1 /*-------------------------------------------------------------------------
2 SDCCsymt.c - Code file for Symbols table related structures and MACRO's.
3 Written By - Sandeep Dutta . sandeep.dutta@usa.net (1998)
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published by the
7 Free Software Foundation; either version 2, or (at your option) any
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 In other words, you are welcome to use, share and improve this program.
20 You are forbidden to forbid anyone else to use, share and improve
21 what you give them. Help stamp out software-hoarding!
22 -------------------------------------------------------------------------*/
29 value *aggregateToPointer (value *val);
30 void printTypeChainRaw (sym_link * start, FILE * of);
32 void printFromToType(sym_link *from, sym_link *to) {
33 fprintf (stderr, "from type '");
34 printTypeChain (from, stderr);
35 fprintf (stderr, "'\nto type '");
36 printTypeChain (to, stderr);
37 fprintf (stderr, "'\n");
41 char *nounName(sym_link *sl) {
42 switch (SPEC_NOUN(sl))
45 if (SPEC_LONG(sl)) return "long";
46 if (sl->select.s._short) return "short";
49 case V_FLOAT: return "float";
50 case V_CHAR: return "char";
51 case V_VOID: return "void";
52 case V_STRUCT: return "struct";
53 case V_LABEL: return "label";
54 case V_BITFIELD: return "bitfield";
55 case V_BIT: return "bit";
56 case V_SBIT: return "sbit";
57 case V_DOUBLE: return "double";
62 bucket *SymbolTab[256]; /* the symbol table */
63 bucket *StructTab[256]; /* the structure table */
64 bucket *TypedefTab[256]; /* the typedef table */
65 bucket *LabelTab[256]; /* the Label table */
66 bucket *enumTab[256]; /* enumerated table */
68 /*------------------------------------------------------------------*/
69 /* initSymt () - initialises symbol table related stuff */
70 /*------------------------------------------------------------------*/
76 for (i = 0; i < 256; i++)
77 SymbolTab[i] = StructTab[i] = (void *) NULL;
81 /*-----------------------------------------------------------------*/
82 /* newBucket - allocates & returns a new bucket */
83 /*-----------------------------------------------------------------*/
89 bp = Safe_alloc ( sizeof (bucket));
94 /*-----------------------------------------------------------------*/
95 /* hashKey - computes the hashkey given a symbol name */
96 /*-----------------------------------------------------------------*/
98 hashKey (const char *s)
100 unsigned long key = 0;
107 /*-----------------------------------------------------------------*/
108 /* addSym - adds a symbol to the hash Table */
109 /*-----------------------------------------------------------------*/
111 addSym (bucket ** stab,
118 int i; /* index into the hash Table */
119 bucket *bp; /* temp bucket * */
122 symbol *csym = (symbol *)sym;
124 if (getenv("DEBUG_SANITY")) {
125 fprintf (stderr, "addSym: %s ", sname);
127 /* make sure the type is complete and sane */
128 checkTypeSanity(csym->etype, csym->name);
131 /* prevent overflow of the (r)name buffers */
132 if (strlen(sname)>SDCC_SYMNAME_MAX) {
133 werror (W_SYMBOL_NAME_TOO_LONG, SDCC_SYMNAME_MAX);
134 sname[SDCC_SYMNAME_MAX]='\0';
137 /* the symbols are always added at the head of the list */
139 /* get a free entry */
140 bp = Safe_alloc ( sizeof (bucket));
142 bp->sym = sym; /* update the symbol pointer */
143 bp->level = level; /* update the nest level */
145 strncpyz (bp->name, sname, sizeof(bp->name)); /* copy the name into place */
147 /* if this is the first entry */
150 bp->prev = bp->next = (void *) NULL; /* point to nothing */
153 /* not first entry then add @ head of list */
163 /*-----------------------------------------------------------------*/
164 /* deleteSym - deletes a symbol from the hash Table entry */
165 /*-----------------------------------------------------------------*/
167 deleteSym (bucket ** stab, void *sym, char *sname)
175 /* find the symbol */
178 if (bp->sym == sym) /* found it then break out */
179 break; /* of the loop */
183 if (!bp) /* did not find it */
185 /* if this is the first one in the chain */
189 if (stab[i]) /* if chain ! empty */
190 stab[i]->prev = (void *) NULL;
192 /* middle || end of chain */
195 if (bp->next) /* if not end of chain */
196 bp->next->prev = bp->prev;
198 bp->prev->next = bp->next;
203 /*-----------------------------------------------------------------*/
204 /* findSym - finds a symbol in a table */
205 /*-----------------------------------------------------------------*/
207 findSym (bucket ** stab, void *sym, const char *sname)
211 bp = stab[hashKey (sname)];
214 if (bp->sym == sym || strcmp (bp->name, sname) == 0)
219 return (bp ? bp->sym : (void *) NULL);
222 /*-----------------------------------------------------------------*/
223 /* findSymWithLevel - finds a symbol with a name & level */
224 /*-----------------------------------------------------------------*/
226 findSymWithLevel (bucket ** stab, symbol * sym)
230 bp = stab[hashKey (sym->name)];
233 ** do the search from the head of the list since the
234 ** elements are added at the head it is ensured that
235 ** we will find the deeper definitions before we find
236 ** the global ones. we need to check for symbols with
237 ** level <= to the level given, if levels match then block
238 ** numbers need to match as well
242 if (strcmp (bp->name, sym->name) == 0 && bp->level <= sym->level)
244 /* if this is parameter then nothing else need to be checked */
245 if (((symbol *) (bp->sym))->_isparm)
247 /* if levels match then block numbers should also match */
248 if (bp->level && bp->level == sym->level && bp->block == sym->block)
250 /* if levels don't match then we are okay */
251 if (bp->level && bp->level != sym->level && bp->block <= sym->block)
253 /* if this is a global variable then we are ok too */
261 return (void *) NULL;
264 /*-----------------------------------------------------------------*/
265 /* findSymWithBlock - finds a symbol with name in with a block */
266 /*-----------------------------------------------------------------*/
268 findSymWithBlock (bucket ** stab, symbol * sym, int block)
272 bp = stab[hashKey (sym->name)];
275 if (strcmp (bp->name, sym->name) == 0 &&
281 return (bp ? bp->sym : (void *) NULL);
284 /*------------------------------------------------------------------*/
285 /* newSymbol () - returns a new pointer to a symbol */
286 /*------------------------------------------------------------------*/
288 newSymbol (char *name, int scope)
292 sym = Safe_alloc ( sizeof (symbol));
294 strncpyz (sym->name, name, sizeof(sym->name)); /* copy the name */
295 sym->level = scope; /* set the level */
296 sym->block = currBlockno;
297 sym->lineDef = mylineno; /* set the line number */
298 sym->fileDef = currFname;
302 /*------------------------------------------------------------------*/
303 /* newLink - creates a new link (declarator,specifier) */
304 /*------------------------------------------------------------------*/
306 newLink (SYM_LINK_CLASS select)
310 p = Safe_alloc ( sizeof (sym_link));
316 /*------------------------------------------------------------------*/
317 /* newStruct - creats a new structdef from the free list */
318 /*------------------------------------------------------------------*/
320 newStruct (char *tag)
324 s = Safe_alloc ( sizeof (structdef));
326 strncpyz (s->tag, tag, sizeof(s->tag)); /* copy the tag */
330 /*------------------------------------------------------------------*/
331 /* sclsFromPtr - Return the storage class a pointer points into. */
332 /* S_FIXED is returned for generic pointers or other */
333 /* unexpected cases */
334 /*------------------------------------------------------------------*/
336 sclsFromPtr(sym_link *ptr)
338 switch (DCL_TYPE (ptr))
361 /*------------------------------------------------------------------*/
362 /* pointerTypes - do the computation for the pointer types */
363 /*------------------------------------------------------------------*/
365 pointerTypes (sym_link * ptr, sym_link * type)
370 /* find the first pointer type */
371 while (ptr && !IS_PTR (ptr))
374 /* could not find it */
375 if (!ptr || IS_SPEC (ptr))
378 if (IS_PTR(ptr) && DCL_TYPE(ptr)!=UPOINTER) {
379 pointerTypes (ptr->next, type);
383 /* change the pointer type depending on the
384 storage class of the type */
387 switch (SPEC_SCLS (type))
390 DCL_TYPE (ptr) = FPOINTER;
393 DCL_TYPE (ptr) = IPOINTER;
396 DCL_TYPE (ptr) = PPOINTER;
399 DCL_TYPE (ptr) = POINTER;
402 DCL_TYPE (ptr) = CPOINTER;
405 DCL_TYPE (ptr) = EEPPOINTER;
408 DCL_TYPE (ptr) = port->unqualified_pointer;
411 /* the storage class of type ends here */
412 SPEC_SCLS (type) = 0;
415 /* now change all the remaining unknown pointers
416 to generic pointers */
419 if (!IS_SPEC (ptr) && DCL_TYPE (ptr) == UPOINTER)
420 DCL_TYPE (ptr) = port->unqualified_pointer;
424 /* same for the type although it is highly unlikely that
425 type will have a pointer */
428 if (!IS_SPEC (type) && DCL_TYPE (type) == UPOINTER)
429 DCL_TYPE (type) = port->unqualified_pointer;
434 /*------------------------------------------------------------------*/
435 /* addDecl - adds a declarator @ the end of a chain */
436 /*------------------------------------------------------------------*/
438 addDecl (symbol * sym, int type, sym_link * p)
444 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
