a global variable then we are ok too */
261 return (void *) NULL;
264 /*-----------------------------------------------------------------*/
265 /* findSymWithBlock - finds a symbol with name in with a block */
266 /*-----------------------------------------------------------------*/
268 findSymWithBlock (bucket ** stab, symbol * sym, int block)
272 bp = stab[hashKey (sym->name)];
275 if (strcmp (bp->name, sym->name) == 0 &&
281 return (bp ? bp->sym : (void *) NULL);
284 /*------------------------------------------------------------------*/
285 /* newSymbol () - returns a new pointer to a symbol */
286 /*------------------------------------------------------------------*/
288 newSymbol (char *name, int scope)
292 sym = Safe_alloc ( sizeof (symbol));
294 strncpyz (sym->name, name, sizeof(sym->name)); /* copy the name */
295 sym->level = scope; /* set the level */
296 sym->block = currBlockno;
297 sym->lineDef = mylineno; /* set the line number */
298 sym->fileDef = currFname;
302 /*------------------------------------------------------------------*/
303 /* newLink - creates a new link (declarator,specifier) */
304 /*------------------------------------------------------------------*/
306 newLink (SYM_LINK_CLASS select)
310 p = Safe_alloc ( sizeof (sym_link));
316 /*------------------------------------------------------------------*/
317 /* newStruct - creats a new structdef from the free list */
318 /*------------------------------------------------------------------*/
320 newStruct (char *tag)
324 s = Safe_alloc ( sizeof (structdef));
326 strncpyz (s->tag, tag, sizeof(s->tag)); /* copy the tag */
330 /*------------------------------------------------------------------*/
331 /* sclsFromPtr - Return the storage class a pointer points into. */
332 /* S_FIXED is returned for generic pointers or other */
333 /* unexpected cases */
334 /*------------------------------------------------------------------*/
336 sclsFromPtr(sym_link *ptr)
338 switch (DCL_TYPE (ptr))
361 /*------------------------------------------------------------------*/
362 /* pointerTypes - do the computation for the pointer types */
363 /*------------------------------------------------------------------*/
365 pointerTypes (sym_link * ptr, sym_link * type)
370 /* find the first pointer type */
371 while (ptr && !IS_PTR (ptr))
374 /* could not find it */
375 if (!ptr || IS_SPEC (ptr))
378 if (IS_PTR(ptr) && DCL_TYPE(ptr)!=UPOINTER) {
379 pointerTypes (ptr->next, type);
383 /* change the pointer type depending on the
384 storage class of the type */
387 switch (SPEC_SCLS (type))
390 DCL_TYPE (ptr) = FPOINTER;
393 DCL_TYPE (ptr) = IPOINTER;
396 DCL_TYPE (ptr) = PPOINTER;
399 DCL_TYPE (ptr) = POINTER;
402 DCL_TYPE (ptr) = CPOINTER;
405 DCL_TYPE (ptr) = EEPPOINTER;
408 DCL_TYPE (ptr) = port->unqualified_pointer;
411 /* the storage class of type ends here */
412 SPEC_SCLS (type) = 0;
415 /* now change all the remaining unknown pointers
416 to generic pointers */
419 if (!IS_SPEC (ptr) && DCL_TYPE (ptr) == UPOINTER)
420 DCL_TYPE (ptr) = port->unqualified_pointer;
424 /* same for the type although it is highly unlikely that
425 type will have a pointer */
428 if (!IS_SPEC (type) && DCL_TYPE (type) == UPOINTER)
429 DCL_TYPE (type) = port->unqualified_pointer;
434 /*------------------------------------------------------------------*/
435 /* addDecl - adds a declarator @ the end of a chain */
436 /*------------------------------------------------------------------*/
438 addDecl (symbol * sym, int type, sym_link * p)
444 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
445 fprintf (stderr, "SDCCsymt.c:addDecl(%s,%d,%p)\n", sym->name, type, p);
447 /* if we are passed a link then set head & tail */
456 head = tail = newLink (DECLARATOR);
457 DCL_TYPE (head) = type;
460 /* if this is the first entry */
468 if (IS_SPEC (sym->etype) && IS_SPEC (head) && head == tail)
470 sym->etype = mergeSpec (sym->etype, head, sym->name);
474 if (IS_SPEC (sym->etype) && !IS_SPEC (head) && head == tail)
477 while (t->next != sym->etype)
480 tail->next = sym->etype;
484 sym->etype->next = head;
490 /* if the type is an unknown pointer and has
491 a tspec then take the storage class const & volatile
492 attribute from the tspec & make it those of this
496 //DCL_TYPE (p) == UPOINTER &&
499 if (!IS_SPEC (sym->etype))
501 sym->etype = sym->etype->next = newLink (SPECIFIER);
503 SPEC_SCLS (sym->etype) = SPEC_SCLS (DCL_TSPEC (p));
504 DCL_TSPEC (p) = NULL;
507 // if there is a function in this type chain
508 if (p && funcInChain(sym->type)) {
509 processFuncArgs (sym);
515 /*------------------------------------------------------------------
516 checkTypeSanity: prevent the user from doing e.g.:
518 ------------------------------------------------------------------*/
519 void checkTypeSanity(sym_link *etype, char *name) {
523 if (getenv("DEBUG_SANITY")) {
524 fprintf (stderr, "sanity check skipped for %s (etype==0)\n", name);
529 if (!IS_SPEC(etype)) {
530 if (getenv("DEBUG_SANITY")) {
531 fprintf (stderr, "sanity check skipped for %s (!IS_SPEC)\n", name);
536 noun=nounName(etype);
538 if (getenv("DEBUG_SANITY")) {
539 fprintf (stderr, "checking sanity for %s %p\n", name, etype);
542 if ((SPEC_NOUN(etype)==V_CHAR ||
543 SPEC_NOUN(etype)==V_FLOAT ||
544 SPEC_NOUN(etype)==V_DOUBLE ||
545 SPEC_NOUN(etype)==V_VOID) &&
546 (etype->select.s._short || SPEC_LONG(etype))) {
547 // long or short for char float double or void
548 werror (E_LONG_OR_SHORT_INVALID, noun, name);
550 if ((SPEC_NOUN(etype)==V_FLOAT ||
551 SPEC_NOUN(etype)==V_DOUBLE ||
552 SPEC_NOUN(etype)==V_VOID) &&
553 (etype->select.s._signed || SPEC_USIGN(etype))) {
554 // signed or unsigned for float double or void
555 werror (E_SIGNED_OR_UNSIGNED_INVALID, noun, name);
558 // special case for "short"
559 if (etype->select.s._short) {
560 SPEC_NOUN(etype) = options.shortis8bits ? V_CHAR : V_INT;
561 etype->select.s._short = 0;
565 "const a;" or "data b;" or "signed s" or "long l"
567 if (!SPEC_NOUN(etype)) {
568 SPEC_NOUN(etype)=V_INT;
571 /* ISO/IEC 9899 J.3.9 implementation defined behaviour: */
572 /* a "plain" int bitfield is unsigned */
573 if (SPEC_NOUN(etype)==V_BIT ||
574 SPEC_NOUN(etype)==V_SBIT) {
575 if (!etype->select.s._signed)
576 SPEC_USIGN(etype) = 1;
579 if (etype->select.s._signed && SPEC_USIGN(etype)) {
580 // signed AND unsigned
581 werror (E_SIGNED_AND_UNSIGNED_INVALID, noun, name);
583 if (etype->select.s._short && SPEC_LONG(etype)) {
585 werror (E_LONG_AND_SHORT_INVALID, noun, name);
590 /*------------------------------------------------------------------*/
591 /* mergeSpec - merges two specifiers and returns the new one */
592 /*------------------------------------------------------------------*/
594 mergeSpec (sym_link * dest, sym_link * src, char *name)
596 if (!IS_SPEC(dest) || !IS_SPEC(src)) {
598 werror (E_INTERNAL_ERROR, __FILE__, __LINE__, "cannot merge declarator");
601 werror (E_SYNTAX_ERROR, yytext);
602 // the show must go on
607 if (SPEC_NOUN(src)) {
608 if (!SPEC_NOUN(dest)) {
609 SPEC_NOUN(dest)=SPEC_NOUN(src);
611 /* we shouldn't redeclare the type */
612 if (getenv("DEBUG_SANITY")) {
613 fprintf (stderr, "mergeSpec: ");
615 werror(E_TWO_OR_MORE_DATA_TYPES, name);
619 if (SPEC_SCLS(src)) {
620 /* if destination has no storage class */
621 if (!SPEC_SCLS (dest) || SPEC_SCLS(dest)==S_REGISTER) {
622 SPEC_SCLS (dest) = SPEC_SCLS (src);
624 if (getenv("DEBUG_SANITY")) {
625 fprintf (stderr, "mergeSpec: ");
627 werror(E_TWO_OR_MORE_STORAGE_CLASSES, name);
631 /* copy all the specifications */
633 // we really should do:
635 if (SPEC_what(src)) {
636 if (SPEC_what(dest)) {
637 werror(W_DUPLICATE_SPEC, "what");
639 SPEC_what(dst)|=SPEC_what(src);
642 // but there are more important thing right now
644 SPEC_LONG (dest) |= SPEC_LONG (src);
645 dest->select.s._short|=src->select.s._short;
646 SPEC_USIGN (dest) |= SPEC_USIGN (src);
647 dest->select.s._signed|=src->select.s._signed;
648 SPEC_STAT (dest) |= SPEC_STAT (src);
649 SPEC_EXTR (dest) |= SPEC_EXTR (src);
650 SPEC_CONST(dest) |= SPEC_CONST (src);
651 SPEC_ABSA (dest) |= SPEC_ABSA (src);
652 SPEC_VOLATILE (dest) |= SPEC_VOLATILE (src);
653 SPEC_ADDR (dest) |= SPEC_ADDR (src);
654 SPEC_OCLS (dest) = SPEC_OCLS (src);
655 SPEC_BLEN (dest) |= SPEC_BLEN (src);
656 SPEC_BSTR (dest) |= SPEC_BSTR (src);
657 SPEC_TYPEDEF (dest) |= SPEC_TYPEDEF (src);
658 SPEC_ENUM (dest) |= SPEC_ENUM (src);
659 if (SPEC_ARGREG(src) && !SPEC_ARGREG(dest))
660 SPEC_ARGREG(dest) = SPEC_ARGREG(src);
662 if (IS_STRUCT (dest) && SPEC_STRUCT (dest) == NULL)
663 SPEC_STRUCT (dest) = SPEC_STRUCT (src);
665 /* these are the only function attributes that will be set
666 in a specifier while parsing */
667 FUNC_NONBANKED(dest) |= FUNC_NONBANKED(src);
668 FUNC_BANKED(dest) |= FUNC_BANKED(src);
669 FUNC_ISCRITICAL(dest) |= FUNC_ISCRITICAL(src);
670 FUNC_ISREENT(dest) |= FUNC_ISREENT(src);
671 FUNC_ISNAKED(dest) |= FUNC_ISNAKED(src);
672 FUNC_ISISR(dest) |= FUNC_ISISR(src);
673 FUNC_ISJAVANATIVE(dest) |= FUNC_ISJAVANATIVE(src);
