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 /* promotion of some special cases */
1888 return computeTypeOr (etype1, etype2, reType);
1890 if (SPEC_USIGN (etype1) != SPEC_USIGN (etype2))
1892 SPEC_USIGN (reType) = 1;
1897 SPEC_NOUN (reType) = V_INT;
1898 SPEC_USIGN (reType) = 0;
1901 /* if both are unsigned char then no promotion required */
1902 if (!(SPEC_USIGN (etype1) && SPEC_USIGN (etype2)))
1904 SPEC_NOUN (reType) = V_INT;
1905 SPEC_USIGN (reType) = 0;
1918 /* SDCC's sign promotion:
1919 - if one or both operands are unsigned, the resultant type will be unsigned
1920 (except char, see below)
1921 - if an operand is promoted to a larger type (char -> int, int -> long),
1922 the larger type will be signed
1924 SDCC tries hard to avoid promotion to int and does 8 bit calculation as
1925 much as possible. We're leaving ISO IEC 9899 here and have to extrapolate
1926 the standard. The standard demands, that the result has to be the same
1927 "as if" the promotion would have been performed:
1929 - if the result of an operation with two char's is promoted to a
1930 larger type, the result will be signed.
1932 More sophisticated are these:
1933 - if the result of an operation with two char's is a char again,
1934 the result will only then be unsigned, if both operands are
1935 unsigned. In all other cases the result will be signed.
1937 This seems to be contradictionary to the first two rules, but it makes
1938 real sense (all types are char's):
1940 A signed char can be negative; this must be preserved in the result
1943 Only if both operands are unsigned it's safe to make the result
1944 unsigned; this helps to avoid overflow:
1947 - ToDo: document '|', '^' and '&'
1949 Homework: - why is (200 * 200 < 0) true?
1950 - why is { char l = 200, r = 200; (r * l > 0) } true?
1953 if (!IS_FLOAT (reType)
1954 && ( (SPEC_USIGN (etype1)
1955 /* if this operand is promoted to a larger type,
1956 then it will be promoted to a signed type */
1957 && !(getSize (etype1) < getSize (reType))
1958 /* char require special handling */
1959 && !IS_CHAR (etype1))
1960 || /* same for 2nd operand */
1961 (SPEC_USIGN (etype2)
1962 && !(getSize (etype2) < getSize (reType))
1963 && !IS_CHAR (etype2))
1964 || /* if both are 'unsigned char' and not promoted
1965 let the result be unsigned too */
1966 ( SPEC_USIGN (etype1)
1967 && SPEC_USIGN (etype2)
1970 && IS_CHAR (reType))))
1971 SPEC_USIGN (reType) = 1;
1973 SPEC_USIGN (reType) = 0;
1978 /*--------------------------------------------------------------------*/
1979 /* compareType - will do type check return 1 if match, -1 if castable */
1980 /*--------------------------------------------------------------------*/
1982 compareType (sym_link * dest, sym_link * src)
1993 /* if dest is a declarator then */
1998 /* banked function pointer */
1999 if (IS_GENPTR (dest) && IS_GENPTR (src))
2001 if (IS_FUNC (src->next) && IS_VOID(dest->next))
2003 if (IS_FUNC (dest->next) && IS_VOID(src->next))
2005 return compareType (dest->next, src->next);
2008 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
2010 //checkFunction(src,dest);
2012 return compareType (dest->next, src->next);
2014 if (IS_PTR (dest) && IS_GENPTR (src) && IS_VOID(src->next)) {
2018 (IS_GENPTR (dest) ||
2019 ((DCL_TYPE(src) == POINTER) && (DCL_TYPE(dest) == IPOINTER))
2022 if (IS_PTR (dest) && IS_ARRAY (src)) {
2023 value *val=aggregateToPointer (valFromType(src));
2024 int res=compareType (dest, val->type);
2025 Safe_free(val->type);
2029 if (IS_PTR (dest) && IS_FUNC (dest->next) && IS_FUNC (src))
2030 return compareType (dest->next, src);
2033 else if (IS_PTR (dest) && IS_INTEGRAL (src))
2039 /* if one is a specifier and the other is not */
2040 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
2041 (IS_SPEC (dest) && !IS_SPEC (src)))
2044 /* if one of them is a void then ok */
2045 if (SPEC_NOUN (dest) == V_VOID &&
2046 SPEC_NOUN (src) != V_VOID)
2049 if (SPEC_NOUN (dest) != V_VOID &&
2050 SPEC_NOUN (src) == V_VOID)
2053 /* if they are both bitfields then if the lengths
2054 and starts don't match */
2055 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
2056 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
2057 SPEC_BSTR (dest) != SPEC_BSTR (src)))
2060 /* it is a specifier */
2061 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
2063 if (SPEC_USIGN (dest) == SPEC_USIGN (src) &&
2064 IS_INTEGRAL (dest) && IS_INTEGRAL (src) &&
2066 bitsForType (dest) == bitsForType (src))
2067 instead of the next two lines, but the regression tests fail with
2068 them; I guess it's a problem with replaceCheaperOp */
2069 getSize (dest) == getSize (src) &&
2070 !(!IS_BIT (dest) && IS_BIT (src)))
2072 else if (IS_ARITHMETIC (dest) && IS_ARITHMETIC (src))
