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;
910 if (SPEC_NOUN (val->etype) == V_VOID) {
911 return (double) SPEC_CVAL (val->etype).v_ulong;
915 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
916 "floatFromVal: unknown value");
921 /*------------------------------------------------------------------*/
922 /* valUnaryPM - does the unary +/- operation on a constant */
923 /*------------------------------------------------------------------*/
925 valUnaryPM (value * val)
927 /* depending on type */
928 if (SPEC_NOUN (val->etype) == V_FLOAT)
929 SPEC_CVAL (val->etype).v_float = -1.0 * SPEC_CVAL (val->etype).v_float;
932 if (SPEC_LONG (val->etype))
934 if (SPEC_USIGN (val->etype))
935 SPEC_CVAL (val->etype).v_ulong = 0-SPEC_CVAL (val->etype).v_ulong;
937 SPEC_CVAL (val->etype).v_long = -SPEC_CVAL (val->etype).v_long;
941 if (SPEC_USIGN (val->etype))
942 SPEC_CVAL (val->etype).v_uint = 0-SPEC_CVAL (val->etype).v_uint;
944 SPEC_CVAL (val->etype).v_int = -SPEC_CVAL (val->etype).v_int;
947 // -(unsigned 3) now really is signed
948 SPEC_USIGN(val->etype)=0;
952 /*------------------------------------------------------------------*/
953 /* valueComplement - complements a constant */
954 /*------------------------------------------------------------------*/
956 valComplement (value * val)
958 /* depending on type */
959 if (SPEC_LONG (val->etype))
961 if (SPEC_USIGN (val->etype))
962 SPEC_CVAL (val->etype).v_ulong = ~SPEC_CVAL (val->etype).v_ulong;
964 SPEC_CVAL (val->etype).v_long = ~SPEC_CVAL (val->etype).v_long;
968 if (SPEC_USIGN (val->etype))
969 SPEC_CVAL (val->etype).v_uint = ~SPEC_CVAL (val->etype).v_uint;
971 SPEC_CVAL (val->etype).v_int = ~SPEC_CVAL (val->etype).v_int;
973 // ~(unsigned 3) now really is signed
974 SPEC_USIGN(val->etype)=0;
978 /*------------------------------------------------------------------*/
979 /* valueNot - complements a constant */
980 /*------------------------------------------------------------------*/
984 /* depending on type */
985 if (SPEC_LONG (val->etype))
987 if (SPEC_USIGN (val->etype))
988 SPEC_CVAL (val->etype).v_ulong = !SPEC_CVAL (val->etype).v_ulong;
990 SPEC_CVAL (val->etype).v_long = !SPEC_CVAL (val->etype).v_long;
994 if (SPEC_USIGN (val->etype))
995 SPEC_CVAL (val->etype).v_uint = !SPEC_CVAL (val->etype).v_uint;
997 SPEC_CVAL (val->etype).v_int = !SPEC_CVAL (val->etype).v_int;
1002 /*------------------------------------------------------------------*/
1003 /* valMult - multiply constants */
1004 /*------------------------------------------------------------------*/
1006 valMult (value * lval, value * rval)
1010 /* create a new value */
1012 val->type = val->etype = newLink ();
1013 val->type->class = SPECIFIER;
1014 SPEC_NOUN (val->type) = (IS_FLOAT (lval->etype) ||
1015 IS_FLOAT (rval->etype) ? V_FLOAT : V_INT);
1016 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1017 SPEC_USIGN (val->type) = (SPEC_USIGN (lval->etype) & SPEC_USIGN (rval->etype));
1018 SPEC_LONG (val->type) = 1;
1020 if (IS_FLOAT (val->type))
1021 SPEC_CVAL (val->type).v_float = floatFromVal (lval) * floatFromVal (rval);
1024 if (SPEC_LONG (val->type))
1026 if (SPEC_USIGN (val->type))
1027 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) *
1028 (unsigned long) floatFromVal (rval);
1030 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) *
1031 (long) floatFromVal (rval);
1034 return cheapestVal(val);
1037 /*------------------------------------------------------------------*/
1038 /* valDiv - Divide constants */
1039 /*------------------------------------------------------------------*/
1041 valDiv (value * lval, value * rval)
1045 if (floatFromVal (rval) == 0)
1047 werror (E_DIVIDE_BY_ZERO);
1051 /* create a new value */
1053 val->type = val->etype = newLink();
1054 val->type->class = SPECIFIER;
