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 bytes */
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 /* checkStructFlexArray - check tree behind a struct */
865 /*------------------------------------------------------------------*/
867 checkStructFlexArray (symbol *sym, sym_link *p)
869 /* if nothing return FALSE */
875 /* (nested) struct with flexible array member? */
876 if (IS_STRUCT (p) && SPEC_STRUCT (p)->b_flexArrayMember)
878 werror (W_INVALID_FLEXARRAY);
884 /* this is a declarator */
887 /* flexible array member? */
890 if (!options.std_c99)
891 werror (W_C89_NO_FLEXARRAY);
895 return checkStructFlexArray (sym, p->next);
900 /*------------------------------------------------------------------*/
901 /* bitsForType - returns # of bits required to store this type */
902 /*------------------------------------------------------------------*/
904 bitsForType (sym_link * p)
906 /* if nothing return 0 */
911 { /* if this is the specifier then */
913 switch (SPEC_NOUN (p))
914 { /* depending on the specifier type */
916 return (IS_LONG (p) ? LONGSIZE * 8 : INTSIZE * 8);
918 return FLOATSIZE * 8;
926 return SPEC_STRUCT (p)->size * 8;
933 return SPEC_BLEN (p);
939 /* this is a specifier */
940 switch (DCL_TYPE (p))
943 return DCL_ELEM (p) * getSize (p->next) * 8;
947 return (PTRSIZE * 8);
952 return (FPTRSIZE * 8);
954 return (GPTRSIZE * 8);
961 /*------------------------------------------------------------------*/
962 /* copySymbolChain - copies a symbol chain */
963 /*------------------------------------------------------------------*/
965 copySymbolChain (symbol * src)
972 dest = copySymbol (src);
973 dest->next = copySymbolChain (src->next);
977 /*------------------------------------------------------------------*/
978 /* copySymbol - makes a copy of a symbol */
979 /*------------------------------------------------------------------*/
981 copySymbol (symbol * src)
988 dest = newSymbol (src->name, src->level);
989 memcpy (dest, src, sizeof (symbol));
990 dest->level = src->level;
991 dest->block = src->block;
992 dest->ival = copyIlist (src->ival);
993 dest->type = copyLinkChain (src->type);
994 dest->etype = getSpec (dest->type);
996 dest->key = src->key;
997 dest->allocreq = src->allocreq;
1001 /*------------------------------------------------------------------*/
1002 /* reverseSyms - reverses the links for a symbol chain */
1003 /*------------------------------------------------------------------*/
1005 reverseSyms (symbol * sym)
1007 symbol *prev, *curr, *next;
1022 sym->next = (void *) NULL;
1026 /*------------------------------------------------------------------*/
1027 /* reverseLink - reverses the links for a type chain */
1028 /*------------------------------------------------------------------*/
1030 reverseLink (sym_link * type)
1032 sym_link *prev, *curr, *next;
1047 type->next = (void *) NULL;
1051 /*------------------------------------------------------------------*/
1052 /* addSymChain - adds a symbol chain to the symboltable */
1053 /*------------------------------------------------------------------*/
1055 addSymChain (symbol ** symHead)
1057 symbol *sym = *symHead;
1058 symbol *csym = NULL;
1062 for (; sym != NULL; sym = sym->next)
1064 changePointer(sym->type);
1065 checkTypeSanity(sym->etype, sym->name);
1067 if (!sym->level && !(IS_SPEC(sym->etype) && IS_TYPEDEF(sym->etype)))
1070 /* if already exists in the symbol table then check if
1071 one of them is an extern definition if yes then
1072 then check if the type match, if the types match then
1073 delete the current entry and add the new entry */
1074 if ((csym = findSymWithLevel (SymbolTab, sym)) &&
1075 csym->level == sym->level) {
1077 /* If the previous definition was for an array with incomplete */
1078 /* type, and the new definition has completed the type, update */
1079 /* the original type to match */
1080 if (IS_DECL(csym->type) && DCL_TYPE(csym->type)==ARRAY
1081 && IS_DECL(sym->type) && DCL_TYPE(sym->type)==ARRAY)
1083 if (!DCL_ELEM(csym->type) && DCL_ELEM(sym->type))
1084 DCL_ELEM(csym->type) = DCL_ELEM(sym->type);
1088 /* If only one of the definitions used the "at" keyword, copy */
1089 /* the address to the other. */
1090 if (IS_SPEC(csym->etype) && SPEC_ABSA(csym->etype)
1091 && IS_SPEC(sym->etype) && !SPEC_ABSA(sym->etype))
1093 SPEC_ABSA (sym->etype) = 1;
1094 SPEC_ADDR (sym->etype) = SPEC_ADDR (csym->etype);
1096 if (IS_SPEC(csym->etype) && !SPEC_ABSA(csym->etype)
1097 && IS_SPEC(sym->etype) && SPEC_ABSA(sym->etype))
1099 SPEC_ABSA (csym->etype) = 1;
1100 SPEC_ADDR (csym->etype) = SPEC_ADDR (sym->etype);
1105 if (csym->ival && sym->ival)
1107 if (compareTypeExact (csym->type, sym->type, sym->level) != 1)
1111 /* one definition extern ? */
1112 if (IS_EXTERN (csym->etype) || IS_EXTERN (sym->etype))
1113 werror (E_EXTERN_MISMATCH, sym->name);
1115 werror (E_DUPLICATE, sym->name);
1116 werrorfl (csym->fileDef, csym->lineDef, E_PREVIOUS_DEF);
1118 fprintf (stderr, "from type '");
1119 printTypeChain (csym->type, stderr);
1120 if (IS_SPEC (csym->etype) && SPEC_ABSA (csym->etype))
1121 fprintf(stderr, " at 0x%x", SPEC_ADDR (csym->etype));
1122 fprintf (stderr, "'\nto type '");
1123 printTypeChain (sym->type, stderr);
1124 if (IS_SPEC (sym->etype) && SPEC_ABSA (sym->etype))
1125 fprintf(stderr, " at 0x%x", SPEC_ADDR (sym->etype));
1126 fprintf (stderr, "'\n");
1131 if (csym->ival && !sym->ival)
1132 sym->ival = csym->ival;
1134 /* delete current entry */
1135 deleteSym (SymbolTab, csym, csym->name);
1136 deleteFromSeg(csym);
1138 symPtrPtr = symHead;
1139 while (*symPtrPtr && *symPtrPtr != csym)
1140 symPtrPtr = &(*symPtrPtr)->next;
1141 if (*symPtrPtr == csym)
1142 *symPtrPtr = csym->next;
1147 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
1152 /*------------------------------------------------------------------*/
1153 /* funcInChain - DCL Type 'FUNCTION' found in type chain */
1154 /*------------------------------------------------------------------*/
1156 funcInChain (sym_link * lnk)
1167 /*------------------------------------------------------------------*/
1168 /* structElemType - returns the type info of a struct member */
1169 /*------------------------------------------------------------------*/
1171 structElemType (sym_link * stype, value * id)
1173 symbol *fields = (SPEC_STRUCT (stype) ? SPEC_STRUCT (stype)->fields : NULL);
1174 sym_link *type, *etype;
1175 sym_link *petype = getSpec (stype);
1179 /* look for the id */
1182 if (strcmp (fields->rname, id->name) == 0)
1184 type = copyLinkChain (fields->type);
1185 etype = getSpec (type);
