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 SPEC_USIGN (loop->etype) = 1;
1237 SPEC_BLEN (loop->etype) = loop->bitVar;
1239 if (loop->bitVar == BITVAR_PAD) {
1240 /* A zero length bitfield forces padding */
1241 SPEC_BSTR (loop->etype) = bitOffset;
1242 SPEC_BLEN (loop->etype) = 0;
1247 if (bitOffset == 8) {
1251 /* check if this fit into the remaining */
1252 /* bits of this byte else align it to the */
1253 /* next byte boundary */
1254 if (loop->bitVar <= (8 - bitOffset)) {
1255 /* fits into current byte */
1257 SPEC_BSTR (loop->etype) = bitOffset;
1258 bitOffset += loop->bitVar;
1260 else if (!bitOffset) {
1261 /* does not fit, but is already byte aligned */
1263 SPEC_BSTR (loop->etype) = bitOffset;
1264 bitOffset += loop->bitVar;
1267 /* does not fit; need to realign first */
1269 loop->offset = (su == UNION ? sum = 0 : sum);
1271 SPEC_BSTR (loop->etype) = bitOffset;
1272 bitOffset += loop->bitVar;
1274 while (bitOffset>8) {
1281 /* This is a non-bit field. Make sure we are */
1282 /* byte aligned first */
1285 loop->offset = (su == UNION ? sum = 0 : sum);
1289 checkDecl (loop, 1);
1290 sum += getSize (loop->type);
1295 /* if union then size = sizeof largest field */
1297 /* For UNION, round up after each field */
1298 sum += ((bitOffset+7)/8);
1299 usum = max (usum, sum);
1304 /* For STRUCT, round up after all fields processed */
1306 sum += ((bitOffset+7)/8);
1308 return (su == UNION ? usum : sum);
1311 /*-------------------------------------------------------------------*/
1312 /* promoteAnonStructs - promote anonymous struct/union's fields into */
1313 /* an enclosing struct/union */
1314 /*-------------------------------------------------------------------*/
1316 promoteAnonStructs (int su, structdef * sdef)
1325 tofield = &sdef->fields;
1326 field = sdef->fields;
1329 nextfield = field->next;
1330 if (!*field->name && IS_STRUCT (field->type))
1332 /* Found an anonymous struct/union. Replace it */
1333 /* with the fields it contains and adjust all */
1336 base = field->offset;
1337 subfield = copySymbolChain (SPEC_STRUCT (field->type)->fields);
1339 continue; /* just in case it's empty */
1341 *tofield = subfield;
1344 /* check for field name conflicts resulting from promotion */
1345 dupfield = sdef->fields;
1346 while (dupfield && dupfield != subfield)
1348 if (*subfield->name && !strcmp (dupfield->name, subfield->name))
1350 werrorfl (subfield->fileDef, subfield->lineDef,
1352 su==STRUCT ? "struct" : "union",
1354 werrorfl (dupfield->fileDef, dupfield->lineDef,
1357 dupfield = dupfield->next;
1360 subfield->offset += base;
1362 subfield = subfield->next;
1366 subfield->next = nextfield;
1367 tofield = &subfield->next;
1370 tofield = &field->next;
1376 /*------------------------------------------------------------------*/
1377 /* checkSClass - check the storage class specification */
1378 /*------------------------------------------------------------------*/
1380 checkSClass (symbol * sym, int isProto)
1384 if (getenv("DEBUG_SANITY")) {
1385 fprintf (stderr, "checkSClass: %s \n", sym->name);
1388 /* type is literal can happen for enums change
1390 if (SPEC_SCLS (sym->etype) == S_LITERAL && !SPEC_ENUM (sym->etype))
1391 SPEC_SCLS (sym->etype) = S_AUTO;
1393 /* if sfr or sbit then must also be volatile */
1394 if (SPEC_SCLS (sym->etype) == S_SBIT ||
1395 SPEC_SCLS (sym->etype) == S_SFR)
1397 SPEC_VOLATILE (sym->etype) = 1;
1400 /* if absolute address given then it mark it as
1401 volatile -- except in the PIC port */
1403 #if !OPT_DISABLE_PIC || !OPT_DISABLE_PIC16
1404 /* The PIC port uses a different peep hole optimizer based on "pCode" */
1405 if (!TARGET_IS_PIC && !TARGET_IS_PIC16)
1408 if (IS_ABSOLUTE (sym->etype))
1409 SPEC_VOLATILE (sym->etype) = 1;
1411 if (TARGET_IS_MCS51 &&
1412 IS_ABSOLUTE (sym->etype) &&
1413 SPEC_SCLS (sym->etype) == S_SFR)
1418 if (SPEC_NOUN (sym->etype) == V_CHAR)
1420 else if (SPEC_LONG (sym->etype) == 0)
1425 addr = SPEC_ADDR (sym->etype);
1426 for (n=0; n<size; n+=8)
1427 if (((addr >> n) & 0xFF) < 0x80)
1428 werror (W_SFR_ABSRANGE, sym->name);
1431 /* If code memory is read only, then pointers to code memory */
1432 /* implicitly point to constants -- make this explicit */
1434 while (t && t->next) {
1435 if (IS_CODEPTR(t) && port->mem.code_ro) {
1436 if (IS_SPEC(t->next)) {
1437 SPEC_CONST (t->next) = 1;
1439 DCL_PTR_CONST (t->next) = 1;
1445 /* global variables declared const put into code */
1446 /* if no other storage class specified */
1447 if (sym->level == 0 &&
1448 SPEC_SCLS(sym->etype) == S_FIXED &&
1449 !IS_FUNC(sym->type)) {
1450 /* find the first non-array link */
1454 if (IS_CONSTANT (t)) {
1455 SPEC_SCLS (sym->etype) = S_CODE;
1459 /* global variable in code space is a constant */
1460 if (sym->level == 0 &&
1461 SPEC_SCLS (sym->etype) == S_CODE &&
1462 port->mem.code_ro) {
1463 /* find the first non-array link */
1470 DCL_PTR_CONST (t) = 1;
1474 /* if bit variable then no storage class can be */
1475 /* specified since bit is already a storage */
1476 if (IS_BITVAR (sym->etype) &&
1477 (SPEC_SCLS (sym->etype) != S_FIXED &&
1478 SPEC_SCLS (sym->etype) != S_SBIT &&
1479 SPEC_SCLS (sym->etype) != S_BIT)
1482 werror (E_BITVAR_STORAGE, sym->name);
1483 SPEC_SCLS (sym->etype) = S_FIXED;
1486 /* extern variables cannot be initialized */
1487 if (IS_EXTERN (sym->etype) && sym->ival)
1489 werror (E_EXTERN_INIT, sym->name);
1493 /* if this is an automatic symbol */
1494 if (sym->level && (options.stackAuto || reentrant)) {
1495 if (SPEC_SCLS (sym->etype) != S_BIT) {
1496 if ((SPEC_SCLS (sym->etype) == S_AUTO ||
1497 SPEC_SCLS (sym->etype) == S_FIXED ||
1498 SPEC_SCLS (sym->etype) == S_REGISTER ||
1499 SPEC_SCLS (sym->etype) == S_STACK ||
1500 SPEC_SCLS (sym->etype) == S_XSTACK)) {
1501 SPEC_SCLS (sym->etype) = S_AUTO;
1503 /* storage class may only be specified for statics */
1504 if (!IS_STATIC(sym->etype)) {
1505 werror (E_AUTO_ASSUMED, sym->name);
1511 /* automatic symbols cannot be given */
1512 /* an absolute address ignore it */
1514 SPEC_ABSA (sym->etype) &&
1515 (options.stackAuto || reentrant))
1517 werror (E_AUTO_ABSA, sym->name);
1518 SPEC_ABSA (sym->etype) = 0;
1521 /* arrays & pointers cannot be defined for bits */
1522 /* SBITS or SFRs or BIT */
1523 if ((IS_ARRAY (sym->type) || IS_PTR (sym->type)) &&
1524 (SPEC_NOUN (sym->etype) == V_BIT ||
1525 SPEC_NOUN (sym->etype) == V_SBIT ||
1526 SPEC_NOUN (sym->etype) == V_BITFIELD ||
1527 SPEC_SCLS (sym->etype) == S_SFR))
1528 werror (E_BIT_ARRAY, sym->name);
1530 /* if this is a bit|sbit then set length & start */
1531 if (SPEC_NOUN (sym->etype) == V_BIT ||
1532 SPEC_NOUN (sym->etype) == V_SBIT)
1534 SPEC_BLEN (sym->etype) = 1;
1535 SPEC_BSTR (sym->etype) = 0;
1539 /* variables declared in CODE space must have */
1540 /* initializers if not an extern */
1541 if (SPEC_SCLS (sym->etype) == S_CODE &&
1542 sym->ival == NULL &&
1545 port->mem.code_ro &&
1546 !IS_EXTERN (sym->etype) &&
1547 !funcInChain (sym->type))
1548 werror (E_CODE_NO_INIT, sym->name);
1551 /* if parameter or local variable then change */
1552 /* the storage class to reflect where the var will go */
1553 if (sym->level && SPEC_SCLS (sym->etype) == S_FIXED
1554 && !IS_STATIC(sym->etype)