2077 else if (IS_STRUCT (dest))
2079 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
2084 if (SPEC_LONG (dest) != SPEC_LONG (src))
2087 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
2093 /*--------------------------------------------------------------------*/
2094 /* compareTypeExact - will do type check return 1 if match exactly */
2095 /*--------------------------------------------------------------------*/
2097 compareTypeExact (sym_link * dest, sym_link * src, int level)
2099 STORAGE_CLASS srcScls, destScls;
2110 /* if dest is a declarator then */
2115 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
2116 if ((DCL_TYPE (src) == ARRAY) && (DCL_ELEM (src) != DCL_ELEM (dest)))
2118 if (DCL_PTR_CONST (src) != DCL_PTR_CONST (dest))
2120 if (DCL_PTR_VOLATILE (src) != DCL_PTR_VOLATILE (dest))
2124 value *exargs, *acargs, *checkValue;
2126 /* verify function return type */
2127 if (!compareTypeExact (dest->next, src->next, -1))
2129 if (FUNC_ISISR (dest) != FUNC_ISISR (src))
2131 if (FUNC_REGBANK (dest) != FUNC_REGBANK (src))
2133 if (IFFUNC_ISNAKED (dest) != IFFUNC_ISNAKED (src))
2136 if (IFFUNC_ISREENT (dest) != IFFUNC_ISREENT (src) && argCnt>1)
2140 /* compare expected args with actual args */
2141 exargs = FUNC_ARGS(dest);
2142 acargs = FUNC_ARGS(src);
2144 /* for all the expected args do */
2145 for (; exargs && acargs; exargs = exargs->next, acargs = acargs->next)
2147 //checkTypeSanity(acargs->etype, acargs->name);
2149 if (IS_AGGREGATE (acargs->type))
2151 checkValue = copyValue (acargs);
2152 aggregateToPointer (checkValue);
2155 checkValue = acargs;
2158 if (!compareTypeExact (exargs->type, checkValue->type, -1))
2163 /* if one them ended we have a problem */
2164 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2165 (!exargs && acargs && !IS_VOID (acargs->type)))
2169 return compareTypeExact (dest->next, src->next, level);
2176 /* if one is a specifier and the other is not */
2177 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
2178 (IS_SPEC (dest) && !IS_SPEC (src)))
2181 /* if one of them is a void then ok */
2182 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
2185 /* if they are both bitfields then if the lengths
2186 and starts don't match */
2187 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
2188 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
2189 SPEC_BSTR (dest) != SPEC_BSTR (src)))
2192 if (IS_INTEGRAL (dest))
2194 /* signedness must match */
2195 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
2197 /* size must match */
2198 if (SPEC_LONG (dest) != SPEC_LONG (src))
2200 if (SPEC_SHORT (dest) != SPEC_SHORT (src))
2204 if (IS_STRUCT (dest))
2206 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
2210 if (SPEC_CONST (dest) != SPEC_CONST (src))
2212 if (SPEC_VOLATILE (dest) != SPEC_VOLATILE (src))
2214 if (SPEC_STAT (dest) != SPEC_STAT (src))
2216 if (SPEC_ABSA (dest) != SPEC_ABSA (src))
2218 if (SPEC_ABSA (dest) && SPEC_ADDR (dest) != SPEC_ADDR (src))
2221 destScls = SPEC_SCLS (dest);
2222 srcScls = SPEC_SCLS (src);
2224 /* Compensate for const to const code change in checkSClass() */
2225 if (!level & port->mem.code_ro && SPEC_CONST (dest))
2227 if (srcScls == S_CODE && destScls == S_FIXED)
2229 if (destScls == S_CODE && srcScls == S_FIXED)
2233 /* compensate for allocGlobal() */
2234 if ((srcScls == S_FIXED || srcScls == S_AUTO)
2235 && port->mem.default_globl_map == xdata
2239 if (level>0 && !SPEC_STAT (dest))
2241 /* Compensate for hack-o-matic in checkSClass() */
2242 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
2244 if (destScls == S_FIXED)
2245 destScls = (options.useXstack ? S_XSTACK : S_STACK);
2246 if (srcScls == S_FIXED)
2247 srcScls = (options.useXstack ? S_XSTACK : S_STACK);
2249 else if (TARGET_IS_DS390 || TARGET_IS_DS400 || options.useXstack)
2251 if (destScls == S_FIXED)
2253 if (srcScls == S_FIXED)
2258 if (srcScls != destScls)
2261 printf ("level = %d\n", level);
2262 printf ("SPEC_SCLS (src) = %d, SPEC_SCLS (dest) = %d\n",
2263 SPEC_SCLS (src), SPEC_SCLS (dest));
2264 printf ("srcScls = %d, destScls = %d\n",srcScls, destScls);
2272 /*------------------------------------------------------------------*/
2273 /* inCalleeSaveList - return 1 if found in callee save list */
2274 /*------------------------------------------------------------------*/
2276 calleeCmp(void *p1, void *p2)
2278 return (strcmp((char *)p1, (char *)(p2)) == 0);
2282 inCalleeSaveList(char *s)
2284 if (options.all_callee_saves)
2286 return isinSetWith(options.calleeSavesSet, s, calleeCmp);
2289 /*-----------------------------------------------------------------*/
2290 /* aggregateToPointer: change an agggregate type function */