1186 SPEC_SCLS (etype) = (SPEC_SCLS (petype) == S_REGISTER ?
1187 SPEC_SCLS (etype) : SPEC_SCLS (petype));
1189 SPEC_CONST (type) |= SPEC_CONST (stype);
1191 DCL_PTR_CONST (type) |= SPEC_CONST (stype);
1194 fields = fields->next;
1198 werror (E_NOT_MEMBER, id->name);
1200 // the show must go on
1201 return newIntLink();
1204 /*------------------------------------------------------------------*/
1205 /* getStructElement - returns element of a tructure definition */
1206 /*------------------------------------------------------------------*/
1208 getStructElement (structdef * sdef, symbol * sym)
1212 for (field = sdef->fields; field; field = field->next)
1213 if (strcmp (field->name, sym->name) == 0)
1216 werror (E_NOT_MEMBER, sym->name);
1218 return sdef->fields;
1221 /*------------------------------------------------------------------*/
1222 /* compStructSize - computes the size of a structure */
1223 /*------------------------------------------------------------------*/
1225 compStructSize (int su, structdef * sdef)
1227 int sum = 0, usum = 0;
1231 /* for the identifiers */
1232 loop = sdef->fields;
1235 /* create the internal name for this variable */
1236 SNPRINTF (loop->rname, sizeof(loop->rname), "_%s", loop->name);
1241 SPEC_VOLATILE (loop->etype) |= (su == UNION ? 1 : 0);
1243 /* if this is a bit field */
1246 /* change it to a unsigned bit */
1247 SPEC_NOUN (loop->etype) = V_BITFIELD;
1248 /* ISO/IEC 9899 J.3.9 implementation defined behaviour: */
1249 /* a "plain" int bitfield is unsigned */
1250 if (!loop->etype->select.s.b_signed)
1251 SPEC_USIGN(loop->etype) = 1;
1253 SPEC_BLEN (loop->etype) = loop->bitVar;
1255 if (loop->bitVar == BITVAR_PAD) {
1256 /* A zero length bitfield forces padding */
1257 SPEC_BSTR (loop->etype) = bitOffset;
1258 SPEC_BLEN (loop->etype) = 0;
1263 if (bitOffset == 8) {
1267 /* check if this fit into the remaining */
1268 /* bits of this byte else align it to the */
1269 /* next byte boundary */
1270 if (loop->bitVar <= (8 - bitOffset)) {
1271 /* fits into current byte */
1273 SPEC_BSTR (loop->etype) = bitOffset;
1274 bitOffset += loop->bitVar;
1276 else if (!bitOffset) {
1277 /* does not fit, but is already byte aligned */
1279 SPEC_BSTR (loop->etype) = bitOffset;
1280 bitOffset += loop->bitVar;
1283 /* does not fit; need to realign first */
1285 loop->offset = (su == UNION ? sum = 0 : sum);
1287 SPEC_BSTR (loop->etype) = bitOffset;
1288 bitOffset += loop->bitVar;
1290 while (bitOffset>8) {
1297 /* This is a non-bit field. Make sure we are */
1298 /* byte aligned first */
1301 loop->offset = (su == UNION ? sum = 0 : sum);
1305 checkDecl (loop, 1);
1306 sum += getSize (loop->type);
1308 /* search for "flexibel array members" */
1309 /* and do some syntax checks */
1311 && checkStructFlexArray (loop, loop->type))
1313 /* found a "flexible array member" */
1314 sdef->b_flexArrayMember = TRUE;
1315 /* is another struct-member following? */
1317 werror (E_FLEXARRAY_NOTATEND);
1318 /* is it the first struct-member? */
1319 else if (loop == sdef->fields)
1320 werror (E_FLEXARRAY_INEMPTYSTRCT);
1326 /* if union then size = sizeof largest field */
1328 /* For UNION, round up after each field */
1329 sum += ((bitOffset+7)/8);
1330 usum = max (usum, sum);
1335 /* For STRUCT, round up after all fields processed */
1337 sum += ((bitOffset+7)/8);
1339 return (su == UNION ? usum : sum);
1342 /*-------------------------------------------------------------------*/
1343 /* promoteAnonStructs - promote anonymous struct/union's fields into */
1344 /* an enclosing struct/union */
1345 /*-------------------------------------------------------------------*/
1347 promoteAnonStructs (int su, structdef * sdef)
1356 tofield = &sdef->fields;
1357 field = sdef->fields;
1360 nextfield = field->next;
1361 if (!*field->name && IS_STRUCT (field->type))
1363 /* Found an anonymous struct/union. Replace it */
1364 /* with the fields it contains and adjust all */
1367 base = field->offset;
1368 subfield = copySymbolChain (SPEC_STRUCT (field->type)->fields);
1370 continue; /* just in case it's empty */
1372 *tofield = subfield;
1375 /* check for field name conflicts resulting from promotion */
1376 dupfield = sdef->fields;
1377 while (dupfield && dupfield != subfield)
1379 if (*subfield->name && !strcmp (dupfield->name, subfield->name))
1381 werrorfl (subfield->fileDef, subfield->lineDef,
1383 su==STRUCT ? "struct" : "union",
1385 werrorfl (dupfield->fileDef, dupfield->lineDef,
1388 dupfield = dupfield->next;
1391 subfield->offset += base;
1393 subfield = subfield->next;
1397 subfield->next = nextfield;
1398 tofield = &subfield->next;
1401 tofield = &field->next;
1407 /*------------------------------------------------------------------*/
1408 /* checkSClass - check the storage class specification */
1409 /*------------------------------------------------------------------*/
1411 checkSClass (symbol * sym, int isProto)
1415 if (getenv("DEBUG_SANITY")) {
1416 fprintf (stderr, "checkSClass: %s \n", sym->name);
1419 /* type is literal can happen for enums change
1421 if (SPEC_SCLS (sym->etype) == S_LITERAL && !SPEC_ENUM (sym->etype))
1422 SPEC_SCLS (sym->etype) = S_AUTO;
1424 /* if sfr or sbit then must also be volatile */
1425 if (SPEC_SCLS (sym->etype) == S_SBIT ||
1426 SPEC_SCLS (sym->etype) == S_SFR)
1428 SPEC_VOLATILE (sym->etype) = 1;
1431 /* if absolute address given then it mark it as
1432 volatile -- except in the PIC port */
1434 #if !OPT_DISABLE_PIC || !OPT_DISABLE_PIC16
1435 /* The PIC port uses a different peep hole optimizer based on "pCode" */
1436 if (!TARGET_IS_PIC && !TARGET_IS_PIC16)
1439 if (IS_ABSOLUTE (sym->etype))
1440 SPEC_VOLATILE (sym->etype) = 1;
1442 if (TARGET_IS_MCS51 &&
1443 IS_ABSOLUTE (sym->etype) &&
1444 SPEC_SCLS (sym->etype) == S_SFR)
1449 if (SPEC_NOUN (sym->etype) == V_CHAR)
1451 else if (SPEC_LONG (sym->etype) == 0)
1456 addr = SPEC_ADDR (sym->etype);
1457 for (n=0; n<size; n+=8)
1458 if (((addr >> n) & 0xFF) < 0x80)
1459 werror (W_SFR_ABSRANGE, sym->name);
1462 /* If code memory is read only, then pointers to code memory */
1463 /* implicitly point to constants -- make this explicit */
1465 while (t && t->next) {
1466 if (IS_CODEPTR(t) && port->mem.code_ro) {
1467 if (IS_SPEC(t->next)) {
1468 SPEC_CONST (t->next) = 1;
1470 DCL_PTR_CONST (t->next) = 1;
1476 /* global variables declared const put into code */
1477 /* if no other storage class specified */
1478 if (sym->level == 0 &&
1479 SPEC_SCLS(sym->etype) == S_FIXED &&
1480 !IS_FUNC(sym->type)) {
1481 /* find the first non-array link */
1485 if (IS_CONSTANT (t)) {
1486 SPEC_SCLS (sym->etype) = S_CODE;
1490 /* global variable in code space is a constant */
1491 if (sym->level == 0 &&
1492 SPEC_SCLS (sym->etype) == S_CODE &&
1493 port->mem.code_ro) {
1494 /* find the first non-array link */
1501 DCL_PTR_CONST (t) = 1;
1505 /* if bit variable then no storage class can be */
1506 /* specified since bit is already a storage */
1507 if (IS_BITVAR (sym->etype) &&
1508 (SPEC_SCLS (sym->etype) != S_FIXED &&
1509 SPEC_SCLS (sym->etype) != S_SBIT &&
1510 SPEC_SCLS (sym->etype) != S_BIT)
1513 werror (E_BITVAR_STORAGE, sym->name);
1514 SPEC_SCLS (sym->etype) = S_FIXED;
1517 /* extern variables cannot be initialized */
1518 if (IS_EXTERN (sym->etype) && sym->ival)
1520 werror (E_EXTERN_INIT, sym->name);
1524 /* if this is an automatic symbol */
1525 if (sym->level && (options.stackAuto || reentrant)) {
1526 if (SPEC_SCLS (sym->etype) != S_BIT) {
1527 if ((SPEC_SCLS (sym->etype) == S_AUTO ||
1528 SPEC_SCLS (sym->etype) == S_FIXED ||
1529 SPEC_SCLS (sym->etype) == S_REGISTER ||
1530 SPEC_SCLS (sym->etype) == S_STACK ||
1531 SPEC_SCLS (sym->etype) == S_XSTACK)) {
1532 SPEC_SCLS (sym->etype) = S_AUTO;
1534 /* storage class may only be specified for statics */
1535 if (!IS_STATIC(sym->etype)) {
1536 werror (E_AUTO_ASSUMED, sym->name);
1542 /* automatic symbols cannot be given */
1543 /* an absolute address ignore it */
1545 SPEC_ABSA (sym->etype) &&
1546 (options.stackAuto || reentrant))
1548 werror (E_AUTO_ABSA, sym->name);
1549 SPEC_ABSA (sym->etype) = 0;
1552 /* arrays & pointers cannot be defined for bits */
1553 /* SBITS or SFRs or BIT */
1554 if ((IS_ARRAY (sym->type) || IS_PTR (sym->type)) &&
1555 !IS_FUNCPTR (sym->type) &&
1556 (SPEC_NOUN (sym->etype) == V_BIT ||
1557 SPEC_NOUN (sym->etype) == V_SBIT ||
1558 SPEC_NOUN (sym->etype) == V_BITFIELD ||
1559 SPEC_SCLS (sym->etype) == S_SFR))
1560 werror (E_BIT_ARRAY, sym->name);
1562 /* if this is a bit|sbit then set length & start */
1563 if (SPEC_NOUN (sym->etype) == V_BIT ||
1564 SPEC_NOUN (sym->etype) == V_SBIT)
1566 SPEC_BLEN (sym->etype) = 1;
1567 SPEC_BSTR (sym->etype) = 0;
1571 /* variables declared in CODE space must have */
1572 /* initializers if not an extern */
1573 if (SPEC_SCLS (sym->etype) == S_CODE &&
1574 sym->ival == NULL &&
1577 port->mem.code_ro &&
1578 !IS_EXTERN (sym->etype) &&
1579 !funcInChain (sym->type))
1580 werror (E_CODE_NO_INIT, sym->name);
1583 /* if parameter or local variable then change */
1584 /* the storage class to reflect where the var will go */
1585 if (sym->level && SPEC_SCLS (sym->etype) == S_FIXED
1586 && !IS_STATIC(sym->etype)