1055 SPEC_NOUN (val->type) = (IS_FLOAT (lval->etype) ||
1056 IS_FLOAT (rval->etype) ? V_FLOAT : V_INT);
1057 SPEC_SCLS (val->etype) = S_LITERAL;
1058 SPEC_USIGN (val->type) = (SPEC_USIGN (lval->etype) & SPEC_USIGN (rval->etype));
1059 SPEC_LONG (val->type) = (SPEC_LONG (lval->etype) | SPEC_LONG (rval->etype));
1061 if (IS_FLOAT (val->type))
1062 SPEC_CVAL (val->type).v_float = floatFromVal (lval) / floatFromVal (rval);
1065 if (SPEC_LONG (val->type))
1067 if (SPEC_USIGN (val->type))
1068 SPEC_CVAL (val->type).v_ulong =
1069 (unsigned long) floatFromVal (lval) /
1070 (unsigned long) floatFromVal (rval);
1072 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) /
1073 (long) floatFromVal (rval);
1077 if (SPEC_USIGN (val->type)) {
1078 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) /
1079 (unsigned) floatFromVal (rval);
1081 SPEC_CVAL (val->type).v_int = (int) floatFromVal (lval) /
1082 (int) floatFromVal (rval);
1086 return cheapestVal(val);
1089 /*------------------------------------------------------------------*/
1090 /* valMod - Modulus constants */
1091 /*------------------------------------------------------------------*/
1093 valMod (value * lval, value * rval)
1097 /* create a new value */
1099 val->type = val->etype = newLink ();
1100 val->type->class = SPECIFIER;
1101 SPEC_NOUN (val->type) = V_INT; /* type is int */
1102 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1103 SPEC_USIGN (val->type) = (SPEC_USIGN (lval->etype) & SPEC_USIGN (rval->etype));
1104 SPEC_LONG (val->type) = (SPEC_LONG (lval->etype) | SPEC_LONG (rval->etype));
1106 if (SPEC_LONG (val->type))
1108 if (SPEC_USIGN (val->type))
1109 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) %
1110 (unsigned long) floatFromVal (rval);
1112 SPEC_CVAL (val->type).v_long = (unsigned long) floatFromVal (lval) %
1113 (unsigned long) floatFromVal (rval);
1117 if (SPEC_USIGN (val->type)) {
1118 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) %
1119 (unsigned) floatFromVal (rval);
1121 SPEC_CVAL (val->type).v_int = (unsigned) floatFromVal (lval) %
1122 (unsigned) floatFromVal (rval);
1126 return cheapestVal(val);
1129 /*------------------------------------------------------------------*/
1130 /* valPlus - Addition constants */
1131 /*------------------------------------------------------------------*/
1133 valPlus (value * lval, value * rval)
1137 /* create a new value */
1139 val->type = val->etype = newLink ();
1140 val->type->class = SPECIFIER;
1141 SPEC_NOUN (val->type) = (IS_FLOAT (lval->etype) ||
1142 IS_FLOAT (rval->etype) ? V_FLOAT : V_INT);
1143 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1144 SPEC_USIGN (val->type) =
1145 SPEC_USIGN (lval->etype) &&
1146 SPEC_USIGN (rval->etype) &&
1147 (floatFromVal(lval)+floatFromVal(rval))>=0;
1149 SPEC_LONG (val->type) = 1;
1151 if (IS_FLOAT (val->type))
1152 SPEC_CVAL (val->type).v_float = floatFromVal (lval) + floatFromVal (rval);
1155 if (SPEC_LONG (val->type))
1157 if (SPEC_USIGN (val->type))
1158 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) +
1159 (unsigned long) floatFromVal (rval);
1161 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) +
1162 (long) floatFromVal (rval);
1165 return cheapestVal(val);
1168 /*------------------------------------------------------------------*/
1169 /* valMinus - Addition constants */
1170 /*------------------------------------------------------------------*/
1172 valMinus (value * lval, value * rval)
1176 /* create a new value */
1178 val->type = val->etype = newLink ();
1179 val->type->class = SPECIFIER;
1180 SPEC_NOUN (val->type) = (IS_FLOAT (lval->etype) ||
1181 IS_FLOAT (rval->etype) ? V_FLOAT : V_INT);
1182 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1183 SPEC_USIGN (val->type) =
1184 SPEC_USIGN (lval->etype) &&