674 FUNC_ISBUILTIN(dest) |= FUNC_ISBUILTIN(src);
675 FUNC_ISOVERLAY(dest) |= FUNC_ISOVERLAY(src);
676 FUNC_INTNO(dest) |= FUNC_INTNO(src);
677 FUNC_REGBANK(dest) |= FUNC_REGBANK(src);
682 /*------------------------------------------------------------------*/
683 /* genSymName - generates and returns a name used for anonymous vars */
684 /*------------------------------------------------------------------*/
686 genSymName (int level)
688 static int gCount = 0;
689 static char gname[SDCC_NAME_MAX + 1];
691 SNPRINTF (gname, sizeof(gname), "__%04d%04d", level, gCount++);
695 /*------------------------------------------------------------------*/
696 /* getSpec - returns the specifier part from a declaration chain */
697 /*------------------------------------------------------------------*/
699 getSpec (sym_link * p)
704 while (p && !(IS_SPEC (p)))
710 /*------------------------------------------------------------------*/
711 /* newCharLink() - creates an char type */
712 /*------------------------------------------------------------------*/
718 p = newLink (SPECIFIER);
719 SPEC_NOUN (p) = V_CHAR;
724 /*------------------------------------------------------------------*/
725 /* newFloatLink - a new Float type */
726 /*------------------------------------------------------------------*/
732 p = newLink (SPECIFIER);
733 SPEC_NOUN (p) = V_FLOAT;
738 /*------------------------------------------------------------------*/
739 /* newLongLink() - new long type */
740 /*------------------------------------------------------------------*/
746 p = newLink (SPECIFIER);
747 SPEC_NOUN (p) = V_INT;
753 /*------------------------------------------------------------------*/
754 /* newIntLink() - creates an int type */
755 /*------------------------------------------------------------------*/
761 p = newLink (SPECIFIER);
762 SPEC_NOUN (p) = V_INT;
767 /*------------------------------------------------------------------*/
768 /* getSize - returns size of a type chain in bits */
769 /*------------------------------------------------------------------*/
771 getSize (sym_link * p)
773 /* if nothing return 0 */
777 { /* if this is the specifier then */
778 switch (SPEC_NOUN (p))
779 { /* depending on the specifier type */
781 return (IS_LONG (p) ? LONGSIZE : INTSIZE);
789 return SPEC_STRUCT (p)->size;
796 return ((SPEC_BLEN (p) / 8) + (SPEC_BLEN (p) % 8 ? 1 : 0));
802 /* this is a declarator */
803 switch (DCL_TYPE (p))
807 return DCL_ELEM (p) * getSize (p->next);
809 // werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
810 // "can not tell the size of an array[]");
830 /*---------------------------------------------------------------------*/
831 /* getAllocSize - returns size of a type chain in bytes for allocation */
832 /*---------------------------------------------------------------------*/
834 getAllocSize (sym_link *p)
836 if (IS_STRUCT (p) && SPEC_STRUCT (p)->type == STRUCT)
838 /* if this is a struct specifier then */
839 /* calculate the size as it could end */
840 /* with an array of unspecified length */
841 symbol *sflds = SPEC_STRUCT (p)->fields;
843 while (sflds && sflds->next)
846 if (sflds && !IS_BITFIELD (sflds->type))
847 return sflds->offset + getAllocSize (sflds->type);
849 return SPEC_STRUCT (p)->size;
855 /*------------------------------------------------------------------*/
856 /* bitsForType - returns # of bits required to store this type */
857 /*------------------------------------------------------------------*/
859 bitsForType (sym_link * p)
861 /* if nothing return 0 */
866 { /* if this is the specifier then */
868 switch (SPEC_NOUN (p))
869 { /* depending on the specifier type */
871 return (IS_LONG (p) ? LONGSIZE * 8 : INTSIZE * 8);
873 return FLOATSIZE * 8;
879 return SPEC_STRUCT (p)->size * 8;
886 return SPEC_BLEN (p);
892 /* this is a specifier */
893 switch (DCL_TYPE (p))
896 return DCL_ELEM (p) * getSize (p->next) * 8;
900 return (PTRSIZE * 8);
905 return (FPTRSIZE * 8);
907 return (GPTRSIZE * 8);
914 /*------------------------------------------------------------------*/
915 /* copySymbolChain - copies a symbol chain */
916 /*------------------------------------------------------------------*/
918 copySymbolChain (symbol * src)
925 dest = copySymbol (src);
926 dest->next = copySymbolChain (src->next);
930 /*------------------------------------------------------------------*/
931 /* copySymbol - makes a copy of a symbol */
932 /*------------------------------------------------------------------*/
934 copySymbol (symbol * src)
941 dest = newSymbol (src->name, src->level);
942 memcpy (dest, src, sizeof (symbol));
943 dest->level = src->level;
944 dest->block = src->block;
945 dest->ival = copyIlist (src->ival);
946 dest->type = copyLinkChain (src->type);
947 dest->etype = getSpec (dest->type);
949 dest->key = src->key;
950 dest->allocreq = src->allocreq;
954 /*------------------------------------------------------------------*/
955 /* reverseSyms - reverses the links for a symbol chain */
956 /*------------------------------------------------------------------*/
958 reverseSyms (symbol * sym)
960 symbol *prev, *curr, *next;
975 sym->next = (void *) NULL;
979 /*------------------------------------------------------------------*/
980 /* reverseLink - reverses the links for a type chain */
981 /*------------------------------------------------------------------*/
983 reverseLink (sym_link * type)
985 sym_link *prev, *curr, *next;
1000 type->next = (void *) NULL;
1004 /*------------------------------------------------------------------*/
1005 /* addSymChain - adds a symbol chain to the symboltable */
1006 /*------------------------------------------------------------------*/
1008 addSymChain (symbol * symHead)
1010 symbol *sym = symHead;
1011 symbol *csym = NULL;
1014 for (; sym != NULL; sym = sym->next)
1017 checkTypeSanity(sym->etype, sym->name);
1019 if (!sym->level && !(IS_SPEC(sym->etype) && IS_TYPEDEF(sym->etype)))
1022 /* if already exists in the symbol table then check if
1023 one of them is an extern definition if yes then
1024 then check if the type match, if the types match then
1025 delete the current entry and add the new entry */
1026 if ((csym = findSymWithLevel (SymbolTab, sym)) &&
1027 csym->level == sym->level) {
1029 /* If the previous definition was for an array with incomplete */
1030 /* type, and the new definition has completed the type, update */
1031 /* the original type to match */
1032 if (IS_DECL(csym->type) && DCL_TYPE(csym->type)==ARRAY
1033 && IS_DECL(sym->type) && DCL_TYPE(sym->type)==ARRAY)
1035 if (!DCL_ELEM(csym->type) && DCL_ELEM(sym->type))
1036 DCL_ELEM(csym->type) = DCL_ELEM(sym->type);
1040 /* If only one of the definitions used the "at" keyword, copy */
1041 /* the address to the other. */
1042 if (IS_SPEC(csym->etype) && SPEC_ABSA(csym->etype)
1043 && IS_SPEC(sym->etype) && !SPEC_ABSA(sym->etype))
1045 SPEC_ABSA (sym->etype) = 1;
1046 SPEC_ADDR (sym->etype) = SPEC_ADDR (csym->etype);
1048 if (IS_SPEC(csym->etype) && !SPEC_ABSA(csym->etype)
1049 && IS_SPEC(sym->etype) && SPEC_ABSA(sym->etype))
1051 SPEC_ABSA (csym->etype) = 1;
1052 SPEC_ADDR (csym->etype) = SPEC_ADDR (sym->etype);
1057 if (csym->ival && sym->ival)
1059 if (compareTypeExact (csym->type, sym->type, sym->level) != 1)
1063 /* one definition extern ? */
1064 if (IS_EXTERN (csym->etype) || IS_EXTERN (sym->etype))
1065 werror (E_EXTERN_MISMATCH, sym->name);
1067 werror (E_DUPLICATE, sym->name);
1068 werrorfl (csym->fileDef, csym->lineDef, E_PREVIOUS_DEF);
1070 fprintf (stderr, "from type '");
1071 printTypeChain (csym->type, stderr);
1072 if (IS_SPEC (csym->etype) && SPEC_ABSA (csym->etype))
1073 fprintf(stderr, " at 0x%x", SPEC_ADDR (csym->etype));
1074 fprintf (stderr, "'\nto type '");
1075 printTypeChain (sym->type, stderr);
1076 if (IS_SPEC (sym->etype) && SPEC_ABSA (sym->etype))
1077 fprintf(stderr, " at 0x%x", SPEC_ADDR (sym->etype));
1078 fprintf (stderr, "'\n");
1083 if (csym->ival && !sym->ival)
1084 sym->ival = csym->ival;
1086 /* delete current entry */
1087 deleteSym (SymbolTab, csym, csym->name);
1088 deleteFromSeg(csym);
1092 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
1097 /*------------------------------------------------------------------*/
1098 /* funcInChain - DCL Type 'FUNCTION' found in type chain */
1099 /*------------------------------------------------------------------*/
1101 funcInChain (sym_link * lnk)
1112 /*------------------------------------------------------------------*/
1113 /* structElemType - returns the type info of a struct member */
1114 /*------------------------------------------------------------------*/
1116 structElemType (sym_link * stype, value * id)
1118 symbol *fields = (SPEC_STRUCT (stype) ? SPEC_STRUCT (stype)->fields : NULL);
1119 sym_link *type, *etype;
1120 sym_link *petype = getSpec (stype);
1124 /* look for the id */
1127 if (strcmp (fields->rname, id->name) == 0)
1129 type = copyLinkChain (fields->type);
1130 etype = getSpec (type);