1557 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
1559 SPEC_SCLS (sym->etype) = (options.useXstack ?
1560 S_XSTACK : S_STACK);
1564 /* hack-o-matic! I see no reason why the useXstack option should ever
1565 * control this allocation, but the code was originally that way, and
1566 * changing it for non-390 ports breaks the compiler badly.
1568 bool useXdata = (TARGET_IS_DS390 || TARGET_IS_DS400) ?
1569 1 : options.useXstack;
1570 SPEC_SCLS (sym->etype) = (useXdata ?
1576 /*------------------------------------------------------------------*/
1577 /* changePointer - change pointer to functions */
1578 /*------------------------------------------------------------------*/
1580 changePointer (sym_link * p)
1583 /* go thru the chain of declarations */
1584 /* if we find a pointer to a function */
1585 /* change it to a ptr to code area */
1586 /* unless the function is banked. */
1587 for (; p; p = p->next)
1589 if (!IS_SPEC (p) && DCL_TYPE (p) == UPOINTER)
1590 DCL_TYPE (p) = port->unqualified_pointer;
1591 if (IS_PTR (p) && IS_FUNC (p->next))
1592 if (!IFFUNC_BANKED(p->next))
1593 DCL_TYPE (p) = CPOINTER;
1597 /*------------------------------------------------------------------*/
1598 /* checkDecl - does semantic validation of a declaration */
1599 /*------------------------------------------------------------------*/
1601 checkDecl (symbol * sym, int isProto)
1604 checkSClass (sym, isProto); /* check the storage class */
1605 changePointer (sym->type); /* change pointers if required */
1607 /* if this is an array without any dimension
1608 then update the dimension from the initial value */
1609 if (IS_ARRAY (sym->type) && !DCL_ELEM (sym->type))
1610 DCL_ELEM (sym->type) = getNelements (sym->type, sym->ival);
1615 /*------------------------------------------------------------------*/
1616 /* copyLinkChain - makes a copy of the link chain & rets ptr 2 head */
1617 /*------------------------------------------------------------------*/
1619 copyLinkChain (sym_link * p)
1621 sym_link *head, *curr, *loop;
1624 head = loop = (curr ? newLink (p->class) : (void *) NULL);
1627 memcpy (loop, curr, sizeof (sym_link)); /* copy it */
1628 loop->next = (curr->next ? newLink (curr->next->class) : (void *) NULL);
1636 /*------------------------------------------------------------------*/
1637 /* cleanUpBlock - cleansup the symbol table specified for all the */
1638 /* symbols in the given block */
1639 /*------------------------------------------------------------------*/
1641 cleanUpBlock (bucket ** table, int block)
1646 /* go thru the entire table */
1647 for (i = 0; i < 256; i++)
1649 for (chain = table[i]; chain; chain = chain->next)
1651 if (chain->block >= block)
1653 deleteSym (table, chain->sym, chain->name);
1659 /*------------------------------------------------------------------*/
1660 /* cleanUpLevel - cleansup the symbol table specified for all the */
1661 /* symbols in the given level */
1662 /*------------------------------------------------------------------*/
1664 cleanUpLevel (bucket ** table, int level)
1669 /* go thru the entire table */
1670 for (i = 0; i < 256; i++)
1672 for (chain = table[i]; chain; chain = chain->next)
1674 if (chain->level >= level)
1676 deleteSym (table, chain->sym, chain->name);
1682 /*------------------------------------------------------------------*/
1683 /* computeTypeOr - computes the resultant type from two types */
1684 /*------------------------------------------------------------------*/
1686 computeTypeOr (sym_link * etype1, sym_link * etype2, sym_link * reType)
1689 assert ( (IS_CHAR (etype1) || IS_BIT (etype1))
1690 && (IS_CHAR (etype2) || IS_BIT (etype2)));
1692 if (SPEC_USIGN (etype1) == SPEC_USIGN (etype2))
1694 SPEC_USIGN (reType) = SPEC_USIGN (etype1);
1698 if (SPEC_USIGN (etype1))
1700 if ( IS_LITERAL (etype2)
1701 && floatFromVal (valFromType (etype2)) >= 0)
1702 SPEC_USIGN (reType) = 1;
1705 /* promote to int */
1706 SPEC_USIGN (reType) = 0;
1707 SPEC_NOUN (reType) = V_INT;
1710 else /* etype1 signed */
1712 if ( IS_LITERAL (etype2)
1713 && floatFromVal (valFromType (etype2)) <= 127)
1714 SPEC_USIGN (reType) = 0;
1717 /* promote to int */
1718 SPEC_USIGN (reType) = 0;
1719 SPEC_NOUN (reType) = V_INT;
1723 if (SPEC_USIGN (etype2))
1725 if ( IS_LITERAL (etype1)
1726 && floatFromVal (valFromType (etype1)) >= 0)
1727 SPEC_USIGN (reType) = 1;
1730 /* promote to int */
1731 SPEC_USIGN (reType) = 0;
1732 SPEC_NOUN (reType) = V_INT;
1735 else /* etype2 signed */
1737 if ( IS_LITERAL (etype1)
1738 && floatFromVal (valFromType (etype1)) <= 127)
1739 SPEC_USIGN (reType) = 0;
1742 /* promote to int */
1743 SPEC_USIGN (reType) = 0;
1744 SPEC_NOUN (reType) = V_INT;
1750 /*------------------------------------------------------------------*/
1751 /* computeType - computes the resultant type from two types */
1752 /*------------------------------------------------------------------*/
1754 computeType (sym_link * type1, sym_link * type2,
1755 RESULT_TYPE resultType, int op)
1759 sym_link *etype1 = getSpec (type1);
1762 etype2 = type2 ? getSpec (type2) : type1;
1764 /* if one of them is a float then result is a float */
1765 /* here we assume that the types passed are okay */
1766 /* and can be cast to one another */
1767 /* which ever is greater in size */
1768 if (IS_FLOAT (etype1) || IS_FLOAT (etype2))
1769 rType = newFloatLink ();
1771 /* if both are fixed16x16 then result is float */
1772 if (IS_FIXED16X16(etype1) && IS_FIXED16X16(etype2))
1773 rType = newFixed16x16Link();
1775 if (IS_FIXED16X16(etype1) && IS_FLOAT (etype2))
1776 rType = newFloatLink ();
1777 if (IS_FLOAT (etype1) && IS_FIXED16X16 (etype2) )
1778 rType = newFloatLink ();
1780 /* if both are bitvars choose the larger one */
1781 if (IS_BITVAR (etype1) && IS_BITVAR (etype2))
1783 rType = SPEC_BLEN (etype1) >= SPEC_BLEN (etype2) ?