2291 /* argument to a pointer to that type. */
2292 /*-----------------------------------------------------------------*/
2294 aggregateToPointer (value * val)
2296 if (IS_AGGREGATE (val->type))
2298 /* if this is a structure */
2299 /* then we need to add a new link */
2300 if (IS_STRUCT (val->type))
2302 /* first lets add DECLARATOR type */
2303 sym_link *p = val->type;
2305 werror (W_STRUCT_AS_ARG, val->name);
2306 val->type = newLink (DECLARATOR);
2307 val->type->next = p;
2310 /* change to a pointer depending on the */
2311 /* storage class specified */
2312 switch (SPEC_SCLS (val->etype))
2315 DCL_TYPE (val->type) = IPOINTER;
2318 DCL_TYPE (val->type) = PPOINTER;
2321 if (SPEC_OCLS(val->etype)) {
2322 DCL_TYPE(val->type)=PTR_TYPE(SPEC_OCLS(val->etype));
2324 // this happens for (external) function parameters
2325 DCL_TYPE (val->type) = port->unqualified_pointer;
2331 DCL_TYPE (val->type) = POINTER;
2334 DCL_TYPE (val->type) = CPOINTER;
2337 DCL_TYPE (val->type) = FPOINTER;
2340 DCL_TYPE (val->type) = EEPPOINTER;
2343 DCL_TYPE (val->type) = port->unqualified_pointer;
2346 /* is there is a symbol associated then */
2347 /* change the type of the symbol as well */
2350 val->sym->type = copyLinkChain (val->type);
2351 val->sym->etype = getSpec (val->sym->type);
2356 /*------------------------------------------------------------------*/
2357 /* checkFunction - does all kinds of check on a function */
2358 /*------------------------------------------------------------------*/
2360 checkFunction (symbol * sym, symbol *csym)
2362 value *exargs, *acargs;
2366 if (getenv("DEBUG_SANITY")) {
2367 fprintf (stderr, "checkFunction: %s ", sym->name);
2370 if (!IS_DECL(sym->type) || DCL_TYPE(sym->type)!=FUNCTION)
2372 werror(E_SYNTAX_ERROR, sym->name);
2376 /* make sure the type is complete and sane */
2377 checkTypeSanity(((symbol *)sym)->etype, ((symbol *)sym)->name);
2379 /* if not type then some kind of error */
2383 /* if the function has no type then make it return int */
2384 if (!sym->type->next)
2385 sym->type->next = sym->etype = newIntLink ();
2387 /* function cannot return aggregate */
2388 if (IS_AGGREGATE (sym->type->next))
2390 werror (E_FUNC_AGGR, sym->name);
2394 /* check if this function is defined as calleeSaves
2395 then mark it as such */
2396 FUNC_CALLEESAVES(sym->type) = inCalleeSaveList (sym->name);
2398 /* if interrupt service routine */
2399 /* then it cannot have arguments */
2400 if (IFFUNC_ARGS(sym->type) && FUNC_ISISR (sym->type))
2402 if (!IS_VOID(FUNC_ARGS(sym->type)->type)) {
2403 werror (E_INT_ARGS, sym->name);
2404 FUNC_ARGS(sym->type)=NULL;
2408 if (IFFUNC_ISSHADOWREGS(sym->type) && !FUNC_ISISR (sym->type))
2410 werror (E_SHADOWREGS_NO_ISR, sym->name);
2414 for (argCnt=1, acargs = FUNC_ARGS(sym->type);
2416 acargs=acargs->next, argCnt++) {
2418 // this can happen for reentrant functions
2419 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2420 // the show must go on: synthesize a name and symbol
2421 SNPRINTF (acargs->name, sizeof(acargs->name), "_%s_PARM_%d", sym->name, argCnt);
2422 acargs->sym = newSymbol (acargs->name, 1);
2423 SPEC_OCLS (acargs->etype) = istack;
2424 acargs->sym->type = copyLinkChain (acargs->type);
2425 acargs->sym->etype = getSpec (acargs->sym->type);
2426 acargs->sym->_isparm = 1;
2427 strncpyz (acargs->sym->rname, acargs->name, sizeof(acargs->sym->rname));
2428 } else if (strcmp(acargs->sym->name, acargs->sym->rname)==0) {
2430 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2435 if (!csym && !(csym = findSym (SymbolTab, sym, sym->name)))
2436 return 1; /* not defined nothing more to check */
2438 /* check if body already present */
2439 if (csym && IFFUNC_HASBODY(csym->type))
2441 werror (E_FUNC_BODY, sym->name);
2445 /* check the return value type */
2446 if (compareType (csym->type, sym->type) <= 0)
2448 werror (E_PREV_DEF_CONFLICT, csym->name, "type");
2449 printFromToType(csym->type, sym->type);
2453 if (FUNC_ISISR (csym->type) != FUNC_ISISR (sym->type))
2455 werror (E_PREV_DEF_CONFLICT, csym->name, "interrupt");
2458 /* I don't think this is necessary for interrupts. An isr is a */
2459 /* root in the calling tree. */
2460 if ((FUNC_REGBANK (csym->type) != FUNC_REGBANK (sym->type)) &&
2461 (!FUNC_ISISR (sym->type)))
2463 werror (E_PREV_DEF_CONFLICT, csym->name, "using");
2466 if (IFFUNC_ISNAKED (csym->type) != IFFUNC_ISNAKED (sym->type))
2468 werror (E_PREV_DEF_CONFLICT, csym->name, "_naked");
2471 /* Really, reentrant should match regardless of argCnt, but */
2472 /* this breaks some existing code (the fp lib functions). If */
2473 /* the first argument is always passed the same way, this */
2474 /* lax checking is ok (but may not be true for in future ports) */