1131 SPEC_SCLS (etype) = (SPEC_SCLS (petype) == S_REGISTER ?
1132 SPEC_SCLS (etype) : SPEC_SCLS (petype));
1134 SPEC_CONST (type) |= SPEC_CONST (stype);
1136 DCL_PTR_CONST (type) |= SPEC_CONST (stype);
1139 fields = fields->next;
1143 werror (E_NOT_MEMBER, id->name);
1145 // the show must go on
1146 return newIntLink();
1149 /*------------------------------------------------------------------*/
1150 /* getStructElement - returns element of a tructure definition */
1151 /*------------------------------------------------------------------*/
1153 getStructElement (structdef * sdef, symbol * sym)
1157 for (field = sdef->fields; field; field = field->next)
1158 if (strcmp (field->name, sym->name) == 0)
1161 werror (E_NOT_MEMBER, sym->name);
1163 return sdef->fields;
1166 /*------------------------------------------------------------------*/
1167 /* compStructSize - computes the size of a structure */
1168 /*------------------------------------------------------------------*/
1170 compStructSize (int su, structdef * sdef)
1172 int sum = 0, usum = 0;
1176 /* for the identifiers */
1177 loop = sdef->fields;
1180 /* create the internal name for this variable */
1181 SNPRINTF (loop->rname, sizeof(loop->rname), "_%s", loop->name);
1186 SPEC_VOLATILE (loop->etype) |= (su == UNION ? 1 : 0);
1188 /* if this is a bit field */
1191 /* change it to a unsigned bit */
1192 SPEC_NOUN (loop->etype) = V_BITFIELD;
1193 SPEC_USIGN (loop->etype) = 1;
1194 SPEC_BLEN (loop->etype) = loop->bitVar;
1196 if (loop->bitVar == BITVAR_PAD) {
1197 /* A zero length bitfield forces padding */
1198 SPEC_BSTR (loop->etype) = bitOffset;
1199 SPEC_BLEN (loop->etype) = 0;
1204 if (bitOffset == 8) {
1208 /* check if this fit into the remaining */
1209 /* bits of this byte else align it to the */
1210 /* next byte boundary */
1211 if (loop->bitVar <= (8 - bitOffset)) {
1212 /* fits into current byte */
1214 SPEC_BSTR (loop->etype) = bitOffset;
1215 bitOffset += loop->bitVar;
1217 else if (!bitOffset) {
1218 /* does not fit, but is already byte aligned */
1220 SPEC_BSTR (loop->etype) = bitOffset;
1221 bitOffset += loop->bitVar;
1224 /* does not fit; need to realign first */
1226 loop->offset = (su == UNION ? sum = 0 : sum);
1228 SPEC_BSTR (loop->etype) = bitOffset;
1229 bitOffset += loop->bitVar;
1231 while (bitOffset>8) {
1238 /* This is a non-bit field. Make sure we are */
1239 /* byte aligned first */
1242 loop->offset = (su == UNION ? sum = 0 : sum);
1246 checkDecl (loop, 1);
1247 sum += getSize (loop->type);
1252 /* if union then size = sizeof larget field */
1254 /* For UNION, round up after each field */
1255 sum += ((bitOffset+7)/8);
1256 usum = max (usum, sum);
1261 /* For STRUCT, round up after all fields processed */
1263 sum += ((bitOffset+7)/8);
1265 return (su == UNION ? usum : sum);
1268 /*-------------------------------------------------------------------*/
1269 /* promoteAnonStructs - promote anonymous struct/union's fields into */
1270 /* an enclosing struct/union */
1271 /*-------------------------------------------------------------------*/
1273 promoteAnonStructs (int su, structdef * sdef)
1282 tofield = &sdef->fields;
1283 field = sdef->fields;
1286 nextfield = field->next;
1287 if (!*field->name && IS_STRUCT (field->type))
1289 /* Found an anonymous struct/union. Replace it */
1290 /* with the fields it contains and adjust all */
1293 base = field->offset;
1294 subfield = copySymbolChain (SPEC_STRUCT (field->type)->fields);
1296 continue; /* just in case it's empty */
1298 *tofield = subfield;
1301 /* check for field name conflicts resulting from promotion */
1302 dupfield = sdef->fields;
1303 while (dupfield && dupfield != subfield)
1305 if (*subfield->name && !strcmp (dupfield->name, subfield->name))
1307 werrorfl (subfield->fileDef, subfield->lineDef,
1309 su==STRUCT ? "struct" : "union",
1311 werrorfl (dupfield->fileDef, dupfield->lineDef,
1314 dupfield = dupfield->next;
1317 subfield->offset += base;
1319 subfield = subfield->next;
1323 subfield->next = nextfield;
1324 tofield = &subfield->next;
1327 tofield = &field->next;
1333 /*------------------------------------------------------------------*/
1334 /* checkSClass - check the storage class specification */
1335 /*------------------------------------------------------------------*/
1337 checkSClass (symbol * sym, int isProto)
1341 if (getenv("DEBUG_SANITY")) {
1342 fprintf (stderr, "checkSClass: %s \n", sym->name);
1345 /* type is literal can happen for enums change
1347 if (SPEC_SCLS (sym->etype) == S_LITERAL && !SPEC_ENUM (sym->etype))
1348 SPEC_SCLS (sym->etype) = S_AUTO;
1350 /* if sfr or sbit then must also be volatile */
1351 if (SPEC_SCLS (sym->etype) == S_SBIT ||
1352 SPEC_SCLS (sym->etype) == S_SFR)
1354 SPEC_VOLATILE (sym->etype) = 1;
1357 /* if absolute address given then it mark it as
1358 volatile -- except in the PIC port */
1360 #if !OPT_DISABLE_PIC || !OPT_DISABLE_PIC16
1361 /* The PIC port uses a different peep hole optimizer based on "pCode" */
1362 if (!TARGET_IS_PIC && !TARGET_IS_PIC16)
1365 if (IS_ABSOLUTE (sym->etype))
1366 SPEC_VOLATILE (sym->etype) = 1;
1368 /* If code memory is read only, then pointers to code memory */
1369 /* implicitly point to constants -- make this explicit */
1371 while (t && t->next) {
1372 if (IS_CODEPTR(t) && port->mem.code_ro) {
1373 if (IS_SPEC(t->next)) {
1374 SPEC_CONST (t->next) = 1;
1376 DCL_PTR_CONST (t->next) = 1;
1382 /* global variables declared const put into code */
1383 /* if no other storage class specified */
1384 if (sym->level == 0 &&
1385 SPEC_SCLS(sym->etype) == S_FIXED &&
1386 !IS_FUNC(sym->type)) {
1387 /* find the first non-array link */
1391 if (IS_CONSTANT (t)) {
1392 SPEC_SCLS (sym->etype) = S_CODE;
1396 /* global variable in code space is a constant */
1397 if (sym->level == 0 &&
1398 SPEC_SCLS (sym->etype) == S_CODE &&
1399 port->mem.code_ro) {
1400 /* find the first non-array link */
1407 DCL_PTR_CONST (t) = 1;
1411 /* if bit variable then no storage class can be */
1412 /* specified since bit is already a storage */
1413 if (IS_BITVAR (sym->etype) &&
1414 (SPEC_SCLS (sym->etype) != S_FIXED &&
1415 SPEC_SCLS (sym->etype) != S_SBIT &&
1416 SPEC_SCLS (sym->etype) != S_BIT)
1419 werror (E_BITVAR_STORAGE, sym->name);
1420 SPEC_SCLS (sym->etype) = S_FIXED;
1423 /* extern variables cannot be initialized */
1424 if (IS_EXTERN (sym->etype) && sym->ival)
1426 werror (E_EXTERN_INIT, sym->name);
1430 /* if this is an automatic symbol */
1431 if (sym->level && (options.stackAuto || reentrant)) {
1432 if ((SPEC_SCLS (sym->etype) == S_AUTO ||
1433 SPEC_SCLS (sym->etype) == S_FIXED ||
1434 SPEC_SCLS (sym->etype) == S_REGISTER ||
1435 SPEC_SCLS (sym->etype) == S_STACK ||
1436 SPEC_SCLS (sym->etype) == S_XSTACK)) {
1437 SPEC_SCLS (sym->etype) = S_AUTO;
1439 /* storage class may only be specified for statics */
1440 if (!IS_STATIC(sym->etype)) {
1441 werror (E_AUTO_ASSUMED, sym->name);
1446 /* automatic symbols cannot be given */
1447 /* an absolute address ignore it */
1449 SPEC_ABSA (sym->etype) &&
1450 (options.stackAuto || reentrant))
1452 werror (E_AUTO_ABSA, sym->name);
1453 SPEC_ABSA (sym->etype) = 0;
1456 /* arrays & pointers cannot be defined for bits */
1457 /* SBITS or SFRs or BIT */
1458 if ((IS_ARRAY (sym->type) || IS_PTR (sym->type)) &&
1459 (SPEC_NOUN (sym->etype) == V_BIT ||
1460 SPEC_NOUN (sym->etype) == V_SBIT ||
1461 SPEC_NOUN (sym->etype) == V_BITFIELD ||
1462 SPEC_SCLS (sym->etype) == S_SFR))
1463 werror (E_BIT_ARRAY, sym->name);
1465 /* if this is a bit|sbit then set length & start */
1466 if (SPEC_NOUN (sym->etype) == V_BIT ||
1467 SPEC_NOUN (sym->etype) == V_SBIT)
1469 SPEC_BLEN (sym->etype) = 1;
1470 SPEC_BSTR (sym->etype) = 0;
1474 /* variables declared in CODE space must have */
1475 /* initializers if not an extern */
1476 if (SPEC_SCLS (sym->etype) == S_CODE &&
1477 sym->ival == NULL &&
1480 port->mem.code_ro &&
1481 !IS_EXTERN (sym->etype) &&
1482 !funcInChain (sym->type))
1483 werror (E_CODE_NO_INIT, sym->name);
1486 /* if parameter or local variable then change */
1487 /* the storage class to reflect where the var will go */
1488 if (sym->level && SPEC_SCLS (sym->etype) == S_FIXED &&
1489 !IS_STATIC(sym->etype))
