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 (SPEC_SHORT(sl)) return "short";
49 case V_FLOAT: return "float";
50 case V_FIXED16X16: return "fixed16x16";
51 case V_CHAR: return "char";
52 case V_VOID: return "void";
53 case V_STRUCT: return "struct";
54 case V_LABEL: return "label";
55 case V_BITFIELD: return "bitfield";
56 case V_BIT: return "bit";
57 case V_SBIT: return "sbit";
58 case V_DOUBLE: return "double";
63 bucket *SymbolTab[256]; /* the symbol table */
64 bucket *StructTab[256]; /* the structure table */
65 bucket *TypedefTab[256]; /* the typedef table */
66 bucket *LabelTab[256]; /* the Label table */
67 bucket *enumTab[256]; /* enumerated table */
69 /*------------------------------------------------------------------*/
70 /* initSymt () - initialises symbol table related stuff */
71 /*------------------------------------------------------------------*/
77 for (i = 0; i < 256; i++)
78 SymbolTab[i] = StructTab[i] = (void *) NULL;
82 /*-----------------------------------------------------------------*/
83 /* newBucket - allocates & returns a new bucket */
84 /*-----------------------------------------------------------------*/
90 bp = Safe_alloc ( sizeof (bucket));
95 /*-----------------------------------------------------------------*/
96 /* hashKey - computes the hashkey given a symbol name */
97 /*-----------------------------------------------------------------*/
99 hashKey (const char *s)
101 unsigned long key = 0;
108 /*-----------------------------------------------------------------*/
109 /* addSym - adds a symbol to the hash Table */
110 /*-----------------------------------------------------------------*/
112 addSym (bucket ** stab,
119 int i; /* index into the hash Table */
120 bucket *bp; /* temp bucket * */
123 symbol *csym = (symbol *)sym;
125 if (getenv("DEBUG_SANITY")) {
126 fprintf (stderr, "addSym: %s ", sname);
128 /* make sure the type is complete and sane */
129 checkTypeSanity(csym->etype, csym->name);
132 /* prevent overflow of the (r)name buffers */
133 if (strlen(sname)>SDCC_SYMNAME_MAX) {
134 werror (W_SYMBOL_NAME_TOO_LONG, SDCC_SYMNAME_MAX);
135 sname[SDCC_SYMNAME_MAX]='\0';
138 /* the symbols are always added at the head of the list */
140 /* get a free entry */
141 bp = Safe_alloc ( sizeof (bucket));
143 bp->sym = sym; /* update the symbol pointer */
144 bp->level = level; /* update the nest level */
146 strncpyz (bp->name, sname, sizeof(bp->name)); /* copy the name into place */
148 /* if this is the first entry */
151 bp->prev = bp->next = (void *) NULL; /* point to nothing */
154 /* not first entry then add @ head of list */
164 /*-----------------------------------------------------------------*/
165 /* deleteSym - deletes a symbol from the hash Table entry */
166 /*-----------------------------------------------------------------*/
168 deleteSym (bucket ** stab, void *sym, char *sname)
176 /* find the symbol */
179 if (bp->sym == sym) /* found it then break out */
180 break; /* of the loop */
184 if (!bp) /* did not find it */
186 /* if this is the first one in the chain */
190 if (stab[i]) /* if chain ! empty */
191 stab[i]->prev = (void *) NULL;
193 /* middle || end of chain */
196 if (bp->next) /* if not end of chain */
197 bp->next->prev = bp->prev;
199 bp->prev->next = bp->next;
204 /*-----------------------------------------------------------------*/
205 /* findSym - finds a symbol in a table */
206 /*-----------------------------------------------------------------*/
208 findSym (bucket ** stab, void *sym, const char *sname)
212 bp = stab[hashKey (sname)];
215 if (bp->sym == sym || strcmp (bp->name, sname) == 0)
220 return (bp ? bp->sym : (void *) NULL);
223 /*-----------------------------------------------------------------*/
224 /* findSymWithLevel - finds a symbol with a name & level */
225 /*-----------------------------------------------------------------*/
227 findSymWithLevel (bucket ** stab, symbol * sym)
231 bp = stab[hashKey (sym->name)];
234 ** do the search from the head of the list since the
235 ** elements are added at the head it is ensured that
236 ** we will find the deeper definitions before we find
237 ** the global ones. we need to check for symbols with
238 ** level <= to the level given, if levels match then block
239 ** numbers need to match as well
243 if (strcmp (bp->name, sym->name) == 0 && bp->level <= sym->level)
245 /* if this is parameter then nothing else need to be checked */
246 if (((symbol *) (bp->sym))->_isparm)
248 /* if levels match then block numbers should also match */
249 if (bp->level && bp->level == sym->level && bp->block == sym->block)
251 /* if levels don't match then we are okay */
252 if (bp->level && bp->level != sym->level && bp->block <= sym->block)
254 /* if this is a global variable then we are ok too */
262 return (void *) NULL;
265 /*-----------------------------------------------------------------*/
266 /* findSymWithBlock - finds a symbol with name in with a block */
267 /*-----------------------------------------------------------------*/
269 findSymWithBlock (bucket ** stab, symbol * sym, int block)
273 bp = stab[hashKey (sym->name)];
276 if (strcmp (bp->name, sym->name) == 0 &&
282 return (bp ? bp->sym : (void *) NULL);
285 /*------------------------------------------------------------------*/
286 /* newSymbol () - returns a new pointer to a symbol */
287 /*------------------------------------------------------------------*/
289 newSymbol (char *name, int scope)
293 sym = Safe_alloc ( sizeof (symbol));
295 strncpyz (sym->name, name, sizeof(sym->name)); /* copy the name */
296 sym->level = scope; /* set the level */
297 sym->block = currBlockno;
298 sym->lineDef = mylineno; /* set the line number */
299 sym->fileDef = currFname;
303 /*------------------------------------------------------------------*/
304 /* newLink - creates a new link (declarator,specifier) */
305 /*------------------------------------------------------------------*/
307 newLink (SYM_LINK_CLASS select)
311 p = Safe_alloc ( sizeof (sym_link));
317 /*------------------------------------------------------------------*/
318 /* newStruct - creats a new structdef from the free list */
319 /*------------------------------------------------------------------*/
321 newStruct (char *tag)
325 s = Safe_alloc ( sizeof (structdef));
327 strncpyz (s->tag, tag, sizeof(s->tag)); /* copy the tag */
331 /*------------------------------------------------------------------*/
332 /* sclsFromPtr - Return the storage class a pointer points into. */
333 /* S_FIXED is returned for generic pointers or other */
334 /* unexpected cases */
335 /*------------------------------------------------------------------*/
337 sclsFromPtr(sym_link *ptr)
339 switch (DCL_TYPE (ptr))
362 /*------------------------------------------------------------------*/
363 /* pointerTypes - do the computation for the pointer types */
364 /*------------------------------------------------------------------*/
366 pointerTypes (sym_link * ptr, sym_link * type)
371 /* find the first pointer type */
372 while (ptr && !IS_PTR (ptr))
375 /* could not find it */
376 if (!ptr || IS_SPEC (ptr))
379 if (IS_PTR(ptr) && DCL_TYPE(ptr)!=UPOINTER) {
380 pointerTypes (ptr->next, type);
384 /* change the pointer type depending on the
385 storage class of the type */
388 switch (SPEC_SCLS (type))
391 DCL_TYPE (ptr) = FPOINTER;
394 DCL_TYPE (ptr) = IPOINTER;
397 DCL_TYPE (ptr) = PPOINTER;
400 DCL_TYPE (ptr) = POINTER;
403 DCL_TYPE (ptr) = CPOINTER;
406 DCL_TYPE (ptr) = EEPPOINTER;
409 DCL_TYPE (ptr) = port->unqualified_pointer;
412 /* the storage class of type ends here */
413 SPEC_SCLS (type) = 0;
416 /* now change all the remaining unknown pointers
417 to generic pointers */
420 if (!IS_SPEC (ptr) && DCL_TYPE (ptr) == UPOINTER)
421 DCL_TYPE (ptr) = port->unqualified_pointer;
425 /* same for the type although it is highly unlikely that
426 type will have a pointer */
429 if (!IS_SPEC (type) && DCL_TYPE (type) == UPOINTER)
430 DCL_TYPE (type) = port->unqualified_pointer;
435 /*------------------------------------------------------------------*/
436 /* addDecl - adds a declarator @ the end of a chain */
437 /*------------------------------------------------------------------*/
439 addDecl (symbol * sym, int type, sym_link * p)
445 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
446 fprintf (stderr, "SDCCsymt.c:addDecl(%s,%d,%p)\n", sym->name, type, p);
448 /* if we are passed a link then set head & tail */
457 head = tail = newLink (DECLARATOR);
458 DCL_TYPE (head) = type;
461 /* if this is the first entry */
469 if (IS_SPEC (sym->etype) && IS_SPEC (head) && head == tail)
471 sym->etype = mergeSpec (sym->etype, head, sym->name);
475 if (IS_SPEC (sym->etype) && !IS_SPEC (head) && head == tail)
478 while (t->next != sym->etype)
481 tail->next = sym->etype;
485 sym->etype->next = head;
491 /* if the type is an unknown pointer and has
492 a tspec then take the storage class const & volatile
493 attribute from the tspec & make it those of this
497 //DCL_TYPE (p) == UPOINTER &&
500 if (!IS_SPEC (sym->etype))
502 sym->etype = sym->etype->next = newLink (SPECIFIER);
504 SPEC_SCLS (sym->etype) = SPEC_SCLS (DCL_TSPEC (p));
505 DCL_TSPEC (p) = NULL;
508 // if there is a function in this type chain
509 if (p && funcInChain(sym->type)) {
510 processFuncArgs (sym);
516 /*------------------------------------------------------------------
517 checkTypeSanity: prevent the user from doing e.g.:
519 ------------------------------------------------------------------*/