2475 if (IFFUNC_ISREENT (csym->type) != IFFUNC_ISREENT (sym->type)
2478 //printf("argCnt = %d\n",argCnt);
2479 werror (E_PREV_DEF_CONFLICT, csym->name, "reentrant");
2482 if (IFFUNC_ISWPARAM (csym->type) != IFFUNC_ISWPARAM (sym->type))
2484 werror (E_PREV_DEF_CONFLICT, csym->name, "wparam");
2487 if (IFFUNC_ISSHADOWREGS (csym->type) != IFFUNC_ISSHADOWREGS (sym->type))
2489 werror (E_PREV_DEF_CONFLICT, csym->name, "shadowregs");
2493 /* compare expected args with actual args */
2494 exargs = FUNC_ARGS(csym->type);
2495 acargs = FUNC_ARGS(sym->type);
2497 /* for all the expected args do */
2500 exargs = exargs->next, acargs = acargs->next, argCnt++)
2502 if (getenv("DEBUG_SANITY")) {
2503 fprintf (stderr, "checkFunction: %s ", exargs->name);
2505 /* make sure the type is complete and sane */
2506 checkTypeSanity(exargs->etype, exargs->name);
2508 /* If the actual argument is an array, any prototype
2509 * will have modified it to a pointer. Duplicate that
2512 if (IS_AGGREGATE (acargs->type))
2514 checkValue = copyValue (acargs);
2515 aggregateToPointer (checkValue);
2519 checkValue = acargs;
2522 if (compareType (exargs->type, checkValue->type) <= 0)
2524 werror (E_ARG_TYPE, argCnt);
2525 printFromToType(exargs->type, checkValue->type);
2530 /* if one them ended we have a problem */
2531 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2532 (!exargs && acargs && !IS_VOID (acargs->type)))
2533 werror (E_ARG_COUNT);
2535 /* replace with this defition */
2536 sym->cdef = csym->cdef;
2537 deleteSym (SymbolTab, csym, csym->name);
2538 deleteFromSeg(csym);
2539 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
2540 if (IS_EXTERN (csym->etype) && !
2541 IS_EXTERN (sym->etype))
2543 addSet (&publics, sym);
2548 /*------------------------------------------------------------------*/
2549 /* cdbStructBlock - calls struct printing for a blcks */
2550 /*------------------------------------------------------------------*/
2551 void cdbStructBlock (int block)
2554 bucket **table = StructTab;
2557 /* go thru the entire table */
2558 for (i = 0; i < 256; i++)
2560 for (chain = table[i]; chain; chain = chain->next)
2562 if (chain->block >= block)
2565 debugFile->writeType((structdef *)chain->sym, chain->block, 0, NULL);
2571 /*-----------------------------------------------------------------*/
2572 /* processFuncArgs - does some processing with function args */
2573 /*-----------------------------------------------------------------*/
2575 processFuncArgs (symbol * func)
2579 sym_link *funcType=func->type;
2581 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
2582 fprintf (stderr, "SDCCsymt.c:processFuncArgs(%s)\n", func->name);
2584 /* find the function declaration within the type */
2585 while (funcType && !IS_FUNC(funcType))
2586 funcType=funcType->next;
2588 /* if this function has variable argument list */
2589 /* then make the function a reentrant one */
2590 if (IFFUNC_HASVARARGS(funcType) || (options.stackAuto && !func->cdef))
2591 FUNC_ISREENT(funcType)=1;
2593 /* check if this function is defined as calleeSaves
2594 then mark it as such */
2595 FUNC_CALLEESAVES(funcType) = inCalleeSaveList (func->name);
2597 /* loop thru all the arguments */
2598 val = FUNC_ARGS(funcType);
2600 /* if it is void then remove parameters */
2601 if (val && IS_VOID (val->type))
2603 FUNC_ARGS(funcType) = NULL;
2607 /* reset regparm for the port */
2608 (*port->reset_regparms) ();
2610 /* if any of the arguments is an aggregate */
2611 /* change it to pointer to the same type */
2615 char buffer[SDCC_NAME_MAX+1];
2617 SNPRINTF (buffer, sizeof(buffer), "%s parameter %d", func->name, pNum);
2618 checkTypeSanity (val->etype, buffer);
2620 /* mark it as a register parameter if
2621 the function does not have VA_ARG
2622 and as port dictates */
2623 if (!IFFUNC_HASVARARGS(funcType) &&
2624 (argreg = (*port->reg_parm) (val->type, FUNC_ISREENT(funcType))))
2626 SPEC_REGPARM (val->etype) = 1;
2627 SPEC_ARGREG(val->etype) = argreg;
2628 } else if (IFFUNC_ISREENT(funcType)) {
2629 FUNC_HASSTACKPARM(funcType) = 1;
2632 if (IS_AGGREGATE (val->type))
2634 aggregateToPointer (val);
2641 /* if this is an internal generated function call */
2643 /* ignore --stack-auto for this one, we don't know how it is compiled */
2644 /* simply trust on --int-long-reent or --float-reent */
2645 if (IFFUNC_ISREENT(funcType)) {
2649 /* if this function is reentrant or */
2650 /* automatics r 2b stacked then nothing */
2651 if (IFFUNC_ISREENT (funcType) || options.stackAuto)
2655 val = FUNC_ARGS(funcType);
2660 /* if a symbolname is not given */
2661 /* synthesize a variable name */
2664 SNPRINTF (val->name, sizeof(val->name),
2665 "_%s_PARM_%d", func->name, pNum++);