1491 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
1493 SPEC_SCLS (sym->etype) = (options.useXstack ?
1494 S_XSTACK : S_STACK);
1498 /* hack-o-matic! I see no reason why the useXstack option should ever
1499 * control this allcoation, but the code was originally that way, and
1500 * changing it for non-390 ports breaks the compiler badly.
1502 bool useXdata = (TARGET_IS_DS390 || TARGET_IS_DS400) ?
1503 1 : options.useXstack;
1504 SPEC_SCLS (sym->etype) = (useXdata ?
1510 /*------------------------------------------------------------------*/
1511 /* changePointer - change pointer to functions */
1512 /*------------------------------------------------------------------*/
1514 changePointer (symbol * sym)
1518 /* go thru the chain of declarations */
1519 /* if we find a pointer to a function */
1520 /* unconditionally change it to a ptr */
1522 for (p = sym->type; p; p = p->next)
1524 if (!IS_SPEC (p) && DCL_TYPE (p) == UPOINTER)
1525 DCL_TYPE (p) = port->unqualified_pointer;
1526 if (IS_PTR (p) && IS_FUNC (p->next))
1527 DCL_TYPE (p) = CPOINTER;
1531 /*------------------------------------------------------------------*/
1532 /* checkDecl - does semantic validation of a declaration */
1533 /*------------------------------------------------------------------*/
1535 checkDecl (symbol * sym, int isProto)
1538 checkSClass (sym, isProto); /* check the storage class */
1539 changePointer (sym); /* change pointers if required */
1541 /* if this is an array without any dimension
1542 then update the dimension from the initial value */
1543 if (IS_ARRAY (sym->type) && !DCL_ELEM (sym->type))
1544 DCL_ELEM (sym->type) = getNelements (sym->type, sym->ival);
1549 /*------------------------------------------------------------------*/
1550 /* copyLinkChain - makes a copy of the link chain & rets ptr 2 head */
1551 /*------------------------------------------------------------------*/
1553 copyLinkChain (sym_link * p)
1555 sym_link *head, *curr, *loop;
1558 head = loop = (curr ? newLink (p->class) : (void *) NULL);
1561 memcpy (loop, curr, sizeof (sym_link)); /* copy it */
1562 loop->next = (curr->next ? newLink (curr->next->class) : (void *) NULL);
1571 /*------------------------------------------------------------------*/
1572 /* cleanUpBlock - cleansup the symbol table specified for all the */
1573 /* symbols in the given block */
1574 /*------------------------------------------------------------------*/
1576 cleanUpBlock (bucket ** table, int block)
1581 /* go thru the entire table */
1582 for (i = 0; i < 256; i++)
1584 for (chain = table[i]; chain; chain = chain->next)
1586 if (chain->block >= block)
1588 deleteSym (table, chain->sym, chain->name);
1594 /*------------------------------------------------------------------*/
1595 /* cleanUpLevel - cleansup the symbol table specified for all the */
1596 /* symbols in the given level */
1597 /*------------------------------------------------------------------*/
1599 cleanUpLevel (bucket ** table, int level)
1604 /* go thru the entire table */
1605 for (i = 0; i < 256; i++)
1607 for (chain = table[i]; chain; chain = chain->next)
1609 if (chain->level >= level)
1611 deleteSym (table, chain->sym, chain->name);
1617 /*------------------------------------------------------------------*/
1618 /* computeTypeOr - computes the resultant type from two types */
1619 /*------------------------------------------------------------------*/
1621 computeTypeOr (sym_link * etype1, sym_link * etype2, sym_link * reType)
1624 assert ( (IS_CHAR (etype1) || IS_BIT (etype1))
1625 && (IS_CHAR (etype2) || IS_BIT (etype2)));
1627 if (SPEC_USIGN (etype1) == SPEC_USIGN (etype2))
1629 SPEC_USIGN (reType) = SPEC_USIGN (etype1);
1633 if (SPEC_USIGN (etype1))
1635 if ( IS_LITERAL (etype2)
1636 && floatFromVal (valFromType (etype2)) >= 0)
1637 SPEC_USIGN (reType) = 1;
1640 /* promote to int */
1641 SPEC_USIGN (reType) = 0;
1642 SPEC_NOUN (reType) = V_INT;
1645 else /* etype1 signed */
1647 if ( IS_LITERAL (etype2)
1648 && floatFromVal (valFromType (etype2)) <= 127)
1649 SPEC_USIGN (reType) = 0;
1652 /* promote to int */
1653 SPEC_USIGN (reType) = 0;
1654 SPEC_NOUN (reType) = V_INT;
1658 if (SPEC_USIGN (etype2))
1660 if ( IS_LITERAL (etype1)
1661 && floatFromVal (valFromType (etype1)) >= 0)
1662 SPEC_USIGN (reType) = 1;
1665 /* promote to int */
1666 SPEC_USIGN (reType) = 0;
1667 SPEC_NOUN (reType) = V_INT;
1670 else /* etype2 signed */
1672 if ( IS_LITERAL (etype1)
1673 && floatFromVal (valFromType (etype1)) <= 127)
1674 SPEC_USIGN (reType) = 0;
1677 /* promote to int */
1678 SPEC_USIGN (reType) = 0;
1679 SPEC_NOUN (reType) = V_INT;
1685 /*------------------------------------------------------------------*/
1686 /* computeType - computes the resultant type from two types */
1687 /*------------------------------------------------------------------*/
1689 computeType (sym_link * type1, sym_link * type2,
1690 RESULT_TYPE resultType, int op)
1694 sym_link *etype1 = getSpec (type1);
1697 etype2 = type2 ? getSpec (type2) : type1;
1699 /* if one of them is a float then result is a float */
1700 /* here we assume that the types passed are okay */
1701 /* and can be cast to one another */
1702 /* which ever is greater in size */
1703 if (IS_FLOAT (etype1) || IS_FLOAT (etype2))
1704 rType = newFloatLink ();
1706 /* if both are bitvars choose the larger one */
1707 if (IS_BITVAR (etype1) && IS_BITVAR (etype2))
1709 rType = SPEC_BLEN (etype1) >= SPEC_BLEN (etype2) ?
