1 /*----------------------------------------------------------------------
2 SDCCval.c :- has routine to do all kinds of fun stuff with the
3 value wrapper & with initialiser lists.
5 Written By - Sandeep Dutta . sandeep.dutta@usa.net (1998)
7 This program is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 2, or (at your option) any
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 In other words, you are welcome to use, share and improve this program.
22 You are forbidden to forbid anyone else to use, share and improve
23 what you give them. Help stamp out software-hoarding!
24 -------------------------------------------------------------------------*/
34 /*-----------------------------------------------------------------*/
35 /* newValue - allocates and returns a new value */
36 /*-----------------------------------------------------------------*/
42 val = Safe_alloc (sizeof (value));
47 /*-----------------------------------------------------------------*/
48 /* newiList - new initializer list */
49 /*-----------------------------------------------------------------*/
51 newiList (int type, void *ilist)
56 nilist = Safe_alloc (sizeof (initList));
59 nilist->lineno = yylineno;
64 nilist->init.node = (struct ast *) ilist;
68 nilist->init.deep = (struct initList *) ilist;
75 /*------------------------------------------------------------------*/
76 /* revinit - reverses the initial values for a value chain */
77 /*------------------------------------------------------------------*/
79 revinit (initList * val)
81 initList *prev, *curr, *next;
96 val->next = (void *) NULL;
101 convertIListToConstList(initList *src, literalList **lList)
104 literalList *head, *last, *newL;
108 if (!src || src->type != INIT_DEEP)
113 iLoop = src->init.deep;
117 if (iLoop->type != INIT_NODE)
122 if (!IS_AST_LIT_VALUE(decorateType(resolveSymbols(iLoop->init.node))))
129 // We've now established that the initializer list contains only literal values.
131 iLoop = src->init.deep;
134 double val = AST_LIT_VALUE(iLoop->init.node);
136 if (last && last->literalValue == val)
142 newL = Safe_alloc(sizeof(literalList));
143 newL->literalValue = val;
170 copyLiteralList(literalList *src)
172 literalList *head, *prev, *newL;
178 newL = Safe_alloc(sizeof(literalList));
180 newL->literalValue = src->literalValue;
181 newL->count = src->count;
201 /*------------------------------------------------------------------*/
202 /* copyIlist - copy initializer list */
203 /*------------------------------------------------------------------*/
205 copyIlist (initList * src)
207 initList *dest = NULL;
215 dest = newiList (INIT_DEEP, copyIlist (src->init.deep));
218 dest = newiList (INIT_NODE, copyAst (src->init.node));
223 dest->next = copyIlist (src->next);
228 /*------------------------------------------------------------------*/
229 /* list2int - converts the first element of the list to value */
230 /*------------------------------------------------------------------*/
232 list2int (initList * val)
236 if (i->type == INIT_DEEP)
237 return list2int (val->init.deep);
239 return floatFromVal (constExprValue (val->init.node, TRUE));
242 /*------------------------------------------------------------------*/
243 /* list2val - converts the first element of the list to value */
244 /*------------------------------------------------------------------*/
246 list2val (initList * val)
251 if (val->type == INIT_DEEP)
252 return list2val (val->init.deep);
254 return constExprValue (val->init.node, TRUE);
257 /*------------------------------------------------------------------*/
258 /* list2expr - returns the first expression in the initializer list */
259 /*------------------------------------------------------------------*/
261 list2expr (initList * ilist)
263 if (ilist->type == INIT_DEEP)
264 return list2expr (ilist->init.deep);
265 return ilist->init.node;
268 /*------------------------------------------------------------------*/
269 /* resolveIvalSym - resolve symbols in initial values */
270 /*------------------------------------------------------------------*/
272 resolveIvalSym (initList * ilist)
277 if (ilist->type == INIT_NODE)
278 ilist->init.node = decorateType (resolveSymbols (ilist->init.node));
280 if (ilist->type == INIT_DEEP)