445 fprintf (stderr, "SDCCsymt.c:addDecl(%s,%d,%p)\n", sym->name, type, p);
447 /* if we are passed a link then set head & tail */
456 head = tail = newLink (DECLARATOR);
457 DCL_TYPE (head) = type;
460 /* if this is the first entry */
468 if (IS_SPEC (sym->etype) && IS_SPEC (head) && head == tail)
470 sym->etype = mergeSpec (sym->etype, head, sym->name);
474 if (IS_SPEC (sym->etype) && !IS_SPEC (head) && head == tail)
477 while (t->next != sym->etype)
480 tail->next = sym->etype;
484 sym->etype->next = head;
490 /* if the type is an unknown pointer and has
491 a tspec then take the storage class const & volatile
492 attribute from the tspec & make it those of this
496 //DCL_TYPE (p) == UPOINTER &&
499 if (!IS_SPEC (sym->etype))
501 sym->etype = sym->etype->next = newLink (SPECIFIER);
503 SPEC_SCLS (sym->etype) = SPEC_SCLS (DCL_TSPEC (p));
504 DCL_TSPEC (p) = NULL;
507 // if there is a function in this type chain
508 if (p && funcInChain(sym->type)) {
509 processFuncArgs (sym);
515 /*------------------------------------------------------------------
516 checkTypeSanity: prevent the user from doing e.g.:
518 ------------------------------------------------------------------*/
519 void checkTypeSanity(sym_link *etype, char *name) {
523 if (getenv("DEBUG_SANITY")) {
524 fprintf (stderr, "sanity check skipped for %s (etype==0)\n", name);
529 if (!IS_SPEC(etype)) {
530 if (getenv("DEBUG_SANITY")) {
531 fprintf (stderr, "sanity check skipped for %s (!IS_SPEC)\n", name);
536 noun=nounName(etype);
538 if (getenv("DEBUG_SANITY")) {
539 fprintf (stderr, "checking sanity for %s %p\n", name, etype);
542 if ((SPEC_NOUN(etype)==V_CHAR ||
543 SPEC_NOUN(etype)==V_FLOAT ||
544 SPEC_NOUN(etype)==V_DOUBLE ||
545 SPEC_NOUN(etype)==V_VOID) &&
546 (etype->select.s._short || SPEC_LONG(etype))) {
547 // long or short for char float double or void
548 werror (E_LONG_OR_SHORT_INVALID, noun, name);
550 if ((SPEC_NOUN(etype)==V_FLOAT ||
551 SPEC_NOUN(etype)==V_DOUBLE ||
552 SPEC_NOUN(etype)==V_VOID) &&
553 (etype->select.s._signed || SPEC_USIGN(etype))) {
554 // signed or unsigned for float double or void
555 werror (E_SIGNED_OR_UNSIGNED_INVALID, noun, name);
558 // special case for "short"
559 if (etype->select.s._short) {
560 SPEC_NOUN(etype) = options.shortis8bits ? V_CHAR : V_INT;
561 etype->select.s._short = 0;
565 "const a;" or "data b;" or "signed s" or "long l"
567 if (!SPEC_NOUN(etype)) {
568 SPEC_NOUN(etype)=V_INT;
571 /* ISO/IEC 9899 J.3.9 implementation defined behaviour: */
572 /* a "plain" int bitfield is unsigned */
573 if (SPEC_NOUN(etype)==V_BIT ||
574 SPEC_NOUN(etype)==V_SBIT) {
575 if (!etype->select.s._signed)
576 SPEC_USIGN(etype) = 1;
579 if (etype->select.s._signed && SPEC_USIGN(etype)) {
580 // signed AND unsigned
581 werror (E_SIGNED_AND_UNSIGNED_INVALID, noun, name);
583 if (etype->select.s._short && SPEC_LONG(etype)) {
585 werror (E_LONG_AND_SHORT_INVALID, noun, name);
590 /*------------------------------------------------------------------*/
591 /* mergeSpec - merges two specifiers and returns the new one */
592 /*------------------------------------------------------------------*/
594 mergeSpec (sym_link * dest, sym_link * src, char *name)
596 if (!IS_SPEC(dest) || !IS_SPEC(src)) {
598 werror (E_INTERNAL_ERROR, __FILE__, __LINE__, "cannot merge declarator");
601 werror (E_SYNTAX_ERROR, yytext);
602 // the show must go on
607 if (SPEC_NOUN(src)) {
608 if (!SPEC_NOUN(dest)) {
609 SPEC_NOUN(dest)=SPEC_NOUN(src);
611 /* we shouldn't redeclare the type */
612 if (getenv("DEBUG_SANITY")) {
613 fprintf (stderr, "mergeSpec: ");
615 werror(E_TWO_OR_MORE_DATA_TYPES, name);
619 if (SPEC_SCLS(src)) {
620 /* if destination has no storage class */
621 if (!SPEC_SCLS (dest) || SPEC_SCLS(dest)==S_REGISTER) {
622 SPEC_SCLS (dest) = SPEC_SCLS (src);
624 if (getenv("DEBUG_SANITY")) {
625 fprintf (stderr, "mergeSpec: ");
627 werror(E_TWO_OR_MORE_STORAGE_CLASSES, name);
631 /* copy all the specifications */
633 // we really should do:
635 if (SPEC_what(src)) {
636 if (SPEC_what(dest)) {
637 werror(W_DUPLICATE_SPEC, "what");
639 SPEC_what(dst)|=SPEC_what(src);
642 // but there are more important thing right now
644 SPEC_LONG (dest) |= SPEC_LONG (src);
645 dest->select.s._short|=src->select.s._short;
646 SPEC_USIGN (dest) |= SPEC_USIGN (src);
647 dest->select.s._signed|=src->select.s._signed;
648 SPEC_STAT (dest) |= SPEC_STAT (src);
649 SPEC_EXTR (dest) |= SPEC_EXTR (src);
650 SPEC_CONST(dest) |= SPEC_CONST (src);
651 SPEC_ABSA (dest) |= SPEC_ABSA (src);
652 SPEC_VOLATILE (dest) |= SPEC_VOLATILE (src);
653 SPEC_ADDR (dest) |= SPEC_ADDR (src);
654 SPEC_OCLS (dest) = SPEC_OCLS (src);
655 SPEC_BLEN (dest) |= SPEC_BLEN (src);
656 SPEC_BSTR (dest) |= SPEC_BSTR (src);
657 SPEC_TYPEDEF (dest) |= SPEC_TYPEDEF (src);
658 SPEC_ENUM (dest) |= SPEC_ENUM (src);
659 if (SPEC_ARGREG(src) && !SPEC_ARGREG(dest))
660 SPEC_ARGREG(dest) = SPEC_ARGREG(src);
662 if (IS_STRUCT (dest) && SPEC_STRUCT (dest) == NULL)
663 SPEC_STRUCT (dest) = SPEC_STRUCT (src);
665 /* these are the only function attributes that will be set
666 in a specifier while parsing */
667 FUNC_NONBANKED(dest) |= FUNC_NONBANKED(src);
668 FUNC_BANKED(dest) |= FUNC_BANKED(src);
669 FUNC_ISCRITICAL(dest) |= FUNC_ISCRITICAL(src);
670 FUNC_ISREENT(dest) |= FUNC_ISREENT(src);
671 FUNC_ISNAKED(dest) |= FUNC_ISNAKED(src);
672 FUNC_ISISR(dest) |= FUNC_ISISR(src);
673 FUNC_ISJAVANATIVE(dest) |= FUNC_ISJAVANATIVE(src);
674 FUNC_ISBUILTIN(dest) |= FUNC_ISBUILTIN(src);
675 FUNC_ISOVERLAY(dest) |= FUNC_ISOVERLAY(src);
676 FUNC_INTNO(dest) |= FUNC_INTNO(src);
677 FUNC_REGBANK(dest) |= FUNC_REGBANK(src);
682 /*------------------------------------------------------------------*/
683 /* genSymName - generates and returns a name used for anonymous vars */
684 /*------------------------------------------------------------------*/
686 genSymName (int level)
688 static int gCount = 0;
689 static char gname[SDCC_NAME_MAX + 1];
691 SNPRINTF (gname, sizeof(gname), "__%04d%04d", level, gCount++);
695 /*------------------------------------------------------------------*/
696 /* getSpec - returns the specifier part from a declaration chain */
697 /*------------------------------------------------------------------*/
699 getSpec (sym_link * p)
704 while (p && !(IS_SPEC (p)))
710 /*------------------------------------------------------------------*/
711 /* newCharLink() - creates an char type */
712 /*------------------------------------------------------------------*/
718 p = newLink (SPECIFIER);
719 SPEC_NOUN (p) = V_CHAR;
724 /*------------------------------------------------------------------*/
725 /* newFloatLink - a new Float type */
726 /*------------------------------------------------------------------*/
732 p = newLink (SPECIFIER);
733 SPEC_NOUN (p) = V_FLOAT;
738 /*------------------------------------------------------------------*/
739 /* newLongLink() - new long type */
740 /*------------------------------------------------------------------*/
746 p = newLink (SPECIFIER);
747 SPEC_NOUN (p) = V_INT;
753 /*------------------------------------------------------------------*/
754 /* newIntLink() - creates an int type */
755 /*------------------------------------------------------------------*/
761 p = newLink (SPECIFIER);
762 SPEC_NOUN (p) = V_INT;
767 /*------------------------------------------------------------------*/
768 /* getSize - returns size of a type chain in bits */
769 /*------------------------------------------------------------------*/
771 getSize (sym_link * p)
773 /* if nothing return 0 */
777 { /* if this is the specifier then */
778 switch (SPEC_NOUN (p))
779 { /* depending on the specifier type */
781 return (IS_LONG (p) ? LONGSIZE : INTSIZE);
789 return SPEC_STRUCT (p)->size;
796 return ((SPEC_BLEN (p) / 8) + (SPEC_BLEN (p) % 8 ? 1 : 0));
802 /* this is a declarator */
803 switch (DCL_TYPE (p))
807 return DCL_ELEM (p) * getSize (p->next);
809 // werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
810 // "can not tell the size of an array[]");
830 /*---------------------------------------------------------------------*/
831 /* getAllocSize - returns size of a type chain in bytes for allocation */
832 /*---------------------------------------------------------------------*/
834 getAllocSize (sym_link *p)
836 if (IS_STRUCT (p) && SPEC_STRUCT (p)->type == STRUCT)
838 /* if this is a struct specifier then */
839 /* calculate the size as it could end */
840 /* with an array of unspecified length */
841 symbol *sflds = SPEC_STRUCT (p)->fields;
843 while (sflds && sflds->next)
846 if (sflds && !IS_BITFIELD (sflds->type))
847 return sflds->offset + getAllocSize (sflds->type);
849 return SPEC_STRUCT (p)->size;
855 /*------------------------------------------------------------------*/
856 /* bitsForType - returns # of bits required to store this type */
857 /*------------------------------------------------------------------*/
859 bitsForType (sym_link * p)
861 /* if nothing return 0 */
866 { /* if this is the specifier then */
868 switch (SPEC_NOUN (p))
869 { /* depending on the specifier type */
871 return (IS_LONG (p) ? LONGSIZE * 8 : INTSIZE * 8);
873 return FLOATSIZE * 8;
879 return SPEC_STRUCT (p)->size * 8;
886 return SPEC_BLEN (p);
892 /* this is a specifier */
893 switch (DCL_TYPE (p))
896 return DCL_ELEM (p) * getSize (p->next) * 8;
900 return (PTRSIZE * 8);