1784 copyLinkChain (type1) : copyLinkChain (type1);
1786 /* if only one of them is a bit variable
1787 then the other one prevails */
1788 else if (IS_BITVAR (etype1) && !IS_BITVAR (etype2))
1790 rType = copyLinkChain (type2);
1791 /* bitfield can have up to 16 bits */
1792 if (getSize (etype1) > 1)
1793 SPEC_NOUN (getSpec (rType)) = V_INT;
1795 else if (IS_BITVAR (etype2) && !IS_BITVAR (etype1))
1797 rType = copyLinkChain (type1);
1798 /* bitfield can have up to 16 bits */
1799 if (getSize (etype2) > 1)
1800 SPEC_NOUN (getSpec (rType)) = V_INT;
1803 /* if one of them is a pointer or array then that
1805 if (IS_PTR (type1) || IS_ARRAY (type1))
1806 rType = copyLinkChain (type1);
1807 else if (IS_PTR (type2) || IS_ARRAY (type2))
1808 rType = copyLinkChain (type2);
1809 else if (getSize (type1) > getSize (type2))
1810 rType = copyLinkChain (type1);
1812 rType = copyLinkChain (type2);
1814 reType = getSpec (rType);
1816 /* avoid conflicting types */
1817 reType->select.s.b_signed = 0;
1819 /* if result is a literal then make not so */
1820 if (IS_LITERAL (reType))
1821 SPEC_SCLS (reType) = S_REGISTER;
1825 case RESULT_TYPE_CHAR:
1826 if (IS_BITVAR (reType))
1828 SPEC_NOUN (reType) = V_CHAR;
1829 SPEC_SCLS (reType) = 0;
1830 SPEC_USIGN (reType) = 0;
1834 case RESULT_TYPE_INT:
1835 case RESULT_TYPE_NONE:
1836 case RESULT_TYPE_OTHER:
1837 if (IS_BIT (reType))
1839 SPEC_NOUN (reType) = V_CHAR;
1840 SPEC_SCLS (reType) = 0;
1841 SPEC_USIGN (reType) = 0;
1844 else if (IS_BITFIELD (reType))
1846 /* could be smarter, but it depends on the op */
1847 /* this is for the worst case: a multiplication of 4 * 4 bit */
1848 SPEC_NOUN (reType) = SPEC_BLEN (reType) <= 4 ? V_CHAR : V_INT;
1849 SPEC_SCLS (reType) = 0;
1850 SPEC_USIGN (reType) = 0;
1853 else if (IS_CHAR (reType))
1855 if (op == '|' || op == '^')
1856 return computeTypeOr (etype1, etype2, reType);
1858 && SPEC_USIGN (etype1) != SPEC_USIGN (etype2))
1860 SPEC_USIGN (reType) = 1;
1865 SPEC_NOUN (reType) = V_INT;
1866 SPEC_USIGN (reType) = 0;
1869 /* TODO: should be in SDCCast.c */
1871 && ( !SPEC_USIGN (etype1)
1872 || !SPEC_USIGN (etype2)))
1874 SPEC_NOUN (reType) = V_INT;
1875 SPEC_USIGN (reType) = 0;
1884 /* SDCC's sign promotion:
1885 - if one or both operands are unsigned, the resultant type will be unsigned
1886 (except char, see below)
1887 - if an operand is promoted to a larger type (char -> int, int -> long),
1888 the larger type will be signed
1890 SDCC tries hard to avoid promotion to int and does 8 bit calculation as
1891 much as possible. We're leaving ISO IEC 9899 here and have to extrapolate
1892 the standard. The standard demands, that the result has to be the same
1893 "as if" the promotion would have been performed:
1895 - if the result of an operation with two char's is promoted to a
1896 larger type, the result will be signed.
1898 More sophisticated are these:
1899 - if the result of an operation with two char's is a char again,
1900 the result will only then be unsigned, if both operands are
1901 unsigned. In all other cases the result will be signed.
1903 This seems to be contradictionary to the first two rules, but it makes
1904 real sense (all types are char's):
1906 A signed char can be negative; this must be preserved in the result
1909 Only if both operands are unsigned it's safe to make the result
1910 unsigned; this helps to avoid overflow:
1913 - ToDo: document '|', '^' and '&'
1915 Homework: - why is (200 * 200 < 0) true?
1916 - why is { char l = 200, r = 200; (r * l > 0) } true?
1919 if (!IS_FLOAT (reType)
1920 && ( (SPEC_USIGN (etype1)
1921 /* if this operand is promoted to a larger type,
1922 then it will be promoted to a signed type */
1923 && !(getSize (etype1) < getSize (reType))
1924 /* char require special handling */
1925 && !IS_CHAR (etype1))
1926 || /* same for 2nd operand */
1927 (SPEC_USIGN (etype2)
1928 && !(getSize (etype2) < getSize (reType))
1929 && !IS_CHAR (etype2))
1930 || /* if both are 'unsigned char' and not promoted
1931 let the result be unsigned too */
1932 ( SPEC_USIGN (etype1)
1933 && SPEC_USIGN (etype2)
1936 && IS_CHAR (reType))))
1937 SPEC_USIGN (reType) = 1;
1939 SPEC_USIGN (reType) = 0;
1944 /*--------------------------------------------------------------------*/
1945 /* compareType - will do type check return 1 if match, -1 if castable */
1946 /*--------------------------------------------------------------------*/
1948 compareType (sym_link * dest, sym_link * src)
1959 /* if dest is a declarator then */
1964 /* banked function pointer */
1965 if (IS_GENPTR (dest) && IS_GENPTR (src))
1967 if (IS_FUNC (src->next) && IS_VOID(dest->next))
1969 if (IS_FUNC (dest->next) && IS_VOID(src->next))
1971 return compareType (dest->next, src->next);
1974 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
1976 //checkFunction(src,dest);
1978 return compareType (dest->next, src->next);
1980 if (IS_PTR (dest) && IS_GENPTR (src) && IS_VOID(src->next)) {
1984 (IS_GENPTR (dest) ||
1985 ((DCL_TYPE(src) == POINTER) && (DCL_TYPE(dest) == IPOINTER))
1988 if (IS_PTR (dest) && IS_ARRAY (src)) {
1989 value *val=aggregateToPointer (valFromType(src));
1990 int res=compareType (dest, val->type);
1991 Safe_free(val->type);
1995 if (IS_PTR (dest) && IS_FUNC (dest->next) && IS_FUNC (src))
1996 return compareType (dest->next, src);
1999 else if (IS_PTR (dest) && IS_INTEGRAL (src))
2005 /* if one is a specifier and the other is not */
2006 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
2007 (IS_SPEC (dest) && !IS_SPEC (src)))
2010 /* if one of them is a void then ok */
2011 if (SPEC_NOUN (dest) == V_VOID &&
2012 SPEC_NOUN (src) != V_VOID)
2015 if (SPEC_NOUN (dest) != V_VOID &&
2016 SPEC_NOUN (src) == V_VOID)
2019 /* if they are both bitfields then if the lengths
2020 and starts don't match */
2021 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
