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 = mylineno;
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);
308 SNPRINTF (val->name, sizeof(val->name), "%s", sym->rname);
312 SNPRINTF (val->name, sizeof(val->name), "_%s", sym->name);
318 #if defined(REDUCE_LITERALS)
319 /*--------------------------------------------------------------------*/
320 /* cheapestVal - convert a val to the cheapest as possible value */
321 /*--------------------------------------------------------------------*/
322 static value *cheapestVal (value *val) {
326 if (IS_FLOAT(val->type) || IS_CHAR(val->type))
329 if (SPEC_LONG(val->type)) {
330 if (SPEC_USIGN(val->type)) {
331 uval=SPEC_CVAL(val->type).v_ulong;
333 sval=SPEC_CVAL(val->type).v_long;
336 if (SPEC_USIGN(val->type)) {
337 uval=SPEC_CVAL(val->type).v_uint;
339 sval=SPEC_CVAL(val->type).v_int;
343 if (SPEC_USIGN(val->type)) {
345 SPEC_LONG(val->type)=0;
346 SPEC_CVAL(val->type).v_uint = (TYPE_UWORD)uval;
348 SPEC_NOUN(val->type)=V_CHAR;
351 } else { // not unsigned
354 SPEC_LONG(val->type)=0;
355 SPEC_CVAL(val->type).v_int = (TYPE_WORD)sval;
357 SPEC_NOUN(val->type)=V_CHAR;
362 SPEC_LONG(val->type)=0;
363 SPEC_CVAL(val->type).v_int = (TYPE_WORD)sval;
365 SPEC_NOUN(val->type)=V_CHAR;
375 static value *cheapestVal (value *val)
377 /* - signed/unsigned must not be changed.
378 - long must not be changed.
380 the only possible reduction is from signed int to signed char,
381 because it's automatically promoted back to signed int.
383 a reduction from unsigned int to unsigned char is a bug,
384 because an _unsigned_ char is promoted to _signed_ int! */
385 if (IS_INT(val->type) &&
386 !SPEC_USIGN(val->type) &&
387 !SPEC_LONG(val->type) &&
388 SPEC_CVAL(val->type).v_int >= -128 &&
389 SPEC_CVAL(val->type).v_int <= 127)
392 SPEC_NOUN(val->type) = V_CHAR;
394 /* this could be too aggressive:
395 'unsigned char' promotes to 'signed int', so that we can
396 reduce it the other way */
397 if (IS_INT(val->type) &&
398 !SPEC_USIGN(val->type) &&
399 !SPEC_LONG(val->type) &&
400 SPEC_CVAL(val->type).v_int >= 128 &&
401 SPEC_CVAL(val->type).v_int <= 255)
404 SPEC_NOUN(val->type) = V_CHAR;
405 SPEC_USIGN(val->type) = 1;
411 /*-----------------------------------------------------------------*/
412 /* valueFromLit - creates a value from a literal */
413 /*-----------------------------------------------------------------*/
415 valueFromLit (double lit)
419 if ((((TYPE_DWORD) lit) - lit) == 0)
421 SNPRINTF (buffer, sizeof(buffer), "%d", (TYPE_DWORD) lit);
422 return constVal (buffer);
425 SNPRINTF (buffer, sizeof(buffer), "%f", lit);
426 return constFloatVal (buffer);
429 /*-----------------------------------------------------------------*/
430 /* constFloatVal - converts a FLOAT constant to value */
431 /*-----------------------------------------------------------------*/
433 constFloatVal (char *s)
435 value *val = newValue ();
438 if (sscanf (s, "%lf", &sval) != 1)
440 werror (E_INVALID_FLOAT_CONST, s);
441 return constVal ("0");
444 val->type = val->etype = newLink (SPECIFIER);
445 SPEC_NOUN (val->type) = V_FLOAT;
446 SPEC_SCLS (val->type) = S_LITERAL;
447 SPEC_CVAL (val->type).v_float = sval;
452 /*-----------------------------------------------------------------*/
453 /* constVal - converts an INTEGER constant into a cheapest value */