520 void checkTypeSanity(sym_link *etype, char *name) {
524 if (getenv("DEBUG_SANITY")) {
525 fprintf (stderr, "sanity check skipped for %s (etype==0)\n", name);
530 if (!IS_SPEC(etype)) {
531 if (getenv("DEBUG_SANITY")) {
532 fprintf (stderr, "sanity check skipped for %s (!IS_SPEC)\n", name);
537 noun=nounName(etype);
539 if (getenv("DEBUG_SANITY")) {
540 fprintf (stderr, "checking sanity for %s %p\n", name, etype);
543 if ((SPEC_NOUN(etype)==V_CHAR ||
544 SPEC_NOUN(etype)==V_FLOAT ||
545 SPEC_NOUN(etype)==V_FIXED16X16 ||
546 SPEC_NOUN(etype)==V_DOUBLE ||
547 SPEC_NOUN(etype)==V_VOID) &&
548 (SPEC_SHORT(etype) || SPEC_LONG(etype))) {
549 // long or short for char float double or void
550 werror (E_LONG_OR_SHORT_INVALID, noun, name);
552 if ((SPEC_NOUN(etype)==V_FLOAT ||
553 SPEC_NOUN(etype)==V_FIXED16X16 ||
554 SPEC_NOUN(etype)==V_DOUBLE ||
555 SPEC_NOUN(etype)==V_VOID) &&
556 (etype->select.s.b_signed || SPEC_USIGN(etype))) {
557 // signed or unsigned for float double or void
558 werror (E_SIGNED_OR_UNSIGNED_INVALID, noun, name);
561 // special case for "short"
562 if (SPEC_SHORT(etype)) {
563 SPEC_NOUN(etype) = options.shortis8bits ? V_CHAR : V_INT;
564 SPEC_SHORT(etype) = 0;
568 "const a;" or "data b;" or "signed s" or "long l"
570 if (!SPEC_NOUN(etype)) {
571 SPEC_NOUN(etype)=V_INT;
574 /* ISO/IEC 9899 J.3.9 implementation defined behaviour: */
575 /* a "plain" int bitfield is unsigned */
576 if (SPEC_NOUN(etype)==V_BIT ||
577 SPEC_NOUN(etype)==V_SBIT) {
578 if (!etype->select.s.b_signed)
579 SPEC_USIGN(etype) = 1;
582 if (etype->select.s.b_signed && SPEC_USIGN(etype)) {
583 // signed AND unsigned
584 werror (E_SIGNED_AND_UNSIGNED_INVALID, noun, name);
586 if (SPEC_SHORT(etype) && SPEC_LONG(etype)) {
588 werror (E_LONG_AND_SHORT_INVALID, noun, name);
593 /*------------------------------------------------------------------*/
594 /* mergeSpec - merges two specifiers and returns the new one */
595 /*------------------------------------------------------------------*/
597 mergeSpec (sym_link * dest, sym_link * src, char *name)
599 if (!IS_SPEC(dest) || !IS_SPEC(src)) {
601 werror (E_INTERNAL_ERROR, __FILE__, __LINE__, "cannot merge declarator");
604 werror (E_SYNTAX_ERROR, yytext);
605 // the show must go on
610 if (SPEC_NOUN(src)) {
611 if (!SPEC_NOUN(dest)) {
612 SPEC_NOUN(dest)=SPEC_NOUN(src);
614 /* we shouldn't redeclare the type */
615 if (getenv("DEBUG_SANITY")) {
616 fprintf (stderr, "mergeSpec: ");
618 werror(E_TWO_OR_MORE_DATA_TYPES, name);
622 if (SPEC_SCLS(src)) {
623 /* if destination has no storage class */
624 if (!SPEC_SCLS (dest) || SPEC_SCLS(dest)==S_REGISTER) {
625 SPEC_SCLS (dest) = SPEC_SCLS (src);
627 if (getenv("DEBUG_SANITY")) {
628 fprintf (stderr, "mergeSpec: ");
630 werror(E_TWO_OR_MORE_STORAGE_CLASSES, name);
634 /* copy all the specifications */
636 // we really should do:
638 if (SPEC_what(src)) {
639 if (SPEC_what(dest)) {
640 werror(W_DUPLICATE_SPEC, "what");
642 SPEC_what(dst)|=SPEC_what(src);
645 // but there are more important thing right now
647 SPEC_LONG (dest) |= SPEC_LONG (src);
648 SPEC_SHORT(dest) |= SPEC_SHORT(src);
649 SPEC_USIGN (dest) |= SPEC_USIGN (src);
650 dest->select.s.b_signed|=src->select.s.b_signed;
651 SPEC_STAT (dest) |= SPEC_STAT (src);
652 SPEC_EXTR (dest) |= SPEC_EXTR (src);
653 SPEC_CONST(dest) |= SPEC_CONST (src);
654 SPEC_ABSA (dest) |= SPEC_ABSA (src);
655 SPEC_VOLATILE (dest) |= SPEC_VOLATILE (src);
656 SPEC_ADDR (dest) |= SPEC_ADDR (src);
657 SPEC_OCLS (dest) = SPEC_OCLS (src);
658 SPEC_BLEN (dest) |= SPEC_BLEN (src);
659 SPEC_BSTR (dest) |= SPEC_BSTR (src);
660 SPEC_TYPEDEF (dest) |= SPEC_TYPEDEF (src);
661 SPEC_ENUM (dest) |= SPEC_ENUM (src);
662 if (SPEC_ARGREG(src) && !SPEC_ARGREG(dest))
663 SPEC_ARGREG(dest) = SPEC_ARGREG(src);
665 if (IS_STRUCT (dest) && SPEC_STRUCT (dest) == NULL)
666 SPEC_STRUCT (dest) = SPEC_STRUCT (src);
668 /* these are the only function attributes that will be set
669 in a specifier while parsing */
670 FUNC_NONBANKED(dest) |= FUNC_NONBANKED(src);
671 FUNC_BANKED(dest) |= FUNC_BANKED(src);
672 FUNC_ISCRITICAL(dest) |= FUNC_ISCRITICAL(src);
673 FUNC_ISREENT(dest) |= FUNC_ISREENT(src);
674 FUNC_ISNAKED(dest) |= FUNC_ISNAKED(src);
675 FUNC_ISISR(dest) |= FUNC_ISISR(src);
676 FUNC_ISJAVANATIVE(dest) |= FUNC_ISJAVANATIVE(src);
677 FUNC_ISBUILTIN(dest) |= FUNC_ISBUILTIN(src);
678 FUNC_ISOVERLAY(dest) |= FUNC_ISOVERLAY(src);
679 FUNC_INTNO(dest) |= FUNC_INTNO(src);
680 FUNC_REGBANK(dest) |= FUNC_REGBANK(src);
685 /*------------------------------------------------------------------*/
686 /* genSymName - generates and returns a name used for anonymous vars */
687 /*------------------------------------------------------------------*/
689 genSymName (int level)
691 static int gCount = 0;
692 static char gname[SDCC_NAME_MAX + 1];
694 SNPRINTF (gname, sizeof(gname), "__%04d%04d", level, gCount++);
698 /*------------------------------------------------------------------*/
699 /* getSpec - returns the specifier part from a declaration chain */
700 /*------------------------------------------------------------------*/
702 getSpec (sym_link * p)
707 while (p && !(IS_SPEC (p)))
713 /*------------------------------------------------------------------*/
714 /* newCharLink() - creates an char type */
715 /*------------------------------------------------------------------*/
721 p = newLink (SPECIFIER);
722 SPEC_NOUN (p) = V_CHAR;
727 /*------------------------------------------------------------------*/
728 /* newFloatLink - a new Float type */
729 /*------------------------------------------------------------------*/
735 p = newLink (SPECIFIER);
736 SPEC_NOUN (p) = V_FLOAT;
741 /*------------------------------------------------------------------*/
742 /* newFixed16x16Link - a new Float type */
743 /*------------------------------------------------------------------*/
749 p = newLink (SPECIFIER);
750 SPEC_NOUN (p) = V_FIXED16X16;
755 /*------------------------------------------------------------------*/
756 /* newLongLink() - new long type */
757 /*------------------------------------------------------------------*/
763 p = newLink (SPECIFIER);
764 SPEC_NOUN (p) = V_INT;
770 /*------------------------------------------------------------------*/
771 /* newIntLink() - creates an int type */
772 /*------------------------------------------------------------------*/
778 p = newLink (SPECIFIER);
779 SPEC_NOUN (p) = V_INT;
784 /*------------------------------------------------------------------*/
785 /* newBoolLink() - creates an bool type */
786 /*------------------------------------------------------------------*/
792 p = newLink (SPECIFIER);
793 SPEC_NOUN (p) = V_BIT;
798 /*------------------------------------------------------------------*/
799 /* getSize - returns size of a type chain in bits */
800 /*------------------------------------------------------------------*/
802 getSize (sym_link * p)
804 /* if nothing return 0 */
808 { /* if this is the specifier then */
809 switch (SPEC_NOUN (p))
810 { /* depending on the specifier type */
812 return (IS_LONG (p) ? LONGSIZE : INTSIZE);
822 return SPEC_STRUCT (p)->size;
829 return ((SPEC_BLEN (p) / 8) + (SPEC_BLEN (p) % 8 ? 1 : 0));
835 /* this is a declarator */
836 switch (DCL_TYPE (p))
840 return DCL_ELEM (p) * getSize (p->next);
842 // werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
843 // "can not tell the size of an array[]");
854 return (IFFUNC_BANKED (p) ? GPTRSIZE : FPTRSIZE);
863 /*---------------------------------------------------------------------*/
864 /* getAllocSize - returns size of a type chain in bytes for allocation */
865 /*---------------------------------------------------------------------*/
867 getAllocSize (sym_link *p)
869 if (IS_STRUCT (p) && SPEC_STRUCT (p)->type == STRUCT)
871 /* if this is a struct specifier then */
872 /* calculate the size as it could end */
873 /* with an array of unspecified length */
874 symbol *sflds = SPEC_STRUCT (p)->fields;
876 while (sflds && sflds->next)
879 if (sflds && !IS_BITFIELD (sflds->type))
880 return sflds->offset + getAllocSize (sflds->type);
882 return SPEC_STRUCT (p)->size;
888 /*------------------------------------------------------------------*/
889 /* bitsForType - returns # of bits required to store this type */
890 /*------------------------------------------------------------------*/
892 bitsForType (sym_link * p)
894 /* if nothing return 0 */
899 { /* if this is the specifier then */
901 switch (SPEC_NOUN (p))
902 { /* depending on the specifier type */
904 return (IS_LONG (p) ? LONGSIZE * 8 : INTSIZE * 8);
906 return FLOATSIZE * 8;
914 return SPEC_STRUCT (p)->size * 8;
921 return SPEC_BLEN (p);
927 /* this is a specifier */
928 switch (DCL_TYPE (p))
931 return DCL_ELEM (p) * getSize (p->next) * 8;
935 return (PTRSIZE * 8);
940 return (FPTRSIZE * 8);
942 return (GPTRSIZE * 8);
949 /*------------------------------------------------------------------*/
950 /* copySymbolChain - copies a symbol chain */
951 /*------------------------------------------------------------------*/
953 copySymbolChain (symbol * src)
960 dest = copySymbol (src);
961 dest->next = copySymbolChain (src->next);
965 /*------------------------------------------------------------------*/
966 /* copySymbol - makes a copy of a symbol */
967 /*------------------------------------------------------------------*/
969 copySymbol (symbol * src)
976 dest = newSymbol (src->name, src->level);
977 memcpy (dest, src, sizeof (symbol));
978 dest->level = src->level;
979 dest->block = src->block;