2022 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
2023 SPEC_BSTR (dest) != SPEC_BSTR (src)))
2026 /* it is a specifier */
2027 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
2029 if (SPEC_USIGN (dest) == SPEC_USIGN (src) &&
2030 IS_INTEGRAL (dest) && IS_INTEGRAL (src) &&
2032 bitsForType (dest) == bitsForType (src))
2033 instead of the next two lines, but the regression tests fail with
2034 them; I guess it's a problem with replaceCheaperOp */
2035 getSize (dest) == getSize (src) &&
2036 !(!IS_BIT (dest) && IS_BIT (src)))
2038 else if (IS_ARITHMETIC (dest) && IS_ARITHMETIC (src))
2043 else if (IS_STRUCT (dest))
2045 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
2050 if (SPEC_LONG (dest) != SPEC_LONG (src))
2053 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
2059 /*--------------------------------------------------------------------*/
2060 /* compareTypeExact - will do type check return 1 if match exactly */
2061 /*--------------------------------------------------------------------*/
2063 compareTypeExact (sym_link * dest, sym_link * src, int level)
2065 STORAGE_CLASS srcScls, destScls;
2076 /* if dest is a declarator then */
2081 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
2082 if ((DCL_TYPE (src) == ARRAY) && (DCL_ELEM (src) != DCL_ELEM (dest)))
2084 if (DCL_PTR_CONST (src) != DCL_PTR_CONST (dest))
2086 if (DCL_PTR_VOLATILE (src) != DCL_PTR_VOLATILE (dest))
2090 value *exargs, *acargs, *checkValue;
2092 /* verify function return type */
2093 if (!compareTypeExact (dest->next, src->next, -1))
2095 if (FUNC_ISISR (dest) != FUNC_ISISR (src))
2097 if (FUNC_REGBANK (dest) != FUNC_REGBANK (src))
2099 if (IFFUNC_ISNAKED (dest) != IFFUNC_ISNAKED (src))
2102 if (IFFUNC_ISREENT (dest) != IFFUNC_ISREENT (src) && argCnt>1)
2106 /* compare expected args with actual args */
2107 exargs = FUNC_ARGS(dest);
2108 acargs = FUNC_ARGS(src);
2110 /* for all the expected args do */
2111 for (; exargs && acargs; exargs = exargs->next, acargs = acargs->next)
2113 //checkTypeSanity(acargs->etype, acargs->name);
2115 if (IS_AGGREGATE (acargs->type))
2117 checkValue = copyValue (acargs);
2118 aggregateToPointer (checkValue);
2121 checkValue = acargs;
2124 if (!compareTypeExact (exargs->type, checkValue->type, -1))
2129 /* if one them ended we have a problem */
2130 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2131 (!exargs && acargs && !IS_VOID (acargs->type)))
2135 return compareTypeExact (dest->next, src->next, level);
2142 /* if one is a specifier and the other is not */
2143 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
2144 (IS_SPEC (dest) && !IS_SPEC (src)))
2147 /* if one of them is a void then ok */
2148 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
2151 /* if they are both bitfields then if the lengths
2152 and starts don't match */
2153 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
2154 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
2155 SPEC_BSTR (dest) != SPEC_BSTR (src)))
2158 if (IS_INTEGRAL (dest))
2160 /* signedness must match */
2161 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
2163 /* size must match */
2164 if (SPEC_LONG (dest) != SPEC_LONG (src))
2166 if (SPEC_SHORT (dest) != SPEC_SHORT (src))
2170 if (IS_STRUCT (dest))
2172 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
2176 if (SPEC_CONST (dest) != SPEC_CONST (src))
2178 if (SPEC_VOLATILE (dest) != SPEC_VOLATILE (src))
2180 if (SPEC_STAT (dest) != SPEC_STAT (src))
2182 if (SPEC_ABSA (dest) != SPEC_ABSA (src))
2184 if (SPEC_ABSA (dest) && SPEC_ADDR (dest) != SPEC_ADDR (src))
2187 destScls = SPEC_SCLS (dest);
2188 srcScls = SPEC_SCLS (src);
2190 /* Compensate for const to const code change in checkSClass() */
2191 if (!level & port->mem.code_ro && SPEC_CONST (dest))
2193 if (srcScls == S_CODE && destScls == S_FIXED)
2195 if (destScls == S_CODE && srcScls == S_FIXED)
2199 /* compensate for allocGlobal() */
2200 if ((srcScls == S_FIXED || srcScls == S_AUTO)
2201 && port->mem.default_globl_map == xdata
2205 if (level>0 && !SPEC_STAT (dest))
2207 /* Compensate for hack-o-matic in checkSClass() */
2208 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
2210 if (destScls == S_FIXED)
2211 destScls = (options.useXstack ? S_XSTACK : S_STACK);
2212 if (srcScls == S_FIXED)
2213 srcScls = (options.useXstack ? S_XSTACK : S_STACK);
2215 else if (TARGET_IS_DS390 || TARGET_IS_DS400 || options.useXstack)
2217 if (destScls == S_FIXED)
2219 if (srcScls == S_FIXED)
2224 if (srcScls != destScls)
2227 printf ("level = %d\n", level);
2228 printf ("SPEC_SCLS (src) = %d, SPEC_SCLS (dest) = %d\n",
2229 SPEC_SCLS (src), SPEC_SCLS (dest));
2230 printf ("srcScls = %d, destScls = %d\n",srcScls, destScls);
2238 /*------------------------------------------------------------------*/
2239 /* inCalleeSaveList - return 1 if found in callee save list */
2240 /*------------------------------------------------------------------*/
2242 calleeCmp(void *p1, void *p2)
2244 return (strcmp((char *)p1, (char *)(p2)) == 0);
2248 inCalleeSaveList(char *s)
2250 if (options.all_callee_saves)
2252 return isinSetWith(options.calleeSavesSet, s, calleeCmp);
2255 /*-----------------------------------------------------------------*/
2256 /* aggregateToPointer: change an agggregate type function */
2257 /* argument to a pointer to that type. */
2258 /*-----------------------------------------------------------------*/
2260 aggregateToPointer (value * val)
2262 if (IS_AGGREGATE (val->type))
2264 /* if this is a structure */
2265 /* then we need to add a new link */
2266 if (IS_STRUCT (val->type))
2268 /* first lets add DECLARATOR type */
2269 sym_link *p = val->type;
2271 werror (W_STRUCT_AS_ARG, val->name);
2272 val->type = newLink (DECLARATOR);
2273 val->type->next = p;
2276 /* change to a pointer depending on the */
2277 /* storage class specified */