454 /*-----------------------------------------------------------------*/
455 value *constVal (char *s)
458 short hex = 0, octal = 0;
463 val = newValue (); /* alloc space for value */
465 val->type = val->etype = newLink (SPECIFIER); /* create the spcifier */
466 SPEC_SCLS (val->type) = S_LITERAL;
467 // let's start with a signed char
468 SPEC_NOUN (val->type) = V_CHAR;
469 SPEC_USIGN (val->type) = 0;
471 hex = ((strchr (s, 'x') || strchr (s, 'X')) ? 1 : 0);
473 /* set the octal flag */
474 if (!hex && *s == '0' && *(s + 1))
477 /* create the scan string */
478 scanFmt[scI++] = '%';
480 scanFmt[scI++] = 'l';
483 scanFmt[scI++] = 'o';
485 scanFmt[scI++] = 'x';
487 scanFmt[scI++] = 'f';
489 scanFmt[scI++] = '\0';
493 sscanf (s, scanFmt, &sval);
496 sscanf (s, scanFmt, &dval);
499 /* Setup the flags first */
500 /* set the _long flag if 'lL' is found */
501 if (strchr (s, 'l') || strchr (s, 'L')) {
502 SPEC_NOUN (val->type) = V_INT;
503 SPEC_LONG (val->type) = 1;
506 /* set the unsigned flag if 'uU' is found */
507 if (strchr (s, 'u') || strchr (s, 'U')) {
508 SPEC_USIGN (val->type) = 1;
511 if (dval<0) { // "-28u" will still be signed and negative
512 if (dval<-128) { // check if we have to promote to int
513 SPEC_NOUN (val->type) = V_INT;
515 if (dval<-32768) { // check if we have to promote to long int
516 SPEC_LONG (val->type) = 1;
519 if (dval>0xff || /* check if we have to promote to int */
520 SPEC_USIGN (val->type)) { /* if it's unsigned, we can't use unsigned
521 char. After an integral promotion it will
522 be a signed int; this certainly isn't what
523 the programer wants */
524 SPEC_NOUN (val->type) = V_INT;
526 else if (dval>0x7f && !SPEC_USIGN (val->type)) { // check if we have to promote to int
528 if ((hex || octal) && /* hex or octal constants may be stored in unsigned type */
530 SPEC_USIGN (val->type) = 1;
532 SPEC_NOUN (val->type) = V_INT;
535 /* this is quite agressive: 'unsigned char' will be promoted to 'signed int',
536 so that the signedness of a char shouldn't matter */
537 SPEC_USIGN (val->type) = 1;
540 if (dval>0xffff && SPEC_USIGN (val->type)) { // check if we have to promote to long
541 SPEC_LONG (val->type) = 1;
543 else if (dval>0x7fff && !SPEC_USIGN (val->type)) { // check if we have to promote to long int
544 if ((hex || octal) && /* hex or octal constants may be stored in unsigned type */
546 SPEC_USIGN (val->type) = 1;
548 SPEC_LONG (val->type) = 1;
549 if (dval>0x7fffffff) {
550 SPEC_USIGN (val->type) = 1;
556 if (SPEC_LONG (val->type))
558 if (SPEC_USIGN (val->type))
560 SPEC_CVAL (val->type).v_ulong = (TYPE_UDWORD)dval;
564 SPEC_CVAL (val->type).v_long = (TYPE_DWORD)dval;
569 if (SPEC_USIGN (val->type))
571 SPEC_CVAL (val->type).v_uint = (TYPE_UWORD)dval;
575 SPEC_CVAL (val->type).v_int = (TYPE_WORD)dval;
582 /*! /fn char hexEscape(char **src)
584 /param src Pointer to 'x' from start of hex character value
587 unsigned char hexEscape(char **src)
590 unsigned long value ;
592 (*src)++ ; /* Skip over the 'x' */
593 s = *src ; /* Save for error detection */
595 value = strtol (*src, src, 16);
598 // no valid hex found
599 werror(E_INVALID_HEX);
602 werror(W_ESC_SEQ_OOR_FOR_CHAR);
608 /*------------------------------------------------------------------*/
609 /* octalEscape - process an octal constant of max three digits */