980 dest->ival = copyIlist (src->ival);
981 dest->type = copyLinkChain (src->type);
982 dest->etype = getSpec (dest->type);
984 dest->key = src->key;
985 dest->allocreq = src->allocreq;
989 /*------------------------------------------------------------------*/
990 /* reverseSyms - reverses the links for a symbol chain */
991 /*------------------------------------------------------------------*/
993 reverseSyms (symbol * sym)
995 symbol *prev, *curr, *next;
1010 sym->next = (void *) NULL;
1014 /*------------------------------------------------------------------*/
1015 /* reverseLink - reverses the links for a type chain */
1016 /*------------------------------------------------------------------*/
1018 reverseLink (sym_link * type)
1020 sym_link *prev, *curr, *next;
1035 type->next = (void *) NULL;
1039 /*------------------------------------------------------------------*/
1040 /* addSymChain - adds a symbol chain to the symboltable */
1041 /*------------------------------------------------------------------*/
1043 addSymChain (symbol ** symHead)
1045 symbol *sym = *symHead;
1046 symbol *csym = NULL;
1050 for (; sym != NULL; sym = sym->next)
1052 changePointer(sym->type);
1053 checkTypeSanity(sym->etype, sym->name);
1055 if (!sym->level && !(IS_SPEC(sym->etype) && IS_TYPEDEF(sym->etype)))
1058 /* if already exists in the symbol table then check if
1059 one of them is an extern definition if yes then
1060 then check if the type match, if the types match then
1061 delete the current entry and add the new entry */
1062 if ((csym = findSymWithLevel (SymbolTab, sym)) &&
1063 csym->level == sym->level) {
1065 /* If the previous definition was for an array with incomplete */
1066 /* type, and the new definition has completed the type, update */
1067 /* the original type to match */
1068 if (IS_DECL(csym->type) && DCL_TYPE(csym->type)==ARRAY
1069 && IS_DECL(sym->type) && DCL_TYPE(sym->type)==ARRAY)
1071 if (!DCL_ELEM(csym->type) && DCL_ELEM(sym->type))
1072 DCL_ELEM(csym->type) = DCL_ELEM(sym->type);
1076 /* If only one of the definitions used the "at" keyword, copy */
1077 /* the address to the other. */
1078 if (IS_SPEC(csym->etype) && SPEC_ABSA(csym->etype)
1079 && IS_SPEC(sym->etype) && !SPEC_ABSA(sym->etype))
1081 SPEC_ABSA (sym->etype) = 1;
1082 SPEC_ADDR (sym->etype) = SPEC_ADDR (csym->etype);
1084 if (IS_SPEC(csym->etype) && !SPEC_ABSA(csym->etype)
1085 && IS_SPEC(sym->etype) && SPEC_ABSA(sym->etype))
1087 SPEC_ABSA (csym->etype) = 1;
1088 SPEC_ADDR (csym->etype) = SPEC_ADDR (sym->etype);
1093 if (csym->ival && sym->ival)
1095 if (compareTypeExact (csym->type, sym->type, sym->level) != 1)
1099 /* one definition extern ? */
1100 if (IS_EXTERN (csym->etype) || IS_EXTERN (sym->etype))
1101 werror (E_EXTERN_MISMATCH, sym->name);
1103 werror (E_DUPLICATE, sym->name);
1104 werrorfl (csym->fileDef, csym->lineDef, E_PREVIOUS_DEF);
1106 fprintf (stderr, "from type '");
1107 printTypeChain (csym->type, stderr);
1108 if (IS_SPEC (csym->etype) && SPEC_ABSA (csym->etype))
1109 fprintf(stderr, " at 0x%x", SPEC_ADDR (csym->etype));
1110 fprintf (stderr, "'\nto type '");
1111 printTypeChain (sym->type, stderr);
1112 if (IS_SPEC (sym->etype) && SPEC_ABSA (sym->etype))
1113 fprintf(stderr, " at 0x%x", SPEC_ADDR (sym->etype));
1114 fprintf (stderr, "'\n");
1119 if (csym->ival && !sym->ival)
1120 sym->ival = csym->ival;
1122 /* delete current entry */
1123 deleteSym (SymbolTab, csym, csym->name);
1124 deleteFromSeg(csym);
1126 symPtrPtr = symHead;
1127 while (*symPtrPtr && *symPtrPtr != csym)
1128 symPtrPtr = &(*symPtrPtr)->next;
1129 if (*symPtrPtr == csym)
1130 *symPtrPtr = csym->next;
1135 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
1140 /*------------------------------------------------------------------*/
1141 /* funcInChain - DCL Type 'FUNCTION' found in type chain */
1142 /*------------------------------------------------------------------*/
1144 funcInChain (sym_link * lnk)
1155 /*------------------------------------------------------------------*/
1156 /* structElemType - returns the type info of a struct member */
1157 /*------------------------------------------------------------------*/
1159 structElemType (sym_link * stype, value * id)
1161 symbol *fields = (SPEC_STRUCT (stype) ? SPEC_STRUCT (stype)->fields : NULL);
1162 sym_link *type, *etype;
1163 sym_link *petype = getSpec (stype);
1167 /* look for the id */
1170 if (strcmp (fields->rname, id->name) == 0)
1172 type = copyLinkChain (fields->type);
1173 etype = getSpec (type);
1174 SPEC_SCLS (etype) = (SPEC_SCLS (petype) == S_REGISTER ?
1175 SPEC_SCLS (etype) : SPEC_SCLS (petype));
1177 SPEC_CONST (type) |= SPEC_CONST (stype);
1179 DCL_PTR_CONST (type) |= SPEC_CONST (stype);
1182 fields = fields->next;
1186 werror (E_NOT_MEMBER, id->name);
1188 // the show must go on
1189 return newIntLink();
1192 /*------------------------------------------------------------------*/
1193 /* getStructElement - returns element of a tructure definition */
1194 /*------------------------------------------------------------------*/
1196 getStructElement (structdef * sdef, symbol * sym)
1200 for (field = sdef->fields; field; field = field->next)
1201 if (strcmp (field->name, sym->name) == 0)
1204 werror (E_NOT_MEMBER, sym->name);
1206 return sdef->fields;
1209 /*------------------------------------------------------------------*/
1210 /* compStructSize - computes the size of a structure */
1211 /*------------------------------------------------------------------*/
1213 compStructSize (int su, structdef * sdef)
1215 int sum = 0, usum = 0;
1219 /* for the identifiers */
1220 loop = sdef->fields;
1223 /* create the internal name for this variable */
1224 SNPRINTF (loop->rname, sizeof(loop->rname), "_%s", loop->name);
1229 SPEC_VOLATILE (loop->etype) |= (su == UNION ? 1 : 0);
1231 /* if this is a bit field */
1234 /* change it to a unsigned bit */
1235 SPEC_NOUN (loop->etype) = V_BITFIELD;
1236 if (TARGET_IS_PIC16 || TARGET_IS_PIC) {
1237 /* PIC users requested signed bitfields as well */
1239 SPEC_USIGN (loop->etype) = 1;
1241 SPEC_BLEN (loop->etype) = loop->bitVar;
1243 if (loop->bitVar == BITVAR_PAD) {
1244 /* A zero length bitfield forces padding */
1245 SPEC_BSTR (loop->etype) = bitOffset;
1246 SPEC_BLEN (loop->etype) = 0;
1251 if (bitOffset == 8) {
1255 /* check if this fit into the remaining */
1256 /* bits of this byte else align it to the */
1257 /* next byte boundary */
1258 if (loop->bitVar <= (8 - bitOffset)) {
1259 /* fits into current byte */
1261 SPEC_BSTR (loop->etype) = bitOffset;
1262 bitOffset += loop->bitVar;
1264 else if (!bitOffset) {
1265 /* does not fit, but is already byte aligned */
1267 SPEC_BSTR (loop->etype) = bitOffset;
1268 bitOffset += loop->bitVar;
1271 /* does not fit; need to realign first */
1273 loop->offset = (su == UNION ? sum = 0 : sum);
1275 SPEC_BSTR (loop->etype) = bitOffset;
1276 bitOffset += loop->bitVar;
1278 while (bitOffset>8) {
1285 /* This is a non-bit field. Make sure we are */
1286 /* byte aligned first */
1289 loop->offset = (su == UNION ? sum = 0 : sum);
1293 checkDecl (loop, 1);
1294 sum += getSize (loop->type);
1299 /* if union then size = sizeof largest field */
1301 /* For UNION, round up after each field */
1302 sum += ((bitOffset+7)/8);
1303 usum = max (usum, sum);
1308 /* For STRUCT, round up after all fields processed */
1310 sum += ((bitOffset+7)/8);
1312 return (su == UNION ? usum : sum);
1315 /*-------------------------------------------------------------------*/
1316 /* promoteAnonStructs - promote anonymous struct/union's fields into */
1317 /* an enclosing struct/union */
1318 /*-------------------------------------------------------------------*/
1320 promoteAnonStructs (int su, structdef * sdef)
1329 tofield = &sdef->fields;
1330 field = sdef->fields;
1333 nextfield = field->next;
1334 if (!*field->name && IS_STRUCT (field->type))
1336 /* Found an anonymous struct/union. Replace it */
1337 /* with the fields it contains and adjust all */
1340 base = field->offset;
1341 subfield = copySymbolChain (SPEC_STRUCT (field->type)->fields);
1343 continue; /* just in case it's empty */
1345 *tofield = subfield;
1348 /* check for field name conflicts resulting from promotion */
1349 dupfield = sdef->fields;
1350 while (dupfield && dupfield != subfield)
1352 if (*subfield->name && !strcmp (dupfield->name, subfield->name))
1354 werrorfl (subfield->fileDef, subfield->lineDef,
1356 su==STRUCT ? "struct" : "union",
1358 werrorfl (dupfield->fileDef, dupfield->lineDef,
1361 dupfield = dupfield->next;
1364 subfield->offset += base;
1366 subfield = subfield->next;
1370 subfield->next = nextfield;
1371 tofield = &subfield->next;
1374 tofield = &field->next;
1380 /*------------------------------------------------------------------*/
1381 /* checkSClass - check the storage class specification */
1382 /*------------------------------------------------------------------*/
1384 checkSClass (symbol * sym, int isProto)
1388 if (getenv("DEBUG_SANITY")) {
1389 fprintf (stderr, "checkSClass: %s \n", sym->name);
1392 /* type is literal can happen for enums change
1394 if (SPEC_SCLS (sym->etype) == S_LITERAL && !SPEC_ENUM (sym->etype))
1395 SPEC_SCLS (sym->etype) = S_AUTO;
1397 /* if sfr or sbit then must also be volatile */
1398 if (SPEC_SCLS (sym->etype) == S_SBIT ||
1399 SPEC_SCLS (sym->etype) == S_SFR)
1401 SPEC_VOLATILE (sym->etype) = 1;
1404 /* if absolute address given then it mark it as
1405 volatile -- except in the PIC port */
1407 #if !OPT_DISABLE_PIC || !OPT_DISABLE_PIC16