2278 switch (SPEC_SCLS (val->etype))
2281 DCL_TYPE (val->type) = IPOINTER;
2284 DCL_TYPE (val->type) = PPOINTER;
2287 if (SPEC_OCLS(val->etype)) {
2288 DCL_TYPE(val->type)=PTR_TYPE(SPEC_OCLS(val->etype));
2290 // this happens for (external) function parameters
2291 DCL_TYPE (val->type) = port->unqualified_pointer;
2297 DCL_TYPE (val->type) = POINTER;
2300 DCL_TYPE (val->type) = CPOINTER;
2303 DCL_TYPE (val->type) = FPOINTER;
2306 DCL_TYPE (val->type) = EEPPOINTER;
2309 DCL_TYPE (val->type) = port->unqualified_pointer;
2312 /* is there is a symbol associated then */
2313 /* change the type of the symbol as well */
2316 val->sym->type = copyLinkChain (val->type);
2317 val->sym->etype = getSpec (val->sym->type);
2322 /*------------------------------------------------------------------*/
2323 /* checkFunction - does all kinds of check on a function */
2324 /*------------------------------------------------------------------*/
2326 checkFunction (symbol * sym, symbol *csym)
2328 value *exargs, *acargs;
2332 if (getenv("DEBUG_SANITY")) {
2333 fprintf (stderr, "checkFunction: %s ", sym->name);
2336 if (!IS_DECL(sym->type) || DCL_TYPE(sym->type)!=FUNCTION)
2338 werror(E_SYNTAX_ERROR, sym->name);
2342 /* make sure the type is complete and sane */
2343 checkTypeSanity(((symbol *)sym)->etype, ((symbol *)sym)->name);
2345 /* if not type then some kind of error */
2349 /* if the function has no type then make it return int */
2350 if (!sym->type->next)
2351 sym->type->next = sym->etype = newIntLink ();
2353 /* function cannot return aggregate */
2354 if (IS_AGGREGATE (sym->type->next))
2356 werror (E_FUNC_AGGR, sym->name);
2360 /* check if this function is defined as calleeSaves
2361 then mark it as such */
2362 FUNC_CALLEESAVES(sym->type) = inCalleeSaveList (sym->name);
2364 /* if interrupt service routine */
2365 /* then it cannot have arguments */
2366 if (IFFUNC_ARGS(sym->type) && FUNC_ISISR (sym->type))
2368 if (!IS_VOID(FUNC_ARGS(sym->type)->type)) {
2369 werror (E_INT_ARGS, sym->name);
2370 FUNC_ARGS(sym->type)=NULL;
2374 if (IFFUNC_ISSHADOWREGS(sym->type) && !FUNC_ISISR (sym->type))
2376 werror (E_SHADOWREGS_NO_ISR, sym->name);
2380 for (argCnt=1, acargs = FUNC_ARGS(sym->type);
2382 acargs=acargs->next, argCnt++) {
2384 // this can happen for reentrant functions
2385 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2386 // the show must go on: synthesize a name and symbol
2387 SNPRINTF (acargs->name, sizeof(acargs->name), "_%s_PARM_%d", sym->name, argCnt);
2388 acargs->sym = newSymbol (acargs->name, 1);
2389 SPEC_OCLS (acargs->etype) = istack;
2390 acargs->sym->type = copyLinkChain (acargs->type);
2391 acargs->sym->etype = getSpec (acargs->sym->type);
2392 acargs->sym->_isparm = 1;
2393 strncpyz (acargs->sym->rname, acargs->name, sizeof(acargs->sym->rname));
2394 } else if (strcmp(acargs->sym->name, acargs->sym->rname)==0) {
2396 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2401 if (!csym && !(csym = findSym (SymbolTab, sym, sym->name)))
2402 return 1; /* not defined nothing more to check */
2404 /* check if body already present */
2405 if (csym && IFFUNC_HASBODY(csym->type))
2407 werror (E_FUNC_BODY, sym->name);
2411 /* check the return value type */
2412 if (compareType (csym->type, sym->type) <= 0)
2414 werror (E_PREV_DEF_CONFLICT, csym->name, "type");
2415 printFromToType(csym->type, sym->type);
2419 if (FUNC_ISISR (csym->type) != FUNC_ISISR (sym->type))
2421 werror (E_PREV_DEF_CONFLICT, csym->name, "interrupt");
2424 /* I don't think this is necessary for interrupts. An isr is a */
2425 /* root in the calling tree. */
2426 if ((FUNC_REGBANK (csym->type) != FUNC_REGBANK (sym->type)) &&
2427 (!FUNC_ISISR (sym->type)))
2429 werror (E_PREV_DEF_CONFLICT, csym->name, "using");
2432 if (IFFUNC_ISNAKED (csym->type) != IFFUNC_ISNAKED (sym->type))
2434 werror (E_PREV_DEF_CONFLICT, csym->name, "_naked");
2437 /* Really, reentrant should match regardless of argCnt, but */
2438 /* this breaks some existing code (the fp lib functions). If */
2439 /* the first argument is always passed the same way, this */
2440 /* lax checking is ok (but may not be true for in future ports) */
2441 if (IFFUNC_ISREENT (csym->type) != IFFUNC_ISREENT (sym->type)
2444 //printf("argCnt = %d\n",argCnt);
2445 werror (E_PREV_DEF_CONFLICT, csym->name, "reentrant");
2448 if (IFFUNC_ISWPARAM (csym->type) != IFFUNC_ISWPARAM (sym->type))
2450 werror (E_PREV_DEF_CONFLICT, csym->name, "wparam");
2453 if (IFFUNC_ISSHADOWREGS (csym->type) != IFFUNC_ISSHADOWREGS (sym->type))
2455 werror (E_PREV_DEF_CONFLICT, csym->name, "shadowregs");
2459 /* compare expected args with actual args */
2460 exargs = FUNC_ARGS(csym->type);
2461 acargs = FUNC_ARGS(sym->type);
2463 /* for all the expected args do */
2466 exargs = exargs->next, acargs = acargs->next, argCnt++)
2468 if (getenv("DEBUG_SANITY")) {
2469 fprintf (stderr, "checkFunction: %s ", exargs->name);
2471 /* make sure the type is complete and sane */
2472 checkTypeSanity(exargs->etype, exargs->name);
2474 /* If the actual argument is an array, any prototype
2475 * will have modified it to a pointer. Duplicate that
2478 if (IS_AGGREGATE (acargs->type))
2480 checkValue = copyValue (acargs);
2481 aggregateToPointer (checkValue);
2485 checkValue = acargs;
2488 if (compareType (exargs->type, checkValue->type) <= 0)
2490 werror (E_ARG_TYPE, argCnt);
2491 printFromToType(exargs->type, checkValue->type);
2496 /* if one them ended we have a problem */
2497 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2498 (!exargs && acargs && !IS_VOID (acargs->type)))
2499 werror (E_ARG_COUNT);
2501 /* replace with this defition */
2502 sym->cdef = csym->cdef;
2503 deleteSym (SymbolTab, csym, csym->name);
2504 deleteFromSeg(csym);
2505 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
2506 if (IS_EXTERN (csym->etype) && !