281 resolveIvalSym (ilist->init.deep);
283 resolveIvalSym (ilist->next);
286 /*-----------------------------------------------------------------*/
287 /* symbolVal - creates a value for a symbol */
288 /*-----------------------------------------------------------------*/
290 symbolVal (symbol * sym)
302 val->type = sym->type;
303 val->etype = getSpec (val->type);
307 sprintf (val->name, "%s", sym->rname);
309 sprintf (val->name, "_%s", sym->name);
315 /*--------------------------------------------------------------------*/
316 /* cheapestVal - convert a val to the cheapest as possible value */
317 /*--------------------------------------------------------------------*/
318 value *cheapestVal (value *val) {
320 unsigned long uval=0;
322 if (IS_FLOAT(val->type) || IS_CHAR(val->type))
325 if (SPEC_LONG(val->type)) {
326 if (SPEC_USIGN(val->type)) {
327 uval=SPEC_CVAL(val->type).v_ulong;
329 sval=SPEC_CVAL(val->type).v_long;
332 if (SPEC_USIGN(val->type)) {
333 uval=SPEC_CVAL(val->type).v_uint;
335 sval=SPEC_CVAL(val->type).v_int;
339 if (SPEC_USIGN(val->type)) {
341 SPEC_LONG(val->type)=0;
342 SPEC_CVAL(val->type).v_uint = uval;
344 SPEC_NOUN(val->type)=V_CHAR;
347 } else { // not unsigned
350 SPEC_LONG(val->type)=0;
351 SPEC_CVAL(val->type).v_int = sval;
353 SPEC_NOUN(val->type)=V_CHAR;
357 SPEC_USIGN(val->type)=1;
359 SPEC_LONG(val->type)=0;
360 SPEC_CVAL(val->type).v_int = sval;
362 SPEC_NOUN(val->type)=V_CHAR;
370 /*-----------------------------------------------------------------*/
371 /* valueFromLit - creates a value from a literal */
372 /*-----------------------------------------------------------------*/
374 valueFromLit (double lit)
378 if ((((long) lit) - lit) == 0)
380 sprintf (buffer, "%ld", (long) lit);
381 return constVal (buffer);
384 sprintf (buffer, "%f", lit);
385 return constFloatVal (buffer);
388 /*-----------------------------------------------------------------*/
389 /* constFloatVal - converts a FLOAT constant to value */
390 /*-----------------------------------------------------------------*/
392 constFloatVal (char *s)
394 value *val = newValue ();
397 if (sscanf (s, "%lf", &sval) != 1)
399 werror (E_INVALID_FLOAT_CONST, s);
400 return constVal ("0");
403 val->type = val->etype = newLink ();
404 val->type->class = SPECIFIER;
405 SPEC_NOUN (val->type) = V_FLOAT;
406 SPEC_SCLS (val->type) = S_LITERAL;
407 SPEC_CVAL (val->type).v_float = sval;
412 /*-----------------------------------------------------------------*/
413 /* constVal - converts an INTEGER constant into a cheapest value */
414 /*-----------------------------------------------------------------*/
415 value *constVal (char *s)
418 short hex = 0, octal = 0;
423 val = newValue (); /* alloc space for value */
425 val->type = val->etype = newLink (); /* create the spcifier */
426 val->type->class = SPECIFIER;
427 SPEC_SCLS (val->type) = S_LITERAL;
428 // let's start with an unsigned char
429 SPEC_NOUN (val->type) = V_CHAR;
430 SPEC_USIGN (val->type) = 1;
432 hex = ((strchr (s, 'x') || strchr (s, 'X')) ? 1 : 0);
434 /* set the octal flag */
435 if (!hex && *s == '0' && *(s + 1))
438 /* create the scan string */
439 scanFmt[scI++] = '%';
441 scanFmt[scI++] = 'l';
444 scanFmt[scI++] = 'o';
446 scanFmt[scI++] = 'x';
448 scanFmt[scI++] = 'f';
450 scanFmt[scI++] = '\0';
454 sscanf (s, scanFmt, &sval);
457 sscanf (s, scanFmt, &dval);
460 /* Setup the flags first */
461 /* set the _long flag if 'lL' is found */
462 if (strchr (s, 'l') || strchr (s, 'L')) {
463 SPEC_NOUN (val->type) = V_INT;
464 SPEC_LONG (val->type) = 1;
467 if (dval<0) { // "-28u" will still be signed and negative
468 SPEC_USIGN (val->type) = 0;
469 if (dval<-128) { // check if we have to promote to int
470 SPEC_NOUN (val->type) = V_INT;
472 if (dval<-32768) { // check if we have to promote to long int
473 SPEC_LONG (val->type) = 1;
476 if (dval>0xff) { // check if we have to promote to int
477 SPEC_NOUN (val->type) = V_INT;
479 if (dval>0xffff) { // check if we have to promote to long int
480 SPEC_LONG (val->type) = 1;
484 if (SPEC_LONG (val->type))
486 if (SPEC_USIGN (val->type))
488 SPEC_CVAL (val->type).v_ulong = dval;
492 SPEC_CVAL (val->type).v_long = dval;
497 if (SPEC_USIGN (val->type))
499 SPEC_CVAL (val->type).v_uint = dval;
503 SPEC_CVAL (val->type).v_int = dval;