1408 /* The PIC port uses a different peep hole optimizer based on "pCode" */
1409 if (!TARGET_IS_PIC && !TARGET_IS_PIC16)
1412 if (IS_ABSOLUTE (sym->etype))
1413 SPEC_VOLATILE (sym->etype) = 1;
1415 if (TARGET_IS_MCS51 &&
1416 IS_ABSOLUTE (sym->etype) &&
1417 SPEC_SCLS (sym->etype) == S_SFR)
1422 if (SPEC_NOUN (sym->etype) == V_CHAR)
1424 else if (SPEC_LONG (sym->etype) == 0)
1429 addr = SPEC_ADDR (sym->etype);
1430 for (n=0; n<size; n+=8)
1431 if (((addr >> n) & 0xFF) < 0x80)
1432 werror (W_SFR_ABSRANGE, sym->name);
1435 /* If code memory is read only, then pointers to code memory */
1436 /* implicitly point to constants -- make this explicit */
1438 while (t && t->next) {
1439 if (IS_CODEPTR(t) && port->mem.code_ro) {
1440 if (IS_SPEC(t->next)) {
1441 SPEC_CONST (t->next) = 1;
1443 DCL_PTR_CONST (t->next) = 1;
1449 /* global variables declared const put into code */
1450 /* if no other storage class specified */
1451 if (sym->level == 0 &&
1452 SPEC_SCLS(sym->etype) == S_FIXED &&
1453 !IS_FUNC(sym->type)) {
1454 /* find the first non-array link */
1458 if (IS_CONSTANT (t)) {
1459 SPEC_SCLS (sym->etype) = S_CODE;
1463 /* global variable in code space is a constant */
1464 if (sym->level == 0 &&
1465 SPEC_SCLS (sym->etype) == S_CODE &&
1466 port->mem.code_ro) {
1467 /* find the first non-array link */
1474 DCL_PTR_CONST (t) = 1;
1478 /* if bit variable then no storage class can be */
1479 /* specified since bit is already a storage */
1480 if (IS_BITVAR (sym->etype) &&
1481 (SPEC_SCLS (sym->etype) != S_FIXED &&
1482 SPEC_SCLS (sym->etype) != S_SBIT &&
1483 SPEC_SCLS (sym->etype) != S_BIT)
1486 werror (E_BITVAR_STORAGE, sym->name);
1487 SPEC_SCLS (sym->etype) = S_FIXED;
1490 /* extern variables cannot be initialized */
1491 if (IS_EXTERN (sym->etype) && sym->ival)
1493 werror (E_EXTERN_INIT, sym->name);
1497 /* if this is an automatic symbol */
1498 if (sym->level && (options.stackAuto || reentrant)) {
1499 if (SPEC_SCLS (sym->etype) != S_BIT) {
1500 if ((SPEC_SCLS (sym->etype) == S_AUTO ||
1501 SPEC_SCLS (sym->etype) == S_FIXED ||
1502 SPEC_SCLS (sym->etype) == S_REGISTER ||
1503 SPEC_SCLS (sym->etype) == S_STACK ||
1504 SPEC_SCLS (sym->etype) == S_XSTACK)) {
1505 SPEC_SCLS (sym->etype) = S_AUTO;
1507 /* storage class may only be specified for statics */
1508 if (!IS_STATIC(sym->etype)) {
1509 werror (E_AUTO_ASSUMED, sym->name);
1515 /* automatic symbols cannot be given */
1516 /* an absolute address ignore it */
1518 SPEC_ABSA (sym->etype) &&
1519 (options.stackAuto || reentrant))
1521 werror (E_AUTO_ABSA, sym->name);
1522 SPEC_ABSA (sym->etype) = 0;
1525 /* arrays & pointers cannot be defined for bits */
1526 /* SBITS or SFRs or BIT */
1527 if ((IS_ARRAY (sym->type) || IS_PTR (sym->type)) &&
1528 !IS_FUNCPTR (sym->type) &&
1529 (SPEC_NOUN (sym->etype) == V_BIT ||
1530 SPEC_NOUN (sym->etype) == V_SBIT ||
1531 SPEC_NOUN (sym->etype) == V_BITFIELD ||
1532 SPEC_SCLS (sym->etype) == S_SFR))
1533 werror (E_BIT_ARRAY, sym->name);
1535 /* if this is a bit|sbit then set length & start */
1536 if (SPEC_NOUN (sym->etype) == V_BIT ||
1537 SPEC_NOUN (sym->etype) == V_SBIT)
1539 SPEC_BLEN (sym->etype) = 1;
1540 SPEC_BSTR (sym->etype) = 0;
1544 /* variables declared in CODE space must have */
1545 /* initializers if not an extern */
1546 if (SPEC_SCLS (sym->etype) == S_CODE &&
1547 sym->ival == NULL &&
1550 port->mem.code_ro &&
1551 !IS_EXTERN (sym->etype) &&
1552 !funcInChain (sym->type))
1553 werror (E_CODE_NO_INIT, sym->name);
1556 /* if parameter or local variable then change */
1557 /* the storage class to reflect where the var will go */
1558 if (sym->level && SPEC_SCLS (sym->etype) == S_FIXED
1559 && !IS_STATIC(sym->etype)
1562 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
1564 SPEC_SCLS (sym->etype) = (options.useXstack ?
1565 S_XSTACK : S_STACK);
1569 /* hack-o-matic! I see no reason why the useXstack option should ever
1570 * control this allocation, but the code was originally that way, and
1571 * changing it for non-390 ports breaks the compiler badly.
1573 bool useXdata = (TARGET_IS_DS390 || TARGET_IS_DS400) ?
1574 1 : options.useXstack;
1575 SPEC_SCLS (sym->etype) = (useXdata ?
1581 /*------------------------------------------------------------------*/
1582 /* changePointer - change pointer to functions */
1583 /*------------------------------------------------------------------*/
1585 changePointer (sym_link * p)
1588 /* go thru the chain of declarations */
1589 /* if we find a pointer to a function */
1590 /* change it to a ptr to code area */
1591 /* unless the function is banked. */
1592 for (; p; p = p->next)
1594 if (!IS_SPEC (p) && DCL_TYPE (p) == UPOINTER)
1595 DCL_TYPE (p) = port->unqualified_pointer;
1596 if (IS_PTR (p) && IS_FUNC (p->next))
1597 if (!IFFUNC_BANKED(p->next))
1598 DCL_TYPE (p) = CPOINTER;
1602 /*------------------------------------------------------------------*/
1603 /* checkDecl - does semantic validation of a declaration */
1604 /*------------------------------------------------------------------*/
1606 checkDecl (symbol * sym, int isProto)
1609 checkSClass (sym, isProto); /* check the storage class */
1610 changePointer (sym->type); /* change pointers if required */
1612 /* if this is an array without any dimension
1613 then update the dimension from the initial value */
1614 if (IS_ARRAY (sym->type) && !DCL_ELEM (sym->type))
1615 DCL_ELEM (sym->type) = getNelements (sym->type, sym->ival);
1620 /*------------------------------------------------------------------*/
1621 /* copyLinkChain - makes a copy of the link chain & rets ptr 2 head */
1622 /*------------------------------------------------------------------*/
1624 copyLinkChain (sym_link * p)
1626 sym_link *head, *curr, *loop;
1629 head = loop = (curr ? newLink (p->class) : (void *) NULL);
1632 memcpy (loop, curr, sizeof (sym_link)); /* copy it */
1633 loop->next = (curr->next ? newLink (curr->next->class) : (void *) NULL);
1641 /*------------------------------------------------------------------*/
1642 /* cleanUpBlock - cleansup the symbol table specified for all the */
1643 /* symbols in the given block */
1644 /*------------------------------------------------------------------*/
1646 cleanUpBlock (bucket ** table, int block)
1651 /* go thru the entire table */
1652 for (i = 0; i < 256; i++)
1654 for (chain = table[i]; chain; chain = chain->next)
1656 if (chain->block >= block)
1658 deleteSym (table, chain->sym, chain->name);
1664 /*------------------------------------------------------------------*/
1665 /* cleanUpLevel - cleansup the symbol table specified for all the */
1666 /* symbols in the given level */
1667 /*------------------------------------------------------------------*/
1669 cleanUpLevel (bucket ** table, int level)
1674 /* go thru the entire table */
1675 for (i = 0; i < 256; i++)
1677 for (chain = table[i]; chain; chain = chain->next)
1679 if (chain->level >= level)
1681 deleteSym (table, chain->sym, chain->name);
1687 /*------------------------------------------------------------------*/
1688 /* computeTypeOr - computes the resultant type from two types */
1689 /*------------------------------------------------------------------*/
1691 computeTypeOr (sym_link * etype1, sym_link * etype2, sym_link * reType)
1694 assert ( (IS_CHAR (etype1) || IS_BIT (etype1))
1695 && (IS_CHAR (etype2) || IS_BIT (etype2)));
1697 if (SPEC_USIGN (etype1) == SPEC_USIGN (etype2))
1699 SPEC_USIGN (reType) = SPEC_USIGN (etype1);
1703 if (SPEC_USIGN (etype1))
1705 if ( IS_LITERAL (etype2)
1706 && floatFromVal (valFromType (etype2)) >= 0)
1707 SPEC_USIGN (reType) = 1;
1710 /* promote to int */
1711 SPEC_USIGN (reType) = 0;
1712 SPEC_NOUN (reType) = V_INT;
1715 else /* etype1 signed */
1717 if ( IS_LITERAL (etype2)
1718 && floatFromVal (valFromType (etype2)) <= 127)
1719 SPEC_USIGN (reType) = 0;
1722 /* promote to int */
1723 SPEC_USIGN (reType) = 0;
1724 SPEC_NOUN (reType) = V_INT;
1728 if (SPEC_USIGN (etype2))
1730 if ( IS_LITERAL (etype1)
1731 && floatFromVal (valFromType (etype1)) >= 0)
1732 SPEC_USIGN (reType) = 1;
1735 /* promote to int */
1736 SPEC_USIGN (reType) = 0;
1737 SPEC_NOUN (reType) = V_INT;
1740 else /* etype2 signed */
1742 if ( IS_LITERAL (etype1)
1743 && floatFromVal (valFromType (etype1)) <= 127)
1744 SPEC_USIGN (reType) = 0;
1747 /* promote to int */
1748 SPEC_USIGN (reType) = 0;
1749 SPEC_NOUN (reType) = V_INT;
1755 /*------------------------------------------------------------------*/
1756 /* computeType - computes the resultant type from two types */
1757 /*------------------------------------------------------------------*/
1759 computeType (sym_link * type1, sym_link * type2,
1760 RESULT_TYPE resultType, int op)
1764 sym_link *etype1 = getSpec (type1);
1767 etype2 = type2 ? getSpec (type2) : type1;
1769 /* if one of them is a float then result is a float */
1770 /* here we assume that the types passed are okay */
1771 /* and can be cast to one another */
1772 /* which ever is greater in size */
1773 if (IS_FLOAT (etype1) || IS_FLOAT (etype2))
1774 rType = newFloatLink ();
1776 /* if both are fixed16x16 then result is float */
1777 if (IS_FIXED16X16(etype1) && IS_FIXED16X16(etype2))
1778 rType = newFixed16x16Link();
1780 if (IS_FIXED16X16(etype1) && IS_FLOAT (etype2))
1781 rType = newFloatLink ();
1782 if (IS_FLOAT (etype1) && IS_FIXED16X16 (etype2) )
1783 rType = newFloatLink ();
1785 /* if both are bitvars choose the larger one */
1786 if (IS_BITVAR (etype1) && IS_BITVAR (etype2))
1788 rType = SPEC_BLEN (etype1) >= SPEC_BLEN (etype2) ?