1589 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
1591 SPEC_SCLS (sym->etype) = (options.useXstack ?
1592 S_XSTACK : S_STACK);
1596 /* hack-o-matic! I see no reason why the useXstack option should ever
1597 * control this allocation, but the code was originally that way, and
1598 * changing it for non-390 ports breaks the compiler badly.
1600 bool useXdata = (TARGET_IS_DS390 || TARGET_IS_DS400) ?
1601 1 : options.useXstack;
1602 SPEC_SCLS (sym->etype) = (useXdata ?
1608 /*------------------------------------------------------------------*/
1609 /* changePointer - change pointer to functions */
1610 /*------------------------------------------------------------------*/
1612 changePointer (sym_link * p)
1615 /* go thru the chain of declarations */
1616 /* if we find a pointer to a function */
1617 /* change it to a ptr to code area */
1618 /* unless the function is banked. */
1619 for (; p; p = p->next)
1621 if (!IS_SPEC (p) && DCL_TYPE (p) == UPOINTER)
1622 DCL_TYPE (p) = port->unqualified_pointer;
1623 if (IS_PTR (p) && IS_FUNC (p->next))
1624 if (!IFFUNC_BANKED(p->next))
1625 DCL_TYPE (p) = CPOINTER;
1629 /*------------------------------------------------------------------*/
1630 /* checkDecl - does semantic validation of a declaration */
1631 /*------------------------------------------------------------------*/
1633 checkDecl (symbol * sym, int isProto)
1636 checkSClass (sym, isProto); /* check the storage class */
1637 changePointer (sym->type); /* change pointers if required */
1639 /* if this is an array without any dimension
1640 then update the dimension from the initial value */
1641 if (IS_ARRAY (sym->type) && !DCL_ELEM (sym->type))
1642 DCL_ELEM (sym->type) = getNelements (sym->type, sym->ival);
1647 /*------------------------------------------------------------------*/
1648 /* copyLinkChain - makes a copy of the link chain & rets ptr 2 head */
1649 /*------------------------------------------------------------------*/
1651 copyLinkChain (sym_link * p)
1653 sym_link *head, *curr, *loop;
1655 /* note: v_struct and v_struct->fields are not copied! */
1657 head = loop = (curr ? newLink (p->class) : (void *) NULL);
1660 memcpy (loop, curr, sizeof (sym_link)); /* copy it */
1661 loop->next = (curr->next ? newLink (curr->next->class) : (void *) NULL);
1669 /*------------------------------------------------------------------*/
1670 /* cleanUpBlock - cleansup the symbol table specified for all the */
1671 /* symbols in the given block */
1672 /*------------------------------------------------------------------*/
1674 cleanUpBlock (bucket ** table, int block)
1679 /* go thru the entire table */
1680 for (i = 0; i < 256; i++)
1682 for (chain = table[i]; chain; chain = chain->next)
1684 if (chain->block >= block)
1686 deleteSym (table, chain->sym, chain->name);
1692 /*------------------------------------------------------------------*/
1693 /* cleanUpLevel - cleansup the symbol table specified for all the */
1694 /* symbols in the given level */
1695 /*------------------------------------------------------------------*/
1697 cleanUpLevel (bucket ** table, int level)
1702 /* go thru the entire table */
1703 for (i = 0; i < 256; i++)
1705 for (chain = table[i]; chain; chain = chain->next)
1707 if (chain->level >= level)
1709 deleteSym (table, chain->sym, chain->name);
1715 /*------------------------------------------------------------------*/
1716 /* computeTypeOr - computes the resultant type from two types */
1717 /*------------------------------------------------------------------*/
1719 computeTypeOr (sym_link * etype1, sym_link * etype2, sym_link * reType)
1722 assert ( (IS_CHAR (etype1) || IS_BIT (etype1))
1723 && (IS_CHAR (etype2) || IS_BIT (etype2)));
1725 if (SPEC_USIGN (etype1) == SPEC_USIGN (etype2))
1727 SPEC_USIGN (reType) = SPEC_USIGN (etype1);
1731 if (SPEC_USIGN (etype1))
1733 if ( IS_LITERAL (etype2)
1734 && floatFromVal (valFromType (etype2)) >= 0)
1735 SPEC_USIGN (reType) = 1;
1738 /* promote to int */
1739 SPEC_USIGN (reType) = 0;
1740 SPEC_NOUN (reType) = V_INT;
1743 else /* etype1 signed */
1745 if ( IS_LITERAL (etype2)
1746 && floatFromVal (valFromType (etype2)) <= 127)
1747 SPEC_USIGN (reType) = 0;
1750 /* promote to int */
1751 SPEC_USIGN (reType) = 0;
1752 SPEC_NOUN (reType) = V_INT;
1756 if (SPEC_USIGN (etype2))
1758 if ( IS_LITERAL (etype1)
1759 && floatFromVal (valFromType (etype1)) >= 0)
1760 SPEC_USIGN (reType) = 1;
1763 /* promote to int */
1764 SPEC_USIGN (reType) = 0;
1765 SPEC_NOUN (reType) = V_INT;
1768 else /* etype2 signed */
1770 if ( IS_LITERAL (etype1)
1771 && floatFromVal (valFromType (etype1)) <= 127)
1772 SPEC_USIGN (reType) = 0;
1775 /* promote to int */
1776 SPEC_USIGN (reType) = 0;
1777 SPEC_NOUN (reType) = V_INT;
1783 /*------------------------------------------------------------------*/
1784 /* computeType - computes the resultant type from two types */
1785 /*------------------------------------------------------------------*/
1787 computeType (sym_link * type1, sym_link * type2,
1788 RESULT_TYPE resultType, int op)
1792 sym_link *etype1 = getSpec (type1);
1795 etype2 = type2 ? getSpec (type2) : type1;
1797 /* if one of them is a float then result is a float */
1798 /* here we assume that the types passed are okay */
1799 /* and can be cast to one another */
1800 /* which ever is greater in size */
1801 if (IS_FLOAT (etype1) || IS_FLOAT (etype2))
1802 rType = newFloatLink ();
1803 /* if both are fixed16x16 then result is float */
1804 else if (IS_FIXED16X16(etype1) && IS_FIXED16X16(etype2))
1805 rType = newFixed16x16Link();
1806 else if (IS_FIXED16X16(etype1) && IS_FLOAT (etype2))
1807 rType = newFloatLink ();
1808 else if (IS_FLOAT (etype1) && IS_FIXED16X16 (etype2) )
1809 rType = newFloatLink ();
1811 /* if both are bitvars choose the larger one */
1812 else if (IS_BITVAR (etype1) && IS_BITVAR (etype2))
1813 rType = SPEC_BLEN (etype1) >= SPEC_BLEN (etype2) ?