1185 SPEC_USIGN (rval->etype) &&
1186 (floatFromVal(lval)-floatFromVal(rval))>=0;
1188 SPEC_LONG (val->type) = (SPEC_LONG (lval->etype) | SPEC_LONG (rval->etype));
1190 if (IS_FLOAT (val->type))
1191 SPEC_CVAL (val->type).v_float = floatFromVal (lval) - floatFromVal (rval);
1194 if (SPEC_LONG (val->type))
1196 if (SPEC_USIGN (val->type)) {
1197 SPEC_CVAL (val->type).v_ulong =
1198 (unsigned long) floatFromVal (lval) -
1199 (unsigned long) floatFromVal (rval);
1201 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) -
1202 (long) floatFromVal (rval);
1207 if (SPEC_USIGN (val->type)) {
1208 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) -
1209 (unsigned) floatFromVal (rval);
1211 SPEC_CVAL (val->type).v_int = (int) floatFromVal (lval) -
1212 (int) floatFromVal (rval);
1216 return cheapestVal(val);
1219 /*------------------------------------------------------------------*/
1220 /* valShift - Shift left or right */
1221 /*------------------------------------------------------------------*/
1223 valShift (value * lval, value * rval, int lr)
1227 /* create a new value */
1229 val->type = val->etype = newIntLink ();
1230 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1231 SPEC_USIGN (val->type) = (SPEC_USIGN (lval->etype) & SPEC_USIGN (rval->etype));
1232 SPEC_LONG (val->type) = 1;
1234 if (SPEC_LONG (val->type))
1236 if (SPEC_USIGN (val->type))
1237 SPEC_CVAL (val->type).v_ulong = lr ?
1238 (unsigned long) floatFromVal (lval) << (unsigned long) floatFromVal (rval) : \
1239 (unsigned long) floatFromVal (lval) >> (unsigned long) floatFromVal (rval);
1241 SPEC_CVAL (val->type).v_long = lr ?
1242 (long) floatFromVal (lval) << (long) floatFromVal (rval) : \
1243 (long) floatFromVal (lval) >> (long) floatFromVal (rval);
1246 return cheapestVal(val);
1249 /*------------------------------------------------------------------*/
1250 /* valCompare- Compares two literal */
1251 /*------------------------------------------------------------------*/
1253 valCompare (value * lval, value * rval, int ctype)
1257 /* create a new value */
1259 val->type = val->etype = newCharLink ();
1260 val->type->class = SPECIFIER;
1261 SPEC_NOUN (val->type) = V_CHAR; /* type is char */
1262 SPEC_USIGN (val->type) = 1;
1263 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1268 SPEC_CVAL (val->type).v_int = floatFromVal (lval) < floatFromVal (rval);
1272 SPEC_CVAL (val->type).v_int = floatFromVal (lval) > floatFromVal (rval);
1276 SPEC_CVAL (val->type).v_int = floatFromVal (lval) <= floatFromVal (rval);
1280 SPEC_CVAL (val->type).v_int = floatFromVal (lval) >= floatFromVal (rval);
1284 SPEC_CVAL (val->type).v_int = floatFromVal (lval) == floatFromVal (rval);
1288 SPEC_CVAL (val->type).v_int = floatFromVal (lval) != floatFromVal (rval);
1296 /*------------------------------------------------------------------*/
1297 /* valBitwise - Bitwise operation */
1298 /*------------------------------------------------------------------*/
1300 valBitwise (value * lval, value * rval, int op)
1304 /* create a new value */
1306 val->type = copyLinkChain (lval->type);
1307 val->etype = getSpec (val->type);
1312 if (SPEC_LONG (val->type))
1314 if (SPEC_USIGN (val->type))
1315 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) &
1316 (unsigned long) floatFromVal (rval);
1318 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) &
1319 (long) floatFromVal (rval);
1323 if (SPEC_USIGN (val->type))
1324 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) &
1325 (unsigned) floatFromVal (rval);
1327 SPEC_CVAL (val->type).v_int = (int) floatFromVal (lval) & (int) floatFromVal (rval);
1332 if (SPEC_LONG (val->type))
1334 if (SPEC_USIGN (val->type))
1335 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) |
1336 (unsigned long) floatFromVal (rval);
1338 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) |