1789 copyLinkChain (type1) : copyLinkChain (type1);
1791 /* if only one of them is a bit variable
1792 then the other one prevails */
1793 else if (IS_BITVAR (etype1) && !IS_BITVAR (etype2))
1795 rType = copyLinkChain (type2);
1796 /* bitfield can have up to 16 bits */
1797 if (getSize (etype1) > 1)
1798 SPEC_NOUN (getSpec (rType)) = V_INT;
1800 else if (IS_BITVAR (etype2) && !IS_BITVAR (etype1))
1802 rType = copyLinkChain (type1);
1803 /* bitfield can have up to 16 bits */
1804 if (getSize (etype2) > 1)
1805 SPEC_NOUN (getSpec (rType)) = V_INT;
1808 /* if one of them is a pointer or array then that
1810 if (IS_PTR (type1) || IS_ARRAY (type1))
1811 rType = copyLinkChain (type1);
1812 else if (IS_PTR (type2) || IS_ARRAY (type2))
1813 rType = copyLinkChain (type2);
1814 else if (getSize (type1) > getSize (type2))
1815 rType = copyLinkChain (type1);
1817 rType = copyLinkChain (type2);
1819 reType = getSpec (rType);
1821 /* avoid conflicting types */
1822 reType->select.s.b_signed = 0;
1824 /* if result is a literal then make not so */
1825 if (IS_LITERAL (reType))
1826 SPEC_SCLS (reType) = S_REGISTER;
1830 case RESULT_TYPE_CHAR:
1831 if (IS_BITVAR (reType))
1833 SPEC_NOUN (reType) = V_CHAR;
1834 SPEC_SCLS (reType) = 0;
1835 SPEC_USIGN (reType) = 0;
1839 case RESULT_TYPE_INT:
1840 case RESULT_TYPE_NONE:
1841 case RESULT_TYPE_OTHER:
1842 if (IS_BIT (reType))
1844 SPEC_NOUN (reType) = V_CHAR;
1845 SPEC_SCLS (reType) = 0;
1846 SPEC_USIGN (reType) = 0;
1849 else if (IS_BITFIELD (reType))
1851 /* could be smarter, but it depends on the op */
1852 /* this is for the worst case: a multiplication of 4 * 4 bit */
1853 SPEC_NOUN (reType) = SPEC_BLEN (reType) <= 4 ? V_CHAR : V_INT;
1854 SPEC_SCLS (reType) = 0;
1855 SPEC_USIGN (reType) = 0;
1858 else if (IS_CHAR (reType))
1860 if (op == '|' || op == '^')
1861 return computeTypeOr (etype1, etype2, reType);
1863 && SPEC_USIGN (etype1) != SPEC_USIGN (etype2))
1865 SPEC_USIGN (reType) = 1;
1870 SPEC_NOUN (reType) = V_INT;
1871 SPEC_USIGN (reType) = 0;
1874 /* TODO: should be in SDCCast.c */
1876 && ( !SPEC_USIGN (etype1)
1877 || !SPEC_USIGN (etype2)))
1879 SPEC_NOUN (reType) = V_INT;
1880 SPEC_USIGN (reType) = 0;
1889 /* SDCC's sign promotion:
1890 - if one or both operands are unsigned, the resultant type will be unsigned
1891 (except char, see below)
1892 - if an operand is promoted to a larger type (char -> int, int -> long),
1893 the larger type will be signed
1895 SDCC tries hard to avoid promotion to int and does 8 bit calculation as
1896 much as possible. We're leaving ISO IEC 9899 here and have to extrapolate
1897 the standard. The standard demands, that the result has to be the same
1898 "as if" the promotion would have been performed:
1900 - if the result of an operation with two char's is promoted to a
1901 larger type, the result will be signed.
1903 More sophisticated are these:
1904 - if the result of an operation with two char's is a char again,
1905 the result will only then be unsigned, if both operands are
1906 unsigned. In all other cases the result will be signed.
1908 This seems to be contradictionary to the first two rules, but it makes
1909 real sense (all types are char's):
1911 A signed char can be negative; this must be preserved in the result
1914 Only if both operands are unsigned it's safe to make the result
1915 unsigned; this helps to avoid overflow:
1918 - ToDo: document '|', '^' and '&'
1920 Homework: - why is (200 * 200 < 0) true?
1921 - why is { char l = 200, r = 200; (r * l > 0) } true?
1924 if (!IS_FLOAT (reType)
1925 && ( (SPEC_USIGN (etype1)
1926 /* if this operand is promoted to a larger type,
1927 then it will be promoted to a signed type */
1928 && !(getSize (etype1) < getSize (reType))
1929 /* char require special handling */
1930 && !IS_CHAR (etype1))
1931 || /* same for 2nd operand */
1932 (SPEC_USIGN (etype2)
1933 && !(getSize (etype2) < getSize (reType))
1934 && !IS_CHAR (etype2))
1935 || /* if both are 'unsigned char' and not promoted
1936 let the result be unsigned too */
1937 ( SPEC_USIGN (etype1)
1938 && SPEC_USIGN (etype2)
1941 && IS_CHAR (reType))))
1942 SPEC_USIGN (reType) = 1;
1944 SPEC_USIGN (reType) = 0;
1949 /*--------------------------------------------------------------------*/
1950 /* compareType - will do type check return 1 if match, -1 if castable */
1951 /*--------------------------------------------------------------------*/
1953 compareType (sym_link * dest, sym_link * src)
1964 /* if dest is a declarator then */
1969 /* banked function pointer */
1970 if (IS_GENPTR (dest) && IS_GENPTR (src))
1972 if (IS_FUNC (src->next) && IS_VOID(dest->next))
1974 if (IS_FUNC (dest->next) && IS_VOID(src->next))
1976 return compareType (dest->next, src->next);
1979 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
1981 //checkFunction(src,dest);
1983 return compareType (dest->next, src->next);
1985 if (IS_PTR (dest) && IS_GENPTR (src) && IS_VOID(src->next)) {
1989 (IS_GENPTR (dest) ||
1990 ((DCL_TYPE(src) == POINTER) && (DCL_TYPE(dest) == IPOINTER))
1993 if (IS_PTR (dest) && IS_ARRAY (src)) {
1994 value *val=aggregateToPointer (valFromType(src));
1995 int res=compareType (dest, val->type);
1996 Safe_free(val->type);
2000 if (IS_PTR (dest) && IS_FUNC (dest->next) && IS_FUNC (src))
2001 return compareType (dest->next, src);
2004 else if (IS_PTR (dest) && IS_INTEGRAL (src))
2010 /* if one is a specifier and the other is not */
2011 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
2012 (IS_SPEC (dest) && !IS_SPEC (src)))
2015 /* if one of them is a void then ok */
2016 if (SPEC_NOUN (dest) == V_VOID &&
2017 SPEC_NOUN (src) != V_VOID)
2020 if (SPEC_NOUN (dest) != V_VOID &&
2021 SPEC_NOUN (src) == V_VOID)
2024 /* if they are both bitfields then if the lengths
2025 and starts don't match */
2026 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
2027 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
2028 SPEC_BSTR (dest) != SPEC_BSTR (src)))
2031 /* it is a specifier */
2032 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
2034 if (SPEC_USIGN (dest) == SPEC_USIGN (src) &&
2035 IS_INTEGRAL (dest) && IS_INTEGRAL (src) &&
2037 bitsForType (dest) == bitsForType (src))
2038 instead of the next two lines, but the regression tests fail with
2039 them; I guess it's a problem with replaceCheaperOp */
2040 getSize (dest) == getSize (src) &&
2041 !(!IS_BIT (dest) && IS_BIT (src)))
2043 else if (IS_ARITHMETIC (dest) && IS_ARITHMETIC (src))
2048 else if (IS_STRUCT (dest))
2050 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
2055 if (SPEC_LONG (dest) != SPEC_LONG (src))
2058 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
2064 /*--------------------------------------------------------------------*/
2065 /* compareTypeExact - will do type check return 1 if match exactly */
2066 /*--------------------------------------------------------------------*/
2068 compareTypeExact (sym_link * dest, sym_link * src, int level)
2070 STORAGE_CLASS srcScls, destScls;
2081 /* if dest is a declarator then */
2086 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
2087 if ((DCL_TYPE (src) == ARRAY) && (DCL_ELEM (src) != DCL_ELEM (dest)))
2089 if (DCL_PTR_CONST (src) != DCL_PTR_CONST (dest))
2091 if (DCL_PTR_VOLATILE (src) != DCL_PTR_VOLATILE (dest))
2095 value *exargs, *acargs, *checkValue;
2097 /* verify function return type */
2098 if (!compareTypeExact (dest->next, src->next, -1))
2100 if (FUNC_ISISR (dest) != FUNC_ISISR (src))
2102 if (FUNC_REGBANK (dest) != FUNC_REGBANK (src))
2104 if (IFFUNC_ISNAKED (dest) != IFFUNC_ISNAKED (src))
2107 if (IFFUNC_ISREENT (dest) != IFFUNC_ISREENT (src) && argCnt>1)
2111 /* compare expected args with actual args */
2112 exargs = FUNC_ARGS(dest);
2113 acargs = FUNC_ARGS(src);
2115 /* for all the expected args do */
2116 for (; exargs && acargs; exargs = exargs->next, acargs = acargs->next)
2118 //checkTypeSanity(acargs->etype, acargs->name);
2120 if (IS_AGGREGATE (acargs->type))
2122 checkValue = copyValue (acargs);
2123 aggregateToPointer (checkValue);
2126 checkValue = acargs;
2129 if (!compareTypeExact (exargs->type, checkValue->type, -1))
2134 /* if one them ended we have a problem */
2135 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2136 (!exargs && acargs && !IS_VOID (acargs->type)))
2140 return compareTypeExact (dest->next, src->next, level);
2147 /* if one is a specifier and the other is not */
2148 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
2149 (IS_SPEC (dest) && !IS_SPEC (src)))
2152 /* if one of them is a void then ok */
2153 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
2156 /* if they are both bitfields then if the lengths
2157 and starts don't match */
2158 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