510 /*! /fn char hexEscape(char **src)
512 /param src Pointer to 'x' from start of hex character value
515 unsigned char hexEscape(char **src)
518 unsigned long value ;
520 (*src)++ ; /* Skip over the 'x' */
521 s = *src ; /* Save for error detection */
523 value = strtol (*src, src, 16);
526 // no valid hex found
527 werror(E_INVALID_HEX);
530 werror(W_ESC_SEQ_OOR_FOR_CHAR);
536 /*------------------------------------------------------------------*/
537 /* octalEscape - process an octal constant of max three digits */
538 /* return the octal value, throw a warning for illegal octal */
539 /* adjust src to point at the last proccesed char */
540 /*------------------------------------------------------------------*/
542 unsigned char octalEscape (char **str) {
546 for (digits=0; digits<3; digits++) {
547 if (**str>='0' && **str<='7') {
548 value = value*8 + (**str-'0');
555 if (value > 255 /* || (**str>='0' && **str<='7') */ ) {
556 werror (W_ESC_SEQ_OOR_FOR_CHAR);
563 /fn int copyStr (char *dest, char *src)
565 Copies a source string to a dest buffer interpreting escape sequences
566 and special characters
568 /param dest Buffer to receive the resultant string
569 /param src Buffer containing the source string with escape sequecnes
570 /return Number of characters in output string
575 copyStr (char *dest, char *src)
578 char *OriginalDest = dest ;
584 else if (*src == '\\')
619 *dest++ = octalEscape(&src);
624 *dest++ = hexEscape(&src) ;
651 return dest - OriginalDest ;
654 /*------------------------------------------------------------------*/
655 /* strVal - converts a string constant to a value */
656 /*------------------------------------------------------------------*/
662 val = newValue (); /* get a new one */
664 /* get a declarator */
665 val->type = newLink ();
666 DCL_TYPE (val->type) = ARRAY;
667 val->type->next = val->etype = newLink ();
668 val->etype->class = SPECIFIER;
669 SPEC_NOUN (val->etype) = V_CHAR;
670 SPEC_SCLS (val->etype) = S_LITERAL;
672 SPEC_CVAL (val->etype).v_char = Safe_alloc (strlen (s) + 1);
673 DCL_ELEM (val->type) = copyStr (SPEC_CVAL (val->etype).v_char, s);
679 /*------------------------------------------------------------------*/
680 /* reverseValWithType - reverses value chain with type & etype */
681 /*------------------------------------------------------------------*/
683 reverseValWithType (value * val)
691 /* save the type * etype chains */
695 /* set the current one 2b null */
696 val->type = val->etype = NULL;
697 val = reverseVal (val);
699 /* restore type & etype */
706 /*------------------------------------------------------------------*/
707 /* reverseVal - reverses the values for a value chain */
708 /*------------------------------------------------------------------*/
710 reverseVal (value * val)
712 value *prev, *curr, *next;
727 val->next = (void *) NULL;
731 /*------------------------------------------------------------------*/
732 /* copyValueChain - will copy a chain of values */
733 /*------------------------------------------------------------------*/
735 copyValueChain (value * src)
742 dest = copyValue (src);
743 dest->next = copyValueChain (src->next);
748 /*------------------------------------------------------------------*/
749 /* copyValue - copies contents of a value to a fresh one */
750 /*------------------------------------------------------------------*/
752 copyValue (value * src)
757 dest->sym = copySymbol (src->sym);
758 strcpy (dest->name, src->name);
759 dest->type = (src->type ? copyLinkChain (src->type) : NULL);
760 dest->etype = (src->type ? getSpec (dest->type) : NULL);
765 /*------------------------------------------------------------------*/
766 /* charVal - converts a character constant to a value */
767 /*------------------------------------------------------------------*/
776 val->type = val->etype = newLink ();
777 val->type->class = SPECIFIER;
778 SPEC_NOUN (val->type) = V_CHAR;
779 SPEC_USIGN(val->type) = 1;
780 SPEC_SCLS (val->type) = S_LITERAL;
782 s++; /* get rid of quotation */
783 /* if \ then special processing */
786 s++; /* go beyond the backslash */
790 SPEC_CVAL (val->type).v_int = '\n';
793 SPEC_CVAL (val->type).v_int = '\t';
796 SPEC_CVAL (val->type).v_int = '\v';
799 SPEC_CVAL (val->type).v_int = '\b';