905 return (FPTRSIZE * 8);
907 return (GPTRSIZE * 8);
914 /*------------------------------------------------------------------*/
915 /* copySymbolChain - copies a symbol chain */
916 /*------------------------------------------------------------------*/
918 copySymbolChain (symbol * src)
925 dest = copySymbol (src);
926 dest->next = copySymbolChain (src->next);
930 /*------------------------------------------------------------------*/
931 /* copySymbol - makes a copy of a symbol */
932 /*------------------------------------------------------------------*/
934 copySymbol (symbol * src)
941 dest = newSymbol (src->name, src->level);
942 memcpy (dest, src, sizeof (symbol));
943 dest->level = src->level;
944 dest->block = src->block;
945 dest->ival = copyIlist (src->ival);
946 dest->type = copyLinkChain (src->type);
947 dest->etype = getSpec (dest->type);
949 dest->key = src->key;
950 dest->allocreq = src->allocreq;
954 /*------------------------------------------------------------------*/
955 /* reverseSyms - reverses the links for a symbol chain */
956 /*------------------------------------------------------------------*/
958 reverseSyms (symbol * sym)
960 symbol *prev, *curr, *next;
975 sym->next = (void *) NULL;
979 /*------------------------------------------------------------------*/
980 /* reverseLink - reverses the links for a type chain */
981 /*------------------------------------------------------------------*/
983 reverseLink (sym_link * type)
985 sym_link *prev, *curr, *next;
1000 type->next = (void *) NULL;
1004 /*------------------------------------------------------------------*/
1005 /* addSymChain - adds a symbol chain to the symboltable */
1006 /*------------------------------------------------------------------*/
1008 addSymChain (symbol * symHead)
1010 symbol *sym = symHead;
1011 symbol *csym = NULL;
1014 for (; sym != NULL; sym = sym->next)
1016 changePointer(sym->type);
1017 checkTypeSanity(sym->etype, sym->name);
1019 if (!sym->level && !(IS_SPEC(sym->etype) && IS_TYPEDEF(sym->etype)))
1022 /* if already exists in the symbol table then check if
1023 one of them is an extern definition if yes then
1024 then check if the type match, if the types match then
1025 delete the current entry and add the new entry */
1026 if ((csym = findSymWithLevel (SymbolTab, sym)) &&
1027 csym->level == sym->level) {
1029 /* If the previous definition was for an array with incomplete */
1030 /* type, and the new definition has completed the type, update */
1031 /* the original type to match */
1032 if (IS_DECL(csym->type) && DCL_TYPE(csym->type)==ARRAY
1033 && IS_DECL(sym->type) && DCL_TYPE(sym->type)==ARRAY)
1035 if (!DCL_ELEM(csym->type) && DCL_ELEM(sym->type))
1036 DCL_ELEM(csym->type) = DCL_ELEM(sym->type);
1040 /* If only one of the definitions used the "at" keyword, copy */
1041 /* the address to the other. */
1042 if (IS_SPEC(csym->etype) && SPEC_ABSA(csym->etype)
1043 && IS_SPEC(sym->etype) && !SPEC_ABSA(sym->etype))
1045 SPEC_ABSA (sym->etype) = 1;
1046 SPEC_ADDR (sym->etype) = SPEC_ADDR (csym->etype);
1048 if (IS_SPEC(csym->etype) && !SPEC_ABSA(csym->etype)
1049 && IS_SPEC(sym->etype) && SPEC_ABSA(sym->etype))
1051 SPEC_ABSA (csym->etype) = 1;
1052 SPEC_ADDR (csym->etype) = SPEC_ADDR (sym->etype);
1057 if (csym->ival && sym->ival)
1059 if (compareTypeExact (csym->type, sym->type, sym->level) != 1)
1063 /* one definition extern ? */
1064 if (IS_EXTERN (csym->etype) || IS_EXTERN (sym->etype))
1065 werror (E_EXTERN_MISMATCH, sym->name);
1067 werror (E_DUPLICATE, sym->name);
1068 werrorfl (csym->fileDef, csym->lineDef, E_PREVIOUS_DEF);
1070 fprintf (stderr, "from type '");
1071 printTypeChain (csym->type, stderr);
1072 if (IS_SPEC (csym->etype) && SPEC_ABSA (csym->etype))
1073 fprintf(stderr, " at 0x%x", SPEC_ADDR (csym->etype));
1074 fprintf (stderr, "'\nto type '");
1075 printTypeChain (sym->type, stderr);
1076 if (IS_SPEC (sym->etype) && SPEC_ABSA (sym->etype))
1077 fprintf(stderr, " at 0x%x", SPEC_ADDR (sym->etype));
1078 fprintf (stderr, "'\n");
1083 if (csym->ival && !sym->ival)
1084 sym->ival = csym->ival;
1086 /* delete current entry */
1087 deleteSym (SymbolTab, csym, csym->name);
1088 deleteFromSeg(csym);
1092 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
1097 /*------------------------------------------------------------------*/
1098 /* funcInChain - DCL Type 'FUNCTION' found in type chain */
1099 /*------------------------------------------------------------------*/
1101 funcInChain (sym_link * lnk)
1112 /*------------------------------------------------------------------*/
1113 /* structElemType - returns the type info of a struct member */
1114 /*------------------------------------------------------------------*/
1116 structElemType (sym_link * stype, value * id)
1118 symbol *fields = (SPEC_STRUCT (stype) ? SPEC_STRUCT (stype)->fields : NULL);
1119 sym_link *type, *etype;
1120 sym_link *petype = getSpec (stype);
1124 /* look for the id */
1127 if (strcmp (fields->rname, id->name) == 0)
1129 type = copyLinkChain (fields->type);
1130 etype = getSpec (type);
1131 SPEC_SCLS (etype) = (SPEC_SCLS (petype) == S_REGISTER ?
1132 SPEC_SCLS (etype) : SPEC_SCLS (petype));
1134 SPEC_CONST (type) |= SPEC_CONST (stype);
1136 DCL_PTR_CONST (type) |= SPEC_CONST (stype);
1139 fields = fields->next;
1143 werror (E_NOT_MEMBER, id->name);
1145 // the show must go on
1146 return newIntLink();
1149 /*------------------------------------------------------------------*/
1150 /* getStructElement - returns element of a tructure definition */
1151 /*------------------------------------------------------------------*/
1153 getStructElement (structdef * sdef, symbol * sym)
1157 for (field = sdef->fields; field; field = field->next)
1158 if (strcmp (field->name, sym->name) == 0)
1161 werror (E_NOT_MEMBER, sym->name);
1163 return sdef->fields;
1166 /*------------------------------------------------------------------*/
1167 /* compStructSize - computes the size of a structure */
1168 /*------------------------------------------------------------------*/
1170 compStructSize (int su, structdef * sdef)
1172 int sum = 0, usum = 0;
1176 /* for the identifiers */
1177 loop = sdef->fields;
1180 /* create the internal name for this variable */
1181 SNPRINTF (loop->rname, sizeof(loop->rname), "_%s", loop->name);
1186 SPEC_VOLATILE (loop->etype) |= (su == UNION ? 1 : 0);
1188 /* if this is a bit field */
1191 /* change it to a unsigned bit */
1192 SPEC_NOUN (loop->etype) = V_BITFIELD;
1193 SPEC_USIGN (loop->etype) = 1;
1194 SPEC_BLEN (loop->etype) = loop->bitVar;
1196 if (loop->bitVar == BITVAR_PAD) {
1197 /* A zero length bitfield forces padding */
1198 SPEC_BSTR (loop->etype) = bitOffset;
1199 SPEC_BLEN (loop->etype) = 0;
1204 if (bitOffset == 8) {
1208 /* check if this fit into the remaining */
1209 /* bits of this byte else align it to the */
1210 /* next byte boundary */
1211 if (loop->bitVar <= (8 - bitOffset)) {
1212 /* fits into current byte */
1214 SPEC_BSTR (loop->etype) = bitOffset;
1215 bitOffset += loop->bitVar;
1217 else if (!bitOffset) {
1218 /* does not fit, but is already byte aligned */
1220 SPEC_BSTR (loop->etype) = bitOffset;
1221 bitOffset += loop->bitVar;
1224 /* does not fit; need to realign first */
1226 loop->offset = (su == UNION ? sum = 0 : sum);
1228 SPEC_BSTR (loop->etype) = bitOffset;
1229 bitOffset += loop->bitVar;
1231 while (bitOffset>8) {
1238 /* This is a non-bit field. Make sure we are */
1239 /* byte aligned first */
1242 loop->offset = (su == UNION ? sum = 0 : sum);
1246 checkDecl (loop, 1);
1247 sum += getSize (loop->type);
1252 /* if union then size = sizeof largest field */
1254 /* For UNION, round up after each field */
1255 sum += ((bitOffset+7)/8);
1256 usum = max (usum, sum);
1261 /* For STRUCT, round up after all fields processed */
1263 sum += ((bitOffset+7)/8);
1265 return (su == UNION ? usum : sum);
1268 /*-------------------------------------------------------------------*/
1269 /* promoteAnonStructs - promote anonymous struct/union's fields into */
1270 /* an enclosing struct/union */
1271 /*-------------------------------------------------------------------*/
1273 promoteAnonStructs (int su, structdef * sdef)
1282 tofield = &sdef->fields;
1283 field = sdef->fields;
1286 nextfield = field->next;
1287 if (!*field->name && IS_STRUCT (field->type))
1289 /* Found an anonymous struct/union. Replace it */
1290 /* with the fields it contains and adjust all */
1293 base = field->offset;
1294 subfield = copySymbolChain (SPEC_STRUCT (field->type)->fields);
1296 continue; /* just in case it's empty */
1298 *tofield = subfield;
1301 /* check for field name conflicts resulting from promotion */
1302 dupfield = sdef->fields;
1303 while (dupfield && dupfield != subfield)
1305 if (*subfield->name && !strcmp (dupfield->name, subfield->name))
1307 werrorfl (subfield->fileDef, subfield->lineDef,
1309 su==STRUCT ? "struct" : "union",
1311 werrorfl (dupfield->fileDef, dupfield->lineDef,
1314 dupfield = dupfield->next;
1317 subfield->offset += base;
1319 subfield = subfield->next;
1323 subfield->next = nextfield;
1324 tofield = &subfield->next;
1327 tofield = &field->next;
1333 /*------------------------------------------------------------------*/
1334 /* checkSClass - check the storage class specification */
1335 /*------------------------------------------------------------------*/