2159 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
2160 SPEC_BSTR (dest) != SPEC_BSTR (src)))
2163 if (IS_INTEGRAL (dest))
2165 /* signedness must match */
2166 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
2168 /* size must match */
2169 if (SPEC_LONG (dest) != SPEC_LONG (src))
2171 if (SPEC_SHORT (dest) != SPEC_SHORT (src))
2175 if (IS_STRUCT (dest))
2177 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
2181 if (SPEC_CONST (dest) != SPEC_CONST (src))
2183 if (SPEC_VOLATILE (dest) != SPEC_VOLATILE (src))
2185 if (SPEC_STAT (dest) != SPEC_STAT (src))
2187 if (SPEC_ABSA (dest) != SPEC_ABSA (src))
2189 if (SPEC_ABSA (dest) && SPEC_ADDR (dest) != SPEC_ADDR (src))
2192 destScls = SPEC_SCLS (dest);
2193 srcScls = SPEC_SCLS (src);
2195 /* Compensate for const to const code change in checkSClass() */
2196 if (!level & port->mem.code_ro && SPEC_CONST (dest))
2198 if (srcScls == S_CODE && destScls == S_FIXED)
2200 if (destScls == S_CODE && srcScls == S_FIXED)
2204 /* compensate for allocGlobal() */
2205 if ((srcScls == S_FIXED || srcScls == S_AUTO)
2206 && port->mem.default_globl_map == xdata
2210 if (level>0 && !SPEC_STAT (dest))
2212 /* Compensate for hack-o-matic in checkSClass() */
2213 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
2215 if (destScls == S_FIXED)
2216 destScls = (options.useXstack ? S_XSTACK : S_STACK);
2217 if (srcScls == S_FIXED)
2218 srcScls = (options.useXstack ? S_XSTACK : S_STACK);
2220 else if (TARGET_IS_DS390 || TARGET_IS_DS400 || options.useXstack)
2222 if (destScls == S_FIXED)
2224 if (srcScls == S_FIXED)
2229 if (srcScls != destScls)
2232 printf ("level = %d\n", level);
2233 printf ("SPEC_SCLS (src) = %d, SPEC_SCLS (dest) = %d\n",
2234 SPEC_SCLS (src), SPEC_SCLS (dest));
2235 printf ("srcScls = %d, destScls = %d\n",srcScls, destScls);
2243 /*------------------------------------------------------------------*/
2244 /* inCalleeSaveList - return 1 if found in callee save list */
2245 /*------------------------------------------------------------------*/
2247 calleeCmp(void *p1, void *p2)
2249 return (strcmp((char *)p1, (char *)(p2)) == 0);
2253 inCalleeSaveList(char *s)
2255 if (options.all_callee_saves)
2257 return isinSetWith(options.calleeSavesSet, s, calleeCmp);
2260 /*-----------------------------------------------------------------*/
2261 /* aggregateToPointer: change an agggregate type function */
2262 /* argument to a pointer to that type. */
2263 /*-----------------------------------------------------------------*/
2265 aggregateToPointer (value * val)
2267 if (IS_AGGREGATE (val->type))
2269 /* if this is a structure */
2270 /* then we need to add a new link */
2271 if (IS_STRUCT (val->type))
2273 /* first lets add DECLARATOR type */
2274 sym_link *p = val->type;
2276 werror (W_STRUCT_AS_ARG, val->name);
2277 val->type = newLink (DECLARATOR);
2278 val->type->next = p;
2281 /* change to a pointer depending on the */
2282 /* storage class specified */
2283 switch (SPEC_SCLS (val->etype))
2286 DCL_TYPE (val->type) = IPOINTER;
2289 DCL_TYPE (val->type) = PPOINTER;
2292 if (SPEC_OCLS(val->etype)) {
2293 DCL_TYPE(val->type)=PTR_TYPE(SPEC_OCLS(val->etype));
2295 // this happens for (external) function parameters
2296 DCL_TYPE (val->type) = port->unqualified_pointer;
2302 DCL_TYPE (val->type) = POINTER;
2305 DCL_TYPE (val->type) = CPOINTER;
2308 DCL_TYPE (val->type) = FPOINTER;
2311 DCL_TYPE (val->type) = EEPPOINTER;
2314 DCL_TYPE (val->type) = port->unqualified_pointer;
2317 /* is there is a symbol associated then */
2318 /* change the type of the symbol as well */
2321 val->sym->type = copyLinkChain (val->type);
2322 val->sym->etype = getSpec (val->sym->type);
2327 /*------------------------------------------------------------------*/
2328 /* checkFunction - does all kinds of check on a function */
2329 /*------------------------------------------------------------------*/
2331 checkFunction (symbol * sym, symbol *csym)
2333 value *exargs, *acargs;
2337 if (getenv("DEBUG_SANITY")) {
2338 fprintf (stderr, "checkFunction: %s ", sym->name);
2341 if (!IS_DECL(sym->type) || DCL_TYPE(sym->type)!=FUNCTION)
2343 werror(E_SYNTAX_ERROR, sym->name);
2347 /* make sure the type is complete and sane */
2348 checkTypeSanity(((symbol *)sym)->etype, ((symbol *)sym)->name);
2350 /* if not type then some kind of error */
2354 /* if the function has no type then make it return int */
2355 if (!sym->type->next)
2356 sym->type->next = sym->etype = newIntLink ();
2358 /* function cannot return aggregate */
2359 if (IS_AGGREGATE (sym->type->next))
2361 werror (E_FUNC_AGGR, sym->name);
2365 /* check if this function is defined as calleeSaves
2366 then mark it as such */
2367 FUNC_CALLEESAVES(sym->type) = inCalleeSaveList (sym->name);
2369 /* if interrupt service routine */
2370 /* then it cannot have arguments */
2371 if (IFFUNC_ARGS(sym->type) && FUNC_ISISR (sym->type))
2373 if (!IS_VOID(FUNC_ARGS(sym->type)->type)) {
2374 werror (E_INT_ARGS, sym->name);
2375 FUNC_ARGS(sym->type)=NULL;
2379 if (IFFUNC_ISSHADOWREGS(sym->type) && !FUNC_ISISR (sym->type))
2381 werror (E_SHADOWREGS_NO_ISR, sym->name);
2385 for (argCnt=1, acargs = FUNC_ARGS(sym->type);
2387 acargs=acargs->next, argCnt++) {
2389 // this can happen for reentrant functions
2390 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2391 // the show must go on: synthesize a name and symbol
2392 SNPRINTF (acargs->name, sizeof(acargs->name), "_%s_PARM_%d", sym->name, argCnt);
2393 acargs->sym = newSymbol (acargs->name, 1);
2394 SPEC_OCLS (acargs->etype) = istack;
2395 acargs->sym->type = copyLinkChain (acargs->type);
2396 acargs->sym->etype = getSpec (acargs->sym->type);
2397 acargs->sym->_isparm = 1;
2398 strncpyz (acargs->sym->rname, acargs->name, sizeof(acargs->sym->rname));
2399 } else if (strcmp(acargs->sym->name, acargs->sym->rname)==0) {
2401 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2406 if (!csym && !(csym = findSym (SymbolTab, sym, sym->name)))
2407 return 1; /* not defined nothing more to check */
2409 /* check if body already present */
2410 if (csym && IFFUNC_HASBODY(csym->type))
2412 werror (E_FUNC_BODY, sym->name);
2416 /* check the return value type */
2417 if (compareType (csym->type, sym->type) <= 0)
2419 werror (E_PREV_DEF_CONFLICT, csym->name, "type");
2420 printFromToType(csym->type, sym->type);
2424 if (FUNC_ISISR (csym->type) != FUNC_ISISR (sym->type))
2426 werror (E_PREV_DEF_CONFLICT, csym->name, "interrupt");
2429 /* I don't think this is necessary for interrupts. An isr is a */
2430 /* root in the calling tree. */
2431 if ((FUNC_REGBANK (csym->type) != FUNC_REGBANK (sym->type)) &&
2432 (!FUNC_ISISR (sym->type)))
2434 werror (E_PREV_DEF_CONFLICT, csym->name, "using");
2437 if (IFFUNC_ISNAKED (csym->type) != IFFUNC_ISNAKED (sym->type))
2439 werror (E_PREV_DEF_CONFLICT, csym->name, "_naked");
2442 /* Really, reentrant should match regardless of argCnt, but */
2443 /* this breaks some existing code (the fp lib functions). If */
2444 /* the first argument is always passed the same way, this */
2445 /* lax checking is ok (but may not be true for in future ports) */
2446 if (IFFUNC_ISREENT (csym->type) != IFFUNC_ISREENT (sym->type)
2449 //printf("argCnt = %d\n",argCnt);
2450 werror (E_PREV_DEF_CONFLICT, csym->name, "reentrant");
2453 if (IFFUNC_ISWPARAM (csym->type) != IFFUNC_ISWPARAM (sym->type))
2455 werror (E_PREV_DEF_CONFLICT, csym->name, "wparam");
2458 if (IFFUNC_ISSHADOWREGS (csym->type) != IFFUNC_ISSHADOWREGS (sym->type))
2460 werror (E_PREV_DEF_CONFLICT, csym->name, "shadowregs");
2464 /* compare expected args with actual args */
2465 exargs = FUNC_ARGS(csym->type);
2466 acargs = FUNC_ARGS(sym->type);
2468 /* for all the expected args do */
2471 exargs = exargs->next, acargs = acargs->next, argCnt++)
2473 if (getenv("DEBUG_SANITY")) {
2474 fprintf (stderr, "checkFunction: %s ", exargs->name);
2476 /* make sure the type is complete and sane */
2477 checkTypeSanity(exargs->etype, exargs->name);
2479 /* If the actual argument is an array, any prototype
2480 * will have modified it to a pointer. Duplicate that
2483 if (IS_AGGREGATE (acargs->type))
2485 checkValue = copyValue (acargs);
2486 aggregateToPointer (checkValue);
2490 checkValue = acargs;
2493 if (compareType (exargs->type, checkValue->type) <= 0)
2495 werror (E_ARG_TYPE, argCnt);
2496 printFromToType(exargs->type, checkValue->type);
2501 /* if one them ended we have a problem */
2502 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2503 (!exargs && acargs && !IS_VOID (acargs->type)))
2504 werror (E_ARG_COUNT);
2506 /* replace with this defition */
2507 sym->cdef = csym->cdef;
2508 deleteSym (SymbolTab, csym, csym->name);
2509 deleteFromSeg(csym);
2510 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
2511 if (IS_EXTERN (csym->etype) && !