1710 copyLinkChain (type1) : copyLinkChain (type1);
1712 /* if only one of them is a bit variable
1713 then the other one prevails */
1714 else if (IS_BITVAR (etype1) && !IS_BITVAR (etype2))
1716 rType = copyLinkChain (type2);
1717 /* bitfield can have up to 16 bits */
1718 if (getSize (etype1) > 1)
1719 SPEC_NOUN (getSpec (rType)) = V_INT;
1721 else if (IS_BITVAR (etype2) && !IS_BITVAR (etype1))
1723 rType = copyLinkChain (type1);
1724 /* bitfield can have up to 16 bits */
1725 if (getSize (etype2) > 1)
1726 SPEC_NOUN (getSpec (rType)) = V_INT;
1729 /* if one of them is a pointer or array then that
1731 if (IS_PTR (type1) || IS_ARRAY (type1))
1732 rType = copyLinkChain (type1);
1733 else if (IS_PTR (type2) || IS_ARRAY (type2))
1734 rType = copyLinkChain (type2);
1735 else if (getSize (type1) > getSize (type2))
1736 rType = copyLinkChain (type1);
1738 rType = copyLinkChain (type2);
1740 reType = getSpec (rType);
1742 /* avoid conflicting types */
1743 reType->select.s._signed = 0;
1745 /* if result is a literal then make not so */
1746 if (IS_LITERAL (reType))
1747 SPEC_SCLS (reType) = S_REGISTER;
1751 case RESULT_TYPE_CHAR:
1752 if (IS_BITVAR (reType))
1754 SPEC_NOUN (reType) = V_CHAR;
1755 SPEC_SCLS (reType) = 0;
1756 SPEC_USIGN (reType) = 0;
1760 case RESULT_TYPE_INT:
1761 case RESULT_TYPE_NONE:
1762 case RESULT_TYPE_OTHER:
1763 if (IS_BIT (reType))
1765 SPEC_NOUN (reType) = V_CHAR;
1766 SPEC_SCLS (reType) = 0;
1767 SPEC_USIGN (reType) = 0;
1770 else if (IS_BITFIELD (reType))
1772 /* could be smarter, but it depends on the op */
1773 /* this is for the worst case: a multiplication of 4 * 4 bit */
1774 SPEC_NOUN (reType) = SPEC_BLEN (reType) <= 4 ? V_CHAR : V_INT;
1775 SPEC_SCLS (reType) = 0;
1776 SPEC_USIGN (reType) = 0;
1779 else if (IS_CHAR (reType))
1781 if (op == '|' || op == '^')
1782 return computeTypeOr (etype1, etype2, reType);
1784 && SPEC_USIGN (etype1) != SPEC_USIGN (etype2))
1786 SPEC_USIGN (reType) = 1;
1791 SPEC_NOUN (reType) = V_INT;
1792 SPEC_USIGN (reType) = 0;
1795 /* TODO: should be in SDCCast.c */
1797 && ( !SPEC_USIGN (etype1)
1798 || !SPEC_USIGN (etype2)))
1800 SPEC_NOUN (reType) = V_INT;
1801 SPEC_USIGN (reType) = 0;
1810 /* SDCC's sign promotion:
1811 - if one or both operands are unsigned, the resultant type will be unsigned
1812 (except char, see below)
1813 - if an operand is promoted to a larger type (char -> int, int -> long),
1814 the larger type will be signed
1816 SDCC tries hard to avoid promotion to int and does 8 bit calculation as
1817 much as possible. We're leaving ISO IEC 9899 here and have to extrapolate
1818 the standard. The standard demands, that the result has to be the same
1819 "as if" the promotion would have been performed:
1821 - if the result of an operation with two char's is promoted to a
1822 larger type, the result will be signed.
1824 More sophisticated are these:
1825 - if the result of an operation with two char's is a char again,
1826 the result will only then be unsigned, if both operands are
1827 unsigned. In all other cases the result will be signed.
1829 This seems to be contradictionary to the first two rules, but it makes
1830 real sense (all types are char's):
1832 A signed char can be negative; this must be preserved in the result
1835 Only if both operands are unsigned it's safe to make the result
1836 unsigned; this helps to avoid overflow:
1839 - ToDo: document '|', '^' and '&'
1841 Homework: - why is (200 * 200 < 0) true?
1842 - why is { char l = 200, r = 200; (r * l > 0) } true?
1845 if (!IS_FLOAT (reType)
1846 && ( (SPEC_USIGN (etype1)
1847 /* if this operand is promoted to a larger type,
1848 then it will be promoted to a signed type */
1849 && !(getSize (etype1) < getSize (reType))
1850 /* char require special handling */
1851 && !IS_CHAR (etype1))
1852 || /* same for 2nd operand */
1853 (SPEC_USIGN (etype2)
1854 && !(getSize (etype2) < getSize (reType))
1855 && !IS_CHAR (etype2))
1856 || /* if both are 'unsigned char' and not promoted
1857 let the result be unsigned too */
1858 ( SPEC_USIGN (etype1)
1859 && SPEC_USIGN (etype2)
1862 && IS_CHAR (reType))))
1863 SPEC_USIGN (reType) = 1;
1865 SPEC_USIGN (reType) = 0;
1870 /*--------------------------------------------------------------------*/
1871 /* compareType - will do type check return 1 if match, -1 if castable */
1872 /*--------------------------------------------------------------------*/
1874 compareType (sym_link * dest, sym_link * src)
1885 /* if dest is a declarator then */
1890 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
1892 //checkFunction(src,dest);
1894 return compareType (dest->next, src->next);
1896 if (IS_PTR (dest) && IS_GENPTR (src) && IS_VOID(src->next)) {
1899 if (IS_PTR (src) && IS_GENPTR (dest))
1901 if (IS_PTR (dest) && IS_ARRAY (src)) {
1902 value *val=aggregateToPointer (valFromType(src));
1903 int res=compareType (dest, val->type);
1904 Safe_free(val->type);
1908 if (IS_PTR (dest) && IS_FUNC (dest->next) && IS_FUNC (src))
1909 return compareType (dest->next, src);
1912 else if (IS_PTR (dest) && IS_INTEGRAL (src))
1918 /* if one is a specifier and the other is not */
1919 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
1920 (IS_SPEC (dest) && !IS_SPEC (src)))
1923 /* if one of them is a void then ok */
1924 if (SPEC_NOUN (dest) == V_VOID &&
1925 SPEC_NOUN (src) != V_VOID)
1928 if (SPEC_NOUN (dest) != V_VOID &&
1929 SPEC_NOUN (src) == V_VOID)
1932 /* if they are both bitfields then if the lengths
1933 and starts don't match */
1934 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
1935 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
1936 SPEC_BSTR (dest) != SPEC_BSTR (src)))
1939 /* it is a specifier */
1940 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
1942 if (SPEC_USIGN (dest) == SPEC_USIGN (src) &&
1943 IS_INTEGRAL (dest) && IS_INTEGRAL (src) &&
1945 bitsForType (dest) == bitsForType (src))
1946 instead of the next two lines, but the regression tests fail with
1947 them; I guess it's a problem with replaceCheaperOp */
1948 getSize (dest) == getSize (src) &&
1949 !(!IS_BIT (dest) && IS_BIT (src)))
1951 else if (IS_ARITHMETIC (dest) && IS_ARITHMETIC (src))
1956 else if (IS_STRUCT (dest))
1958 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
1963 if (SPEC_LONG (dest) != SPEC_LONG (src))
1966 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
1972 /*--------------------------------------------------------------------*/
1973 /* compareTypeExact - will do type check return 1 if match exactly */
1974 /*--------------------------------------------------------------------*/
1976 compareTypeExact (sym_link * dest, sym_link * src, int level)
1978 STORAGE_CLASS srcScls, destScls;
1989 /* if dest is a declarator then */
1994 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
1995 if ((DCL_TYPE (src) == ARRAY) && (DCL_ELEM (src) != DCL_ELEM (dest)))
1997 if (DCL_PTR_CONST (src) != DCL_PTR_CONST (dest))
1999 if (DCL_PTR_VOLATILE (src) != DCL_PTR_VOLATILE (dest))
2003 value *exargs, *acargs, *checkValue;
2005 /* verify function return type */
2006 if (!compareTypeExact (dest->next, src->next, -1))
2008 if (FUNC_ISISR (dest) != FUNC_ISISR (src))
2010 if (FUNC_REGBANK (dest) != FUNC_REGBANK (src))
2012 if (IFFUNC_ISNAKED (dest) != IFFUNC_ISNAKED (src))
2015 if (IFFUNC_ISREENT (dest) != IFFUNC_ISREENT (src) && argCnt>1)
2019 /* compare expected args with actual args */
2020 exargs = FUNC_ARGS(dest);
2021 acargs = FUNC_ARGS(src);
2023 /* for all the expected args do */
2024 for (; exargs && acargs; exargs = exargs->next, acargs = acargs->next)
2026 //checkTypeSanity(acargs->etype, acargs->name);
2028 if (IS_AGGREGATE (acargs->type))
2030 checkValue = copyValue (acargs);
2031 aggregateToPointer (checkValue);
2034 checkValue = acargs;
2037 if (!compareTypeExact (exargs->type, checkValue->type, -1))
2042 /* if one them ended we have a problem */
2043 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2044 (!exargs && acargs && !IS_VOID (acargs->type)))
2048 return compareTypeExact (dest->next, src->next, level);
2055 /* if one is a specifier and the other is not */
2056 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
2057 (IS_SPEC (dest) && !IS_SPEC (src)))
2060 /* if one of them is a void then ok */
2061 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
2064 /* if they are both bitfields then if the lengths
2065 and starts don't match */