1814 copyLinkChain (type1) : copyLinkChain (type1);
1816 /* if only one of them is a bit variable then the other one prevails */
1817 else if (IS_BITVAR (etype1) && !IS_BITVAR (etype2))
1819 rType = copyLinkChain (type2);
1820 /* bitfield can have up to 16 bits */
1821 if (getSize (etype1) > 1)
1822 SPEC_NOUN (getSpec (rType)) = V_INT;
1824 else if (IS_BITVAR (etype2) && !IS_BITVAR (etype1))
1826 rType = copyLinkChain (type1);
1827 /* bitfield can have up to 16 bits */
1828 if (getSize (etype2) > 1)
1829 SPEC_NOUN (getSpec (rType)) = V_INT;
1831 /* if one of them is a pointer or array then that
1833 else if (IS_PTR (type1) || IS_ARRAY (type1))
1834 rType = copyLinkChain (type1);
1835 else if (IS_PTR (type2) || IS_ARRAY (type2))
1836 rType = copyLinkChain (type2);
1837 else if (getSize (type1) > getSize (type2))
1838 rType = copyLinkChain (type1);
1840 rType = copyLinkChain (type2);
1842 reType = getSpec (rType);
1844 /* avoid conflicting types */
1845 reType->select.s.b_signed = 0;
1847 /* if result is a literal then make not so */
1848 if (IS_LITERAL (reType))
1849 SPEC_SCLS (reType) = S_REGISTER;
1853 case RESULT_TYPE_CHAR:
1854 if (IS_BITVAR (reType))
1856 SPEC_NOUN (reType) = V_CHAR;
1857 SPEC_SCLS (reType) = 0;
1858 SPEC_USIGN (reType) = 0;
1862 case RESULT_TYPE_INT:
1863 case RESULT_TYPE_NONE:
1864 case RESULT_TYPE_OTHER:
1865 if (IS_BIT (reType))
1867 SPEC_NOUN (reType) = V_CHAR;
1868 SPEC_SCLS (reType) = 0;
1869 SPEC_USIGN (reType) = 0;
1872 else if (IS_BITFIELD (reType))
1874 /* could be smarter, but it depends on the op */
1875 /* this is for the worst case: a multiplication of 4 * 4 bit */
1876 SPEC_NOUN (reType) = SPEC_BLEN (reType) <= 4 ? V_CHAR : V_INT;
1877 SPEC_SCLS (reType) = 0;
1878 SPEC_USIGN (reType) = 0;
1881 else if (IS_CHAR (reType))
1883 if (op == '|' || op == '^')
1884 return computeTypeOr (etype1, etype2, reType);
1886 && SPEC_USIGN (etype1) != SPEC_USIGN (etype2))
1888 SPEC_USIGN (reType) = 1;
1893 SPEC_NOUN (reType) = V_INT;
1894 SPEC_USIGN (reType) = 0;
1897 /* TODO: should be in SDCCast.c */
1899 && ( !SPEC_USIGN (etype1)
1900 || !SPEC_USIGN (etype2)))
1902 SPEC_NOUN (reType) = V_INT;
1903 SPEC_USIGN (reType) = 0;
1912 /* SDCC's sign promotion:
1913 - if one or both operands are unsigned, the resultant type will be unsigned
1914 (except char, see below)
1915 - if an operand is promoted to a larger type (char -> int, int -> long),
1916 the larger type will be signed
1918 SDCC tries hard to avoid promotion to int and does 8 bit calculation as
1919 much as possible. We're leaving ISO IEC 9899 here and have to extrapolate
1920 the standard. The standard demands, that the result has to be the same
1921 "as if" the promotion would have been performed:
1923 - if the result of an operation with two char's is promoted to a
1924 larger type, the result will be signed.
1926 More sophisticated are these:
1927 - if the result of an operation with two char's is a char again,
1928 the result will only then be unsigned, if both operands are
1929 unsigned. In all other cases the result will be signed.
1931 This seems to be contradictionary to the first two rules, but it makes
1932 real sense (all types are char's):
1934 A signed char can be negative; this must be preserved in the result
1937 Only if both operands are unsigned it's safe to make the result
1938 unsigned; this helps to avoid overflow:
1941 - ToDo: document '|', '^' and '&'
1943 Homework: - why is (200 * 200 < 0) true?
1944 - why is { char l = 200, r = 200; (r * l > 0) } true?
1947 if (!IS_FLOAT (reType)
1948 && ( (SPEC_USIGN (etype1)
1949 /* if this operand is promoted to a larger type,
1950 then it will be promoted to a signed type */
1951 && !(getSize (etype1) < getSize (reType))
1952 /* char require special handling */
1953 && !IS_CHAR (etype1))
1954 || /* same for 2nd operand */
1955 (SPEC_USIGN (etype2)
1956 && !(getSize (etype2) < getSize (reType))
1957 && !IS_CHAR (etype2))
1958 || /* if both are 'unsigned char' and not promoted
1959 let the result be unsigned too */
1960 ( SPEC_USIGN (etype1)
1961 && SPEC_USIGN (etype2)
1964 && IS_CHAR (reType))))
1965 SPEC_USIGN (reType) = 1;
1967 SPEC_USIGN (reType) = 0;
1972 /*--------------------------------------------------------------------*/
1973 /* compareType - will do type check return 1 if match, -1 if castable */
1974 /*--------------------------------------------------------------------*/
1976 compareType (sym_link * dest, sym_link * src)
1987 /* if dest is a declarator then */
1992 /* banked function pointer */
1993 if (IS_GENPTR (dest) && IS_GENPTR (src))
1995 if (IS_FUNC (src->next) && IS_VOID(dest->next))
1997 if (IS_FUNC (dest->next) && IS_VOID(src->next))
1999 return compareType (dest->next, src->next);
2002 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
2004 //checkFunction(src,dest);
2006 return compareType (dest->next, src->next);
2008 if (IS_PTR (dest) && IS_GENPTR (src) && IS_VOID(src->next)) {
2012 (IS_GENPTR (dest) ||
2013 ((DCL_TYPE(src) == POINTER) && (DCL_TYPE(dest) == IPOINTER))
2016 if (IS_PTR (dest) && IS_ARRAY (src)) {
2017 value *val=aggregateToPointer (valFromType(src));
2018 int res=compareType (dest, val->type);
2019 Safe_free(val->type);
2023 if (IS_PTR (dest) && IS_FUNC (dest->next) && IS_FUNC (src))
2024 return compareType (dest->next, src);
2027 else if (IS_PTR (dest) && IS_INTEGRAL (src))
2033 /* if one is a specifier and the other is not */
2034 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
2035 (IS_SPEC (dest) && !IS_SPEC (src)))
2038 /* if one of them is a void then ok */
2039 if (SPEC_NOUN (dest) == V_VOID &&
2040 SPEC_NOUN (src) != V_VOID)
2043 if (SPEC_NOUN (dest) != V_VOID &&
2044 SPEC_NOUN (src) == V_VOID)
2047 /* if they are both bitfields then if the lengths
2048 and starts don't match */
2049 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
2050 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
2051 SPEC_BSTR (dest) != SPEC_BSTR (src)))
2054 /* it is a specifier */
2055 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
2057 if (SPEC_USIGN (dest) == SPEC_USIGN (src) &&
2058 IS_INTEGRAL (dest) && IS_INTEGRAL (src) &&
2060 bitsForType (dest) == bitsForType (src))
2061 instead of the next two lines, but the regression tests fail with
2062 them; I guess it's a problem with replaceCheaperOp */
2063 getSize (dest) == getSize (src) &&
2064 !(!IS_BIT (dest) && IS_BIT (src)))
2066 else if (IS_ARITHMETIC (dest) && IS_ARITHMETIC (src))
2071 else if (IS_STRUCT (dest))
2073 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
2078 if (SPEC_LONG (dest) != SPEC_LONG (src))
2081 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
2087 /*--------------------------------------------------------------------*/
2088 /* compareTypeExact - will do type check return 1 if match exactly */
2089 /*--------------------------------------------------------------------*/
2091 compareTypeExact (sym_link * dest, sym_link * src, int level)
2093 STORAGE_CLASS srcScls, destScls;
2104 /* if dest is a declarator then */
2109 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
2110 if ((DCL_TYPE (src) == ARRAY) && (DCL_ELEM (src) != DCL_ELEM (dest)))
2112 if (DCL_PTR_CONST (src) != DCL_PTR_CONST (dest))
2114 if (DCL_PTR_VOLATILE (src) != DCL_PTR_VOLATILE (dest))
2118 value *exargs, *acargs, *checkValue;
2120 /* verify function return type */
2121 if (!compareTypeExact (dest->next, src->next, -1))
2123 if (FUNC_ISISR (dest) != FUNC_ISISR (src))
2125 if (FUNC_REGBANK (dest) != FUNC_REGBANK (src))
2127 if (IFFUNC_ISNAKED (dest) != IFFUNC_ISNAKED (src))
2130 if (IFFUNC_ISREENT (dest) != IFFUNC_ISREENT (src) && argCnt>1)
2134 /* compare expected args with actual args */
2135 exargs = FUNC_ARGS(dest);
2136 acargs = FUNC_ARGS(src);
2138 /* for all the expected args do */
2139 for (; exargs && acargs; exargs = exargs->next, acargs = acargs->next)
2141 //checkTypeSanity(acargs->etype, acargs->name);
2143 if (IS_AGGREGATE (acargs->type))
2145 checkValue = copyValue (acargs);
2146 aggregateToPointer (checkValue);
2149 checkValue = acargs;
2152 if (!compareTypeExact (exargs->type, checkValue->type, -1))
2157 /* if one them ended we have a problem */
2158 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2159 (!exargs && acargs && !IS_VOID (acargs->type)))
2163 return compareTypeExact (dest->next, src->next, level);
2170 /* if one is a specifier and the other is not */
2171 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
2172 (IS_SPEC (dest) && !IS_SPEC (src)))
2175 /* if one of them is a void then ok */
2176 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
2179 /* if they are both bitfields then if the lengths
2180 and starts don't match */
2181 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