1337 checkSClass (symbol * sym, int isProto)
1341 if (getenv("DEBUG_SANITY")) {
1342 fprintf (stderr, "checkSClass: %s \n", sym->name);
1345 /* type is literal can happen for enums change
1347 if (SPEC_SCLS (sym->etype) == S_LITERAL && !SPEC_ENUM (sym->etype))
1348 SPEC_SCLS (sym->etype) = S_AUTO;
1350 /* if sfr or sbit then must also be volatile */
1351 if (SPEC_SCLS (sym->etype) == S_SBIT ||
1352 SPEC_SCLS (sym->etype) == S_SFR)
1354 SPEC_VOLATILE (sym->etype) = 1;
1357 /* if absolute address given then it mark it as
1358 volatile -- except in the PIC port */
1360 #if !OPT_DISABLE_PIC || !OPT_DISABLE_PIC16
1361 /* The PIC port uses a different peep hole optimizer based on "pCode" */
1362 if (!TARGET_IS_PIC && !TARGET_IS_PIC16)
1365 if (IS_ABSOLUTE (sym->etype))
1366 SPEC_VOLATILE (sym->etype) = 1;
1368 /* If code memory is read only, then pointers to code memory */
1369 /* implicitly point to constants -- make this explicit */
1371 while (t && t->next) {
1372 if (IS_CODEPTR(t) && port->mem.code_ro) {
1373 if (IS_SPEC(t->next)) {
1374 SPEC_CONST (t->next) = 1;
1376 DCL_PTR_CONST (t->next) = 1;
1382 /* global variables declared const put into code */
1383 /* if no other storage class specified */
1384 if (sym->level == 0 &&
1385 SPEC_SCLS(sym->etype) == S_FIXED &&
1386 !IS_FUNC(sym->type)) {
1387 /* find the first non-array link */
1391 if (IS_CONSTANT (t)) {
1392 SPEC_SCLS (sym->etype) = S_CODE;
1396 /* global variable in code space is a constant */
1397 if (sym->level == 0 &&
1398 SPEC_SCLS (sym->etype) == S_CODE &&
1399 port->mem.code_ro) {
1400 /* find the first non-array link */
1407 DCL_PTR_CONST (t) = 1;
1411 /* if bit variable then no storage class can be */
1412 /* specified since bit is already a storage */
1413 if (IS_BITVAR (sym->etype) &&
1414 (SPEC_SCLS (sym->etype) != S_FIXED &&
1415 SPEC_SCLS (sym->etype) != S_SBIT &&
1416 SPEC_SCLS (sym->etype) != S_BIT)
1419 werror (E_BITVAR_STORAGE, sym->name);
1420 SPEC_SCLS (sym->etype) = S_FIXED;
1423 /* extern variables cannot be initialized */
1424 if (IS_EXTERN (sym->etype) && sym->ival)
1426 werror (E_EXTERN_INIT, sym->name);
1430 /* if this is an automatic symbol */
1431 if (sym->level && (options.stackAuto || reentrant)) {
1432 if ((SPEC_SCLS (sym->etype) == S_AUTO ||
1433 SPEC_SCLS (sym->etype) == S_FIXED ||
1434 SPEC_SCLS (sym->etype) == S_REGISTER ||
1435 SPEC_SCLS (sym->etype) == S_STACK ||
1436 SPEC_SCLS (sym->etype) == S_XSTACK)) {
1437 SPEC_SCLS (sym->etype) = S_AUTO;
1439 /* storage class may only be specified for statics */
1440 if (!IS_STATIC(sym->etype)) {
1441 werror (E_AUTO_ASSUMED, sym->name);
1446 /* automatic symbols cannot be given */
1447 /* an absolute address ignore it */
1449 SPEC_ABSA (sym->etype) &&
1450 (options.stackAuto || reentrant))
1452 werror (E_AUTO_ABSA, sym->name);
1453 SPEC_ABSA (sym->etype) = 0;
1456 /* arrays & pointers cannot be defined for bits */
1457 /* SBITS or SFRs or BIT */
1458 if ((IS_ARRAY (sym->type) || IS_PTR (sym->type)) &&
1459 (SPEC_NOUN (sym->etype) == V_BIT ||
1460 SPEC_NOUN (sym->etype) == V_SBIT ||
1461 SPEC_NOUN (sym->etype) == V_BITFIELD ||
1462 SPEC_SCLS (sym->etype) == S_SFR))
1463 werror (E_BIT_ARRAY, sym->name);
1465 /* if this is a bit|sbit then set length & start */
1466 if (SPEC_NOUN (sym->etype) == V_BIT ||
1467 SPEC_NOUN (sym->etype) == V_SBIT)
1469 SPEC_BLEN (sym->etype) = 1;
1470 SPEC_BSTR (sym->etype) = 0;
1474 /* variables declared in CODE space must have */
1475 /* initializers if not an extern */
1476 if (SPEC_SCLS (sym->etype) == S_CODE &&
1477 sym->ival == NULL &&
1480 port->mem.code_ro &&
1481 !IS_EXTERN (sym->etype) &&
1482 !funcInChain (sym->type))
1483 werror (E_CODE_NO_INIT, sym->name);
1486 /* if parameter or local variable then change */
1487 /* the storage class to reflect where the var will go */
1488 if (sym->level && SPEC_SCLS (sym->etype) == S_FIXED
1489 && !IS_STATIC(sym->etype)
1492 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
1494 SPEC_SCLS (sym->etype) = (options.useXstack ?
1495 S_XSTACK : S_STACK);
1499 /* hack-o-matic! I see no reason why the useXstack option should ever
1500 * control this allocation, but the code was originally that way, and
1501 * changing it for non-390 ports breaks the compiler badly.
1503 bool useXdata = (TARGET_IS_DS390 || TARGET_IS_DS400) ?
1504 1 : options.useXstack;
1505 SPEC_SCLS (sym->etype) = (useXdata ?
1511 /*------------------------------------------------------------------*/
1512 /* changePointer - change pointer to functions */
1513 /*------------------------------------------------------------------*/
1515 changePointer (sym_link * p)
1518 /* go thru the chain of declarations */
1519 /* if we find a pointer to a function */
1520 /* unconditionally change it to a ptr */
1522 for (; p; p = p->next)
1524 if (!IS_SPEC (p) && DCL_TYPE (p) == UPOINTER)
1525 DCL_TYPE (p) = port->unqualified_pointer;
1526 if (IS_PTR (p) && IS_FUNC (p->next))
1527 DCL_TYPE (p) = CPOINTER;
1531 /*------------------------------------------------------------------*/
1532 /* checkDecl - does semantic validation of a declaration */
1533 /*------------------------------------------------------------------*/
1535 checkDecl (symbol * sym, int isProto)
1538 checkSClass (sym, isProto); /* check the storage class */
1539 changePointer (sym->type); /* change pointers if required */
1541 /* if this is an array without any dimension
1542 then update the dimension from the initial value */
1543 if (IS_ARRAY (sym->type) && !DCL_ELEM (sym->type))
1544 DCL_ELEM (sym->type) = getNelements (sym->type, sym->ival);
1549 /*------------------------------------------------------------------*/
1550 /* copyLinkChain - makes a copy of the link chain & rets ptr 2 head */
1551 /*------------------------------------------------------------------*/
1553 copyLinkChain (sym_link * p)
1555 sym_link *head, *curr, *loop;
1558 head = loop = (curr ? newLink (p->class) : (void *) NULL);
1561 memcpy (loop, curr, sizeof (sym_link)); /* copy it */
1562 loop->next = (curr->next ? newLink (curr->next->class) : (void *) NULL);
1570 /*------------------------------------------------------------------*/
1571 /* cleanUpBlock - cleansup the symbol table specified for all the */
1572 /* symbols in the given block */
1573 /*------------------------------------------------------------------*/
1575 cleanUpBlock (bucket ** table, int block)
1580 /* go thru the entire table */
1581 for (i = 0; i < 256; i++)
1583 for (chain = table[i]; chain; chain = chain->next)
1585 if (chain->block >= block)
1587 deleteSym (table, chain->sym, chain->name);
1593 /*------------------------------------------------------------------*/
1594 /* cleanUpLevel - cleansup the symbol table specified for all the */
1595 /* symbols in the given level */
1596 /*------------------------------------------------------------------*/
1598 cleanUpLevel (bucket ** table, int level)
1603 /* go thru the entire table */
1604 for (i = 0; i < 256; i++)
1606 for (chain = table[i]; chain; chain = chain->next)
1608 if (chain->level >= level)
1610 deleteSym (table, chain->sym, chain->name);
1616 /*------------------------------------------------------------------*/
1617 /* computeTypeOr - computes the resultant type from two types */
1618 /*------------------------------------------------------------------*/
1620 computeTypeOr (sym_link * etype1, sym_link * etype2, sym_link * reType)
1623 assert ( (IS_CHAR (etype1) || IS_BIT (etype1))
1624 && (IS_CHAR (etype2) || IS_BIT (etype2)));
1626 if (SPEC_USIGN (etype1) == SPEC_USIGN (etype2))
1628 SPEC_USIGN (reType) = SPEC_USIGN (etype1);
1632 if (SPEC_USIGN (etype1))
1634 if ( IS_LITERAL (etype2)
1635 && floatFromVal (valFromType (etype2)) >= 0)
1636 SPEC_USIGN (reType) = 1;
1639 /* promote to int */
1640 SPEC_USIGN (reType) = 0;
1641 SPEC_NOUN (reType) = V_INT;
1644 else /* etype1 signed */
1646 if ( IS_LITERAL (etype2)
1647 && floatFromVal (valFromType (etype2)) <= 127)
1648 SPEC_USIGN (reType) = 0;
1651 /* promote to int */
1652 SPEC_USIGN (reType) = 0;
1653 SPEC_NOUN (reType) = V_INT;
1657 if (SPEC_USIGN (etype2))
1659 if ( IS_LITERAL (etype1)
1660 && floatFromVal (valFromType (etype1)) >= 0)
1661 SPEC_USIGN (reType) = 1;
1664 /* promote to int */
1665 SPEC_USIGN (reType) = 0;
1666 SPEC_NOUN (reType) = V_INT;
1669 else /* etype2 signed */
1671 if ( IS_LITERAL (etype1)
1672 && floatFromVal (valFromType (etype1)) <= 127)
1673 SPEC_USIGN (reType) = 0;
1676 /* promote to int */
1677 SPEC_USIGN (reType) = 0;
1678 SPEC_NOUN (reType) = V_INT;
1684 /*------------------------------------------------------------------*/
1685 /* computeType - computes the resultant type from two types */
1686 /*------------------------------------------------------------------*/
1688 computeType (sym_link * type1, sym_link * type2,
1689 RESULT_TYPE resultType, int op)
1693 sym_link *etype1 = getSpec (type1);
1696 etype2 = type2 ? getSpec (type2) : type1;
1698 /* if one of them is a float then result is a float */
1699 /* here we assume that the types passed are okay */
1700 /* and can be cast to one another */
1701 /* which ever is greater in size */
1702 if (IS_FLOAT (etype1) || IS_FLOAT (etype2))
1703 rType = newFloatLink ();
1705 /* if both are bitvars choose the larger one */
1706 if (IS_BITVAR (etype1) && IS_BITVAR (etype2))
1708 rType = SPEC_BLEN (etype1) >= SPEC_BLEN (etype2) ?