2066 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
2067 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
2068 SPEC_BSTR (dest) != SPEC_BSTR (src)))
2071 if (IS_INTEGRAL (dest))
2073 /* signedness must match */
2074 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
2076 /* size must match */
2077 if (SPEC_LONG (dest) != SPEC_LONG (src))
2079 if (SPEC_SHORT (dest) != SPEC_SHORT (src))
2083 if (IS_STRUCT (dest))
2085 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
2089 if (SPEC_CONST (dest) != SPEC_CONST (src))
2091 if (SPEC_VOLATILE (dest) != SPEC_VOLATILE (src))
2093 if (SPEC_STAT (dest) != SPEC_STAT (src))
2095 if (SPEC_ABSA (dest) != SPEC_ABSA (src))
2097 if (SPEC_ABSA (dest) && SPEC_ADDR (dest) != SPEC_ADDR (src))
2100 destScls = SPEC_SCLS (dest);
2101 srcScls = SPEC_SCLS (src);
2103 /* Compensate for const to const code change in checkSClass() */
2104 if (!level & port->mem.code_ro && SPEC_CONST (dest))
2106 if (srcScls == S_CODE && destScls == S_FIXED)
2108 if (destScls == S_CODE && srcScls == S_FIXED)
2112 /* compensate for allocGlobal() */
2113 if ((srcScls == S_FIXED || srcScls == S_AUTO)
2114 && port->mem.default_globl_map == xdata
2118 if (level>0 && !SPEC_STAT (dest))
2120 /* Compensate for hack-o-matic in checkSClass() */
2121 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
2123 if (destScls == S_FIXED)
2124 destScls = (options.useXstack ? S_XSTACK : S_STACK);
2125 if (srcScls == S_FIXED)
2126 srcScls = (options.useXstack ? S_XSTACK : S_STACK);
2128 else if (TARGET_IS_DS390 || TARGET_IS_DS400 || options.useXstack)
2130 if (destScls == S_FIXED)
2132 if (srcScls == S_FIXED)
2137 if (srcScls != destScls)
2140 printf ("level = %d\n", level);
2141 printf ("SPEC_SCLS (src) = %d, SPEC_SCLS (dest) = %d\n",
2142 SPEC_SCLS (src), SPEC_SCLS (dest));
2143 printf ("srcScls = %d, destScls = %d\n",srcScls, destScls);
2151 /*------------------------------------------------------------------*/
2152 /* inCalleeSaveList - return 1 if found in callee save list */
2153 /*------------------------------------------------------------------*/
2155 calleeCmp(void *p1, void *p2)
2157 return (strcmp((char *)p1, (char *)(p2)) == 0);
2161 inCalleeSaveList(char *s)
2163 if (options.all_callee_saves)
2165 return isinSetWith(options.calleeSavesSet, s, calleeCmp);
2168 /*-----------------------------------------------------------------*/
2169 /* aggregateToPointer: change an agggregate type function */
2170 /* argument to a pointer to that type. */
2171 /*-----------------------------------------------------------------*/
2173 aggregateToPointer (value * val)
2175 if (IS_AGGREGATE (val->type))
2177 /* if this is a structure */
2178 /* then we need to add a new link */
2179 if (IS_STRUCT (val->type))
2181 /* first lets add DECLARATOR type */
2182 sym_link *p = val->type;
2184 werror (W_STRUCT_AS_ARG, val->name);
2185 val->type = newLink (DECLARATOR);
2186 val->type->next = p;
2189 /* change to a pointer depending on the */
2190 /* storage class specified */
2191 switch (SPEC_SCLS (val->etype))
2194 DCL_TYPE (val->type) = IPOINTER;
2197 DCL_TYPE (val->type) = PPOINTER;
2200 if (SPEC_OCLS(val->etype)) {
2201 DCL_TYPE(val->type)=PTR_TYPE(SPEC_OCLS(val->etype));
2203 // this happens for (external) function parameters
2204 DCL_TYPE (val->type) = port->unqualified_pointer;
2210 DCL_TYPE (val->type) = POINTER;
2213 DCL_TYPE (val->type) = CPOINTER;
2216 DCL_TYPE (val->type) = FPOINTER;
2219 DCL_TYPE (val->type) = EEPPOINTER;
2222 DCL_TYPE (val->type) = port->unqualified_pointer;
2225 /* is there is a symbol associated then */
2226 /* change the type of the symbol as well */
2229 val->sym->type = copyLinkChain (val->type);
2230 val->sym->etype = getSpec (val->sym->type);
2235 /*------------------------------------------------------------------*/
2236 /* checkFunction - does all kinds of check on a function */
2237 /*------------------------------------------------------------------*/
2239 checkFunction (symbol * sym, symbol *csym)
2241 value *exargs, *acargs;
2245 if (getenv("DEBUG_SANITY")) {
2246 fprintf (stderr, "checkFunction: %s ", sym->name);
2249 if (!IS_DECL(sym->type) || DCL_TYPE(sym->type)!=FUNCTION)
2251 werror(E_SYNTAX_ERROR, sym->name);
2255 /* make sure the type is complete and sane */
2256 checkTypeSanity(((symbol *)sym)->etype, ((symbol *)sym)->name);
2258 /* if not type then some kind of error */
2262 /* if the function has no type then make it return int */
2263 if (!sym->type->next)
2264 sym->type->next = sym->etype = newIntLink ();
2266 /* function cannot return aggregate */
2267 if (IS_AGGREGATE (sym->type->next))
2269 werror (E_FUNC_AGGR, sym->name);
2273 /* function cannot return bit */
2274 if (IS_BITVAR (sym->type->next))
2276 werror (E_FUNC_BIT, sym->name);
2280 /* check if this function is defined as calleeSaves
2281 then mark it as such */
2282 FUNC_CALLEESAVES(sym->type) = inCalleeSaveList (sym->name);
2284 /* if interrupt service routine */
2285 /* then it cannot have arguments */
2286 if (IFFUNC_ARGS(sym->type) && FUNC_ISISR (sym->type))
2288 if (!IS_VOID(FUNC_ARGS(sym->type)->type)) {
2289 werror (E_INT_ARGS, sym->name);
2290 FUNC_ARGS(sym->type)=NULL;
2294 for (argCnt=1, acargs = FUNC_ARGS(sym->type);
2296 acargs=acargs->next, argCnt++) {
2298 // this can happen for reentrant functions
2299 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2300 // the show must go on: synthesize a name and symbol
2301 SNPRINTF (acargs->name, sizeof(acargs->name), "_%s_PARM_%d", sym->name, argCnt);
2302 acargs->sym = newSymbol (acargs->name, 1);
2303 SPEC_OCLS (acargs->etype) = istack;
2304 acargs->sym->type = copyLinkChain (acargs->type);
2305 acargs->sym->etype = getSpec (acargs->sym->type);
2306 acargs->sym->_isparm = 1;
2307 strncpyz (acargs->sym->rname, acargs->name, sizeof(acargs->sym->rname));
2308 } else if (strcmp(acargs->sym->name, acargs->sym->rname)==0) {
2310 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2315 if (!csym && !(csym = findSym (SymbolTab, sym, sym->name)))
2316 return 1; /* not defined nothing more to check */
2318 /* check if body already present */
2319 if (csym && IFFUNC_HASBODY(csym->type))
2321 werror (E_FUNC_BODY, sym->name);
2325 /* check the return value type */
2326 if (compareType (csym->type, sym->type) <= 0)
2328 werror (E_PREV_DEF_CONFLICT, csym->name, "type");
2329 printFromToType(csym->type, sym->type);
2333 if (FUNC_ISISR (csym->type) != FUNC_ISISR (sym->type))
2335 werror (E_PREV_DEF_CONFLICT, csym->name, "interrupt");
2338 if (FUNC_REGBANK (csym->type) != FUNC_REGBANK (sym->type))
2340 werror (E_PREV_DEF_CONFLICT, csym->name, "using");
2343 if (IFFUNC_ISNAKED (csym->type) != IFFUNC_ISNAKED (sym->type))
2345 werror (E_PREV_DEF_CONFLICT, csym->name, "_naked");
2348 /* Really, reentrant should match regardless of argCnt, but */
2349 /* this breaks some existing code (the fp lib functions). If */
2350 /* the first argument is always passed the same way, this */
2351 /* lax checking is ok (but may not be true for in future ports) */
2352 if (IFFUNC_ISREENT (csym->type) != IFFUNC_ISREENT (sym->type)
2355 //printf("argCnt = %d\n",argCnt);
2356 werror (E_PREV_DEF_CONFLICT, csym->name, "reentrant");
2359 /* compare expected args with actual args */
2360 exargs = FUNC_ARGS(csym->type);
2361 acargs = FUNC_ARGS(sym->type);
2363 /* for all the expected args do */
2366 exargs = exargs->next, acargs = acargs->next, argCnt++)
2368 if (getenv("DEBUG_SANITY")) {
2369 fprintf (stderr, "checkFunction: %s ", exargs->name);
2371 /* make sure the type is complete and sane */
2372 checkTypeSanity(exargs->etype, exargs->name);
2374 /* If the actual argument is an array, any prototype
2375 * will have modified it to a pointer. Duplicate that
2378 if (IS_AGGREGATE (acargs->type))
2380 checkValue = copyValue (acargs);
2381 aggregateToPointer (checkValue);
2385 checkValue = acargs;
2388 if (compareType (exargs->type, checkValue->type) <= 0)
2390 werror (E_ARG_TYPE, argCnt);
2391 printFromToType(exargs->type, checkValue->type);
2396 /* if one them ended we have a problem */
2397 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2398 (!exargs && acargs && !IS_VOID (acargs->type)))
2399 werror (E_ARG_COUNT);
2401 /* replace with this defition */
2402 sym->cdef = csym->cdef;
2403 deleteSym (SymbolTab, csym, csym->name);
2404 deleteFromSeg(csym);
2405 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
2406 if (IS_EXTERN (csym->etype) && !