610 /* return the octal value, throw a warning for illegal octal */
611 /* adjust src to point at the last proccesed char */
612 /*------------------------------------------------------------------*/
614 unsigned char octalEscape (char **str) {
618 for (digits=0; digits<3; digits++) {
619 if (**str>='0' && **str<='7') {
620 value = value*8 + (**str-'0');
627 if (value > 255 /* || (**str>='0' && **str<='7') */ ) {
628 werror (W_ESC_SEQ_OOR_FOR_CHAR);
635 /fn int copyStr (char *dest, char *src)
637 Copies a source string to a dest buffer interpreting escape sequences
638 and special characters
640 /param dest Buffer to receive the resultant string
641 /param src Buffer containing the source string with escape sequecnes
642 /return Number of characters in output string
647 copyStr (char *dest, char *src)
650 char *OriginalDest = dest ;
656 else if (*src == '\\')
691 *dest++ = octalEscape(&src);
696 *dest++ = hexEscape(&src) ;
723 return dest - OriginalDest ;
726 /*------------------------------------------------------------------*/
727 /* strVal - converts a string constant to a value */
728 /*------------------------------------------------------------------*/
734 val = newValue (); /* get a new one */
736 /* get a declarator */
737 val->type = newLink (DECLARATOR);
738 DCL_TYPE (val->type) = ARRAY;
739 val->type->next = val->etype = newLink (SPECIFIER);
740 SPEC_NOUN (val->etype) = V_CHAR;
741 SPEC_SCLS (val->etype) = S_LITERAL;
743 SPEC_CVAL (val->etype).v_char = Safe_alloc (strlen (s) + 1);
744 DCL_ELEM (val->type) = copyStr (SPEC_CVAL (val->etype).v_char, s);
750 /*------------------------------------------------------------------*/
751 /* reverseValWithType - reverses value chain with type & etype */
752 /*------------------------------------------------------------------*/
754 reverseValWithType (value * val)
762 /* save the type * etype chains */
766 /* set the current one 2b null */
767 val->type = val->etype = NULL;
768 val = reverseVal (val);
770 /* restore type & etype */
777 /*------------------------------------------------------------------*/
778 /* reverseVal - reverses the values for a value chain */
779 /*------------------------------------------------------------------*/
781 reverseVal (value * val)
783 value *prev, *curr, *next;
798 val->next = (void *) NULL;
802 /*------------------------------------------------------------------*/
803 /* copyValueChain - will copy a chain of values */
804 /*------------------------------------------------------------------*/
806 copyValueChain (value * src)
813 dest = copyValue (src);
814 dest->next = copyValueChain (src->next);
819 /*------------------------------------------------------------------*/
820 /* copyValue - copies contents of a value to a fresh one */
821 /*------------------------------------------------------------------*/
823 copyValue (value * src)
828 dest->sym = copySymbol (src->sym);
829 strncpyz (dest->name, src->name, SDCC_NAME_MAX);
830 dest->type = (src->type ? copyLinkChain (src->type) : NULL);
831 dest->etype = (src->type ? getSpec (dest->type) : NULL);
836 /*------------------------------------------------------------------*/
837 /* charVal - converts a character constant to a value */
838 /*------------------------------------------------------------------*/
846 val->type = val->etype = newLink (SPECIFIER);