1709 copyLinkChain (type1) : copyLinkChain (type1);
1711 /* if only one of them is a bit variable
1712 then the other one prevails */
1713 else if (IS_BITVAR (etype1) && !IS_BITVAR (etype2))
1715 rType = copyLinkChain (type2);
1716 /* bitfield can have up to 16 bits */
1717 if (getSize (etype1) > 1)
1718 SPEC_NOUN (getSpec (rType)) = V_INT;
1720 else if (IS_BITVAR (etype2) && !IS_BITVAR (etype1))
1722 rType = copyLinkChain (type1);
1723 /* bitfield can have up to 16 bits */
1724 if (getSize (etype2) > 1)
1725 SPEC_NOUN (getSpec (rType)) = V_INT;
1728 /* if one of them is a pointer or array then that
1730 if (IS_PTR (type1) || IS_ARRAY (type1))
1731 rType = copyLinkChain (type1);
1732 else if (IS_PTR (type2) || IS_ARRAY (type2))
1733 rType = copyLinkChain (type2);
1734 else if (getSize (type1) > getSize (type2))
1735 rType = copyLinkChain (type1);
1737 rType = copyLinkChain (type2);
1739 reType = getSpec (rType);
1741 /* avoid conflicting types */
1742 reType->select.s._signed = 0;
1744 /* if result is a literal then make not so */
1745 if (IS_LITERAL (reType))
1746 SPEC_SCLS (reType) = S_REGISTER;
1750 case RESULT_TYPE_CHAR:
1751 if (IS_BITVAR (reType))
1753 SPEC_NOUN (reType) = V_CHAR;
1754 SPEC_SCLS (reType) = 0;
1755 SPEC_USIGN (reType) = 0;
1759 case RESULT_TYPE_INT:
1760 case RESULT_TYPE_NONE:
1761 case RESULT_TYPE_OTHER:
1762 if (IS_BIT (reType))
1764 SPEC_NOUN (reType) = V_CHAR;
1765 SPEC_SCLS (reType) = 0;
1766 SPEC_USIGN (reType) = 0;
1769 else if (IS_BITFIELD (reType))
1771 /* could be smarter, but it depends on the op */
1772 /* this is for the worst case: a multiplication of 4 * 4 bit */
1773 SPEC_NOUN (reType) = SPEC_BLEN (reType) <= 4 ? V_CHAR : V_INT;
1774 SPEC_SCLS (reType) = 0;
1775 SPEC_USIGN (reType) = 0;
1778 else if (IS_CHAR (reType))
1780 if (op == '|' || op == '^')
1781 return computeTypeOr (etype1, etype2, reType);
1783 && SPEC_USIGN (etype1) != SPEC_USIGN (etype2))
1785 SPEC_USIGN (reType) = 1;
1790 SPEC_NOUN (reType) = V_INT;
1791 SPEC_USIGN (reType) = 0;
1794 /* TODO: should be in SDCCast.c */
1796 && ( !SPEC_USIGN (etype1)
1797 || !SPEC_USIGN (etype2)))
1799 SPEC_NOUN (reType) = V_INT;
1800 SPEC_USIGN (reType) = 0;
1809 /* SDCC's sign promotion:
1810 - if one or both operands are unsigned, the resultant type will be unsigned
1811 (except char, see below)
1812 - if an operand is promoted to a larger type (char -> int, int -> long),
1813 the larger type will be signed
1815 SDCC tries hard to avoid promotion to int and does 8 bit calculation as
1816 much as possible. We're leaving ISO IEC 9899 here and have to extrapolate
1817 the standard. The standard demands, that the result has to be the same
1818 "as if" the promotion would have been performed:
1820 - if the result of an operation with two char's is promoted to a
1821 larger type, the result will be signed.
1823 More sophisticated are these:
1824 - if the result of an operation with two char's is a char again,
1825 the result will only then be unsigned, if both operands are
1826 unsigned. In all other cases the result will be signed.
1828 This seems to be contradictionary to the first two rules, but it makes
1829 real sense (all types are char's):
1831 A signed char can be negative; this must be preserved in the result
1834 Only if both operands are unsigned it's safe to make the result
1835 unsigned; this helps to avoid overflow:
1838 - ToDo: document '|', '^' and '&'
1840 Homework: - why is (200 * 200 < 0) true?
1841 - why is { char l = 200, r = 200; (r * l > 0) } true?
1844 if (!IS_FLOAT (reType)
1845 && ( (SPEC_USIGN (etype1)
1846 /* if this operand is promoted to a larger type,
1847 then it will be promoted to a signed type */
1848 && !(getSize (etype1) < getSize (reType))
1849 /* char require special handling */
1850 && !IS_CHAR (etype1))
1851 || /* same for 2nd operand */
1852 (SPEC_USIGN (etype2)
1853 && !(getSize (etype2) < getSize (reType))
1854 && !IS_CHAR (etype2))
1855 || /* if both are 'unsigned char' and not promoted
1856 let the result be unsigned too */
1857 ( SPEC_USIGN (etype1)
1858 && SPEC_USIGN (etype2)
1861 && IS_CHAR (reType))))
1862 SPEC_USIGN (reType) = 1;
1864 SPEC_USIGN (reType) = 0;
1869 /*--------------------------------------------------------------------*/
1870 /* compareType - will do type check return 1 if match, -1 if castable */
1871 /*--------------------------------------------------------------------*/
1873 compareType (sym_link * dest, sym_link * src)
1884 /* if dest is a declarator then */
1889 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
1891 //checkFunction(src,dest);
1893 return compareType (dest->next, src->next);
1895 if (IS_PTR (dest) && IS_GENPTR (src) && IS_VOID(src->next)) {
1899 (IS_GENPTR (dest) ||
1900 ((DCL_TYPE(src) == POINTER) && (DCL_TYPE(dest) == IPOINTER))
1903 if (IS_PTR (dest) && IS_ARRAY (src)) {
1904 value *val=aggregateToPointer (valFromType(src));
1905 int res=compareType (dest, val->type);
1906 Safe_free(val->type);
1910 if (IS_PTR (dest) && IS_FUNC (dest->next) && IS_FUNC (src))
1911 return compareType (dest->next, src);
1914 else if (IS_PTR (dest) && IS_INTEGRAL (src))
1920 /* if one is a specifier and the other is not */
1921 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
1922 (IS_SPEC (dest) && !IS_SPEC (src)))
1925 /* if one of them is a void then ok */
1926 if (SPEC_NOUN (dest) == V_VOID &&
1927 SPEC_NOUN (src) != V_VOID)
1930 if (SPEC_NOUN (dest) != V_VOID &&
1931 SPEC_NOUN (src) == V_VOID)
1934 /* if they are both bitfields then if the lengths
1935 and starts don't match */
1936 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
1937 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
1938 SPEC_BSTR (dest) != SPEC_BSTR (src)))
1941 /* it is a specifier */
1942 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
1944 if (SPEC_USIGN (dest) == SPEC_USIGN (src) &&
1945 IS_INTEGRAL (dest) && IS_INTEGRAL (src) &&
1947 bitsForType (dest) == bitsForType (src))
1948 instead of the next two lines, but the regression tests fail with
1949 them; I guess it's a problem with replaceCheaperOp */
1950 getSize (dest) == getSize (src) &&
1951 !(!IS_BIT (dest) && IS_BIT (src)))
1953 else if (IS_ARITHMETIC (dest) && IS_ARITHMETIC (src))
1958 else if (IS_STRUCT (dest))
1960 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
1965 if (SPEC_LONG (dest) != SPEC_LONG (src))
1968 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
1974 /*--------------------------------------------------------------------*/
1975 /* compareTypeExact - will do type check return 1 if match exactly */
1976 /*--------------------------------------------------------------------*/
1978 compareTypeExact (sym_link * dest, sym_link * src, int level)
1980 STORAGE_CLASS srcScls, destScls;
1991 /* if dest is a declarator then */
1996 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
1997 if ((DCL_TYPE (src) == ARRAY) && (DCL_ELEM (src) != DCL_ELEM (dest)))
1999 if (DCL_PTR_CONST (src) != DCL_PTR_CONST (dest))
2001 if (DCL_PTR_VOLATILE (src) != DCL_PTR_VOLATILE (dest))
2005 value *exargs, *acargs, *checkValue;
2007 /* verify function return type */
2008 if (!compareTypeExact (dest->next, src->next, -1))
2010 if (FUNC_ISISR (dest) != FUNC_ISISR (src))
2012 if (FUNC_REGBANK (dest) != FUNC_REGBANK (src))
2014 if (IFFUNC_ISNAKED (dest) != IFFUNC_ISNAKED (src))
2017 if (IFFUNC_ISREENT (dest) != IFFUNC_ISREENT (src) && argCnt>1)
2021 /* compare expected args with actual args */
2022 exargs = FUNC_ARGS(dest);
2023 acargs = FUNC_ARGS(src);
2025 /* for all the expected args do */
2026 for (; exargs && acargs; exargs = exargs->next, acargs = acargs->next)
2028 //checkTypeSanity(acargs->etype, acargs->name);
2030 if (IS_AGGREGATE (acargs->type))
2032 checkValue = copyValue (acargs);
2033 aggregateToPointer (checkValue);
2036 checkValue = acargs;
2039 if (!compareTypeExact (exargs->type, checkValue->type, -1))
2044 /* if one them ended we have a problem */
2045 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2046 (!exargs && acargs && !IS_VOID (acargs->type)))
2050 return compareTypeExact (dest->next, src->next, level);
2057 /* if one is a specifier and the other is not */
2058 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
2059 (IS_SPEC (dest) && !IS_SPEC (src)))
2062 /* if one of them is a void then ok */
2063 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
2066 /* if they are both bitfields then if the lengths
2067 and starts don't match */
2068 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