802 SPEC_CVAL (val->type).v_int = '\r';
805 SPEC_CVAL (val->type).v_int = '\f';
808 SPEC_CVAL (val->type).v_int = '\a';
811 SPEC_CVAL (val->type).v_int = '\\';
814 SPEC_CVAL (val->type).v_int = '\?';
817 SPEC_CVAL (val->type).v_int = '\'';
820 SPEC_CVAL (val->type).v_int = '\"';
831 SPEC_CVAL (val->type).v_uint = octalEscape(&s);
835 SPEC_CVAL (val->type).v_uint = hexEscape(&s) ;
839 SPEC_CVAL (val->type).v_uint = (unsigned char)*s;
843 else /* not a backslash */
844 SPEC_CVAL (val->type).v_uint = (unsigned char)*s;
849 /*------------------------------------------------------------------*/
850 /* valFromType - creates a value from type given */
851 /*------------------------------------------------------------------*/
853 valFromType (sym_link * type)
855 value *val = newValue ();
856 val->type = copyLinkChain (type);
857 val->etype = getSpec (val->type);
861 /*------------------------------------------------------------------*/
862 /* floatFromVal - value to double float conversion */
863 /*------------------------------------------------------------------*/
865 floatFromVal (value * val)
870 if (val->etype && SPEC_SCLS (val->etype) != S_LITERAL)
872 werror (E_CONST_EXPECTED, val->name);
876 /* if it is not a specifier then we can assume that */
877 /* it will be an unsigned long */
878 if (!IS_SPEC (val->type))
879 return (double) SPEC_CVAL (val->etype).v_ulong;
881 if (SPEC_NOUN (val->etype) == V_FLOAT)
882 return (double) SPEC_CVAL (val->etype).v_float;
884 if (SPEC_LONG (val->etype))
886 if (SPEC_USIGN (val->etype))
887 return (double) SPEC_CVAL (val->etype).v_ulong;
889 return (double) SPEC_CVAL (val->etype).v_long;
892 if (SPEC_NOUN (val->etype) == V_INT) {
893 if (SPEC_USIGN (val->etype))
894 return (double) SPEC_CVAL (val->etype).v_uint;
896 return (double) SPEC_CVAL (val->etype).v_int;
899 if (SPEC_NOUN (val->etype) == V_CHAR) {
900 if (SPEC_USIGN (val->etype))
901 return (double) (unsigned char)SPEC_CVAL (val->etype).v_uint;
903 return (double) (signed char)SPEC_CVAL (val->etype).v_int;
906 if (IS_BITVAR(val->etype)) {
907 return (double) SPEC_CVAL (val->etype).v_ulong;
911 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
912 "floatFromVal: unknown value");
917 /*------------------------------------------------------------------*/
918 /* valUnaryPM - does the unary +/- operation on a constant */
919 /*------------------------------------------------------------------*/
921 valUnaryPM (value * val)
923 /* depending on type */
924 if (SPEC_NOUN (val->etype) == V_FLOAT)
925 SPEC_CVAL (val->etype).v_float = -1.0 * SPEC_CVAL (val->etype).v_float;
928 if (SPEC_LONG (val->etype))
930 if (SPEC_USIGN (val->etype))
931 SPEC_CVAL (val->etype).v_ulong = 0-SPEC_CVAL (val->etype).v_ulong;
933 SPEC_CVAL (val->etype).v_long = -SPEC_CVAL (val->etype).v_long;
937 if (SPEC_USIGN (val->etype))
938 SPEC_CVAL (val->etype).v_uint = 0-SPEC_CVAL (val->etype).v_uint;
940 SPEC_CVAL (val->etype).v_int = -SPEC_CVAL (val->etype).v_int;
943 // -(unsigned 3) now really is signed
944 SPEC_USIGN(val->etype)=0;
948 /*------------------------------------------------------------------*/
949 /* valueComplement - complements a constant */
950 /*------------------------------------------------------------------*/
952 valComplement (value * val)
954 /* depending on type */
955 if (SPEC_LONG (val->etype))
957 if (SPEC_USIGN (val->etype))
958 SPEC_CVAL (val->etype).v_ulong = ~SPEC_CVAL (val->etype).v_ulong;
960 SPEC_CVAL (val->etype).v_long = ~SPEC_CVAL (val->etype).v_long;
964 if (SPEC_USIGN (val->etype))
965 SPEC_CVAL (val->etype).v_uint = ~SPEC_CVAL (val->etype).v_uint;
967 SPEC_CVAL (val->etype).v_int = ~SPEC_CVAL (val->etype).v_int;
972 /*------------------------------------------------------------------*/
973 /* valueNot - complements a constant */
974 /*------------------------------------------------------------------*/
978 /* depending on type */
979 if (SPEC_LONG (val->etype))
981 if (SPEC_USIGN (val->etype))
982 SPEC_CVAL (val->etype).v_ulong = !SPEC_CVAL (val->etype).v_ulong;
984 SPEC_CVAL (val->etype).v_long = !SPEC_CVAL (val->etype).v_long;
988 if (SPEC_USIGN (val->etype))
989 SPEC_CVAL (val->etype).v_uint = !SPEC_CVAL (val->etype).v_uint;
991 SPEC_CVAL (val->etype).v_int = !SPEC_CVAL (val->etype).v_int;