2407 IS_EXTERN (sym->etype))
2409 addSet (&publics, sym);
2414 /*------------------------------------------------------------------*/
2415 /* cdbStructBlock - calls struct printing for a blcks */
2416 /*------------------------------------------------------------------*/
2417 void cdbStructBlock (int block)
2420 bucket **table = StructTab;
2423 /* go thru the entire table */
2424 for (i = 0; i < 256; i++)
2426 for (chain = table[i]; chain; chain = chain->next)
2428 if (chain->block >= block)
2431 debugFile->writeType((structdef *)chain->sym, chain->block, 0, NULL);
2437 /*-----------------------------------------------------------------*/
2438 /* processFuncArgs - does some processing with function args */
2439 /*-----------------------------------------------------------------*/
2441 processFuncArgs (symbol * func)
2445 sym_link *funcType=func->type;
2447 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
2448 fprintf (stderr, "SDCCsymt.c:processFuncArgs(%s)\n", func->name);
2450 /* find the function declaration within the type */
2451 while (funcType && !IS_FUNC(funcType))
2452 funcType=funcType->next;
2454 /* if this function has variable argument list */
2455 /* then make the function a reentrant one */
2456 if (IFFUNC_HASVARARGS(funcType) || (options.stackAuto && !func->cdef))
2457 FUNC_ISREENT(funcType)=1;
2459 /* check if this function is defined as calleeSaves
2460 then mark it as such */
2461 FUNC_CALLEESAVES(funcType) = inCalleeSaveList (func->name);
2463 /* loop thru all the arguments */
2464 val = FUNC_ARGS(funcType);
2466 /* if it is void then remove parameters */
2467 if (val && IS_VOID (val->type))
2469 FUNC_ARGS(funcType) = NULL;
2473 /* reset regparm for the port */
2474 (*port->reset_regparms) ();
2475 /* if any of the arguments is an aggregate */
2476 /* change it to pointer to the same type */
2480 /* mark it as a register parameter if
2481 the function does not have VA_ARG
2482 and as port dictates */
2483 if (!IFFUNC_HASVARARGS(funcType) &&
2484 (argreg = (*port->reg_parm) (val->type)))
2486 SPEC_REGPARM (val->etype) = 1;
2487 SPEC_ARGREG(val->etype) = argreg;
2488 } else if (IFFUNC_ISREENT(funcType)) {
2489 FUNC_HASSTACKPARM(funcType) = 1;
2492 if (IS_AGGREGATE (val->type))
2494 aggregateToPointer (val);
2501 /* if this is an internal generated function call */
2503 /* ignore --stack-auto for this one, we don't know how it is compiled */
2504 /* simply trust on --int-long-reent or --float-reent */
2505 if (IFFUNC_ISREENT(funcType)) {
2509 /* if this function is reentrant or */
2510 /* automatics r 2b stacked then nothing */
2511 if (IFFUNC_ISREENT (funcType) || options.stackAuto)
2515 val = FUNC_ARGS(funcType);
2520 /* if a symbolname is not given */
2521 /* synthesize a variable name */
2524 SNPRINTF (val->name, sizeof(val->name),
2525 "_%s_PARM_%d", func->name, pNum++);
2526 val->sym = newSymbol (val->name, 1);
2527 SPEC_OCLS (val->etype) = port->mem.default_local_map;
2528 val->sym->type = copyLinkChain (val->type);
2529 val->sym->etype = getSpec (val->sym->type);
2530 val->sym->_isparm = 1;
2531 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2533 /* ?? static functions shouldn't imply static parameters - EEP */
2534 if (IS_SPEC(func->etype)) {
2535 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2536 SPEC_STAT (func->etype);
2539 addSymChain (val->sym);
2542 else /* symbol name given create synth name */
2545 SNPRINTF (val->name, sizeof(val->name), "_%s_PARM_%d", func->name, pNum++);
2546 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2547 val->sym->_isparm = 1;
2548 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) =
2549 (options.model != MODEL_SMALL ? xdata : data);
2552 /* ?? static functions shouldn't imply static parameters - EEP */
2553 if (IS_SPEC(func->etype)) {
2554 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2555 SPEC_STAT (func->etype);
2559 if (!isinSet(operKeyReset, val->sym)) {
2560 addSet (&operKeyReset, val->sym);
2561 applyToSet (operKeyReset, resetParmKey);
2567 /*-----------------------------------------------------------------*/
2568 /* isSymbolEqual - compares two symbols return 1 if they match */
2569 /*-----------------------------------------------------------------*/
2571 isSymbolEqual (symbol * dest, symbol * src)
2573 /* if pointers match then equal */
2577 /* if one of them is null then don't match */
2581 /* if both of them have rname match on rname */
2582 if (dest->rname[0] && src->rname[0])
2583 return (!strcmp (dest->rname, src->rname));
2585 /* otherwise match on name */
2586 return (!strcmp (dest->name, src->name));
2589 void PT(sym_link *type)
2591 printTypeChain(type,0);
2593 /*-----------------------------------------------------------------*/
2594 /* printTypeChain - prints the type chain in human readable form */
2595 /*-----------------------------------------------------------------*/
2597 printTypeChain (sym_link * start, FILE * of)
2601 sym_link * type, * search;
2611 fprintf (of, "void");
2615 /* Print the chain as it is written in the source: */
2616 /* start with the last entry. */
2617 /* However, the storage class at the end of the */
2618 /* chain reall applies to the first in the chain! */
2620 for (type = start; type && type->next; type = type->next)
2623 scls=SPEC_SCLS(type);
2631 case S_DATA: fprintf (of, "data-"); break;
2632 case S_XDATA: fprintf (of, "xdata-"); break;
2633 case S_SFR: fprintf (of, "sfr-"); break;
2634 case S_SBIT: fprintf (of, "sbit-"); break;
2635 case S_CODE: fprintf (of, "code-"); break;
2636 case S_IDATA: fprintf (of, "idata-"); break;
2637 case S_PDATA: fprintf (of, "pdata-"); break;
2638 case S_LITERAL: fprintf (of, "literal-"); break;
2639 case S_STACK: fprintf (of, "stack-"); break;
2640 case S_XSTACK: fprintf (of, "xstack-"); break;
2641 case S_BIT: fprintf (of, "bit-"); break;
2642 case S_EEPROM: fprintf (of, "eeprom-"); break;
2649 if (!IS_FUNC(type)) {
2650 if (DCL_PTR_VOLATILE (type)) {
2651 fprintf (of, "volatile-");
2653 if (DCL_PTR_CONST (type)) {
2654 fprintf (of, "const-");
2657 switch (DCL_TYPE (type))
2660 fprintf (of, "function %s %s",
2661 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2662 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2664 for (args = FUNC_ARGS(type);
2667 printTypeChain(args->type, of);
2674 fprintf (of, "generic* ");
2677 fprintf (of, "code* ");
2680 fprintf (of, "xdata* ");
2683 fprintf (of, "eeprom* ");
2686 fprintf (of, "near* ");
2689 fprintf (of, "idata* ");
2692 fprintf (of, "pdata* ");
2695 fprintf (of, "unknown* ");
2698 if (DCL_ELEM(type)) {
2699 fprintf (of, "[%d] ", DCL_ELEM(type));
2701 fprintf (of, "[] ");
2708 if (SPEC_VOLATILE (type))
2709 fprintf (of, "volatile-");
2710 if (SPEC_CONST (type))
2711 fprintf (of, "const-");
2712 if (SPEC_USIGN (type))
2713 fprintf (of, "unsigned-");
2714 switch (SPEC_NOUN (type))
2718 fprintf (of, "long-");
2719 fprintf (of, "int");
2723 fprintf (of, "char");
2727 fprintf (of, "void");
2731 fprintf (of, "float");
2735 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2739 fprintf (of, "sbit");
2743 fprintf (of, "bit");
2747 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2751 fprintf (of, "double");
2755 fprintf (of, "unknown type");
2759 /* search entry in list before "type" */
2760 for (search = start; search && search->next != type;)
2761 search = search->next;
2770 /*--------------------------------------------------------------------*/
2771 /* printTypeChainRaw - prints the type chain in human readable form */
2772 /* in the raw data structure ordering */
2773 /*--------------------------------------------------------------------*/
2775 printTypeChainRaw (sym_link * start, FILE * of)
2788 fprintf (of, "void");
2798 if (!IS_FUNC(type)) {
2799 if (DCL_PTR_VOLATILE (type)) {
2800 fprintf (of, "volatile-");
2802 if (DCL_PTR_CONST (type)) {
2803 fprintf (of, "const-");
2806 switch (DCL_TYPE (type))
2809 fprintf (of, "function %s %s",
2810 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2811 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2813 for (args = FUNC_ARGS(type);
2816 printTypeChain(args->type, of);
2823 fprintf (of, "generic* ");
2826 fprintf (of, "code* ");
2829 fprintf (of, "xdata* ");
2832 fprintf (of, "eeprom* ");
2835 fprintf (of, "near* ");
2838 fprintf (of, "idata* ");
2841 fprintf (of, "pdata* ");
2844 fprintf (of, "unknown* ");
2847 if (DCL_ELEM(type)) {
2848 fprintf (of, "[%d] ", DCL_ELEM(type));
2850 fprintf (of, "[] ");
2854 if (DCL_TSPEC(type))
2857 printTypeChainRaw(DCL_TSPEC(type), of);
2861 else if (IS_SPEC (type))
2863 switch (SPEC_SCLS (type))
2865 case S_DATA: fprintf (of, "data-"); break;
2866 case S_XDATA: fprintf (of, "xdata-"); break;
2867 case S_SFR: fprintf (of, "sfr-"); break;
2868 case S_SBIT: fprintf (of, "sbit-"); break;
2869 case S_CODE: fprintf (of, "code-"); break;