2666 val->sym = newSymbol (val->name, 1);
2667 if (SPEC_SCLS(val->etype) == S_BIT)
2668 SPEC_OCLS (val->etype) = bit;
2670 SPEC_OCLS (val->etype) = port->mem.default_local_map;
2671 val->sym->type = copyLinkChain (val->type);
2672 val->sym->etype = getSpec (val->sym->type);
2673 val->sym->_isparm = 1;
2674 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2676 /* ?? static functions shouldn't imply static parameters - EEP */
2677 if (IS_SPEC(func->etype)) {
2678 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2679 SPEC_STAT (func->etype);
2682 addSymChain (&val->sym);
2685 else /* symbol name given create synth name */
2688 SNPRINTF (val->name, sizeof(val->name), "_%s_PARM_%d", func->name, pNum++);
2689 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2690 val->sym->_isparm = 1;
2691 if (SPEC_SCLS(val->etype) == S_BIT)
2692 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) = bit;
2694 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) =
2695 port->mem.default_local_map;
2698 /* ?? static functions shouldn't imply static parameters - EEP */
2699 if (IS_SPEC(func->etype)) {
2700 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2701 SPEC_STAT (func->etype);
2705 if (SPEC_OCLS (val->sym->etype) == pdata)
2706 val->sym->iaccess = 1;
2707 if (!isinSet(operKeyReset, val->sym)) {
2708 addSet (&operKeyReset, val->sym);
2709 applyToSet (operKeyReset, resetParmKey);
2715 /*-----------------------------------------------------------------*/
2716 /* isSymbolEqual - compares two symbols return 1 if they match */
2717 /*-----------------------------------------------------------------*/
2719 isSymbolEqual (symbol * dest, symbol * src)
2721 /* if pointers match then equal */
2725 /* if one of them is null then don't match */
2729 /* if both of them have rname match on rname */
2730 if (dest->rname[0] && src->rname[0])
2731 return (!strcmp (dest->rname, src->rname));
2733 /* otherwise match on name */
2734 return (!strcmp (dest->name, src->name));
2737 void PT(sym_link *type)
2739 printTypeChain(type,0);
2741 /*-----------------------------------------------------------------*/
2742 /* printTypeChain - prints the type chain in human readable form */
2743 /*-----------------------------------------------------------------*/
2745 printTypeChain (sym_link * start, FILE * of)
2749 sym_link * type, * search;
2759 fprintf (of, "void");
2763 /* Print the chain as it is written in the source: */
2764 /* start with the last entry. */
2765 /* However, the storage class at the end of the */
2766 /* chain reall applies to the first in the chain! */
2768 for (type = start; type && type->next; type = type->next)
2771 scls=SPEC_SCLS(type);
2779 case S_DATA: fprintf (of, "data-"); break;
2780 case S_XDATA: fprintf (of, "xdata-"); break;
2781 case S_SFR: fprintf (of, "sfr-"); break;
2782 case S_SBIT: fprintf (of, "sbit-"); break;
2783 case S_CODE: fprintf (of, "code-"); break;
2784 case S_IDATA: fprintf (of, "idata-"); break;
2785 case S_PDATA: fprintf (of, "pdata-"); break;
2786 case S_LITERAL: fprintf (of, "literal-"); break;
2787 case S_STACK: fprintf (of, "stack-"); break;
2788 case S_XSTACK: fprintf (of, "xstack-"); break;
2789 case S_BIT: fprintf (of, "bit-"); break;
2790 case S_EEPROM: fprintf (of, "eeprom-"); break;
2797 if (!IS_FUNC(type)) {
2798 if (DCL_PTR_VOLATILE (type)) {
2799 fprintf (of, "volatile-");
2801 if (DCL_PTR_CONST (type)) {
2802 fprintf (of, "const-");
2805 switch (DCL_TYPE (type))
2808 fprintf (of, "function %s %s",
2809 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2810 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2812 for (args = FUNC_ARGS(type);
2815 printTypeChain(args->type, of);
2822 fprintf (of, "generic* ");
2825 fprintf (of, "code* ");
2828 fprintf (of, "xdata* ");
2831 fprintf (of, "eeprom* ");
2834 fprintf (of, "near* ");
2837 fprintf (of, "idata* ");
2840 fprintf (of, "pdata* ");
2843 fprintf (of, "unknown* ");
2846 if (DCL_ELEM(type)) {
2847 fprintf (of, "[%d] ", DCL_ELEM(type));
2849 fprintf (of, "[] ");
2856 if (SPEC_VOLATILE (type))
2857 fprintf (of, "volatile-");
2858 if (SPEC_CONST (type))
2859 fprintf (of, "const-");
2860 if (SPEC_USIGN (type))
2861 fprintf (of, "unsigned-");
2862 switch (SPEC_NOUN (type))
2866 fprintf (of, "long-");
2867 fprintf (of, "int");
2871 fprintf (of, "char");
2875 fprintf (of, "void");
2879 fprintf (of, "float");
2883 fprintf (of, "fixed16x16");
2887 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2891 fprintf (of, "sbit");
2895 fprintf (of, "bit");
2899 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2903 fprintf (of, "double");
2907 fprintf (of, "unknown type");
2911 /* search entry in list before "type" */