996 /*------------------------------------------------------------------*/
997 /* valMult - multiply constants */
998 /*------------------------------------------------------------------*/
1000 valMult (value * lval, value * rval)
1004 /* create a new value */
1006 val->type = val->etype = newLink ();
1007 val->type->class = SPECIFIER;
1008 SPEC_NOUN (val->type) = (IS_FLOAT (lval->etype) ||
1009 IS_FLOAT (rval->etype) ? V_FLOAT : V_INT);
1010 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1011 SPEC_USIGN (val->type) = (SPEC_USIGN (lval->etype) & SPEC_USIGN (rval->etype));
1012 SPEC_LONG (val->type) = 1;
1014 if (IS_FLOAT (val->type))
1015 SPEC_CVAL (val->type).v_float = floatFromVal (lval) * floatFromVal (rval);
1018 if (SPEC_LONG (val->type))
1020 if (SPEC_USIGN (val->type))
1021 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) *
1022 (unsigned long) floatFromVal (rval);
1024 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) *
1025 (long) floatFromVal (rval);
1028 return cheapestVal(val);
1031 /*------------------------------------------------------------------*/
1032 /* valDiv - Divide constants */
1033 /*------------------------------------------------------------------*/
1035 valDiv (value * lval, value * rval)
1039 if (floatFromVal (rval) == 0)
1041 werror (E_DIVIDE_BY_ZERO);
1045 /* create a new value */
1047 val->type = val->etype = newLink();
1048 val->type->class = SPECIFIER;
1049 SPEC_NOUN (val->type) = (IS_FLOAT (lval->etype) ||
1050 IS_FLOAT (rval->etype) ? V_FLOAT : V_INT);
1051 SPEC_SCLS (val->etype) = S_LITERAL;
1052 SPEC_USIGN (val->type) = (SPEC_USIGN (lval->etype) & SPEC_USIGN (rval->etype));
1053 SPEC_LONG (val->type) = (SPEC_LONG (lval->etype) | SPEC_LONG (rval->etype));
1055 if (IS_FLOAT (val->type))
1056 SPEC_CVAL (val->type).v_float = floatFromVal (lval) / floatFromVal (rval);
1059 if (SPEC_LONG (val->type))
1061 if (SPEC_USIGN (val->type))
1062 SPEC_CVAL (val->type).v_ulong =
1063 (unsigned long) floatFromVal (lval) /
1064 (unsigned long) floatFromVal (rval);
1066 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) /
1067 (long) floatFromVal (rval);
1071 if (SPEC_USIGN (val->type)) {
1072 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) /
1073 (unsigned) floatFromVal (rval);
1075 SPEC_CVAL (val->type).v_int = (int) floatFromVal (lval) /
1076 (int) floatFromVal (rval);
1080 return cheapestVal(val);
1083 /*------------------------------------------------------------------*/
1084 /* valMod - Modulus constants */
1085 /*------------------------------------------------------------------*/
1087 valMod (value * lval, value * rval)
1091 /* create a new value */
1093 val->type = val->etype = newLink ();
1094 val->type->class = SPECIFIER;
1095 SPEC_NOUN (val->type) = V_INT; /* type is int */
1096 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1097 SPEC_USIGN (val->type) = (SPEC_USIGN (lval->etype) & SPEC_USIGN (rval->etype));
1098 SPEC_LONG (val->type) = (SPEC_LONG (lval->etype) | SPEC_LONG (rval->etype));
1100 if (SPEC_LONG (val->type))
1102 if (SPEC_USIGN (val->type))
1103 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) %
1104 (unsigned long) floatFromVal (rval);
1106 SPEC_CVAL (val->type).v_long = (unsigned long) floatFromVal (lval) %
1107 (unsigned long) floatFromVal (rval);
1111 if (SPEC_USIGN (val->type)) {
1112 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) %
1113 (unsigned) floatFromVal (rval);
1115 SPEC_CVAL (val->type).v_int = (unsigned) floatFromVal (lval) %
1116 (unsigned) floatFromVal (rval);
1120 return cheapestVal(val);
1123 /*------------------------------------------------------------------*/
1124 /* valPlus - Addition constants */
1125 /*------------------------------------------------------------------*/
1127 valPlus (value * lval, value * rval)
1131 /* create a new value */
1133 val->type = val->etype = newLink ();
1134 val->type->class = SPECIFIER;
1135 SPEC_NOUN (val->type) = (IS_FLOAT (lval->etype) ||
1136 IS_FLOAT (rval->etype) ? V_FLOAT : V_INT);
1137 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1138 SPEC_USIGN (val->type) =
1139 SPEC_USIGN (lval->etype) &&
1140 SPEC_USIGN (rval->etype) &&
1141 (floatFromVal(lval)+floatFromVal(rval))>=0;
1143 SPEC_LONG (val->type) = 1;
1145 if (IS_FLOAT (val->type))