2182 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
2183 SPEC_BSTR (dest) != SPEC_BSTR (src)))
2186 if (IS_INTEGRAL (dest))
2188 /* signedness must match */
2189 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
2191 /* size must match */
2192 if (SPEC_LONG (dest) != SPEC_LONG (src))
2194 if (SPEC_SHORT (dest) != SPEC_SHORT (src))
2198 if (IS_STRUCT (dest))
2200 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
2204 if (SPEC_CONST (dest) != SPEC_CONST (src))
2206 if (SPEC_VOLATILE (dest) != SPEC_VOLATILE (src))
2208 if (SPEC_STAT (dest) != SPEC_STAT (src))
2210 if (SPEC_ABSA (dest) != SPEC_ABSA (src))
2212 if (SPEC_ABSA (dest) && SPEC_ADDR (dest) != SPEC_ADDR (src))
2215 destScls = SPEC_SCLS (dest);
2216 srcScls = SPEC_SCLS (src);
2218 /* Compensate for const to const code change in checkSClass() */
2219 if (!level & port->mem.code_ro && SPEC_CONST (dest))
2221 if (srcScls == S_CODE && destScls == S_FIXED)
2223 if (destScls == S_CODE && srcScls == S_FIXED)
2227 /* compensate for allocGlobal() */
2228 if ((srcScls == S_FIXED || srcScls == S_AUTO)
2229 && port->mem.default_globl_map == xdata
2233 if (level>0 && !SPEC_STAT (dest))
2235 /* Compensate for hack-o-matic in checkSClass() */
2236 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
2238 if (destScls == S_FIXED)
2239 destScls = (options.useXstack ? S_XSTACK : S_STACK);
2240 if (srcScls == S_FIXED)
2241 srcScls = (options.useXstack ? S_XSTACK : S_STACK);
2243 else if (TARGET_IS_DS390 || TARGET_IS_DS400 || options.useXstack)
2245 if (destScls == S_FIXED)
2247 if (srcScls == S_FIXED)
2252 if (srcScls != destScls)
2255 printf ("level = %d\n", level);
2256 printf ("SPEC_SCLS (src) = %d, SPEC_SCLS (dest) = %d\n",
2257 SPEC_SCLS (src), SPEC_SCLS (dest));
2258 printf ("srcScls = %d, destScls = %d\n",srcScls, destScls);
2266 /*------------------------------------------------------------------*/
2267 /* inCalleeSaveList - return 1 if found in callee save list */
2268 /*------------------------------------------------------------------*/
2270 calleeCmp(void *p1, void *p2)
2272 return (strcmp((char *)p1, (char *)(p2)) == 0);
2276 inCalleeSaveList(char *s)
2278 if (options.all_callee_saves)
2280 return isinSetWith(options.calleeSavesSet, s, calleeCmp);
2283 /*-----------------------------------------------------------------*/
2284 /* aggregateToPointer: change an agggregate type function */
2285 /* argument to a pointer to that type. */
2286 /*-----------------------------------------------------------------*/
2288 aggregateToPointer (value * val)
2290 if (IS_AGGREGATE (val->type))
2292 /* if this is a structure */
2293 /* then we need to add a new link */
2294 if (IS_STRUCT (val->type))
2296 /* first lets add DECLARATOR type */
2297 sym_link *p = val->type;
2299 werror (W_STRUCT_AS_ARG, val->name);
2300 val->type = newLink (DECLARATOR);
2301 val->type->next = p;
2304 /* change to a pointer depending on the */
2305 /* storage class specified */
2306 switch (SPEC_SCLS (val->etype))
2309 DCL_TYPE (val->type) = IPOINTER;
2312 DCL_TYPE (val->type) = PPOINTER;
2315 if (SPEC_OCLS(val->etype)) {
2316 DCL_TYPE(val->type)=PTR_TYPE(SPEC_OCLS(val->etype));
2318 // this happens for (external) function parameters
2319 DCL_TYPE (val->type) = port->unqualified_pointer;
2325 DCL_TYPE (val->type) = POINTER;
2328 DCL_TYPE (val->type) = CPOINTER;
2331 DCL_TYPE (val->type) = FPOINTER;
2334 DCL_TYPE (val->type) = EEPPOINTER;
2337 DCL_TYPE (val->type) = port->unqualified_pointer;
2340 /* is there is a symbol associated then */
2341 /* change the type of the symbol as well */
2344 val->sym->type = copyLinkChain (val->type);
2345 val->sym->etype = getSpec (val->sym->type);
2350 /*------------------------------------------------------------------*/
2351 /* checkFunction - does all kinds of check on a function */
2352 /*------------------------------------------------------------------*/
2354 checkFunction (symbol * sym, symbol *csym)
2356 value *exargs, *acargs;
2360 if (getenv("DEBUG_SANITY")) {
2361 fprintf (stderr, "checkFunction: %s ", sym->name);
2364 if (!IS_DECL(sym->type) || DCL_TYPE(sym->type)!=FUNCTION)
2366 werror(E_SYNTAX_ERROR, sym->name);
2370 /* make sure the type is complete and sane */
2371 checkTypeSanity(((symbol *)sym)->etype, ((symbol *)sym)->name);
2373 /* if not type then some kind of error */
2377 /* if the function has no type then make it return int */
2378 if (!sym->type->next)
2379 sym->type->next = sym->etype = newIntLink ();
2381 /* function cannot return aggregate */
2382 if (IS_AGGREGATE (sym->type->next))
2384 werror (E_FUNC_AGGR, sym->name);
2388 /* check if this function is defined as calleeSaves
2389 then mark it as such */
2390 FUNC_CALLEESAVES(sym->type) = inCalleeSaveList (sym->name);
2392 /* if interrupt service routine */
2393 /* then it cannot have arguments */
2394 if (IFFUNC_ARGS(sym->type) && FUNC_ISISR (sym->type))
2396 if (!IS_VOID(FUNC_ARGS(sym->type)->type)) {
2397 werror (E_INT_ARGS, sym->name);
2398 FUNC_ARGS(sym->type)=NULL;
2402 if (IFFUNC_ISSHADOWREGS(sym->type) && !FUNC_ISISR (sym->type))
2404 werror (E_SHADOWREGS_NO_ISR, sym->name);
2408 for (argCnt=1, acargs = FUNC_ARGS(sym->type);
2410 acargs=acargs->next, argCnt++) {
2412 // this can happen for reentrant functions
2413 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2414 // the show must go on: synthesize a name and symbol
2415 SNPRINTF (acargs->name, sizeof(acargs->name), "_%s_PARM_%d", sym->name, argCnt);
2416 acargs->sym = newSymbol (acargs->name, 1);
2417 SPEC_OCLS (acargs->etype) = istack;
2418 acargs->sym->type = copyLinkChain (acargs->type);
2419 acargs->sym->etype = getSpec (acargs->sym->type);
2420 acargs->sym->_isparm = 1;
2421 strncpyz (acargs->sym->rname, acargs->name, sizeof(acargs->sym->rname));
2422 } else if (strcmp(acargs->sym->name, acargs->sym->rname)==0) {
2424 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2429 if (!csym && !(csym = findSym (SymbolTab, sym, sym->name)))
2430 return 1; /* not defined nothing more to check */
2432 /* check if body already present */
2433 if (csym && IFFUNC_HASBODY(csym->type))
2435 werror (E_FUNC_BODY, sym->name);
2439 /* check the return value type */
2440 if (compareType (csym->type, sym->type) <= 0)
2442 werror (E_PREV_DEF_CONFLICT, csym->name, "type");
2443 printFromToType(csym->type, sym->type);
2447 if (FUNC_ISISR (csym->type) != FUNC_ISISR (sym->type))
2449 werror (E_PREV_DEF_CONFLICT, csym->name, "interrupt");
2452 /* I don't think this is necessary for interrupts. An isr is a */
2453 /* root in the calling tree. */
2454 if ((FUNC_REGBANK (csym->type) != FUNC_REGBANK (sym->type)) &&
2455 (!FUNC_ISISR (sym->type)))
2457 werror (E_PREV_DEF_CONFLICT, csym->name, "using");
2460 if (IFFUNC_ISNAKED (csym->type) != IFFUNC_ISNAKED (sym->type))
2462 werror (E_PREV_DEF_CONFLICT, csym->name, "_naked");
2465 /* Really, reentrant should match regardless of argCnt, but */
2466 /* this breaks some existing code (the fp lib functions). If */
2467 /* the first argument is always passed the same way, this */
2468 /* lax checking is ok (but may not be true for in future ports) */
2469 if (IFFUNC_ISREENT (csym->type) != IFFUNC_ISREENT (sym->type)
2472 //printf("argCnt = %d\n",argCnt);
2473 werror (E_PREV_DEF_CONFLICT, csym->name, "reentrant");
2476 if (IFFUNC_ISWPARAM (csym->type) != IFFUNC_ISWPARAM (sym->type))
2478 werror (E_PREV_DEF_CONFLICT, csym->name, "wparam");
2481 if (IFFUNC_ISSHADOWREGS (csym->type) != IFFUNC_ISSHADOWREGS (sym->type))
2483 werror (E_PREV_DEF_CONFLICT, csym->name, "shadowregs");
2487 /* compare expected args with actual args */
2488 exargs = FUNC_ARGS(csym->type);
2489 acargs = FUNC_ARGS(sym->type);
2491 /* for all the expected args do */
2494 exargs = exargs->next, acargs = acargs->next, argCnt++)
2496 if (getenv("DEBUG_SANITY")) {
2497 fprintf (stderr, "checkFunction: %s ", exargs->name);
2499 /* make sure the type is complete and sane */
2500 checkTypeSanity(exargs->etype, exargs->name);
2502 /* If the actual argument is an array, any prototype
2503 * will have modified it to a pointer. Duplicate that
2506 if (IS_AGGREGATE (acargs->type))
2508 checkValue = copyValue (acargs);
2509 aggregateToPointer (checkValue);
2513 checkValue = acargs;
2516 if (compareType (exargs->type, checkValue->type) <= 0)
2518 werror (E_ARG_TYPE, argCnt);
2519 printFromToType(exargs->type, checkValue->type);
2524 /* if one them ended we have a problem */
2525 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2526 (!exargs && acargs && !IS_VOID (acargs->type)))
2527 werror (E_ARG_COUNT);
2529 /* replace with this defition */
2530 sym->cdef = csym->cdef;
2531 deleteSym (SymbolTab, csym, csym->name);
2532 deleteFromSeg(csym);
2533 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
2534 if (IS_EXTERN (csym->etype) && !