2912 for (search = start; search && search->next != type;)
2913 search = search->next;
2922 /*--------------------------------------------------------------------*/
2923 /* printTypeChainRaw - prints the type chain in human readable form */
2924 /* in the raw data structure ordering */
2925 /*--------------------------------------------------------------------*/
2927 printTypeChainRaw (sym_link * start, FILE * of)
2940 fprintf (of, "void");
2950 if (!IS_FUNC(type)) {
2951 if (DCL_PTR_VOLATILE (type)) {
2952 fprintf (of, "volatile-");
2954 if (DCL_PTR_CONST (type)) {
2955 fprintf (of, "const-");
2958 switch (DCL_TYPE (type))
2961 fprintf (of, "function %s %s",
2962 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2963 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2965 for (args = FUNC_ARGS(type);
2968 printTypeChain(args->type, of);
2975 fprintf (of, "generic* ");
2978 fprintf (of, "code* ");
2981 fprintf (of, "xdata* ");
2984 fprintf (of, "eeprom* ");
2987 fprintf (of, "near* ");
2990 fprintf (of, "idata* ");
2993 fprintf (of, "pdata* ");
2996 fprintf (of, "unknown* ");
2999 if (DCL_ELEM(type)) {
3000 fprintf (of, "[%d] ", DCL_ELEM(type));
3002 fprintf (of, "[] ");
3006 if (DCL_TSPEC(type))
3009 printTypeChainRaw(DCL_TSPEC(type), of);
3013 else if (IS_SPEC (type))
3015 switch (SPEC_SCLS (type))
3017 case S_DATA: fprintf (of, "data-"); break;
3018 case S_XDATA: fprintf (of, "xdata-"); break;
3019 case S_SFR: fprintf (of, "sfr-"); break;
3020 case S_SBIT: fprintf (of, "sbit-"); break;
3021 case S_CODE: fprintf (of, "code-"); break;
3022 case S_IDATA: fprintf (of, "idata-"); break;
3023 case S_PDATA: fprintf (of, "pdata-"); break;
3024 case S_LITERAL: fprintf (of, "literal-"); break;
3025 case S_STACK: fprintf (of, "stack-"); break;
3026 case S_XSTACK: fprintf (of, "xstack-"); break;
3027 case S_BIT: fprintf (of, "bit-"); break;
3028 case S_EEPROM: fprintf (of, "eeprom-"); break;
3031 if (SPEC_VOLATILE (type))
3032 fprintf (of, "volatile-");
3033 if (SPEC_CONST (type))
3034 fprintf (of, "const-");
3035 if (SPEC_USIGN (type))
3036 fprintf (of, "unsigned-");
3037 switch (SPEC_NOUN (type))
3041 fprintf (of, "long-");
3042 fprintf (of, "int");
3046 fprintf (of, "char");
3050 fprintf (of, "void");
3054 fprintf (of, "float");
3058 fprintf (of, "fixed16x16");
3062 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
3066 fprintf (of, "sbit");
3070 fprintf (of, "bit");
3074 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
3078 fprintf (of, "double");
3082 fprintf (of, "unknown type");
3087 fprintf (of, "NOT_SPEC_OR_DECL");
3097 /*-----------------------------------------------------------------*/
3098 /* powof2 - returns power of two for the number if number is pow 2 */
3099 /*-----------------------------------------------------------------*/
3101 powof2 (TYPE_UDWORD num)
3114 if (n1s > 1 || nshifts == 0)
3130 symbol *__fps16x16_add;
3131 symbol *__fps16x16_sub;
3132 symbol *__fps16x16_mul;
3133 symbol *__fps16x16_div;
3134 symbol *__fps16x16_eq;
3135 symbol *__fps16x16_neq;
3136 symbol *__fps16x16_lt;
3137 symbol *__fps16x16_lteq;
3138 symbol *__fps16x16_gt;
3139 symbol *__fps16x16_gteq;
3141 /* Dims: mul/div/mod, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
3142 symbol *__muldiv[3][3][2];
3143 /* Dims: BYTE/WORD/DWORD SIGNED/UNSIGNED */
3144 sym_link *__multypes[3][2];
3145 /* Dims: to/from float, BYTE/WORD/DWORD, SIGNED/USIGNED */
3146 symbol *__conv[2][3][2];
3147 /* Dims: to/from fixed16x16, BYTE/WORD/DWORD/FLOAT, SIGNED/USIGNED */
3148 symbol *__fp16x16conv[2][4][2];
3149 /* Dims: shift left/shift right, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
3150 symbol *__rlrr[2][3][2];
3152 sym_link *floatType;
3153 sym_link *fixed16x16Type;
3156 _mangleFunctionName(char *in)
3158 if (port->getMangledFunctionName)
3160 return port->getMangledFunctionName(in);
3168 /*-----------------------------------------------------------------*/
3169 /* typeFromStr - create a typechain from an encoded string */
3170 /* basic types - 'c' - char */
3175 /* 'q' - fixed16x16 */
3177 /* '*' - pointer - default (GPOINTER) */
3178 /* modifiers - 'u' - unsigned */
3179 /* pointer modifiers - 'g' - generic */
3183 /* 'F' - function */
3184 /* examples : "ig*" - generic int * */
3185 /* "cx*" - char xdata * */
3186 /* "ui" - unsigned int */
3187 /*-----------------------------------------------------------------*/
3188 sym_link *typeFromStr (char *s)
3190 sym_link *r = newLink(DECLARATOR);
3202 r->class = SPECIFIER;
3203 SPEC_NOUN(r) = V_CHAR;
3207 r->class = SPECIFIER;
3208 SPEC_NOUN(r) = V_INT;
3211 r->class = SPECIFIER;
3212 SPEC_NOUN(r) = V_INT;
3216 r->class = SPECIFIER;
3217 SPEC_NOUN(r) = V_FLOAT;
3220 r->class = SPECIFIER;