1146 SPEC_CVAL (val->type).v_float = floatFromVal (lval) + floatFromVal (rval);
1149 if (SPEC_LONG (val->type))
1151 if (SPEC_USIGN (val->type))
1152 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) +
1153 (unsigned long) floatFromVal (rval);
1155 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) +
1156 (long) floatFromVal (rval);
1159 return cheapestVal(val);
1162 /*------------------------------------------------------------------*/
1163 /* valMinus - Addition constants */
1164 /*------------------------------------------------------------------*/
1166 valMinus (value * lval, value * rval)
1170 /* create a new value */
1172 val->type = val->etype = newLink ();
1173 val->type->class = SPECIFIER;
1174 SPEC_NOUN (val->type) = (IS_FLOAT (lval->etype) ||
1175 IS_FLOAT (rval->etype) ? V_FLOAT : V_INT);
1176 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1177 SPEC_USIGN (val->type) =
1178 SPEC_USIGN (lval->etype) &&
1179 SPEC_USIGN (rval->etype) &&
1180 (floatFromVal(lval)-floatFromVal(rval))>=0;
1182 SPEC_LONG (val->type) = (SPEC_LONG (lval->etype) | SPEC_LONG (rval->etype));
1184 if (IS_FLOAT (val->type))
1185 SPEC_CVAL (val->type).v_float = floatFromVal (lval) - floatFromVal (rval);
1188 if (SPEC_LONG (val->type))
1190 if (SPEC_USIGN (val->type)) {
1191 SPEC_CVAL (val->type).v_ulong =
1192 (unsigned long) floatFromVal (lval) -
1193 (unsigned long) floatFromVal (rval);
1195 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) -
1196 (long) floatFromVal (rval);
1201 if (SPEC_USIGN (val->type)) {
1202 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) -
1203 (unsigned) floatFromVal (rval);
1205 SPEC_CVAL (val->type).v_int = (int) floatFromVal (lval) -
1206 (int) floatFromVal (rval);
1210 return cheapestVal(val);
1213 /*------------------------------------------------------------------*/
1214 /* valShift - Shift left or right */
1215 /*------------------------------------------------------------------*/
1217 valShift (value * lval, value * rval, int lr)
1221 /* create a new value */
1223 val->type = val->etype = newIntLink ();
1224 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1225 SPEC_USIGN (val->type) = (SPEC_USIGN (lval->etype) & SPEC_USIGN (rval->etype));
1226 SPEC_LONG (val->type) = 1;
1228 if (SPEC_LONG (val->type))
1230 if (SPEC_USIGN (val->type))
1231 SPEC_CVAL (val->type).v_ulong = lr ?
1232 (unsigned long) floatFromVal (lval) << (unsigned long) floatFromVal (rval) : \
1233 (unsigned long) floatFromVal (lval) >> (unsigned long) floatFromVal (rval);
1235 SPEC_CVAL (val->type).v_long = lr ?
1236 (long) floatFromVal (lval) << (long) floatFromVal (rval) : \
1237 (long) floatFromVal (lval) >> (long) floatFromVal (rval);
1240 return cheapestVal(val);
1243 /*------------------------------------------------------------------*/
1244 /* valCompare- Compares two literal */
1245 /*------------------------------------------------------------------*/
1247 valCompare (value * lval, value * rval, int ctype)
1251 /* create a new value */
1253 val->type = val->etype = newCharLink ();
1254 val->type->class = SPECIFIER;
1255 SPEC_NOUN (val->type) = V_CHAR; /* type is char */
1256 SPEC_USIGN (val->type) = 1;
1257 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1262 SPEC_CVAL (val->type).v_int = floatFromVal (lval) < floatFromVal (rval);
1266 SPEC_CVAL (val->type).v_int = floatFromVal (lval) > floatFromVal (rval);
1270 SPEC_CVAL (val->type).v_int = floatFromVal (lval) <= floatFromVal (rval);
1274 SPEC_CVAL (val->type).v_int = floatFromVal (lval) >= floatFromVal (rval);
1278 SPEC_CVAL (val->type).v_int = floatFromVal (lval) == floatFromVal (rval);
1282 SPEC_CVAL (val->type).v_int = floatFromVal (lval) != floatFromVal (rval);
1290 /*------------------------------------------------------------------*/
1291 /* valBitwise - Bitwise operation */
1292 /*------------------------------------------------------------------*/
1294 valBitwise (value * lval, value * rval, int op)
1298 /* create a new value */
1300 val->type = copyLinkChain (lval->type);
1301 val->etype = getSpec (val->type);
1306 if (SPEC_LONG (val->type))
1308 if (SPEC_USIGN (val->type))
1309 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) &
1310 (unsigned long) floatFromVal (rval);
1312 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) &