2512 IS_EXTERN (sym->etype))
2514 addSet (&publics, sym);
2519 /*------------------------------------------------------------------*/
2520 /* cdbStructBlock - calls struct printing for a blcks */
2521 /*------------------------------------------------------------------*/
2522 void cdbStructBlock (int block)
2525 bucket **table = StructTab;
2528 /* go thru the entire table */
2529 for (i = 0; i < 256; i++)
2531 for (chain = table[i]; chain; chain = chain->next)
2533 if (chain->block >= block)
2536 debugFile->writeType((structdef *)chain->sym, chain->block, 0, NULL);
2542 /*-----------------------------------------------------------------*/
2543 /* processFuncArgs - does some processing with function args */
2544 /*-----------------------------------------------------------------*/
2546 processFuncArgs (symbol * func)
2550 sym_link *funcType=func->type;
2552 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
2553 fprintf (stderr, "SDCCsymt.c:processFuncArgs(%s)\n", func->name);
2555 /* find the function declaration within the type */
2556 while (funcType && !IS_FUNC(funcType))
2557 funcType=funcType->next;
2559 /* if this function has variable argument list */
2560 /* then make the function a reentrant one */
2561 if (IFFUNC_HASVARARGS(funcType) || (options.stackAuto && !func->cdef))
2562 FUNC_ISREENT(funcType)=1;
2564 /* check if this function is defined as calleeSaves
2565 then mark it as such */
2566 FUNC_CALLEESAVES(funcType) = inCalleeSaveList (func->name);
2568 /* loop thru all the arguments */
2569 val = FUNC_ARGS(funcType);
2571 /* if it is void then remove parameters */
2572 if (val && IS_VOID (val->type))
2574 FUNC_ARGS(funcType) = NULL;
2578 /* reset regparm for the port */
2579 (*port->reset_regparms) ();
2581 /* if any of the arguments is an aggregate */
2582 /* change it to pointer to the same type */
2586 char buffer[SDCC_NAME_MAX+1];
2588 SNPRINTF (buffer, sizeof(buffer), "%s parameter %d", func->name, pNum);
2589 checkTypeSanity (val->etype, buffer);
2591 /* mark it as a register parameter if
2592 the function does not have VA_ARG
2593 and as port dictates */
2594 if (!IFFUNC_HASVARARGS(funcType) &&
2595 (argreg = (*port->reg_parm) (val->type, FUNC_ISREENT(funcType))))
2597 SPEC_REGPARM (val->etype) = 1;
2598 SPEC_ARGREG(val->etype) = argreg;
2599 } else if (IFFUNC_ISREENT(funcType)) {
2600 FUNC_HASSTACKPARM(funcType) = 1;
2603 if (IS_AGGREGATE (val->type))
2605 aggregateToPointer (val);
2612 /* if this is an internal generated function call */
2614 /* ignore --stack-auto for this one, we don't know how it is compiled */
2615 /* simply trust on --int-long-reent or --float-reent */
2616 if (IFFUNC_ISREENT(funcType)) {
2620 /* if this function is reentrant or */
2621 /* automatics r 2b stacked then nothing */
2622 if (IFFUNC_ISREENT (funcType) || options.stackAuto)
2626 val = FUNC_ARGS(funcType);
2631 /* if a symbolname is not given */
2632 /* synthesize a variable name */
2635 SNPRINTF (val->name, sizeof(val->name),
2636 "_%s_PARM_%d", func->name, pNum++);
2637 val->sym = newSymbol (val->name, 1);
2638 if (SPEC_SCLS(val->etype) == S_BIT)
2639 SPEC_OCLS (val->etype) = bit;
2641 SPEC_OCLS (val->etype) = port->mem.default_local_map;
2642 val->sym->type = copyLinkChain (val->type);
2643 val->sym->etype = getSpec (val->sym->type);
2644 val->sym->_isparm = 1;
2645 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2647 /* ?? static functions shouldn't imply static parameters - EEP */
2648 if (IS_SPEC(func->etype)) {
2649 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2650 SPEC_STAT (func->etype);
2653 addSymChain (&val->sym);
2656 else /* symbol name given create synth name */
2659 SNPRINTF (val->name, sizeof(val->name), "_%s_PARM_%d", func->name, pNum++);
2660 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2661 val->sym->_isparm = 1;
2662 if (SPEC_SCLS(val->etype) == S_BIT)
2663 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) = bit;
2665 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) =
2666 (options.model != MODEL_SMALL ? xdata : data);
2669 /* ?? static functions shouldn't imply static parameters - EEP */
2670 if (IS_SPEC(func->etype)) {
2671 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2672 SPEC_STAT (func->etype);
2676 if (!isinSet(operKeyReset, val->sym)) {
2677 addSet (&operKeyReset, val->sym);
2678 applyToSet (operKeyReset, resetParmKey);
2684 /*-----------------------------------------------------------------*/
2685 /* isSymbolEqual - compares two symbols return 1 if they match */
2686 /*-----------------------------------------------------------------*/
2688 isSymbolEqual (symbol * dest, symbol * src)
2690 /* if pointers match then equal */
2694 /* if one of them is null then don't match */
2698 /* if both of them have rname match on rname */
2699 if (dest->rname[0] && src->rname[0])
2700 return (!strcmp (dest->rname, src->rname));
2702 /* otherwise match on name */
2703 return (!strcmp (dest->name, src->name));
2706 void PT(sym_link *type)
2708 printTypeChain(type,0);
2710 /*-----------------------------------------------------------------*/
2711 /* printTypeChain - prints the type chain in human readable form */
2712 /*-----------------------------------------------------------------*/
2714 printTypeChain (sym_link * start, FILE * of)
2718 sym_link * type, * search;
2728 fprintf (of, "void");
2732 /* Print the chain as it is written in the source: */
2733 /* start with the last entry. */
2734 /* However, the storage class at the end of the */
2735 /* chain reall applies to the first in the chain! */
2737 for (type = start; type && type->next; type = type->next)
2740 scls=SPEC_SCLS(type);
2748 case S_DATA: fprintf (of, "data-"); break;
2749 case S_XDATA: fprintf (of, "xdata-"); break;
2750 case S_SFR: fprintf (of, "sfr-"); break;
2751 case S_SBIT: fprintf (of, "sbit-"); break;
2752 case S_CODE: fprintf (of, "code-"); break;
2753 case S_IDATA: fprintf (of, "idata-"); break;
2754 case S_PDATA: fprintf (of, "pdata-"); break;
2755 case S_LITERAL: fprintf (of, "literal-"); break;
2756 case S_STACK: fprintf (of, "stack-"); break;
2757 case S_XSTACK: fprintf (of, "xstack-"); break;
2758 case S_BIT: fprintf (of, "bit-"); break;
2759 case S_EEPROM: fprintf (of, "eeprom-"); break;
2766 if (!IS_FUNC(type)) {
2767 if (DCL_PTR_VOLATILE (type)) {
2768 fprintf (of, "volatile-");
2770 if (DCL_PTR_CONST (type)) {
2771 fprintf (of, "const-");
2774 switch (DCL_TYPE (type))
2777 fprintf (of, "function %s %s",
2778 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2779 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2781 for (args = FUNC_ARGS(type);
2784 printTypeChain(args->type, of);
2791 fprintf (of, "generic* ");
2794 fprintf (of, "code* ");
2797 fprintf (of, "xdata* ");
2800 fprintf (of, "eeprom* ");
2803 fprintf (of, "near* ");
2806 fprintf (of, "idata* ");
2809 fprintf (of, "pdata* ");
2812 fprintf (of, "unknown* ");
2815 if (DCL_ELEM(type)) {
2816 fprintf (of, "[%d] ", DCL_ELEM(type));
2818 fprintf (of, "[] ");
2825 if (SPEC_VOLATILE (type))
2826 fprintf (of, "volatile-");
2827 if (SPEC_CONST (type))
2828 fprintf (of, "const-");
2829 if (SPEC_USIGN (type))
2830 fprintf (of, "unsigned-");
2831 switch (SPEC_NOUN (type))
2835 fprintf (of, "long-");
2836 fprintf (of, "int");
2840 fprintf (of, "char");
2844 fprintf (of, "void");
2848 fprintf (of, "float");
2852 fprintf (of, "fixed16x16");
2856 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2860 fprintf (of, "sbit");
2864 fprintf (of, "bit");
2868 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2872 fprintf (of, "double");
2876 fprintf (of, "unknown type");
2880 /* search entry in list before "type" */
2881 for (search = start; search && search->next != type;)
2882 search = search->next;
2891 /*--------------------------------------------------------------------*/
2892 /* printTypeChainRaw - prints the type chain in human readable form */
2893 /* in the raw data structure ordering */
2894 /*--------------------------------------------------------------------*/
2896 printTypeChainRaw (sym_link * start, FILE * of)
2909 fprintf (of, "void");
2919 if (!IS_FUNC(type)) {
2920 if (DCL_PTR_VOLATILE (type)) {
2921 fprintf (of, "volatile-");
2923 if (DCL_PTR_CONST (type)) {
2924 fprintf (of, "const-");
2927 switch (DCL_TYPE (type))
2930 fprintf (of, "function %s %s",
2931 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2932 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2934 for (args = FUNC_ARGS(type);
2937 printTypeChain(args->type, of);
2944 fprintf (of, "generic* ");
2947 fprintf (of, "code* ");
2950 fprintf (of, "xdata* ");
2953 fprintf (of, "eeprom* ");
2956 fprintf (of, "near* ");
2959 fprintf (of, "idata* ");
2962 fprintf (of, "pdata* ");
2965 fprintf (of, "unknown* ");
2968 if (DCL_ELEM(type)) {
2969 fprintf (of, "[%d] ", DCL_ELEM(type));
2971 fprintf (of, "[] ");
2975 if (DCL_TSPEC(type))
2978 printTypeChainRaw(DCL_TSPEC(type), of);
2982 else if (IS_SPEC (type))
2984 switch (SPEC_SCLS (type))
2986 case S_DATA: fprintf (of, "data-"); break;
2987 case S_XDATA: fprintf (of, "xdata-"); break;
2988 case S_SFR: fprintf (of, "sfr-"); break;
2989 case S_SBIT: fprintf (of, "sbit-"); break;
2990 case S_CODE: fprintf (of, "code-"); break;
2991 case S_IDATA: fprintf (of, "idata-"); break;
2992 case S_PDATA: fprintf (of, "pdata-"); break;
2993 case S_LITERAL: fprintf (of, "literal-"); break;
2994 case S_STACK: fprintf (of, "stack-"); break;
2995 case S_XSTACK: fprintf (of, "xstack-"); break;
2996 case S_BIT: fprintf (of, "bit-"); break;
2997 case S_EEPROM: fprintf (of, "eeprom-"); break;
3000 if (SPEC_VOLATILE (type))
3001 fprintf (of, "volatile-");
3002 if (SPEC_CONST (type))
3003 fprintf (of, "const-");
3004 if (SPEC_USIGN (type))
3005 fprintf (of, "unsigned-");
3006 switch (SPEC_NOUN (type))
3010 fprintf (of, "long-");
3011 fprintf (of, "int");
3015 fprintf (of, "char");
3019 fprintf (of, "void");
3023 fprintf (of, "float");
3027 fprintf (of, "fixed16x16");
3031 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
3035 fprintf (of, "sbit");
3039 fprintf (of, "bit");
3043 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
3047 fprintf (of, "double");
3051 fprintf (of, "unknown type");
3056 fprintf (of, "NOT_SPEC_OR_DECL");