2069 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
2070 SPEC_BSTR (dest) != SPEC_BSTR (src)))
2073 if (IS_INTEGRAL (dest))
2075 /* signedness must match */
2076 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
2078 /* size must match */
2079 if (SPEC_LONG (dest) != SPEC_LONG (src))
2081 if (SPEC_SHORT (dest) != SPEC_SHORT (src))
2085 if (IS_STRUCT (dest))
2087 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
2091 if (SPEC_CONST (dest) != SPEC_CONST (src))
2093 if (SPEC_VOLATILE (dest) != SPEC_VOLATILE (src))
2095 if (SPEC_STAT (dest) != SPEC_STAT (src))
2097 if (SPEC_ABSA (dest) != SPEC_ABSA (src))
2099 if (SPEC_ABSA (dest) && SPEC_ADDR (dest) != SPEC_ADDR (src))
2102 destScls = SPEC_SCLS (dest);
2103 srcScls = SPEC_SCLS (src);
2105 /* Compensate for const to const code change in checkSClass() */
2106 if (!level & port->mem.code_ro && SPEC_CONST (dest))
2108 if (srcScls == S_CODE && destScls == S_FIXED)
2110 if (destScls == S_CODE && srcScls == S_FIXED)
2114 /* compensate for allocGlobal() */
2115 if ((srcScls == S_FIXED || srcScls == S_AUTO)
2116 && port->mem.default_globl_map == xdata
2120 if (level>0 && !SPEC_STAT (dest))
2122 /* Compensate for hack-o-matic in checkSClass() */
2123 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
2125 if (destScls == S_FIXED)
2126 destScls = (options.useXstack ? S_XSTACK : S_STACK);
2127 if (srcScls == S_FIXED)
2128 srcScls = (options.useXstack ? S_XSTACK : S_STACK);
2130 else if (TARGET_IS_DS390 || TARGET_IS_DS400 || options.useXstack)
2132 if (destScls == S_FIXED)
2134 if (srcScls == S_FIXED)
2139 if (srcScls != destScls)
2142 printf ("level = %d\n", level);
2143 printf ("SPEC_SCLS (src) = %d, SPEC_SCLS (dest) = %d\n",
2144 SPEC_SCLS (src), SPEC_SCLS (dest));
2145 printf ("srcScls = %d, destScls = %d\n",srcScls, destScls);
2153 /*------------------------------------------------------------------*/
2154 /* inCalleeSaveList - return 1 if found in callee save list */
2155 /*------------------------------------------------------------------*/
2157 calleeCmp(void *p1, void *p2)
2159 return (strcmp((char *)p1, (char *)(p2)) == 0);
2163 inCalleeSaveList(char *s)
2165 if (options.all_callee_saves)
2167 return isinSetWith(options.calleeSavesSet, s, calleeCmp);
2170 /*-----------------------------------------------------------------*/
2171 /* aggregateToPointer: change an agggregate type function */
2172 /* argument to a pointer to that type. */
2173 /*-----------------------------------------------------------------*/
2175 aggregateToPointer (value * val)
2177 if (IS_AGGREGATE (val->type))
2179 /* if this is a structure */
2180 /* then we need to add a new link */
2181 if (IS_STRUCT (val->type))
2183 /* first lets add DECLARATOR type */
2184 sym_link *p = val->type;
2186 werror (W_STRUCT_AS_ARG, val->name);
2187 val->type = newLink (DECLARATOR);
2188 val->type->next = p;
2191 /* change to a pointer depending on the */
2192 /* storage class specified */
2193 switch (SPEC_SCLS (val->etype))
2196 DCL_TYPE (val->type) = IPOINTER;
2199 DCL_TYPE (val->type) = PPOINTER;
2202 if (SPEC_OCLS(val->etype)) {
2203 DCL_TYPE(val->type)=PTR_TYPE(SPEC_OCLS(val->etype));
2205 // this happens for (external) function parameters
2206 DCL_TYPE (val->type) = port->unqualified_pointer;
2212 DCL_TYPE (val->type) = POINTER;
2215 DCL_TYPE (val->type) = CPOINTER;
2218 DCL_TYPE (val->type) = FPOINTER;
2221 DCL_TYPE (val->type) = EEPPOINTER;
2224 DCL_TYPE (val->type) = port->unqualified_pointer;
2227 /* is there is a symbol associated then */
2228 /* change the type of the symbol as well */
2231 val->sym->type = copyLinkChain (val->type);
2232 val->sym->etype = getSpec (val->sym->type);
2237 /*------------------------------------------------------------------*/
2238 /* checkFunction - does all kinds of check on a function */
2239 /*------------------------------------------------------------------*/
2241 checkFunction (symbol * sym, symbol *csym)
2243 value *exargs, *acargs;
2247 if (getenv("DEBUG_SANITY")) {
2248 fprintf (stderr, "checkFunction: %s ", sym->name);
2251 if (!IS_DECL(sym->type) || DCL_TYPE(sym->type)!=FUNCTION)
2253 werror(E_SYNTAX_ERROR, sym->name);
2257 /* make sure the type is complete and sane */
2258 checkTypeSanity(((symbol *)sym)->etype, ((symbol *)sym)->name);
2260 /* if not type then some kind of error */
2264 /* if the function has no type then make it return int */
2265 if (!sym->type->next)
2266 sym->type->next = sym->etype = newIntLink ();
2268 /* function cannot return aggregate */
2269 if (IS_AGGREGATE (sym->type->next))
2271 werror (E_FUNC_AGGR, sym->name);
2275 /* function cannot return bit */
2276 if (IS_BITVAR (sym->type->next))
2278 werror (E_FUNC_BIT, sym->name);
2282 /* check if this function is defined as calleeSaves
2283 then mark it as such */
2284 FUNC_CALLEESAVES(sym->type) = inCalleeSaveList (sym->name);
2286 /* if interrupt service routine */
2287 /* then it cannot have arguments */
2288 if (IFFUNC_ARGS(sym->type) && FUNC_ISISR (sym->type))
2290 if (!IS_VOID(FUNC_ARGS(sym->type)->type)) {
2291 werror (E_INT_ARGS, sym->name);
2292 FUNC_ARGS(sym->type)=NULL;
2296 for (argCnt=1, acargs = FUNC_ARGS(sym->type);
2298 acargs=acargs->next, argCnt++) {
2300 // this can happen for reentrant functions
2301 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2302 // the show must go on: synthesize a name and symbol
2303 SNPRINTF (acargs->name, sizeof(acargs->name), "_%s_PARM_%d", sym->name, argCnt);
2304 acargs->sym = newSymbol (acargs->name, 1);
2305 SPEC_OCLS (acargs->etype) = istack;
2306 acargs->sym->type = copyLinkChain (acargs->type);
2307 acargs->sym->etype = getSpec (acargs->sym->type);
2308 acargs->sym->_isparm = 1;
2309 strncpyz (acargs->sym->rname, acargs->name, sizeof(acargs->sym->rname));
2310 } else if (strcmp(acargs->sym->name, acargs->sym->rname)==0) {
2312 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2317 if (!csym && !(csym = findSym (SymbolTab, sym, sym->name)))
2318 return 1; /* not defined nothing more to check */
2320 /* check if body already present */
2321 if (csym && IFFUNC_HASBODY(csym->type))
2323 werror (E_FUNC_BODY, sym->name);
2327 /* check the return value type */
2328 if (compareType (csym->type, sym->type) <= 0)
2330 werror (E_PREV_DEF_CONFLICT, csym->name, "type");
2331 printFromToType(csym->type, sym->type);
2335 if (FUNC_ISISR (csym->type) != FUNC_ISISR (sym->type))
2337 werror (E_PREV_DEF_CONFLICT, csym->name, "interrupt");
2340 /* I don't think this is necessary for interrupts. An isr is a */
2341 /* root in the calling tree. */
2342 if ((FUNC_REGBANK (csym->type) != FUNC_REGBANK (sym->type)) &&
2343 (!FUNC_ISISR (sym->type)))
2345 werror (E_PREV_DEF_CONFLICT, csym->name, "using");
2348 if (IFFUNC_ISNAKED (csym->type) != IFFUNC_ISNAKED (sym->type))
2350 werror (E_PREV_DEF_CONFLICT, csym->name, "_naked");
2353 /* Really, reentrant should match regardless of argCnt, but */
2354 /* this breaks some existing code (the fp lib functions). If */
2355 /* the first argument is always passed the same way, this */
2356 /* lax checking is ok (but may not be true for in future ports) */
2357 if (IFFUNC_ISREENT (csym->type) != IFFUNC_ISREENT (sym->type)
2360 //printf("argCnt = %d\n",argCnt);
2361 werror (E_PREV_DEF_CONFLICT, csym->name, "reentrant");
2364 /* compare expected args with actual args */
2365 exargs = FUNC_ARGS(csym->type);
2366 acargs = FUNC_ARGS(sym->type);
2368 /* for all the expected args do */
2371 exargs = exargs->next, acargs = acargs->next, argCnt++)
2373 if (getenv("DEBUG_SANITY")) {
2374 fprintf (stderr, "checkFunction: %s ", exargs->name);
2376 /* make sure the type is complete and sane */
2377 checkTypeSanity(exargs->etype, exargs->name);
2379 /* If the actual argument is an array, any prototype
2380 * will have modified it to a pointer. Duplicate that
2383 if (IS_AGGREGATE (acargs->type))
2385 checkValue = copyValue (acargs);
2386 aggregateToPointer (checkValue);
2390 checkValue = acargs;
2393 if (compareType (exargs->type, checkValue->type) <= 0)
2395 werror (E_ARG_TYPE, argCnt);
2396 printFromToType(exargs->type, checkValue->type);
2401 /* if one them ended we have a problem */
2402 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2403 (!exargs && acargs && !IS_VOID (acargs->type)))
2404 werror (E_ARG_COUNT);
2406 /* replace with this defition */
2407 sym->cdef = csym->cdef;
2408 deleteSym (SymbolTab, csym, csym->name);
2409 deleteFromSeg(csym);
2410 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
2411 if (IS_EXTERN (csym->etype) && !