2535 IS_EXTERN (sym->etype))
2537 addSet (&publics, sym);
2542 /*------------------------------------------------------------------*/
2543 /* cdbStructBlock - calls struct printing for a blcks */
2544 /*------------------------------------------------------------------*/
2545 void cdbStructBlock (int block)
2548 bucket **table = StructTab;
2551 /* go thru the entire table */
2552 for (i = 0; i < 256; i++)
2554 for (chain = table[i]; chain; chain = chain->next)
2556 if (chain->block >= block)
2559 debugFile->writeType((structdef *)chain->sym, chain->block, 0, NULL);
2565 /*-----------------------------------------------------------------*/
2566 /* processFuncArgs - does some processing with function args */
2567 /*-----------------------------------------------------------------*/
2569 processFuncArgs (symbol * func)
2573 sym_link *funcType=func->type;
2575 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
2576 fprintf (stderr, "SDCCsymt.c:processFuncArgs(%s)\n", func->name);
2578 /* find the function declaration within the type */
2579 while (funcType && !IS_FUNC(funcType))
2580 funcType=funcType->next;
2582 /* if this function has variable argument list */
2583 /* then make the function a reentrant one */
2584 if (IFFUNC_HASVARARGS(funcType) || (options.stackAuto && !func->cdef))
2585 FUNC_ISREENT(funcType)=1;
2587 /* check if this function is defined as calleeSaves
2588 then mark it as such */
2589 FUNC_CALLEESAVES(funcType) = inCalleeSaveList (func->name);
2591 /* loop thru all the arguments */
2592 val = FUNC_ARGS(funcType);
2594 /* if it is void then remove parameters */
2595 if (val && IS_VOID (val->type))
2597 FUNC_ARGS(funcType) = NULL;
2601 /* reset regparm for the port */
2602 (*port->reset_regparms) ();
2604 /* if any of the arguments is an aggregate */
2605 /* change it to pointer to the same type */
2609 char buffer[SDCC_NAME_MAX+1];
2611 SNPRINTF (buffer, sizeof(buffer), "%s parameter %d", func->name, pNum);
2612 checkTypeSanity (val->etype, buffer);
2614 /* mark it as a register parameter if
2615 the function does not have VA_ARG
2616 and as port dictates */
2617 if (!IFFUNC_HASVARARGS(funcType) &&
2618 (argreg = (*port->reg_parm) (val->type, FUNC_ISREENT(funcType))))
2620 SPEC_REGPARM (val->etype) = 1;
2621 SPEC_ARGREG(val->etype) = argreg;
2622 } else if (IFFUNC_ISREENT(funcType)) {
2623 FUNC_HASSTACKPARM(funcType) = 1;
2626 if (IS_AGGREGATE (val->type))
2628 aggregateToPointer (val);
2635 /* if this is an internal generated function call */
2637 /* ignore --stack-auto for this one, we don't know how it is compiled */
2638 /* simply trust on --int-long-reent or --float-reent */
2639 if (IFFUNC_ISREENT(funcType)) {
2643 /* if this function is reentrant or */
2644 /* automatics r 2b stacked then nothing */
2645 if (IFFUNC_ISREENT (funcType) || options.stackAuto)
2649 val = FUNC_ARGS(funcType);
2654 /* if a symbolname is not given */
2655 /* synthesize a variable name */
2658 SNPRINTF (val->name, sizeof(val->name),
2659 "_%s_PARM_%d", func->name, pNum++);
2660 val->sym = newSymbol (val->name, 1);
2661 if (SPEC_SCLS(val->etype) == S_BIT)
2662 SPEC_OCLS (val->etype) = bit;
2664 SPEC_OCLS (val->etype) = port->mem.default_local_map;
2665 val->sym->type = copyLinkChain (val->type);
2666 val->sym->etype = getSpec (val->sym->type);
2667 val->sym->_isparm = 1;
2668 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2670 /* ?? static functions shouldn't imply static parameters - EEP */
2671 if (IS_SPEC(func->etype)) {
2672 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2673 SPEC_STAT (func->etype);
2676 addSymChain (&val->sym);
2679 else /* symbol name given create synth name */
2682 SNPRINTF (val->name, sizeof(val->name), "_%s_PARM_%d", func->name, pNum++);
2683 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2684 val->sym->_isparm = 1;
2685 if (SPEC_SCLS(val->etype) == S_BIT)
2686 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) = bit;
2688 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) =
2689 port->mem.default_local_map;
2692 /* ?? static functions shouldn't imply static parameters - EEP */
2693 if (IS_SPEC(func->etype)) {
2694 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2695 SPEC_STAT (func->etype);
2699 if (SPEC_OCLS (val->sym->etype) == pdata)
2700 val->sym->iaccess = 1;
2701 if (!isinSet(operKeyReset, val->sym)) {
2702 addSet (&operKeyReset, val->sym);
2703 applyToSet (operKeyReset, resetParmKey);
2709 /*-----------------------------------------------------------------*/
2710 /* isSymbolEqual - compares two symbols return 1 if they match */
2711 /*-----------------------------------------------------------------*/
2713 isSymbolEqual (symbol * dest, symbol * src)
2715 /* if pointers match then equal */
2719 /* if one of them is null then don't match */
2723 /* if both of them have rname match on rname */
2724 if (dest->rname[0] && src->rname[0])
2725 return (!strcmp (dest->rname, src->rname));
2727 /* otherwise match on name */
2728 return (!strcmp (dest->name, src->name));
2731 void PT(sym_link *type)
2733 printTypeChain(type,0);
2735 /*-----------------------------------------------------------------*/
2736 /* printTypeChain - prints the type chain in human readable form */
2737 /*-----------------------------------------------------------------*/
2739 printTypeChain (sym_link * start, FILE * of)
2743 sym_link * type, * search;
2753 fprintf (of, "void");
2757 /* Print the chain as it is written in the source: */
2758 /* start with the last entry. */
2759 /* However, the storage class at the end of the */
2760 /* chain reall applies to the first in the chain! */
2762 for (type = start; type && type->next; type = type->next)
2765 scls=SPEC_SCLS(type);
2773 case S_DATA: fprintf (of, "data-"); break;
2774 case S_XDATA: fprintf (of, "xdata-"); break;
2775 case S_SFR: fprintf (of, "sfr-"); break;
2776 case S_SBIT: fprintf (of, "sbit-"); break;
2777 case S_CODE: fprintf (of, "code-"); break;
2778 case S_IDATA: fprintf (of, "idata-"); break;
2779 case S_PDATA: fprintf (of, "pdata-"); break;
2780 case S_LITERAL: fprintf (of, "literal-"); break;
2781 case S_STACK: fprintf (of, "stack-"); break;
2782 case S_XSTACK: fprintf (of, "xstack-"); break;
2783 case S_BIT: fprintf (of, "bit-"); break;
2784 case S_EEPROM: fprintf (of, "eeprom-"); break;
2791 if (!IS_FUNC(type)) {
2792 if (DCL_PTR_VOLATILE (type)) {
2793 fprintf (of, "volatile-");
2795 if (DCL_PTR_CONST (type)) {
2796 fprintf (of, "const-");
2799 switch (DCL_TYPE (type))
2802 fprintf (of, "function %s %s",
2803 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2804 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2806 for (args = FUNC_ARGS(type);
2809 printTypeChain(args->type, of);
2816 fprintf (of, "generic* ");
2819 fprintf (of, "code* ");
2822 fprintf (of, "xdata* ");
2825 fprintf (of, "eeprom* ");