1339 (long) floatFromVal (rval);
1343 if (SPEC_USIGN (val->type))
1344 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) |
1345 (unsigned) floatFromVal (rval);
1347 SPEC_CVAL (val->type).v_int =
1348 (int) floatFromVal (lval) | (int) floatFromVal (rval);
1354 if (SPEC_LONG (val->type))
1356 if (SPEC_USIGN (val->type))
1357 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) ^
1358 (unsigned long) floatFromVal (rval);
1360 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) ^
1361 (long) floatFromVal (rval);
1365 if (SPEC_USIGN (val->type))
1366 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) ^
1367 (unsigned) floatFromVal (rval);
1369 SPEC_CVAL (val->type).v_int =
1370 (int) floatFromVal (lval) ^ (int) floatFromVal (rval);
1375 return cheapestVal(val);
1378 /*------------------------------------------------------------------*/
1379 /* valAndOr - Generates code for and / or operation */
1380 /*------------------------------------------------------------------*/
1382 valLogicAndOr (value * lval, value * rval, int op)
1386 /* create a new value */
1388 val->type = val->etype = newCharLink ();
1389 val->type->class = SPECIFIER;
1390 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1391 SPEC_USIGN (val->type) = 0;
1396 SPEC_CVAL (val->type).v_int = floatFromVal (lval) && floatFromVal (rval);
1400 SPEC_CVAL (val->type).v_int = floatFromVal (lval) || floatFromVal (rval);
1408 /*------------------------------------------------------------------*/
1409 /* valCastLiteral - casts a literal value to another type */
1410 /*------------------------------------------------------------------*/
1412 valCastLiteral (sym_link * dtype, double fval)
1420 val->etype = getSpec (val->type = copyLinkChain (dtype));
1421 SPEC_SCLS (val->etype) = S_LITERAL;
1422 /* if it is not a specifier then we can assume that */
1423 /* it will be an unsigned long */
1424 if (!IS_SPEC (val->type)) {
1425 SPEC_CVAL (val->etype).v_ulong = (unsigned long) fval;
1429 if (SPEC_NOUN (val->etype) == V_FLOAT)
1430 SPEC_CVAL (val->etype).v_float = fval;
1432 unsigned long l = fval;
1433 if (SPEC_LONG (val->etype)) {
1434 if (SPEC_USIGN (val->etype))
1435 SPEC_CVAL (val->etype).v_ulong = (unsigned long) l;
1437 SPEC_CVAL (val->etype).v_long = (long) l;
1439 if (SPEC_USIGN (val->etype))
1440 SPEC_CVAL (val->etype).v_uint = (unsigned short)l;
1442 SPEC_CVAL (val->etype).v_int = (short)l;
1448 /*------------------------------------------------------------------*/
1449 /* getNelements - determines # of elements from init list */
1450 /*------------------------------------------------------------------*/
1452 getNelements (sym_link * type, initList * ilist)
1454 sym_link *etype = getSpec (type);
1460 while (ilist->type == INIT_DEEP)
1461 ilist = ilist->init.deep;
1463 /* if type is a character array and there is only one
1464 (string) initialiser then get the length of the string */
1465 if (IS_ARRAY (type) && IS_CHAR (etype) && !ilist->next)
1467 ast *iast = ilist->init.node;
1468 value *v = (iast->type == EX_VALUE ? iast->opval.val : NULL);
1471 werror (E_CONST_EXPECTED);
1475 if (IS_ARRAY (v->type) && IS_CHAR (v->etype))
1476 // yep, it's a string
1478 return DCL_ELEM (v->type);
1486 ilist = ilist->next;
1492 /*-----------------------------------------------------------------*/
1493 /* valForArray - returns a value with name of array index */
1494 /*-----------------------------------------------------------------*/
1496 valForArray (ast * arrExpr)
1498 value *val, *lval = NULL;
1500 int size = getSize (arrExpr->left->ftype->next);
1501 /* if the right or left is an array
1503 if (IS_AST_OP (arrExpr->left))
1505 if (arrExpr->left->opval.op == '[')
1506 lval = valForArray (arrExpr->left);
1507 else if (arrExpr->left->opval.op == '.')