2412 IS_EXTERN (sym->etype))
2414 addSet (&publics, sym);
2419 /*------------------------------------------------------------------*/
2420 /* cdbStructBlock - calls struct printing for a blcks */
2421 /*------------------------------------------------------------------*/
2422 void cdbStructBlock (int block)
2425 bucket **table = StructTab;
2428 /* go thru the entire table */
2429 for (i = 0; i < 256; i++)
2431 for (chain = table[i]; chain; chain = chain->next)
2433 if (chain->block >= block)
2436 debugFile->writeType((structdef *)chain->sym, chain->block, 0, NULL);
2442 /*-----------------------------------------------------------------*/
2443 /* processFuncArgs - does some processing with function args */
2444 /*-----------------------------------------------------------------*/
2446 processFuncArgs (symbol * func)
2450 sym_link *funcType=func->type;
2452 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
2453 fprintf (stderr, "SDCCsymt.c:processFuncArgs(%s)\n", func->name);
2455 /* find the function declaration within the type */
2456 while (funcType && !IS_FUNC(funcType))
2457 funcType=funcType->next;
2459 /* if this function has variable argument list */
2460 /* then make the function a reentrant one */
2461 if (IFFUNC_HASVARARGS(funcType) || (options.stackAuto && !func->cdef))
2462 FUNC_ISREENT(funcType)=1;
2464 /* check if this function is defined as calleeSaves
2465 then mark it as such */
2466 FUNC_CALLEESAVES(funcType) = inCalleeSaveList (func->name);
2468 /* loop thru all the arguments */
2469 val = FUNC_ARGS(funcType);
2471 /* if it is void then remove parameters */
2472 if (val && IS_VOID (val->type))
2474 FUNC_ARGS(funcType) = NULL;
2478 /* reset regparm for the port */
2479 (*port->reset_regparms) ();
2481 /* if any of the arguments is an aggregate */
2482 /* change it to pointer to the same type */
2486 char buffer[SDCC_NAME_MAX+1];
2488 SNPRINTF (buffer, sizeof(buffer), "%s parameter %d", func->name, pNum);
2489 checkTypeSanity (val->etype, buffer);
2491 /* mark it as a register parameter if
2492 the function does not have VA_ARG
2493 and as port dictates */
2494 if (!IFFUNC_HASVARARGS(funcType) &&
2495 (argreg = (*port->reg_parm) (val->type)))
2497 SPEC_REGPARM (val->etype) = 1;
2498 SPEC_ARGREG(val->etype) = argreg;
2499 } else if (IFFUNC_ISREENT(funcType)) {
2500 FUNC_HASSTACKPARM(funcType) = 1;
2503 if (IS_AGGREGATE (val->type))
2505 aggregateToPointer (val);
2512 /* if this is an internal generated function call */
2514 /* ignore --stack-auto for this one, we don't know how it is compiled */
2515 /* simply trust on --int-long-reent or --float-reent */
2516 if (IFFUNC_ISREENT(funcType)) {
2520 /* if this function is reentrant or */
2521 /* automatics r 2b stacked then nothing */
2522 if (IFFUNC_ISREENT (funcType) || options.stackAuto)
2526 val = FUNC_ARGS(funcType);
2531 /* if a symbolname is not given */
2532 /* synthesize a variable name */
2535 SNPRINTF (val->name, sizeof(val->name),
2536 "_%s_PARM_%d", func->name, pNum++);
2537 val->sym = newSymbol (val->name, 1);
2538 if (SPEC_SCLS(val->etype) == S_BIT)
2539 SPEC_OCLS (val->etype) = bit;
2541 SPEC_OCLS (val->etype) = port->mem.default_local_map;
2542 val->sym->type = copyLinkChain (val->type);
2543 val->sym->etype = getSpec (val->sym->type);
2544 val->sym->_isparm = 1;
2545 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2547 /* ?? static functions shouldn't imply static parameters - EEP */
2548 if (IS_SPEC(func->etype)) {
2549 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2550 SPEC_STAT (func->etype);
2553 addSymChain (val->sym);
2556 else /* symbol name given create synth name */
2559 SNPRINTF (val->name, sizeof(val->name), "_%s_PARM_%d", func->name, pNum++);
2560 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2561 val->sym->_isparm = 1;
2562 if (SPEC_SCLS(val->etype) == S_BIT)
2563 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) = bit;
2565 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) =
2566 (options.model != MODEL_SMALL ? xdata : data);
2569 /* ?? static functions shouldn't imply static parameters - EEP */
2570 if (IS_SPEC(func->etype)) {
2571 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2572 SPEC_STAT (func->etype);
2576 if (!isinSet(operKeyReset, val->sym)) {
2577 addSet (&operKeyReset, val->sym);
2578 applyToSet (operKeyReset, resetParmKey);
2584 /*-----------------------------------------------------------------*/
2585 /* isSymbolEqual - compares two symbols return 1 if they match */
2586 /*-----------------------------------------------------------------*/
2588 isSymbolEqual (symbol * dest, symbol * src)
2590 /* if pointers match then equal */
2594 /* if one of them is null then don't match */
2598 /* if both of them have rname match on rname */
2599 if (dest->rname[0] && src->rname[0])
2600 return (!strcmp (dest->rname, src->rname));
2602 /* otherwise match on name */
2603 return (!strcmp (dest->name, src->name));
2606 void PT(sym_link *type)
2608 printTypeChain(type,0);
2610 /*-----------------------------------------------------------------*/
2611 /* printTypeChain - prints the type chain in human readable form */
2612 /*-----------------------------------------------------------------*/
2614 printTypeChain (sym_link * start, FILE * of)
2618 sym_link * type, * search;
2628 fprintf (of, "void");
2632 /* Print the chain as it is written in the source: */
2633 /* start with the last entry. */
2634 /* However, the storage class at the end of the */
2635 /* chain reall applies to the first in the chain! */
2637 for (type = start; type && type->next; type = type->next)
2640 scls=SPEC_SCLS(type);
2648 case S_DATA: fprintf (of, "data-"); break;
2649 case S_XDATA: fprintf (of, "xdata-"); break;
2650 case S_SFR: fprintf (of, "sfr-"); break;
2651 case S_SBIT: fprintf (of, "sbit-"); break;
2652 case S_CODE: fprintf (of, "code-"); break;
2653 case S_IDATA: fprintf (of, "idata-"); break;
2654 case S_PDATA: fprintf (of, "pdata-"); break;
2655 case S_LITERAL: fprintf (of, "literal-"); break;
2656 case S_STACK: fprintf (of, "stack-"); break;
2657 case S_XSTACK: fprintf (of, "xstack-"); break;
2658 case S_BIT: fprintf (of, "bit-"); break;
2659 case S_EEPROM: fprintf (of, "eeprom-"); break;
2666 if (!IS_FUNC(type)) {
2667 if (DCL_PTR_VOLATILE (type)) {
2668 fprintf (of, "volatile-");
2670 if (DCL_PTR_CONST (type)) {
2671 fprintf (of, "const-");
2674 switch (DCL_TYPE (type))
2677 fprintf (of, "function %s %s",
2678 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2679 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2681 for (args = FUNC_ARGS(type);
2684 printTypeChain(args->type, of);
2691 fprintf (of, "generic* ");
2694 fprintf (of, "code* ");
2697 fprintf (of, "xdata* ");
2700 fprintf (of, "eeprom* ");
2703 fprintf (of, "near* ");
2706 fprintf (of, "idata* ");
2709 fprintf (of, "pdata* ");
2712 fprintf (of, "unknown* ");
2715 if (DCL_ELEM(type)) {
2716 fprintf (of, "[%d] ", DCL_ELEM(type));
2718 fprintf (of, "[] ");
2725 if (SPEC_VOLATILE (type))
2726 fprintf (of, "volatile-");
2727 if (SPEC_CONST (type))
2728 fprintf (of, "const-");
2729 if (SPEC_USIGN (type))
2730 fprintf (of, "unsigned-");
2731 switch (SPEC_NOUN (type))
2735 fprintf (of, "long-");
2736 fprintf (of, "int");
2740 fprintf (of, "char");
2744 fprintf (of, "void");
2748 fprintf (of, "float");
2752 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2756 fprintf (of, "sbit");
2760 fprintf (of, "bit");
2764 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2768 fprintf (of, "double");
2772 fprintf (of, "unknown type");
2776 /* search entry in list before "type" */
2777 for (search = start; search && search->next != type;)
2778 search = search->next;
2787 /*--------------------------------------------------------------------*/
2788 /* printTypeChainRaw - prints the type chain in human readable form */
2789 /* in the raw data structure ordering */
2790 /*--------------------------------------------------------------------*/
2792 printTypeChainRaw (sym_link * start, FILE * of)
2805 fprintf (of, "void");
2815 if (!IS_FUNC(type)) {
2816 if (DCL_PTR_VOLATILE (type)) {
2817 fprintf (of, "volatile-");
2819 if (DCL_PTR_CONST (type)) {
2820 fprintf (of, "const-");
2823 switch (DCL_TYPE (type))
2826 fprintf (of, "function %s %s",
2827 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2828 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2830 for (args = FUNC_ARGS(type);
2833 printTypeChain(args->type, of);
2840 fprintf (of, "generic* ");
2843 fprintf (of, "code* ");
2846 fprintf (of, "xdata* ");
2849 fprintf (of, "eeprom* ");
2852 fprintf (of, "near* ");
2855 fprintf (of, "idata* ");
2858 fprintf (of, "pdata* ");
2861 fprintf (of, "unknown* ");
2864 if (DCL_ELEM(type)) {
2865 fprintf (of, "[%d] ", DCL_ELEM(type));
2867 fprintf (of, "[] ");
2871 if (DCL_TSPEC(type))
2874 printTypeChainRaw(DCL_TSPEC(type), of);
2878 else if (IS_SPEC (type))
2880 switch (SPEC_SCLS (type))
2882 case S_DATA: fprintf (of, "data-"); break;