2828 fprintf (of, "near* ");
2831 fprintf (of, "idata* ");
2834 fprintf (of, "pdata* ");
2837 fprintf (of, "unknown* ");
2840 if (DCL_ELEM(type)) {
2841 fprintf (of, "[%d] ", DCL_ELEM(type));
2843 fprintf (of, "[] ");
2850 if (SPEC_VOLATILE (type))
2851 fprintf (of, "volatile-");
2852 if (SPEC_CONST (type))
2853 fprintf (of, "const-");
2854 if (SPEC_USIGN (type))
2855 fprintf (of, "unsigned-");
2856 switch (SPEC_NOUN (type))
2860 fprintf (of, "long-");
2861 fprintf (of, "int");
2865 fprintf (of, "char");
2869 fprintf (of, "void");
2873 fprintf (of, "float");
2877 fprintf (of, "fixed16x16");
2881 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2885 fprintf (of, "sbit");
2889 fprintf (of, "bit");
2893 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2897 fprintf (of, "double");
2901 fprintf (of, "unknown type");
2905 /* search entry in list before "type" */
2906 for (search = start; search && search->next != type;)
2907 search = search->next;
2916 /*--------------------------------------------------------------------*/
2917 /* printTypeChainRaw - prints the type chain in human readable form */
2918 /* in the raw data structure ordering */
2919 /*--------------------------------------------------------------------*/
2921 printTypeChainRaw (sym_link * start, FILE * of)
2934 fprintf (of, "void");
2944 if (!IS_FUNC(type)) {
2945 if (DCL_PTR_VOLATILE (type)) {
2946 fprintf (of, "volatile-");
2948 if (DCL_PTR_CONST (type)) {
2949 fprintf (of, "const-");
2952 switch (DCL_TYPE (type))
2955 fprintf (of, "function %s %s",
2956 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2957 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2959 for (args = FUNC_ARGS(type);
2962 printTypeChain(args->type, of);
2969 fprintf (of, "generic* ");
2972 fprintf (of, "code* ");
2975 fprintf (of, "xdata* ");
2978 fprintf (of, "eeprom* ");
2981 fprintf (of, "near* ");
2984 fprintf (of, "idata* ");
2987 fprintf (of, "pdata* ");
2990 fprintf (of, "unknown* ");
2993 if (DCL_ELEM(type)) {
2994 fprintf (of, "[%d] ", DCL_ELEM(type));
2996 fprintf (of, "[] ");
3000 if (DCL_TSPEC(type))
3003 printTypeChainRaw(DCL_TSPEC(type), of);
3007 else if (IS_SPEC (type))
3009 switch (SPEC_SCLS (type))
3011 case S_DATA: fprintf (of, "data-"); break;
3012 case S_XDATA: fprintf (of, "xdata-"); break;
3013 case S_SFR: fprintf (of, "sfr-"); break;
3014 case S_SBIT: fprintf (of, "sbit-"); break;
3015 case S_CODE: fprintf (of, "code-"); break;
3016 case S_IDATA: fprintf (of, "idata-"); break;
3017 case S_PDATA: fprintf (of, "pdata-"); break;
3018 case S_LITERAL: fprintf (of, "literal-"); break;
3019 case S_STACK: fprintf (of, "stack-"); break;
3020 case S_XSTACK: fprintf (of, "xstack-"); break;
3021 case S_BIT: fprintf (of, "bit-"); break;
3022 case S_EEPROM: fprintf (of, "eeprom-"); break;
3025 if (SPEC_VOLATILE (type))
3026 fprintf (of, "volatile-");
3027 if (SPEC_CONST (type))
3028 fprintf (of, "const-");
3029 if (SPEC_USIGN (type))
3030 fprintf (of, "unsigned-");
3031 switch (SPEC_NOUN (type))
3035 fprintf (of, "long-");
3036 fprintf (of, "int");
3040 fprintf (of, "char");
3044 fprintf (of, "void");
3048 fprintf (of, "float");
3052 fprintf (of, "fixed16x16");
3056 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
3060 fprintf (of, "sbit");
3064 fprintf (of, "bit");
3068 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
3072 fprintf (of, "double");
3076 fprintf (of, "unknown type");
3081 fprintf (of, "NOT_SPEC_OR_DECL");
3091 /*-----------------------------------------------------------------*/
3092 /* powof2 - returns power of two for the number if number is pow 2 */
3093 /*-----------------------------------------------------------------*/
3095 powof2 (TYPE_UDWORD num)
3108 if (n1s > 1 || nshifts == 0)
3124 symbol *__fps16x16_add;
3125 symbol *__fps16x16_sub;
3126 symbol *__fps16x16_mul;
3127 symbol *__fps16x16_div;
3128 symbol *__fps16x16_eq;
3129 symbol *__fps16x16_neq;
3130 symbol *__fps16x16_lt;
3131 symbol *__fps16x16_lteq;
3132 symbol *__fps16x16_gt;
3133 symbol *__fps16x16_gteq;
3135 /* Dims: mul/div/mod, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
3136 symbol *__muldiv[3][3][2];
3137 /* Dims: BYTE/WORD/DWORD SIGNED/UNSIGNED */
3138 sym_link *__multypes[3][2];
3139 /* Dims: to/from float, BYTE/WORD/DWORD, SIGNED/USIGNED */
3140 symbol *__conv[2][3][2];
3141 /* Dims: to/from fixed16x16, BYTE/WORD/DWORD/FLOAT, SIGNED/USIGNED */
3142 symbol *__fp16x16conv[2][4][2];
3143 /* Dims: shift left/shift right, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
3144 symbol *__rlrr[2][3][2];
3146 sym_link *floatType;
3147 sym_link *fixed16x16Type;
3150 _mangleFunctionName(char *in)
3152 if (port->getMangledFunctionName)
3154 return port->getMangledFunctionName(in);
3162 /*-----------------------------------------------------------------*/
3163 /* typeFromStr - create a typechain from an encoded string */
3164 /* basic types - 'c' - char */
3169 /* 'q' - fixed16x16 */
3171 /* '*' - pointer - default (GPOINTER) */
3172 /* modifiers - 'u' - unsigned */
3173 /* pointer modifiers - 'g' - generic */
3177 /* 'F' - function */
3178 /* examples : "ig*" - generic int * */
3179 /* "cx*" - char xdata * */
3180 /* "ui" - unsigned int */
3181 /*-----------------------------------------------------------------*/
3182 sym_link *typeFromStr (char *s)
3184 sym_link *r = newLink(DECLARATOR);
3196 r->class = SPECIFIER;
3197 SPEC_NOUN(r) = V_CHAR;
3201 r->class = SPECIFIER;
3202 SPEC_NOUN(r) = V_INT;
3205 r->class = SPECIFIER;
3206 SPEC_NOUN(r) = V_INT;
3210 r->class = SPECIFIER;
3211 SPEC_NOUN(r) = V_FLOAT;
3214 r->class = SPECIFIER;
3215 SPEC_NOUN(r) = V_FIXED16X16;
3218 r->class = SPECIFIER;
3219 SPEC_NOUN(r) = V_VOID;
3222 DCL_TYPE(r) = port->unqualified_pointer;
3229 assert(*(s+1)=='*');
3230 nr = newLink(DECLARATOR);
3235 DCL_TYPE(r) = GPOINTER;
3238 DCL_TYPE(r) = FPOINTER;
3241 DCL_TYPE(r) = CPOINTER;
3244 DCL_TYPE(r) = POINTER;
3247 DCL_TYPE(r) = FUNCTION;
3248 nr = newLink(DECLARATOR);
3251 DCL_TYPE(r) = CPOINTER;
3257 werror(E_INTERNAL_ERROR, __FILE__, __LINE__,
3258 "typeFromStr: unknown type");
3261 if (IS_SPEC(r) && usign) {
3270 /*-----------------------------------------------------------------*/
3271 /* initCSupport - create functions for C support routines */
3272 /*-----------------------------------------------------------------*/
3276 const char *smuldivmod[] =
3280 const char *sbwd[] =
3282 "char", "int", "long", "fixed16x16",
3284 const char *fp16x16sbwd[] =
3286 "char", "int", "long", "float",
3292 const char *srlrr[] =
3297 int bwd, su, muldivmod, tofrom, rlrr;
3299 if (getenv("SDCC_NO_C_SUPPORT")) {
3300 /* for debugging only */
3304 floatType = newFloatLink ();
3305 fixed16x16Type = newFixed16x16Link ();
3307 for (bwd = 0; bwd < 3; bwd++)
3324 __multypes[bwd][0] = l;
3325 __multypes[bwd][1] = copyLinkChain (l);