1508 lval = valForStructElem (arrExpr->left->left,
1509 arrExpr->left->right);
1510 else if (arrExpr->left->opval.op == PTR_OP &&
1511 IS_ADDRESS_OF_OP (arrExpr->left->left))
1512 lval = valForStructElem (arrExpr->left->left->left,
1513 arrExpr->left->right);
1518 else if (!IS_AST_SYM_VALUE (arrExpr->left))
1521 if (!IS_AST_LIT_VALUE (arrExpr->right))
1526 sprintf (buffer, "%s", AST_SYMBOL (arrExpr->left)->rname);
1528 sprintf (buffer, "%s", lval->name);
1530 sprintf (val->name, "(%s + %d)", buffer,
1531 (int) AST_LIT_VALUE (arrExpr->right) * size);
1533 val->type = newLink ();
1534 if (SPEC_SCLS (arrExpr->left->etype) == S_CODE)
1536 DCL_TYPE (val->type) = CPOINTER;
1537 DCL_PTR_CONST (val->type) = port->mem.code_ro;
1539 else if (SPEC_SCLS (arrExpr->left->etype) == S_XDATA)
1540 DCL_TYPE (val->type) = FPOINTER;
1541 else if (SPEC_SCLS (arrExpr->left->etype) == S_XSTACK)
1542 DCL_TYPE (val->type) = PPOINTER;
1543 else if (SPEC_SCLS (arrExpr->left->etype) == S_IDATA)
1544 DCL_TYPE (val->type) = IPOINTER;
1545 else if (SPEC_SCLS (arrExpr->left->etype) == S_EEPROM)
1546 DCL_TYPE (val->type) = EEPPOINTER;
1548 DCL_TYPE (val->type) = POINTER;
1549 val->type->next = arrExpr->left->ftype;
1550 val->etype = getSpec (val->type);
1554 /*-----------------------------------------------------------------*/
1555 /* valForStructElem - returns value with name of struct element */
1556 /*-----------------------------------------------------------------*/
1558 valForStructElem (ast * structT, ast * elemT)
1560 value *val, *lval = NULL;
1564 /* left could be furthur derefed */
1565 if (IS_AST_OP (structT))
1567 if (structT->opval.op == '[')
1568 lval = valForArray (structT);
1569 else if (structT->opval.op == '.')
1570 lval = valForStructElem (structT->left, structT->right);
1571 else if (structT->opval.op == PTR_OP &&
1572 IS_ADDRESS_OF_OP (structT->left))
1573 lval = valForStructElem (structT->left->left,
1579 if (!IS_AST_SYM_VALUE (elemT))
1582 if (!IS_STRUCT (structT->etype))
1585 if ((sym = getStructElement (SPEC_STRUCT (structT->etype),
1586 AST_SYMBOL (elemT))) == NULL)
1593 sprintf (buffer, "%s", AST_SYMBOL (structT)->rname);
1595 sprintf (buffer, "%s", lval->name);
1597 sprintf (val->name, "(%s + %d)", buffer,
1600 val->type = newLink ();
1601 if (SPEC_SCLS (structT->etype) == S_CODE)
1603 DCL_TYPE (val->type) = CPOINTER;
1604 DCL_PTR_CONST (val->type) = port->mem.code_ro;
1606 else if (SPEC_SCLS (structT->etype) == S_XDATA)
1607 DCL_TYPE (val->type) = FPOINTER;
1608 else if (SPEC_SCLS (structT->etype) == S_XSTACK)
1609 DCL_TYPE (val->type) = PPOINTER;
1610 else if (SPEC_SCLS (structT->etype) == S_IDATA)
1611 DCL_TYPE (val->type) = IPOINTER;
1612 else if (SPEC_SCLS (structT->etype) == S_EEPROM)
1613 DCL_TYPE (val->type) = EEPPOINTER;
1615 DCL_TYPE (val->type) = POINTER;
1616 val->type->next = sym->type;
1617 val->etype = getSpec (val->type);
1621 /*-----------------------------------------------------------------*/
1622 /* valForCastAggr - will return value for a cast of an aggregate */
1623 /* plus minus a constant */
1624 /*-----------------------------------------------------------------*/
1626 valForCastAggr (ast * aexpr, sym_link * type, ast * cnst, int op)
1630 if (!IS_AST_SYM_VALUE (aexpr))
1632 if (!IS_AST_LIT_VALUE (cnst))
1637 sprintf (val->name, "(%s %c %d)",
1638 AST_SYMBOL (aexpr)->rname, op,
1639 getSize (type->next) * (int) AST_LIT_VALUE (cnst));
1642 val->etype = getSpec (val->type);
1646 /*-----------------------------------------------------------------*/
1647 /* valForCastAggr - will return value for a cast of an aggregate */
1648 /* with no constant */
1649 /*-----------------------------------------------------------------*/
1651 valForCastArr (ast * aexpr, sym_link * type)
1655 if (!IS_AST_SYM_VALUE (aexpr))
1660 sprintf (val->name, "(%s)",
1661 AST_SYMBOL (aexpr)->rname);
1664 val->etype = getSpec (val->type);