2883 case S_XDATA: fprintf (of, "xdata-"); break;
2884 case S_SFR: fprintf (of, "sfr-"); break;
2885 case S_SBIT: fprintf (of, "sbit-"); break;
2886 case S_CODE: fprintf (of, "code-"); break;
2887 case S_IDATA: fprintf (of, "idata-"); break;
2888 case S_PDATA: fprintf (of, "pdata-"); break;
2889 case S_LITERAL: fprintf (of, "literal-"); break;
2890 case S_STACK: fprintf (of, "stack-"); break;
2891 case S_XSTACK: fprintf (of, "xstack-"); break;
2892 case S_BIT: fprintf (of, "bit-"); break;
2893 case S_EEPROM: fprintf (of, "eeprom-"); break;
2896 if (SPEC_VOLATILE (type))
2897 fprintf (of, "volatile-");
2898 if (SPEC_CONST (type))
2899 fprintf (of, "const-");
2900 if (SPEC_USIGN (type))
2901 fprintf (of, "unsigned-");
2902 switch (SPEC_NOUN (type))
2906 fprintf (of, "long-");
2907 fprintf (of, "int");
2911 fprintf (of, "char");
2915 fprintf (of, "void");
2919 fprintf (of, "float");
2923 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2927 fprintf (of, "sbit");
2931 fprintf (of, "bit");
2935 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2939 fprintf (of, "double");
2943 fprintf (of, "unknown type");
2948 fprintf (of, "NOT_SPEC_OR_DECL");
2958 /*-----------------------------------------------------------------*/
2959 /* powof2 - returns power of two for the number if number is pow 2 */
2960 /*-----------------------------------------------------------------*/
2962 powof2 (TYPE_UDWORD num)
2975 if (n1s > 1 || nshifts == 0)
2991 /* Dims: mul/div/mod, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
2992 symbol *__muldiv[3][3][2];
2993 /* Dims: BYTE/WORD/DWORD SIGNED/UNSIGNED */
2994 sym_link *__multypes[3][2];
2995 /* Dims: to/from float, BYTE/WORD/DWORD, SIGNED/USIGNED */
2996 symbol *__conv[2][3][2];
2997 /* Dims: shift left/shift right, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
2998 symbol *__rlrr[2][3][2];
3000 sym_link *floatType;
3003 _mangleFunctionName(char *in)
3005 if (port->getMangledFunctionName)
3007 return port->getMangledFunctionName(in);
3015 /*-----------------------------------------------------------------*/
3016 /* typeFromStr - create a typechain from an encoded string */
3017 /* basic types - 'c' - char */
3023 /* '*' - pointer - default (GPOINTER) */
3024 /* modifiers - 'u' - unsigned */
3025 /* pointer modifiers - 'g' - generic */
3029 /* 'F' - function */
3030 /* examples : "ig*" - generic int * */
3031 /* "cx*" - char xdata * */
3032 /* "ui" - unsigned int */
3033 /*-----------------------------------------------------------------*/
3034 sym_link *typeFromStr (char *s)
3036 sym_link *r = newLink(DECLARATOR);
3048 r->class = SPECIFIER;
3049 SPEC_NOUN(r) = V_CHAR;
3053 r->class = SPECIFIER;
3054 SPEC_NOUN(r) = V_INT;
3057 r->class = SPECIFIER;
3058 SPEC_NOUN(r) = V_INT;
3062 r->class = SPECIFIER;
3063 SPEC_NOUN(r) = V_FLOAT;
3066 r->class = SPECIFIER;
3067 SPEC_NOUN(r) = V_VOID;
3070 DCL_TYPE(r) = port->unqualified_pointer;
3077 assert(*(s+1)=='*');
3078 nr = newLink(DECLARATOR);
3083 DCL_TYPE(r) = GPOINTER;
3086 DCL_TYPE(r) = FPOINTER;
3089 DCL_TYPE(r) = CPOINTER;
3092 DCL_TYPE(r) = POINTER;
3095 DCL_TYPE(r) = FUNCTION;
3096 nr = newLink(DECLARATOR);
3099 DCL_TYPE(r) = CPOINTER;
3105 werror(E_INTERNAL_ERROR, __FILE__, __LINE__,
3106 "typeFromStr: unknown type");
3109 if (IS_SPEC(r) && usign) {
3118 /*-----------------------------------------------------------------*/
3119 /* initCSupport - create functions for C support routines */
3120 /*-----------------------------------------------------------------*/
3124 const char *smuldivmod[] =
3128 const char *sbwd[] =
3130 "char", "int", "long"
3136 const char *srlrr[] =
3141 int bwd, su, muldivmod, tofrom, rlrr;
3143 if (getenv("SDCC_NO_C_SUPPORT")) {
3144 /* for debugging only */
3148 floatType = newFloatLink ();
3150 for (bwd = 0; bwd < 3; bwd++)
3167 __multypes[bwd][0] = l;
3168 __multypes[bwd][1] = copyLinkChain (l);
3169 SPEC_USIGN (__multypes[bwd][1]) = 1;
3172 __fsadd = funcOfType ("__fsadd", floatType, floatType, 2, options.float_rent);
3173 __fssub = funcOfType ("__fssub", floatType, floatType, 2, options.float_rent);
3174 __fsmul = funcOfType ("__fsmul", floatType, floatType, 2, options.float_rent);
3175 __fsdiv = funcOfType ("__fsdiv", floatType, floatType, 2, options.float_rent);
3176 __fseq = funcOfType ("__fseq", CHARTYPE, floatType, 2, options.float_rent);
3177 __fsneq = funcOfType ("__fsneq", CHARTYPE, floatType, 2, options.float_rent);
3178 __fslt = funcOfType ("__fslt", CHARTYPE, floatType, 2, options.float_rent);
3179 __fslteq = funcOfType ("__fslteq", CHARTYPE, floatType, 2, options.float_rent);
3180 __fsgt = funcOfType ("__fsgt", CHARTYPE, floatType, 2, options.float_rent);
3181 __fsgteq = funcOfType ("__fsgteq", CHARTYPE, floatType, 2, options.float_rent);
3183 for (tofrom = 0; tofrom < 2; tofrom++)
3185 for (bwd = 0; bwd < 3; bwd++)
3187 for (su = 0; su < 2; su++)
3191 SNPRINTF (buffer, sizeof(buffer), "__fs2%s%s", ssu[su], sbwd[bwd]);
3192 __conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], floatType, 1, options.float_rent);
3196 SNPRINTF (buffer, sizeof(buffer), "__%s%s2fs", ssu[su], sbwd[bwd]);
3197 __conv[tofrom][bwd][su] = funcOfType (buffer, floatType, __multypes[bwd][su], 1, options.float_rent);
3204 for (muldivmod = 0; muldivmod < 3; muldivmod++)
3206 for (bwd = 0; bwd < 3; bwd++)
3208 for (su = 0; su < 2; su++)
3210 SNPRINTF (buffer, sizeof(buffer),
3212 smuldivmod[muldivmod],
3215 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3216 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3221 muluint() and mulsint() resp. mululong() and mulslong() return the same result.
3222 Therefore they've been merged into mulint() and mullong().
3225 for (bwd = 0; bwd < 3; bwd++)
3227 for (su = 0; su < 2; su++)
3229 for (muldivmod = 1; muldivmod < 3; muldivmod++)
3232 SNPRINTF (buffer, sizeof(buffer),
3234 smuldivmod[muldivmod],
3237 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3238 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3246 for (su = 0; su < 2; su++)
3248 /* muluchar and mulschar are still separate functions, because e.g. the z80
3249 port is sign/zero-extending to int before calling mulint() */
3250 SNPRINTF (buffer, sizeof(buffer),
3252 smuldivmod[muldivmod],
3255 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3256 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3260 /* word and doubleword */
3261 for (bwd = 1; bwd < 3; bwd++)
3264 SNPRINTF (buffer, sizeof(buffer),
3266 smuldivmod[muldivmod],
3268 __muldiv[muldivmod][bwd][0] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3269 FUNC_NONBANKED (__muldiv[muldivmod][bwd][0]->type) = 1;
3270 /* signed = unsigned */
3271 __muldiv[muldivmod][bwd][1] = __muldiv[muldivmod][bwd][0];
3274 for (rlrr = 0; rlrr < 2; rlrr++)
3276 for (bwd = 0; bwd < 3; bwd++)
3278 for (su = 0; su < 2; su++)
3280 SNPRINTF (buffer, sizeof(buffer),
3285 __rlrr[rlrr][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[0][0], 2, options.intlong_rent);
3286 FUNC_NONBANKED (__rlrr[rlrr][bwd][su]->type) = 1;
3292 /*-----------------------------------------------------------------*/
3293 /* initBuiltIns - create prototypes for builtin functions */
3294 /*-----------------------------------------------------------------*/
3300 if (!port->builtintable) return ;
3302 for (i = 0 ; port->builtintable[i].name ; i++) {
3303 sym = funcOfTypeVarg(port->builtintable[i].name,port->builtintable[i].rtype,
3304 port->builtintable[i].nParms,port->builtintable[i].parm_types);
3305 FUNC_ISBUILTIN(sym->type) = 1;
3306 FUNC_ISREENT(sym->type) = 0; /* can never be reentrant */
3310 sym_link *validateLink(sym_link *l,
3317 if (l && l->class==select)
3322 "Internal error: validateLink failed in %s(%s) @ %s:%u:"
3323 " expected %s, got %s\n",
3324 macro, args, file, line,
3325 DECLSPEC2TXT(select), l ? DECLSPEC2TXT(l->class) : "null-link");
3327 return l; // never reached, makes compiler happy.
3330 /*--------------------------------------------------------------------*/
3331 /* newEnumType - create an integer type compatible with enumerations */
3332 /*--------------------------------------------------------------------*/
3334 newEnumType (symbol *enumlist)
3342 type = newLink (SPECIFIER);
3343 SPEC_NOUN (type) = V_INT;
3347 /* Determine the range of the enumerated values */
3349 min = max = (int) floatFromVal (valFromType (sym->type));
3350 for (sym = sym->next; sym; sym = sym->next)
3352 v = (int) floatFromVal (valFromType (sym->type));
3359 /* Determine the smallest integer type that is compatible with this range */
3360 type = newLink (SPECIFIER);
3361 if (min>=0 && max<=255)
3363 SPEC_NOUN (type) = V_CHAR;
3364 SPEC_USIGN (type) = 1;
3366 else if (min>=-128 && max<=127)
3368 SPEC_NOUN (type) = V_CHAR;
3370 else if (min>=0 && max<=65535)
3372 SPEC_NOUN (type) = V_INT;
3373 SPEC_USIGN (type) = 1;
3375 else if (min>=-32768 && max<=32767)
3377 SPEC_NOUN (type) = V_INT;
3381 SPEC_NOUN (type) = V_INT;
3382 SPEC_LONG (type) = 1;
3384 SPEC_USIGN (type) = 1;