3066 /*-----------------------------------------------------------------*/
3067 /* powof2 - returns power of two for the number if number is pow 2 */
3068 /*-----------------------------------------------------------------*/
3070 powof2 (TYPE_UDWORD num)
3083 if (n1s > 1 || nshifts == 0)
3099 symbol *__fps16x16_add;
3100 symbol *__fps16x16_sub;
3101 symbol *__fps16x16_mul;
3102 symbol *__fps16x16_div;
3103 symbol *__fps16x16_eq;
3104 symbol *__fps16x16_neq;
3105 symbol *__fps16x16_lt;
3106 symbol *__fps16x16_lteq;
3107 symbol *__fps16x16_gt;
3108 symbol *__fps16x16_gteq;
3110 /* Dims: mul/div/mod, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
3111 symbol *__muldiv[3][3][2];
3112 /* Dims: BYTE/WORD/DWORD SIGNED/UNSIGNED */
3113 sym_link *__multypes[3][2];
3114 /* Dims: to/from float, BYTE/WORD/DWORD, SIGNED/USIGNED */
3115 symbol *__conv[2][3][2];
3116 /* Dims: to/from fixed16x16, BYTE/WORD/DWORD/FLOAT, SIGNED/USIGNED */
3117 symbol *__fp16x16conv[2][4][2];
3118 /* Dims: shift left/shift right, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
3119 symbol *__rlrr[2][3][2];
3121 sym_link *floatType;
3122 sym_link *fixed16x16Type;
3125 _mangleFunctionName(char *in)
3127 if (port->getMangledFunctionName)
3129 return port->getMangledFunctionName(in);
3137 /*-----------------------------------------------------------------*/
3138 /* typeFromStr - create a typechain from an encoded string */
3139 /* basic types - 'c' - char */
3144 /* 'q' - fixed16x16 */
3146 /* '*' - pointer - default (GPOINTER) */
3147 /* modifiers - 'u' - unsigned */
3148 /* pointer modifiers - 'g' - generic */
3152 /* 'F' - function */
3153 /* examples : "ig*" - generic int * */
3154 /* "cx*" - char xdata * */
3155 /* "ui" - unsigned int */
3156 /*-----------------------------------------------------------------*/
3157 sym_link *typeFromStr (char *s)
3159 sym_link *r = newLink(DECLARATOR);
3171 r->class = SPECIFIER;
3172 SPEC_NOUN(r) = V_CHAR;
3176 r->class = SPECIFIER;
3177 SPEC_NOUN(r) = V_INT;
3180 r->class = SPECIFIER;
3181 SPEC_NOUN(r) = V_INT;
3185 r->class = SPECIFIER;
3186 SPEC_NOUN(r) = V_FLOAT;
3189 r->class = SPECIFIER;
3190 SPEC_NOUN(r) = V_FIXED16X16;
3193 r->class = SPECIFIER;
3194 SPEC_NOUN(r) = V_VOID;
3197 DCL_TYPE(r) = port->unqualified_pointer;
3204 assert(*(s+1)=='*');
3205 nr = newLink(DECLARATOR);
3210 DCL_TYPE(r) = GPOINTER;
3213 DCL_TYPE(r) = FPOINTER;
3216 DCL_TYPE(r) = CPOINTER;
3219 DCL_TYPE(r) = POINTER;
3222 DCL_TYPE(r) = FUNCTION;
3223 nr = newLink(DECLARATOR);
3226 DCL_TYPE(r) = CPOINTER;
3232 werror(E_INTERNAL_ERROR, __FILE__, __LINE__,
3233 "typeFromStr: unknown type");
3236 if (IS_SPEC(r) && usign) {
3245 /*-----------------------------------------------------------------*/
3246 /* initCSupport - create functions for C support routines */
3247 /*-----------------------------------------------------------------*/
3251 const char *smuldivmod[] =
3255 const char *sbwd[] =
3257 "char", "int", "long", "fixed16x16",
3259 const char *fp16x16sbwd[] =
3261 "char", "int", "long", "float",
3267 const char *srlrr[] =
3272 int bwd, su, muldivmod, tofrom, rlrr;
3274 if (getenv("SDCC_NO_C_SUPPORT")) {
3275 /* for debugging only */
3279 floatType = newFloatLink ();
3280 fixed16x16Type = newFixed16x16Link ();
3282 for (bwd = 0; bwd < 3; bwd++)
3299 __multypes[bwd][0] = l;
3300 __multypes[bwd][1] = copyLinkChain (l);
3301 SPEC_USIGN (__multypes[bwd][1]) = 1;
3304 __fsadd = funcOfType ("__fsadd", floatType, floatType, 2, options.float_rent);
3305 __fssub = funcOfType ("__fssub", floatType, floatType, 2, options.float_rent);
3306 __fsmul = funcOfType ("__fsmul", floatType, floatType, 2, options.float_rent);
3307 __fsdiv = funcOfType ("__fsdiv", floatType, floatType, 2, options.float_rent);
3308 __fseq = funcOfType ("__fseq", CHARTYPE, floatType, 2, options.float_rent);
3309 __fsneq = funcOfType ("__fsneq", CHARTYPE, floatType, 2, options.float_rent);
3310 __fslt = funcOfType ("__fslt", CHARTYPE, floatType, 2, options.float_rent);
3311 __fslteq = funcOfType ("__fslteq", CHARTYPE, floatType, 2, options.float_rent);
3312 __fsgt = funcOfType ("__fsgt", CHARTYPE, floatType, 2, options.float_rent);
3313 __fsgteq = funcOfType ("__fsgteq", CHARTYPE, floatType, 2, options.float_rent);
3315 __fps16x16_add = funcOfType ("__fps16x16_add", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3316 __fps16x16_sub = funcOfType ("__fps16x16_sub", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3317 __fps16x16_mul = funcOfType ("__fps16x16_mul", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3318 __fps16x16_div = funcOfType ("__fps16x16_div", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3319 __fps16x16_eq = funcOfType ("__fps16x16_eq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3320 __fps16x16_neq = funcOfType ("__fps16x16_neq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3321 __fps16x16_lt = funcOfType ("__fps16x16_lt", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3322 __fps16x16_lteq = funcOfType ("__fps16x16_lteq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3323 __fps16x16_gt = funcOfType ("__fps16x16_gt", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3324 __fps16x16_gteq = funcOfType ("__fps16x16_gteq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3327 for (tofrom = 0; tofrom < 2; tofrom++)
3329 for (bwd = 0; bwd < 3; bwd++)
3331 for (su = 0; su < 2; su++)
3335 SNPRINTF (buffer, sizeof(buffer), "__fs2%s%s", ssu[su], sbwd[bwd]);
3336 __conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], floatType, 1, options.float_rent);
3340 SNPRINTF (buffer, sizeof(buffer), "__%s%s2fs", ssu[su], sbwd[bwd]);
3341 __conv[tofrom][bwd][su] = funcOfType (buffer, floatType, __multypes[bwd][su], 1, options.float_rent);
3347 for (tofrom = 0; tofrom < 2; tofrom++)
3349 for (bwd = 0; bwd < 4; bwd++)
3351 for (su = 0; su < 2; su++)
3355 SNPRINTF (buffer, sizeof(buffer), "__fps16x162%s%s", ssu[su], fp16x16sbwd[bwd]);
3357 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, floatType, fixed16x16Type, 1, options.float_rent);
3359 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], fixed16x16Type, 1, options.float_rent);
3363 SNPRINTF (buffer, sizeof(buffer), "__%s%s2fps16x16", ssu[su], fp16x16sbwd[bwd]);
3365 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, fixed16x16Type, floatType, 1, options.float_rent);
3367 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, fixed16x16Type, __multypes[bwd][su], 1, options.float_rent);
3374 for (muldivmod = 0; muldivmod < 3; muldivmod++)
3376 for (bwd = 0; bwd < 3; bwd++)
3378 for (su = 0; su < 2; su++)
3380 SNPRINTF (buffer, sizeof(buffer),
3382 smuldivmod[muldivmod],
3385 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3386 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3391 muluint() and mulsint() resp. mululong() and mulslong() return the same result.
3392 Therefore they've been merged into mulint() and mullong().
3395 for (bwd = 0; bwd < 3; bwd++)
3397 for (su = 0; su < 2; su++)
3399 for (muldivmod = 1; muldivmod < 3; muldivmod++)
3402 SNPRINTF (buffer, sizeof(buffer),
3404 smuldivmod[muldivmod],
3407 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3408 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3416 for (su = 0; su < 2; su++)
3418 /* muluchar and mulschar are still separate functions, because e.g. the z80
3419 port is sign/zero-extending to int before calling mulint() */
3420 SNPRINTF (buffer, sizeof(buffer),
3422 smuldivmod[muldivmod],
3425 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3426 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3430 /* word and doubleword */
3431 for (bwd = 1; bwd < 3; bwd++)
3434 SNPRINTF (buffer, sizeof(buffer),
3436 smuldivmod[muldivmod],
3438 __muldiv[muldivmod][bwd][0] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3439 FUNC_NONBANKED (__muldiv[muldivmod][bwd][0]->type) = 1;
3440 /* signed = unsigned */
3441 __muldiv[muldivmod][bwd][1] = __muldiv[muldivmod][bwd][0];
3444 for (rlrr = 0; rlrr < 2; rlrr++)
3446 for (bwd = 0; bwd < 3; bwd++)
3448 for (su = 0; su < 2; su++)
3450 SNPRINTF (buffer, sizeof(buffer),
3455 __rlrr[rlrr][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[0][0], 2, options.intlong_rent);
3456 FUNC_NONBANKED (__rlrr[rlrr][bwd][su]->type) = 1;
3462 /*-----------------------------------------------------------------*/
3463 /* initBuiltIns - create prototypes for builtin functions */
3464 /*-----------------------------------------------------------------*/
3470 if (!port->builtintable) return ;
3472 for (i = 0 ; port->builtintable[i].name ; i++) {
3473 sym = funcOfTypeVarg(port->builtintable[i].name,port->builtintable[i].rtype,
3474 port->builtintable[i].nParms,port->builtintable[i].parm_types);
3475 FUNC_ISBUILTIN(sym->type) = 1;
3476 FUNC_ISREENT(sym->type) = 0; /* can never be reentrant */
3480 sym_link *validateLink(sym_link *l,
3487 if (l && l->class==select)
3492 "Internal error: validateLink failed in %s(%s) @ %s:%u:"
3493 " expected %s, got %s\n",
3494 macro, args, file, line,
3495 DECLSPEC2TXT(select), l ? DECLSPEC2TXT(l->class) : "null-link");
3497 return l; // never reached, makes compiler happy.
3500 /*--------------------------------------------------------------------*/
3501 /* newEnumType - create an integer type compatible with enumerations */
3502 /*--------------------------------------------------------------------*/
3504 newEnumType (symbol *enumlist)
3512 type = newLink (SPECIFIER);
3513 SPEC_NOUN (type) = V_INT;
3517 /* Determine the range of the enumerated values */
3519 min = max = (int) floatFromVal (valFromType (sym->type));
3520 for (sym = sym->next; sym; sym = sym->next)
3522 v = (int) floatFromVal (valFromType (sym->type));
3529 /* Determine the smallest integer type that is compatible with this range */
3530 type = newLink (SPECIFIER);
3531 if (min>=0 && max<=255)
3533 SPEC_NOUN (type) = V_CHAR;
3534 SPEC_USIGN (type) = 1;
3536 else if (min>=-128 && max<=127)
3538 SPEC_NOUN (type) = V_CHAR;
3540 else if (min>=0 && max<=65535)
3542 SPEC_NOUN (type) = V_INT;
3543 SPEC_USIGN (type) = 1;
3545 else if (min>=-32768 && max<=32767)
3547 SPEC_NOUN (type) = V_INT;
3551 SPEC_NOUN (type) = V_INT;
3552 SPEC_LONG (type) = 1;
3554 SPEC_USIGN (type) = 1;