2507 IS_EXTERN (sym->etype))
2509 addSet (&publics, sym);
2514 /*------------------------------------------------------------------*/
2515 /* cdbStructBlock - calls struct printing for a blcks */
2516 /*------------------------------------------------------------------*/
2517 void cdbStructBlock (int block)
2520 bucket **table = StructTab;
2523 /* go thru the entire table */
2524 for (i = 0; i < 256; i++)
2526 for (chain = table[i]; chain; chain = chain->next)
2528 if (chain->block >= block)
2531 debugFile->writeType((structdef *)chain->sym, chain->block, 0, NULL);
2537 /*-----------------------------------------------------------------*/
2538 /* processFuncArgs - does some processing with function args */
2539 /*-----------------------------------------------------------------*/
2541 processFuncArgs (symbol * func)
2545 sym_link *funcType=func->type;
2547 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
2548 fprintf (stderr, "SDCCsymt.c:processFuncArgs(%s)\n", func->name);
2550 /* find the function declaration within the type */
2551 while (funcType && !IS_FUNC(funcType))
2552 funcType=funcType->next;
2554 /* if this function has variable argument list */
2555 /* then make the function a reentrant one */
2556 if (IFFUNC_HASVARARGS(funcType) || (options.stackAuto && !func->cdef))
2557 FUNC_ISREENT(funcType)=1;
2559 /* check if this function is defined as calleeSaves
2560 then mark it as such */
2561 FUNC_CALLEESAVES(funcType) = inCalleeSaveList (func->name);
2563 /* loop thru all the arguments */
2564 val = FUNC_ARGS(funcType);
2566 /* if it is void then remove parameters */
2567 if (val && IS_VOID (val->type))
2569 FUNC_ARGS(funcType) = NULL;
2573 /* reset regparm for the port */
2574 (*port->reset_regparms) ();
2576 /* if any of the arguments is an aggregate */
2577 /* change it to pointer to the same type */
2581 char buffer[SDCC_NAME_MAX+1];
2583 SNPRINTF (buffer, sizeof(buffer), "%s parameter %d", func->name, pNum);
2584 checkTypeSanity (val->etype, buffer);
2586 /* mark it as a register parameter if
2587 the function does not have VA_ARG
2588 and as port dictates */
2589 if (!IFFUNC_HASVARARGS(funcType) &&
2590 (argreg = (*port->reg_parm) (val->type)))
2592 SPEC_REGPARM (val->etype) = 1;
2593 SPEC_ARGREG(val->etype) = argreg;
2594 } else if (IFFUNC_ISREENT(funcType)) {
2595 FUNC_HASSTACKPARM(funcType) = 1;
2598 if (IS_AGGREGATE (val->type))
2600 aggregateToPointer (val);
2607 /* if this is an internal generated function call */
2609 /* ignore --stack-auto for this one, we don't know how it is compiled */
2610 /* simply trust on --int-long-reent or --float-reent */
2611 if (IFFUNC_ISREENT(funcType)) {
2615 /* if this function is reentrant or */
2616 /* automatics r 2b stacked then nothing */
2617 if (IFFUNC_ISREENT (funcType) || options.stackAuto)
2621 val = FUNC_ARGS(funcType);
2626 /* if a symbolname is not given */
2627 /* synthesize a variable name */
2630 SNPRINTF (val->name, sizeof(val->name),
2631 "_%s_PARM_%d", func->name, pNum++);
2632 val->sym = newSymbol (val->name, 1);
2633 if (SPEC_SCLS(val->etype) == S_BIT)
2634 SPEC_OCLS (val->etype) = bit;
2636 SPEC_OCLS (val->etype) = port->mem.default_local_map;
2637 val->sym->type = copyLinkChain (val->type);
2638 val->sym->etype = getSpec (val->sym->type);
2639 val->sym->_isparm = 1;
2640 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2642 /* ?? static functions shouldn't imply static parameters - EEP */
2643 if (IS_SPEC(func->etype)) {
2644 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2645 SPEC_STAT (func->etype);
2648 addSymChain (&val->sym);
2651 else /* symbol name given create synth name */
2654 SNPRINTF (val->name, sizeof(val->name), "_%s_PARM_%d", func->name, pNum++);
2655 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2656 val->sym->_isparm = 1;
2657 if (SPEC_SCLS(val->etype) == S_BIT)
2658 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) = bit;
2660 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) =
2661 (options.model != MODEL_SMALL ? xdata : data);
2664 /* ?? static functions shouldn't imply static parameters - EEP */
2665 if (IS_SPEC(func->etype)) {
2666 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2667 SPEC_STAT (func->etype);
2671 if (!isinSet(operKeyReset, val->sym)) {
2672 addSet (&operKeyReset, val->sym);
2673 applyToSet (operKeyReset, resetParmKey);
2679 /*-----------------------------------------------------------------*/
2680 /* isSymbolEqual - compares two symbols return 1 if they match */
2681 /*-----------------------------------------------------------------*/
2683 isSymbolEqual (symbol * dest, symbol * src)
2685 /* if pointers match then equal */
2689 /* if one of them is null then don't match */
2693 /* if both of them have rname match on rname */
2694 if (dest->rname[0] && src->rname[0])
2695 return (!strcmp (dest->rname, src->rname));
2697 /* otherwise match on name */
2698 return (!strcmp (dest->name, src->name));
2701 void PT(sym_link *type)
2703 printTypeChain(type,0);
2705 /*-----------------------------------------------------------------*/
2706 /* printTypeChain - prints the type chain in human readable form */
2707 /*-----------------------------------------------------------------*/
2709 printTypeChain (sym_link * start, FILE * of)
2713 sym_link * type, * search;
2723 fprintf (of, "void");
2727 /* Print the chain as it is written in the source: */
2728 /* start with the last entry. */
2729 /* However, the storage class at the end of the */
2730 /* chain reall applies to the first in the chain! */
2732 for (type = start; type && type->next; type = type->next)
2735 scls=SPEC_SCLS(type);
2743 case S_DATA: fprintf (of, "data-"); break;
2744 case S_XDATA: fprintf (of, "xdata-"); break;
2745 case S_SFR: fprintf (of, "sfr-"); break;
2746 case S_SBIT: fprintf (of, "sbit-"); break;
2747 case S_CODE: fprintf (of, "code-"); break;
2748 case S_IDATA: fprintf (of, "idata-"); break;
2749 case S_PDATA: fprintf (of, "pdata-"); break;
2750 case S_LITERAL: fprintf (of, "literal-"); break;
2751 case S_STACK: fprintf (of, "stack-"); break;
2752 case S_XSTACK: fprintf (of, "xstack-"); break;
2753 case S_BIT: fprintf (of, "bit-"); break;
2754 case S_EEPROM: fprintf (of, "eeprom-"); break;
2761 if (!IS_FUNC(type)) {
2762 if (DCL_PTR_VOLATILE (type)) {
2763 fprintf (of, "volatile-");
2765 if (DCL_PTR_CONST (type)) {
2766 fprintf (of, "const-");
2769 switch (DCL_TYPE (type))
2772 fprintf (of, "function %s %s",
2773 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2774 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2776 for (args = FUNC_ARGS(type);
2779 printTypeChain(args->type, of);
2786 fprintf (of, "generic* ");
2789 fprintf (of, "code* ");
2792 fprintf (of, "xdata* ");
2795 fprintf (of, "eeprom* ");
2798 fprintf (of, "near* ");
2801 fprintf (of, "idata* ");