3221 SPEC_NOUN(r) = V_FIXED16X16;
3224 r->class = SPECIFIER;
3225 SPEC_NOUN(r) = V_VOID;
3228 DCL_TYPE(r) = port->unqualified_pointer;
3235 assert(*(s+1)=='*');
3236 nr = newLink(DECLARATOR);
3241 DCL_TYPE(r) = GPOINTER;
3244 DCL_TYPE(r) = FPOINTER;
3247 DCL_TYPE(r) = CPOINTER;
3250 DCL_TYPE(r) = POINTER;
3253 DCL_TYPE(r) = FUNCTION;
3254 nr = newLink(DECLARATOR);
3257 DCL_TYPE(r) = CPOINTER;
3263 werror(E_INTERNAL_ERROR, __FILE__, __LINE__,
3264 "typeFromStr: unknown type");
3267 if (IS_SPEC(r) && usign) {
3276 /*-----------------------------------------------------------------*/
3277 /* initCSupport - create functions for C support routines */
3278 /*-----------------------------------------------------------------*/
3282 const char *smuldivmod[] =
3286 const char *sbwd[] =
3288 "char", "int", "long", "fixed16x16",
3290 const char *fp16x16sbwd[] =
3292 "char", "int", "long", "float",
3298 const char *srlrr[] =
3303 int bwd, su, muldivmod, tofrom, rlrr;
3305 if (getenv("SDCC_NO_C_SUPPORT")) {
3306 /* for debugging only */
3310 floatType = newFloatLink ();
3311 fixed16x16Type = newFixed16x16Link ();
3313 for (bwd = 0; bwd < 3; bwd++)
3330 __multypes[bwd][0] = l;
3331 __multypes[bwd][1] = copyLinkChain (l);
3332 SPEC_USIGN (__multypes[bwd][1]) = 1;
3335 __fsadd = funcOfType ("__fsadd", floatType, floatType, 2, options.float_rent);
3336 __fssub = funcOfType ("__fssub", floatType, floatType, 2, options.float_rent);
3337 __fsmul = funcOfType ("__fsmul", floatType, floatType, 2, options.float_rent);
3338 __fsdiv = funcOfType ("__fsdiv", floatType, floatType, 2, options.float_rent);
3339 __fseq = funcOfType ("__fseq", CHARTYPE, floatType, 2, options.float_rent);
3340 __fsneq = funcOfType ("__fsneq", CHARTYPE, floatType, 2, options.float_rent);
3341 __fslt = funcOfType ("__fslt", CHARTYPE, floatType, 2, options.float_rent);
3342 __fslteq = funcOfType ("__fslteq", CHARTYPE, floatType, 2, options.float_rent);
3343 __fsgt = funcOfType ("__fsgt", CHARTYPE, floatType, 2, options.float_rent);
3344 __fsgteq = funcOfType ("__fsgteq", CHARTYPE, floatType, 2, options.float_rent);
3346 __fps16x16_add = funcOfType ("__fps16x16_add", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3347 __fps16x16_sub = funcOfType ("__fps16x16_sub", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3348 __fps16x16_mul = funcOfType ("__fps16x16_mul", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3349 __fps16x16_div = funcOfType ("__fps16x16_div", fixed16x16Type, fixed16x16Type, 2, options.float_rent);
3350 __fps16x16_eq = funcOfType ("__fps16x16_eq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3351 __fps16x16_neq = funcOfType ("__fps16x16_neq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3352 __fps16x16_lt = funcOfType ("__fps16x16_lt", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3353 __fps16x16_lteq = funcOfType ("__fps16x16_lteq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3354 __fps16x16_gt = funcOfType ("__fps16x16_gt", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3355 __fps16x16_gteq = funcOfType ("__fps16x16_gteq", CHARTYPE, fixed16x16Type, 2, options.float_rent);
3358 for (tofrom = 0; tofrom < 2; tofrom++)
3360 for (bwd = 0; bwd < 3; bwd++)
3362 for (su = 0; su < 2; su++)
3366 SNPRINTF (buffer, sizeof(buffer), "__fs2%s%s", ssu[su], sbwd[bwd]);
3367 __conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], floatType, 1, options.float_rent);
3371 SNPRINTF (buffer, sizeof(buffer), "__%s%s2fs", ssu[su], sbwd[bwd]);
3372 __conv[tofrom][bwd][su] = funcOfType (buffer, floatType, __multypes[bwd][su], 1, options.float_rent);
3378 for (tofrom = 0; tofrom < 2; tofrom++)
3380 for (bwd = 0; bwd < 4; bwd++)
3382 for (su = 0; su < 2; su++)
3386 SNPRINTF (buffer, sizeof(buffer), "__fps16x162%s%s", ssu[su], fp16x16sbwd[bwd]);
3388 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, floatType, fixed16x16Type, 1, options.float_rent);
3390 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], fixed16x16Type, 1, options.float_rent);
3394 SNPRINTF (buffer, sizeof(buffer), "__%s%s2fps16x16", ssu[su], fp16x16sbwd[bwd]);
3396 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, fixed16x16Type, floatType, 1, options.float_rent);
3398 __fp16x16conv[tofrom][bwd][su] = funcOfType (buffer, fixed16x16Type, __multypes[bwd][su], 1, options.float_rent);
3405 for (muldivmod = 0; muldivmod < 3; muldivmod++)
3407 for (bwd = 0; bwd < 3; bwd++)
3409 for (su = 0; su < 2; su++)
3411 SNPRINTF (buffer, sizeof(buffer),
3413 smuldivmod[muldivmod],
3416 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3417 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3422 muluint() and mulsint() resp. mululong() and mulslong() return the same result.