2870 case S_IDATA: fprintf (of, "idata-"); break;
2871 case S_PDATA: fprintf (of, "pdata-"); break;
2872 case S_LITERAL: fprintf (of, "literal-"); break;
2873 case S_STACK: fprintf (of, "stack-"); break;
2874 case S_XSTACK: fprintf (of, "xstack-"); break;
2875 case S_BIT: fprintf (of, "bit-"); break;
2876 case S_EEPROM: fprintf (of, "eeprom-"); break;
2879 if (SPEC_VOLATILE (type))
2880 fprintf (of, "volatile-");
2881 if (SPEC_CONST (type))
2882 fprintf (of, "const-");
2883 if (SPEC_USIGN (type))
2884 fprintf (of, "unsigned-");
2885 switch (SPEC_NOUN (type))
2889 fprintf (of, "long-");
2890 fprintf (of, "int");
2894 fprintf (of, "char");
2898 fprintf (of, "void");
2902 fprintf (of, "float");
2906 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2910 fprintf (of, "sbit");
2914 fprintf (of, "bit");
2918 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2922 fprintf (of, "double");
2926 fprintf (of, "unknown type");
2931 fprintf (of, "NOT_SPEC_OR_DECL");
2941 /*-----------------------------------------------------------------*/
2942 /* powof2 - returns power of two for the number if number is pow 2 */
2943 /*-----------------------------------------------------------------*/
2945 powof2 (TYPE_UDWORD num)
2958 if (n1s > 1 || nshifts == 0)
2974 /* Dims: mul/div/mod, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
2975 symbol *__muldiv[3][3][2];
2976 /* Dims: BYTE/WORD/DWORD SIGNED/UNSIGNED */
2977 sym_link *__multypes[3][2];
2978 /* Dims: to/from float, BYTE/WORD/DWORD, SIGNED/USIGNED */
2979 symbol *__conv[2][3][2];
2980 /* Dims: shift left/shift right, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
2981 symbol *__rlrr[2][3][2];
2983 sym_link *floatType;
2986 _mangleFunctionName(char *in)
2988 if (port->getMangledFunctionName)
2990 return port->getMangledFunctionName(in);
2998 /*-----------------------------------------------------------------*/
2999 /* typeFromStr - create a typechain from an encoded string */
3000 /* basic types - 'c' - char */
3006 /* '*' - pointer - default (GPOINTER) */
3007 /* modifiers - 'u' - unsigned */
3008 /* pointer modifiers - 'g' - generic */
3012 /* 'F' - function */
3013 /* examples : "ig*" - generic int * */
3014 /* "cx*" - char xdata * */
3015 /* "ui" - unsigned int */
3016 /*-----------------------------------------------------------------*/
3017 sym_link *typeFromStr (char *s)
3019 sym_link *r = newLink(DECLARATOR);
3031 r->class = SPECIFIER;
3032 SPEC_NOUN(r) = V_CHAR;
3036 r->class = SPECIFIER;
3037 SPEC_NOUN(r) = V_INT;
3040 r->class = SPECIFIER;
3041 SPEC_NOUN(r) = V_INT;
3045 r->class = SPECIFIER;
3046 SPEC_NOUN(r) = V_FLOAT;
3049 r->class = SPECIFIER;
3050 SPEC_NOUN(r) = V_VOID;
3053 DCL_TYPE(r) = port->unqualified_pointer;
3060 assert(*(s+1)=='*');
3061 nr = newLink(DECLARATOR);
3066 DCL_TYPE(r) = GPOINTER;
3069 DCL_TYPE(r) = FPOINTER;
3072 DCL_TYPE(r) = CPOINTER;
3075 DCL_TYPE(r) = POINTER;
3078 DCL_TYPE(r) = FUNCTION;
3079 nr = newLink(DECLARATOR);
3082 DCL_TYPE(r) = CPOINTER;
3088 werror(E_INTERNAL_ERROR, __FILE__, __LINE__,
3089 "typeFromStr: unknown type");
3092 if (IS_SPEC(r) && usign) {
3101 /*-----------------------------------------------------------------*/
3102 /* initCSupport - create functions for C support routines */
3103 /*-----------------------------------------------------------------*/
3107 const char *smuldivmod[] =
3111 const char *sbwd[] =
3113 "char", "int", "long"
3119 const char *srlrr[] =
3124 int bwd, su, muldivmod, tofrom, rlrr;
3126 if (getenv("SDCC_NO_C_SUPPORT")) {
3127 /* for debugging only */
3131 floatType = newFloatLink ();
3133 for (bwd = 0; bwd < 3; bwd++)
3150 __multypes[bwd][0] = l;
3151 __multypes[bwd][1] = copyLinkChain (l);
3152 SPEC_USIGN (__multypes[bwd][1]) = 1;
3155 __fsadd = funcOfType ("__fsadd", floatType, floatType, 2, options.float_rent);
3156 __fssub = funcOfType ("__fssub", floatType, floatType, 2, options.float_rent);
3157 __fsmul = funcOfType ("__fsmul", floatType, floatType, 2, options.float_rent);
3158 __fsdiv = funcOfType ("__fsdiv", floatType, floatType, 2, options.float_rent);
3159 __fseq = funcOfType ("__fseq", CHARTYPE, floatType, 2, options.float_rent);
3160 __fsneq = funcOfType ("__fsneq", CHARTYPE, floatType, 2, options.float_rent);
3161 __fslt = funcOfType ("__fslt", CHARTYPE, floatType, 2, options.float_rent);
3162 __fslteq = funcOfType ("__fslteq", CHARTYPE, floatType, 2, options.float_rent);
3163 __fsgt = funcOfType ("__fsgt", CHARTYPE, floatType, 2, options.float_rent);
3164 __fsgteq = funcOfType ("__fsgteq", CHARTYPE, floatType, 2, options.float_rent);
3166 for (tofrom = 0; tofrom < 2; tofrom++)
3168 for (bwd = 0; bwd < 3; bwd++)
3170 for (su = 0; su < 2; su++)
3174 SNPRINTF (buffer, sizeof(buffer), "__fs2%s%s", ssu[su], sbwd[bwd]);
3175 __conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], floatType, 1, options.float_rent);
3179 SNPRINTF (buffer, sizeof(buffer), "__%s%s2fs", ssu[su], sbwd[bwd]);
3180 __conv[tofrom][bwd][su] = funcOfType (buffer, floatType, __multypes[bwd][su], 1, options.float_rent);
3187 for (muldivmod = 0; muldivmod < 3; muldivmod++)
3189 for (bwd = 0; bwd < 3; bwd++)
3191 for (su = 0; su < 2; su++)
3193 SNPRINTF (buffer, sizeof(buffer),
3195 smuldivmod[muldivmod],
3198 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3199 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3204 muluint() and mulsint() resp. mululong() and mulslong() return the same result.
3205 Therefore they've been merged into mulint() and mullong().
3208 for (bwd = 0; bwd < 3; bwd++)
3210 for (su = 0; su < 2; su++)
3212 for (muldivmod = 1; muldivmod < 3; muldivmod++)
3215 SNPRINTF (buffer, sizeof(buffer),
3217 smuldivmod[muldivmod],
3220 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3221 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3229 for (su = 0; su < 2; su++)
3231 /* muluchar and mulschar are still separate functions, because e.g. the z80
3232 port is sign/zero-extending to int before calling mulint() */
3233 SNPRINTF (buffer, sizeof(buffer),
3235 smuldivmod[muldivmod],
3238 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3239 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3243 /* word and doubleword */
3244 for (bwd = 1; bwd < 3; bwd++)
3247 SNPRINTF (buffer, sizeof(buffer),
3249 smuldivmod[muldivmod],
3251 __muldiv[muldivmod][bwd][0] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3252 FUNC_NONBANKED (__muldiv[muldivmod][bwd][0]->type) = 1;
3253 /* signed = unsigned */
3254 __muldiv[muldivmod][bwd][1] = __muldiv[muldivmod][bwd][0];
3257 for (rlrr = 0; rlrr < 2; rlrr++)
3259 for (bwd = 0; bwd < 3; bwd++)
3261 for (su = 0; su < 2; su++)
3263 SNPRINTF (buffer, sizeof(buffer),
3268 __rlrr[rlrr][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[0][0], 2, options.intlong_rent);
3269 FUNC_NONBANKED (__rlrr[rlrr][bwd][su]->type) = 1;
3275 /*-----------------------------------------------------------------*/
3276 /* initBuiltIns - create prototypes for builtin functions */
3277 /*-----------------------------------------------------------------*/
3283 if (!port->builtintable) return ;
3285 for (i = 0 ; port->builtintable[i].name ; i++) {
3286 sym = funcOfTypeVarg(port->builtintable[i].name,port->builtintable[i].rtype,
3287 port->builtintable[i].nParms,port->builtintable[i].parm_types);
3288 FUNC_ISBUILTIN(sym->type) = 1;
3289 FUNC_ISREENT(sym->type) = 0; /* can never be reentrant */
3293 sym_link *validateLink(sym_link *l,
3300 if (l && l->class==select)
3305 "Internal error: validateLink failed in %s(%s) @ %s:%u:"
3306 " expected %s, got %s\n",
3307 macro, args, file, line,
3308 DECLSPEC2TXT(select), l ? DECLSPEC2TXT(l->class) : "null-link");
3310 return l; // never reached, makes compiler happy.
3313 /*--------------------------------------------------------------------*/
3314 /* newEnumType - create an integer type compatible with enumerations */
3315 /*--------------------------------------------------------------------*/
3317 newEnumType (symbol *enumlist)
3325 type = newLink (SPECIFIER);
3326 SPEC_NOUN (type) = V_INT;
3330 /* Determine the range of the enumerated values */
3332 min = max = (int) floatFromVal (valFromType (sym->type));
3333 for (sym = sym->next; sym; sym = sym->next)
3335 v = (int) floatFromVal (valFromType (sym->type));
3342 /* Determine the smallest integer type that is compatible with this range */
3343 type = newLink (SPECIFIER);
3344 if (min>=0 && max<=255)
3346 SPEC_NOUN (type) = V_CHAR;
3347 SPEC_USIGN (type) = 1;
3349 else if (min>=-128 && max<=127)
3351 SPEC_NOUN (type) = V_CHAR;
3353 else if (min>=0 && max<=65535)
3355 SPEC_NOUN (type) = V_INT;
3356 SPEC_USIGN (type) = 1;
3358 else if (min>=-32768 && max<=32767)
3360 SPEC_NOUN (type) = V_INT;
3364 SPEC_NOUN (type) = V_INT;
3365 SPEC_LONG (type) = 1;
3367 SPEC_USIGN (type) = 1;