1313 (long) floatFromVal (rval);
1317 if (SPEC_USIGN (val->type))
1318 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) &
1319 (unsigned) floatFromVal (rval);
1321 SPEC_CVAL (val->type).v_int = (int) floatFromVal (lval) & (int) floatFromVal (rval);
1326 if (SPEC_LONG (val->type))
1328 if (SPEC_USIGN (val->type))
1329 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) |
1330 (unsigned long) floatFromVal (rval);
1332 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) |
1333 (long) floatFromVal (rval);
1337 if (SPEC_USIGN (val->type))
1338 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) |
1339 (unsigned) floatFromVal (rval);
1341 SPEC_CVAL (val->type).v_int =
1342 (int) floatFromVal (lval) | (int) floatFromVal (rval);
1348 if (SPEC_LONG (val->type))
1350 if (SPEC_USIGN (val->type))
1351 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) ^
1352 (unsigned long) floatFromVal (rval);
1354 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) ^
1355 (long) floatFromVal (rval);
1359 if (SPEC_USIGN (val->type))
1360 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) ^
1361 (unsigned) floatFromVal (rval);
1363 SPEC_CVAL (val->type).v_int =
1364 (int) floatFromVal (lval) ^ (int) floatFromVal (rval);
1369 return cheapestVal(val);
1372 /*------------------------------------------------------------------*/
1373 /* valAndOr - Generates code for and / or operation */
1374 /*------------------------------------------------------------------*/
1376 valLogicAndOr (value * lval, value * rval, int op)
1380 /* create a new value */
1382 val->type = val->etype = newCharLink ();
1383 val->type->class = SPECIFIER;
1384 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1385 SPEC_USIGN (val->type) = 0;
1390 SPEC_CVAL (val->type).v_int = floatFromVal (lval) && floatFromVal (rval);
1394 SPEC_CVAL (val->type).v_int = floatFromVal (lval) || floatFromVal (rval);
1402 /*------------------------------------------------------------------*/
1403 /* valCastLiteral - casts a literal value to another type */
1404 /*------------------------------------------------------------------*/
1406 valCastLiteral (sym_link * dtype, double fval)
1414 val->etype = getSpec (val->type = copyLinkChain (dtype));
1415 SPEC_SCLS (val->etype) = S_LITERAL;
1416 /* if it is not a specifier then we can assume that */
1417 /* it will be an unsigned long */
1418 if (!IS_SPEC (val->type)) {
1419 SPEC_CVAL (val->etype).v_ulong = (unsigned long) fval;
1423 if (SPEC_NOUN (val->etype) == V_FLOAT)
1424 SPEC_CVAL (val->etype).v_float = fval;
1426 unsigned long l = fval;
1427 if (SPEC_LONG (val->etype)) {
1428 if (SPEC_USIGN (val->etype))
1429 SPEC_CVAL (val->etype).v_ulong = (unsigned long) l;
1431 SPEC_CVAL (val->etype).v_long = (long) l;
1433 if (SPEC_USIGN (val->etype))
1434 SPEC_CVAL (val->etype).v_uint = (unsigned short)l;
1436 SPEC_CVAL (val->etype).v_int = (short)l;
1442 /*------------------------------------------------------------------*/
1443 /* getNelements - determines # of elements from init list */
1444 /*------------------------------------------------------------------*/
1446 getNelements (sym_link * type, initList * ilist)
1448 sym_link *etype = getSpec (type);
1454 if (ilist->type == INIT_DEEP)
1455 ilist = ilist->init.deep;
1457 /* if type is a character array and there is only one
1458 (string) initialiser then get the length of the string */
1459 if (IS_ARRAY (type) && IS_CHAR (etype) && !ilist->next)
1461 ast *iast = ilist->init.node;
1462 value *v = (iast->type == EX_VALUE ? iast->opval.val : NULL);
1465 werror (W_INIT_WRONG);
1469 if (IS_ARRAY (v->type) && IS_CHAR (v->etype))
1470 // yep, it's a string
1472 return DCL_ELEM (v->type);
1480 ilist = ilist->next;
1486 /*-----------------------------------------------------------------*/
1487 /* valForArray - returns a value with name of array index */
1488 /*-----------------------------------------------------------------*/
1490 valForArray (ast * arrExpr)
1492 value *val, *lval = NULL;
1494 int size = getSize (arrExpr->left->ftype->next);
1495 /* if the right or left is an array
1497 if (IS_AST_OP (arrExpr->left))
1499 if (arrExpr->left->opval.op == '[')
1500 lval = valForArray (arrExpr->left);
1501 else if (arrExpr->left->opval.op == '.')