3423 Therefore they've been merged into mulint() and mullong().
3426 for (bwd = 0; bwd < 3; bwd++)
3428 for (su = 0; su < 2; su++)
3430 for (muldivmod = 1; muldivmod < 3; muldivmod++)
3433 SNPRINTF (buffer, sizeof(buffer),
3435 smuldivmod[muldivmod],
3438 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3439 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3447 for (su = 0; su < 2; su++)
3449 /* muluchar and mulschar are still separate functions, because e.g. the z80
3450 port is sign/zero-extending to int before calling mulint() */
3451 SNPRINTF (buffer, sizeof(buffer),
3453 smuldivmod[muldivmod],
3456 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3457 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3461 /* word and doubleword */
3462 for (bwd = 1; bwd < 3; bwd++)
3465 SNPRINTF (buffer, sizeof(buffer),
3467 smuldivmod[muldivmod],
3469 __muldiv[muldivmod][bwd][0] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3470 FUNC_NONBANKED (__muldiv[muldivmod][bwd][0]->type) = 1;
3471 /* signed = unsigned */
3472 __muldiv[muldivmod][bwd][1] = __muldiv[muldivmod][bwd][0];
3475 for (rlrr = 0; rlrr < 2; rlrr++)
3477 for (bwd = 0; bwd < 3; bwd++)
3479 for (su = 0; su < 2; su++)
3481 SNPRINTF (buffer, sizeof(buffer),
3486 __rlrr[rlrr][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[0][0], 2, options.intlong_rent);
3487 FUNC_NONBANKED (__rlrr[rlrr][bwd][su]->type) = 1;
3493 /*-----------------------------------------------------------------*/
3494 /* initBuiltIns - create prototypes for builtin functions */
3495 /*-----------------------------------------------------------------*/
3501 if (!port->builtintable) return ;
3503 for (i = 0 ; port->builtintable[i].name ; i++) {
3504 sym = funcOfTypeVarg(port->builtintable[i].name,port->builtintable[i].rtype,
3505 port->builtintable[i].nParms,port->builtintable[i].parm_types);
3506 FUNC_ISBUILTIN(sym->type) = 1;
3507 FUNC_ISREENT(sym->type) = 0; /* can never be reentrant */
3511 sym_link *validateLink(sym_link *l,
3518 if (l && l->class==select)
3523 "Internal error: validateLink failed in %s(%s) @ %s:%u:"
3524 " expected %s, got %s\n",
3525 macro, args, file, line,
3526 DECLSPEC2TXT(select), l ? DECLSPEC2TXT(l->class) : "null-link");
3528 return l; // never reached, makes compiler happy.
3531 /*--------------------------------------------------------------------*/
3532 /* newEnumType - create an integer type compatible with enumerations */
3533 /*--------------------------------------------------------------------*/
3535 newEnumType (symbol *enumlist)
3543 type = newLink (SPECIFIER);
3544 SPEC_NOUN (type) = V_INT;
3548 /* Determine the range of the enumerated values */
3550 min = max = (int) floatFromVal (valFromType (sym->type));
3551 for (sym = sym->next; sym; sym = sym->next)
3553 v = (int) floatFromVal (valFromType (sym->type));
3560 /* Determine the smallest integer type that is compatible with this range */
3561 type = newLink (SPECIFIER);
3562 if (min>=0 && max<=255)
3564 SPEC_NOUN (type) = V_CHAR;
3565 SPEC_USIGN (type) = 1;
3567 else if (min>=-128 && max<=127)
3569 SPEC_NOUN (type) = V_CHAR;
3571 else if (min>=0 && max<=65535)
3573 SPEC_NOUN (type) = V_INT;
3574 SPEC_USIGN (type) = 1;
3576 else if (min>=-32768 && max<=32767)
3578 SPEC_NOUN (type) = V_INT;
3582 SPEC_NOUN (type) = V_INT;
3583 SPEC_LONG (type) = 1;
3585 SPEC_USIGN (type) = 1;