3326 SPEC_USIGN (__multypes[bwd][1]) = 1;
3329 __fsadd = funcOfType ("__fsadd", floatType, floatType, 2, options.float_rent);
3330 __fssub = funcOfType ("__fssub", floatType, floatType, 2, options.float_rent);
3331 __fsmul = funcOfType ("__fsmul", floatType, floatType, 2, options.float_rent);
3332 __fsdiv = funcOfType ("__fsdiv", floatType, floatType, 2, options.float_rent);
3333 __fseq = funcOfType ("__fseq", CHARTYPE, floatType, 2, options.float_rent);
3334 __fsneq = funcOfType ("__fsneq", CHARTYPE, floatType, 2, options.float_rent);
3335 __fslt = funcOfType ("__fslt", CHARTYPE, floatType, 2, options.float_rent);
3336 __fslteq = funcOfType ("__fslteq", CHARTYPE, floatType, 2, options.float_rent);
3337 __fsgt = funcOfType ("__fsgt", CHARTYPE, floatType, 2, options.float_rent);
3338 __fsgteq = funcOfType ("__fsgteq", CHARTYPE, floatType, 2, options.float_rent);
3340 __fps16x16_add = funcOfType ("__fps16x16_add", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3341 __fps16x16_sub = funcOfType ("__fps16x16_sub", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3342 __fps16x16_mul = funcOfType ("__fps16x16_mul", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3343 __fps16x16_div = funcOfType ("__fps16x16_div", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3344 __fps16x16_eq = funcOfType ("__fps16x16_eq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3345 __fps16x16_neq = funcOfType ("__fps16x16_neq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3346 __fps16x16_lt = funcOfType ("__fps16x16_lt", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3347 __fps16x16_lteq = funcOfType ("__fps16x16_lteq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3348 __fps16x16_gt = funcOfType ("__fps16x16_gt", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3349 __fps16x16_gteq = funcOfType ("__fps16x16_gteq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3352 for (tofrom = 0; tofrom < 2; tofrom++)
3354 for (bwd = 0; bwd < 3; bwd++)
3356 for (su = 0; su < 2; su++)
3360 SNPRINTF (buffer, sizeof(buffer), "__fs2%s%s", ssu[su], sbwd[bwd]);
3361 __conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], floatType, 1, options.float_rent);
3365 SNPRINTF (buffer, sizeof(buffer), "__%s%s2fs", ssu[su], sbwd[bwd]);
3366 __conv[tofrom][bwd][su] = funcOfType (buffer, floatType, __multypes[bwd][su], 1, options.float_rent);
3372 for (tofrom = 0; tofrom < 2; tofrom++)
3374 for (bwd = 0; bwd < 4; bwd++)
3376 for (su = 0; su < 2; su++)
3380 SNPRINTF (buffer, sizeof(buffer), "__fps16x162%s%s", ssu[su], fp16x16sbwd[bwd]);
3382 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, floatType, fixed16x16Type, 1, options.float_rent);
3384 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], fixed16x16Type, 1, options.float_rent);
3388 SNPRINTF (buffer, sizeof(buffer), "__%s%s2fps16x16", ssu[su], fp16x16sbwd[bwd]);
3390 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, fixed16x16Type, floatType, 1, options.float_rent);
3392 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, fixed16x16Type, __multypes[bwd][su], 1, options.float_rent);
3399 for (muldivmod = 0; muldivmod < 3; muldivmod++)
3401 for (bwd = 0; bwd < 3; bwd++)
3403 for (su = 0; su < 2; su++)
3405 SNPRINTF (buffer, sizeof(buffer),
3407 smuldivmod[muldivmod],
3410 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3411 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3416 muluint() and mulsint() resp. mululong() and mulslong() return the same result.
3417 Therefore they've been merged into mulint() and mullong().
3420 for (bwd = 0; bwd < 3; bwd++)
3422 for (su = 0; su < 2; su++)
3424 for (muldivmod = 1; muldivmod < 3; muldivmod++)
3427 SNPRINTF (buffer, sizeof(buffer),
3429 smuldivmod[muldivmod],
3432 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3433 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3441 for (su = 0; su < 2; su++)
3443 /* muluchar and mulschar are still separate functions, because e.g. the z80
3444 port is sign/zero-extending to int before calling mulint() */
3445 SNPRINTF (buffer, sizeof(buffer),
3447 smuldivmod[muldivmod],
3450 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3451 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3455 /* word and doubleword */
3456 for (bwd = 1; bwd < 3; bwd++)
3459 SNPRINTF (buffer, sizeof(buffer),
3461 smuldivmod[muldivmod],
3463 __muldiv[muldivmod][bwd][0] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3464 FUNC_NONBANKED (__muldiv[muldivmod][bwd][0]->type) = 1;
3465 /* signed = unsigned */
3466 __muldiv[muldivmod][bwd][1] = __muldiv[muldivmod][bwd][0];
3469 for (rlrr = 0; rlrr < 2; rlrr++)
3471 for (bwd = 0; bwd < 3; bwd++)
3473 for (su = 0; su < 2; su++)
3475 SNPRINTF (buffer, sizeof(buffer),
3480 __rlrr[rlrr][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[0][0], 2, options.intlong_rent);
3481 FUNC_NONBANKED (__rlrr[rlrr][bwd][su]->type) = 1;
3487 /*-----------------------------------------------------------------*/
3488 /* initBuiltIns - create prototypes for builtin functions */
3489 /*-----------------------------------------------------------------*/
3495 if (!port->builtintable) return ;
3497 for (i = 0 ; port->builtintable[i].name ; i++) {
3498 sym = funcOfTypeVarg(port->builtintable[i].name,port->builtintable[i].rtype,
3499 port->builtintable[i].nParms,port->builtintable[i].parm_types);
3500 FUNC_ISBUILTIN(sym->type) = 1;
3501 FUNC_ISREENT(sym->type) = 0; /* can never be reentrant */
3505 sym_link *validateLink(sym_link *l,
3512 if (l && l->class==select)
3517 "Internal error: validateLink failed in %s(%s) @ %s:%u:"
3518 " expected %s, got %s\n",
3519 macro, args, file, line,
3520 DECLSPEC2TXT(select), l ? DECLSPEC2TXT(l->class) : "null-link");
3522 return l; // never reached, makes compiler happy.
3525 /*--------------------------------------------------------------------*/
3526 /* newEnumType - create an integer type compatible with enumerations */
3527 /*--------------------------------------------------------------------*/
3529 newEnumType (symbol *enumlist)
3537 type = newLink (SPECIFIER);
3538 SPEC_NOUN (type) = V_INT;
3542 /* Determine the range of the enumerated values */
3544 min = max = (int) floatFromVal (valFromType (sym->type));
3545 for (sym = sym->next; sym; sym = sym->next)
3547 v = (int) floatFromVal (valFromType (sym->type));
3554 /* Determine the smallest integer type that is compatible with this range */
3555 type = newLink (SPECIFIER);
3556 if (min>=0 && max<=255)
3558 SPEC_NOUN (type) = V_CHAR;
3559 SPEC_USIGN (type) = 1;
3561 else if (min>=-128 && max<=127)
3563 SPEC_NOUN (type) = V_CHAR;
3565 else if (min>=0 && max<=65535)
3567 SPEC_NOUN (type) = V_INT;
3568 SPEC_USIGN (type) = 1;
3570 else if (min>=-32768 && max<=32767)
3572 SPEC_NOUN (type) = V_INT;
3576 SPEC_NOUN (type) = V_INT;
3577 SPEC_LONG (type) = 1;
3579 SPEC_USIGN (type) = 1;