1502 lval = valForStructElem (arrExpr->left->left,
1503 arrExpr->left->right);
1504 else if (arrExpr->left->opval.op == PTR_OP &&
1505 IS_ADDRESS_OF_OP (arrExpr->left->left))
1506 lval = valForStructElem (arrExpr->left->left->left,
1507 arrExpr->left->right);
1512 else if (!IS_AST_SYM_VALUE (arrExpr->left))
1515 if (!IS_AST_LIT_VALUE (arrExpr->right))
1520 sprintf (buffer, "%s", AST_SYMBOL (arrExpr->left)->rname);
1522 sprintf (buffer, "%s", lval->name);
1524 sprintf (val->name, "(%s + %d)", buffer,
1525 (int) AST_LIT_VALUE (arrExpr->right) * size);
1527 val->type = newLink ();
1528 if (SPEC_SCLS (arrExpr->left->etype) == S_CODE)
1530 DCL_TYPE (val->type) = CPOINTER;
1531 DCL_PTR_CONST (val->type) = port->mem.code_ro;
1533 else if (SPEC_SCLS (arrExpr->left->etype) == S_XDATA)
1534 DCL_TYPE (val->type) = FPOINTER;
1535 else if (SPEC_SCLS (arrExpr->left->etype) == S_XSTACK)
1536 DCL_TYPE (val->type) = PPOINTER;
1537 else if (SPEC_SCLS (arrExpr->left->etype) == S_IDATA)
1538 DCL_TYPE (val->type) = IPOINTER;
1539 else if (SPEC_SCLS (arrExpr->left->etype) == S_EEPROM)
1540 DCL_TYPE (val->type) = EEPPOINTER;
1542 DCL_TYPE (val->type) = POINTER;
1543 val->type->next = arrExpr->left->ftype;
1544 val->etype = getSpec (val->type);
1548 /*-----------------------------------------------------------------*/
1549 /* valForStructElem - returns value with name of struct element */
1550 /*-----------------------------------------------------------------*/
1552 valForStructElem (ast * structT, ast * elemT)
1554 value *val, *lval = NULL;
1558 /* left could be furthur derefed */
1559 if (IS_AST_OP (structT))
1561 if (structT->opval.op == '[')
1562 lval = valForArray (structT);
1563 else if (structT->opval.op == '.')
1564 lval = valForStructElem (structT->left, structT->right);
1565 else if (structT->opval.op == PTR_OP &&
1566 IS_ADDRESS_OF_OP (structT->left))
1567 lval = valForStructElem (structT->left->left,
1573 if (!IS_AST_SYM_VALUE (elemT))
1576 if (!IS_STRUCT (structT->etype))
1579 if ((sym = getStructElement (SPEC_STRUCT (structT->etype),
1580 AST_SYMBOL (elemT))) == NULL)
1587 sprintf (buffer, "%s", AST_SYMBOL (structT)->rname);
1589 sprintf (buffer, "%s", lval->name);
1591 sprintf (val->name, "(%s + %d)", buffer,
1594 val->type = newLink ();
1595 if (SPEC_SCLS (structT->etype) == S_CODE)
1597 DCL_TYPE (val->type) = CPOINTER;
1598 DCL_PTR_CONST (val->type) = port->mem.code_ro;
1600 else if (SPEC_SCLS (structT->etype) == S_XDATA)
1601 DCL_TYPE (val->type) = FPOINTER;
1602 else if (SPEC_SCLS (structT->etype) == S_XSTACK)
1603 DCL_TYPE (val->type) = PPOINTER;
1604 else if (SPEC_SCLS (structT->etype) == S_IDATA)
1605 DCL_TYPE (val->type) = IPOINTER;
1606 else if (SPEC_SCLS (structT->etype) == S_EEPROM)
1607 DCL_TYPE (val->type) = EEPPOINTER;
1609 DCL_TYPE (val->type) = POINTER;
1610 val->type->next = sym->type;
1611 val->etype = getSpec (val->type);
1615 /*-----------------------------------------------------------------*/
1616 /* valForCastAggr - will return value for a cast of an aggregate */
1617 /* plus minus a constant */
1618 /*-----------------------------------------------------------------*/
1620 valForCastAggr (ast * aexpr, sym_link * type, ast * cnst, int op)
1624 if (!IS_AST_SYM_VALUE (aexpr))
1626 if (!IS_AST_LIT_VALUE (cnst))
1631 sprintf (val->name, "(%s %c %d)",
1632 AST_SYMBOL (aexpr)->rname, op,
1633 getSize (type->next) * (int) AST_LIT_VALUE (cnst));
1636 val->etype = getSpec (val->type);
1640 /*-----------------------------------------------------------------*/
1641 /* valForCastAggr - will return value for a cast of an aggregate */
1642 /* with no constant */
1643 /*-----------------------------------------------------------------*/
1645 valForCastArr (ast * aexpr, sym_link * type)
1649 if (!IS_AST_SYM_VALUE (aexpr))
1654 sprintf (val->name, "(%s)",
1655 AST_SYMBOL (aexpr)->rname);
1658 val->etype = getSpec (val->type);