2804 fprintf (of, "pdata* ");
2807 fprintf (of, "unknown* ");
2810 if (DCL_ELEM(type)) {
2811 fprintf (of, "[%d] ", DCL_ELEM(type));
2813 fprintf (of, "[] ");
2820 if (SPEC_VOLATILE (type))
2821 fprintf (of, "volatile-");
2822 if (SPEC_CONST (type))
2823 fprintf (of, "const-");
2824 if (SPEC_USIGN (type))
2825 fprintf (of, "unsigned-");
2826 switch (SPEC_NOUN (type))
2830 fprintf (of, "long-");
2831 fprintf (of, "int");
2835 fprintf (of, "char");
2839 fprintf (of, "void");
2843 fprintf (of, "float");
2847 fprintf (of, "fixed16x16");
2851 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2855 fprintf (of, "sbit");
2859 fprintf (of, "bit");
2863 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2867 fprintf (of, "double");
2871 fprintf (of, "unknown type");
2875 /* search entry in list before "type" */
2876 for (search = start; search && search->next != type;)
2877 search = search->next;
2886 /*--------------------------------------------------------------------*/
2887 /* printTypeChainRaw - prints the type chain in human readable form */
2888 /* in the raw data structure ordering */
2889 /*--------------------------------------------------------------------*/
2891 printTypeChainRaw (sym_link * start, FILE * of)
2904 fprintf (of, "void");
2914 if (!IS_FUNC(type)) {
2915 if (DCL_PTR_VOLATILE (type)) {
2916 fprintf (of, "volatile-");
2918 if (DCL_PTR_CONST (type)) {
2919 fprintf (of, "const-");
2922 switch (DCL_TYPE (type))
2925 fprintf (of, "function %s %s",
2926 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2927 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2929 for (args = FUNC_ARGS(type);
2932 printTypeChain(args->type, of);
2939 fprintf (of, "generic* ");
2942 fprintf (of, "code* ");
2945 fprintf (of, "xdata* ");
2948 fprintf (of, "eeprom* ");
2951 fprintf (of, "near* ");
2954 fprintf (of, "idata* ");
2957 fprintf (of, "pdata* ");
2960 fprintf (of, "unknown* ");
2963 if (DCL_ELEM(type)) {
2964 fprintf (of, "[%d] ", DCL_ELEM(type));
2966 fprintf (of, "[] ");
2970 if (DCL_TSPEC(type))
2973 printTypeChainRaw(DCL_TSPEC(type), of);
2977 else if (IS_SPEC (type))
2979 switch (SPEC_SCLS (type))
2981 case S_DATA: fprintf (of, "data-"); break;
2982 case S_XDATA: fprintf (of, "xdata-"); break;
2983 case S_SFR: fprintf (of, "sfr-"); break;
2984 case S_SBIT: fprintf (of, "sbit-"); break;
2985 case S_CODE: fprintf (of, "code-"); break;
2986 case S_IDATA: fprintf (of, "idata-"); break;
2987 case S_PDATA: fprintf (of, "pdata-"); break;
2988 case S_LITERAL: fprintf (of, "literal-"); break;
2989 case S_STACK: fprintf (of, "stack-"); break;
2990 case S_XSTACK: fprintf (of, "xstack-"); break;
2991 case S_BIT: fprintf (of, "bit-"); break;
2992 case S_EEPROM: fprintf (of, "eeprom-"); break;
2995 if (SPEC_VOLATILE (type))
2996 fprintf (of, "volatile-");
2997 if (SPEC_CONST (type))
2998 fprintf (of, "const-");
2999 if (SPEC_USIGN (type))
3000 fprintf (of, "unsigned-");
3001 switch (SPEC_NOUN (type))
3005 fprintf (of, "long-");
3006 fprintf (of, "int");
3010 fprintf (of, "char");
3014 fprintf (of, "void");
3018 fprintf (of, "float");
3022 fprintf (of, "fixed16x16");
3026 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
3030 fprintf (of, "sbit");
3034 fprintf (of, "bit");
3038 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
3042 fprintf (of, "double");
3046 fprintf (of, "unknown type");
3051 fprintf (of, "NOT_SPEC_OR_DECL");
3061 /*-----------------------------------------------------------------*/
3062 /* powof2 - returns power of two for the number if number is pow 2 */
3063 /*-----------------------------------------------------------------*/
3065 powof2 (TYPE_UDWORD num)
3078 if (n1s > 1 || nshifts == 0)
3094 symbol *__fps16x16_add;
3095 symbol *__fps16x16_sub;
3096 symbol *__fps16x16_mul;
3097 symbol *__fps16x16_div;
3098 symbol *__fps16x16_eq;
3099 symbol *__fps16x16_neq;
3100 symbol *__fps16x16_lt;
3101 symbol *__fps16x16_lteq;
3102 symbol *__fps16x16_gt;
3103 symbol *__fps16x16_gteq;
3105 /* Dims: mul/div/mod, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
3106 symbol *__muldiv[3][3][2];
3107 /* Dims: BYTE/WORD/DWORD SIGNED/UNSIGNED */
3108 sym_link *__multypes[3][2];
3109 /* Dims: to/from float, BYTE/WORD/DWORD, SIGNED/USIGNED */
3110 symbol *__conv[2][3][2];
3111 /* Dims: to/from fixed16x16, BYTE/WORD/DWORD/FLOAT, SIGNED/USIGNED */
3112 symbol *__fp16x16conv[2][4][2];
3113 /* Dims: shift left/shift right, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
3114 symbol *__rlrr[2][3][2];
3116 sym_link *floatType;
3117 sym_link *fixed16x16Type;
3120 _mangleFunctionName(char *in)
3122 if (port->getMangledFunctionName)
3124 return port->getMangledFunctionName(in);
3132 /*-----------------------------------------------------------------*/
3133 /* typeFromStr - create a typechain from an encoded string */
3134 /* basic types - 'c' - char */
3139 /* 'q' - fixed16x16 */
3141 /* '*' - pointer - default (GPOINTER) */
3142 /* modifiers - 'u' - unsigned */
3143 /* pointer modifiers - 'g' - generic */
3147 /* 'F' - function */
3148 /* examples : "ig*" - generic int * */
3149 /* "cx*" - char xdata * */
3150 /* "ui" - unsigned int */
3151 /*-----------------------------------------------------------------*/
3152 sym_link *typeFromStr (char *s)
3154 sym_link *r = newLink(DECLARATOR);
3166 r->class = SPECIFIER;
3167 SPEC_NOUN(r) = V_CHAR;
3171 r->class = SPECIFIER;
3172 SPEC_NOUN(r) = V_INT;
3175 r->class = SPECIFIER;
3176 SPEC_NOUN(r) = V_INT;
3180 r->class = SPECIFIER;
3181 SPEC_NOUN(r) = V_FLOAT;
3184 r->class = SPECIFIER;
3185 SPEC_NOUN(r) = V_FIXED16X16;
3188 r->class = SPECIFIER;
3189 SPEC_NOUN(r) = V_VOID;
3192 DCL_TYPE(r) = port->unqualified_pointer;
3199 assert(*(s+1)=='*');
3200 nr = newLink(DECLARATOR);
3205 DCL_TYPE(r) = GPOINTER;
3208 DCL_TYPE(r) = FPOINTER;
3211 DCL_TYPE(r) = CPOINTER;
3214 DCL_TYPE(r) = POINTER;
3217 DCL_TYPE(r) = FUNCTION;
3218 nr = newLink(DECLARATOR);
3221 DCL_TYPE(r) = CPOINTER;
3227 werror(E_INTERNAL_ERROR, __FILE__, __LINE__,
3228 "typeFromStr: unknown type");
3231 if (IS_SPEC(r) && usign) {
3240 /*-----------------------------------------------------------------*/
3241 /* initCSupport - create functions for C support routines */
3242 /*-----------------------------------------------------------------*/
3246 const char *smuldivmod[] =
3250 const char *sbwd[] =
3252 "char", "int", "long", "fixed16x16",
3254 const char *fp16x16sbwd[] =
3256 "char", "int", "long", "float",
3262 const char *srlrr[] =
3267 int bwd, su, muldivmod, tofrom, rlrr;
3269 if (getenv("SDCC_NO_C_SUPPORT")) {
3270 /* for debugging only */
3274 floatType = newFloatLink ();
3275 fixed16x16Type = newFixed16x16Link ();
3277 for (bwd = 0; bwd < 3; bwd++)
3294 __multypes[bwd][0] = l;
3295 __multypes[bwd][1] = copyLinkChain (l);
3296 SPEC_USIGN (__multypes[bwd][1]) = 1;
3299 __fsadd = funcOfType ("__fsadd", floatType, floatType, 2, options.float_rent);
3300 __fssub = funcOfType ("__fssub", floatType, floatType, 2, options.float_rent);
3301 __fsmul = funcOfType ("__fsmul", floatType, floatType, 2, options.float_rent);
3302 __fsdiv = funcOfType ("__fsdiv", floatType, floatType, 2, options.float_rent);
3303 __fseq = funcOfType ("__fseq", CHARTYPE, floatType, 2, options.float_rent);
3304 __fsneq = funcOfType ("__fsneq", CHARTYPE, floatType, 2, options.float_rent);
3305 __fslt = funcOfType ("__fslt", CHARTYPE, floatType, 2, options.float_rent);
3306 __fslteq = funcOfType ("__fslteq", CHARTYPE, floatType, 2, options.float_rent);
3307 __fsgt = funcOfType ("__fsgt", CHARTYPE, floatType, 2, options.float_rent);
3308 __fsgteq = funcOfType ("__fsgteq", CHARTYPE, floatType, 2, options.float_rent);
3310 __fps16x16_add = funcOfType ("__fps16x16_add", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3311 __fps16x16_sub = funcOfType ("__fps16x16_sub", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3312 __fps16x16_mul = funcOfType ("__fps16x16_mul", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3313 __fps16x16_div = funcOfType ("__fps16x16_div", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3314 __fps16x16_eq = funcOfType ("__fps16x16_eq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3315 __fps16x16_neq = funcOfType ("__fps16x16_neq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3316 __fps16x16_lt = funcOfType ("__fps16x16_lt", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3317 __fps16x16_lteq = funcOfType ("__fps16x16_lteq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3318 __fps16x16_gt = funcOfType ("__fps16x16_gt", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3319 __fps16x16_gteq = funcOfType ("__fps16x16_gteq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3322 for (tofrom = 0; tofrom < 2; tofrom++)
3324 for (bwd = 0; bwd < 3; bwd++)
3326 for (su = 0; su < 2; su++)
3330 SNPRINTF (buffer, sizeof(buffer), "__fs2%s%s", ssu[su], sbwd[bwd]);
3331 __conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], floatType, 1, options.float_rent);
3335 SNPRINTF (buffer, sizeof(buffer), "__%s%s2fs", ssu[su], sbwd[bwd]);
3336 __conv[tofrom][bwd][su] = funcOfType (buffer, floatType, __multypes[bwd][su], 1, options.float_rent);
3342 for (tofrom = 0; tofrom < 2; tofrom++)
3344 for (bwd = 0; bwd < 4; bwd++)
3346 for (su = 0; su < 2; su++)
3350 SNPRINTF (buffer, sizeof(buffer), "__fps16x162%s%s", ssu[su], fp16x16sbwd[bwd]);
3352 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, floatType, fixed16x16Type, 1, options.float_rent);
3354 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], fixed16x16Type, 1, options.float_rent);
3358 SNPRINTF (buffer, sizeof(buffer), "__%s%s2fps16x16", ssu[su], fp16x16sbwd[bwd]);
3360 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, fixed16x16Type, floatType, 1, options.float_rent);
3362 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, fixed16x16Type, __multypes[bwd][su], 1, options.float_rent);
3369 for (muldivmod = 0; muldivmod < 3; muldivmod++)
3371 for (bwd = 0; bwd < 3; bwd++)
3373 for (su = 0; su < 2; su++)
3375 SNPRINTF (buffer, sizeof(buffer),
3377 smuldivmod[muldivmod],
3380 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3381 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3386 muluint() and mulsint() resp. mululong() and mulslong() return the same result.
3387 Therefore they've been merged into mulint() and mullong().
3390 for (bwd = 0; bwd < 3; bwd++)
3392 for (su = 0; su < 2; su++)
3394 for (muldivmod = 1; muldivmod < 3; muldivmod++)
3397 SNPRINTF (buffer, sizeof(buffer),
3399 smuldivmod[muldivmod],
3402 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3403 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3411 for (su = 0; su < 2; su++)
3413 /* muluchar and mulschar are still separate functions, because e.g. the z80
3414 port is sign/zero-extending to int before calling mulint() */
3415 SNPRINTF (buffer, sizeof(buffer),
3417 smuldivmod[muldivmod],
3420 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3421 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3425 /* word and doubleword */
3426 for (bwd = 1; bwd < 3; bwd++)
3429 SNPRINTF (buffer, sizeof(buffer),
3431 smuldivmod[muldivmod],
3433 __muldiv[muldivmod][bwd][0] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3434 FUNC_NONBANKED (__muldiv[muldivmod][bwd][0]->type) = 1;
3435 /* signed = unsigned */
3436 __muldiv[muldivmod][bwd][1] = __muldiv[muldivmod][bwd][0];
3439 for (rlrr = 0; rlrr < 2; rlrr++)
3441 for (bwd = 0; bwd < 3; bwd++)
3443 for (su = 0; su < 2; su++)
3445 SNPRINTF (buffer, sizeof(buffer),
3450 __rlrr[rlrr][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[0][0], 2, options.intlong_rent);
3451 FUNC_NONBANKED (__rlrr[rlrr][bwd][su]->type) = 1;
3457 /*-----------------------------------------------------------------*/
3458 /* initBuiltIns - create prototypes for builtin functions */
3459 /*-----------------------------------------------------------------*/
3465 if (!port->builtintable) return ;
3467 for (i = 0 ; port->builtintable[i].name ; i++) {
3468 sym = funcOfTypeVarg(port->builtintable[i].name,port->builtintable[i].rtype,
3469 port->builtintable[i].nParms,port->builtintable[i].parm_types);
3470 FUNC_ISBUILTIN(sym->type) = 1;
3471 FUNC_ISREENT(sym->type) = 0; /* can never be reentrant */
3475 sym_link *validateLink(sym_link *l,
3482 if (l && l->class==select)
3487 "Internal error: validateLink failed in %s(%s) @ %s:%u:"
3488 " expected %s, got %s\n",
3489 macro, args, file, line,
3490 DECLSPEC2TXT(select), l ? DECLSPEC2TXT(l->class) : "null-link");
3492 return l; // never reached, makes compiler happy.
3495 /*--------------------------------------------------------------------*/
3496 /* newEnumType - create an integer type compatible with enumerations */
3497 /*--------------------------------------------------------------------*/
3499 newEnumType (symbol *enumlist)
3507 type = newLink (SPECIFIER);
3508 SPEC_NOUN (type) = V_INT;
3512 /* Determine the range of the enumerated values */
3514 min = max = (int) floatFromVal (valFromType (sym->type));
3515 for (sym = sym->next; sym; sym = sym->next)
3517 v = (int) floatFromVal (valFromType (sym->type));
3524 /* Determine the smallest integer type that is compatible with this range */
3525 type = newLink (SPECIFIER);
3526 if (min>=0 && max<=255)
3528 SPEC_NOUN (type) = V_CHAR;
3529 SPEC_USIGN (type) = 1;
3531 else if (min>=-128 && max<=127)
3533 SPEC_NOUN (type) = V_CHAR;
3535 else if (min>=0 && max<=65535)
3537 SPEC_NOUN (type) = V_INT;
3538 SPEC_USIGN (type) = 1;
3540 else if (min>=-32768 && max<=32767)
3542 SPEC_NOUN (type) = V_INT;
3546 SPEC_NOUN (type) = V_INT;
3547 SPEC_LONG (type) = 1;
3549 SPEC_USIGN (type) = 1;