847 SPEC_NOUN (val->type) = V_CHAR;
848 SPEC_USIGN(val->type) = 1;
849 SPEC_SCLS (val->type) = S_LITERAL;
851 s++; /* get rid of quotation */
852 /* if \ then special processing */
855 s++; /* go beyond the backslash */
859 SPEC_CVAL (val->type).v_uint = '\n';
862 SPEC_CVAL (val->type).v_uint = '\t';
865 SPEC_CVAL (val->type).v_uint = '\v';
868 SPEC_CVAL (val->type).v_uint = '\b';
871 SPEC_CVAL (val->type).v_uint = '\r';
874 SPEC_CVAL (val->type).v_uint = '\f';
877 SPEC_CVAL (val->type).v_uint = '\a';
880 SPEC_CVAL (val->type).v_uint = '\\';
883 SPEC_CVAL (val->type).v_uint = '\?';
886 SPEC_CVAL (val->type).v_uint = '\'';
889 SPEC_CVAL (val->type).v_uint = '\"';
900 SPEC_CVAL (val->type).v_uint = octalEscape(&s);
904 SPEC_CVAL (val->type).v_uint = hexEscape(&s) ;
908 SPEC_CVAL (val->type).v_uint = (unsigned char)*s;
912 else /* not a backslash */
913 SPEC_CVAL (val->type).v_uint = (unsigned char)*s;
918 /*------------------------------------------------------------------*/
919 /* valFromType - creates a value from type given */
920 /*------------------------------------------------------------------*/
922 valFromType (sym_link * type)
924 value *val = newValue ();
925 val->type = copyLinkChain (type);
926 val->etype = getSpec (val->type);
930 /*------------------------------------------------------------------*/
931 /* floatFromVal - value to double float conversion */
932 /*------------------------------------------------------------------*/
934 floatFromVal (value * val)
939 if (val->etype && SPEC_SCLS (val->etype) != S_LITERAL)
941 werror (E_CONST_EXPECTED, val->name);
945 /* if it is not a specifier then we can assume that */
946 /* it will be an unsigned long */
947 if (!IS_SPEC (val->type))
948 return (double) SPEC_CVAL (val->etype).v_ulong;
950 if (SPEC_NOUN (val->etype) == V_FLOAT)
951 return (double) SPEC_CVAL (val->etype).v_float;
953 if (SPEC_LONG (val->etype))
955 if (SPEC_USIGN (val->etype))
956 return (double) SPEC_CVAL (val->etype).v_ulong;
958 return (double) SPEC_CVAL (val->etype).v_long;
961 if (SPEC_NOUN (val->etype) == V_INT) {
962 if (SPEC_USIGN (val->etype))
963 return (double) SPEC_CVAL (val->etype).v_uint;
965 return (double) SPEC_CVAL (val->etype).v_int;
968 if (SPEC_NOUN (val->etype) == V_CHAR) {
969 if (SPEC_USIGN (val->etype))
970 return (double) (unsigned char)SPEC_CVAL (val->etype).v_uint;
972 return (double) (signed char)SPEC_CVAL (val->etype).v_int;
975 if (IS_BITVAR(val->etype)) {
976 return (double) SPEC_CVAL (val->etype).v_uint;
979 if (SPEC_NOUN (val->etype) == V_VOID) {
980 return (double) SPEC_CVAL (val->etype).v_ulong;
984 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
985 "floatFromVal: unknown value");
989 /*------------------------------------------------------------------*/
990 /* valUnaryPM - does the unary +/- operation on a constant */
991 /*------------------------------------------------------------------*/
993 valUnaryPM (value * val)
995 /* depending on type */
996 if (SPEC_NOUN (val->etype) == V_FLOAT)
997 SPEC_CVAL (val->etype).v_float = -1.0 * SPEC_CVAL (val->etype).v_float;
1000 if (SPEC_LONG (val->etype))
1002 if (SPEC_USIGN (val->etype))
1003 SPEC_CVAL (val->etype).v_ulong = 0-SPEC_CVAL (val->etype).v_ulong;
1005 SPEC_CVAL (val->etype).v_long = -SPEC_CVAL (val->etype).v_long;
1009 if (SPEC_USIGN (val->etype))
1010 SPEC_CVAL (val->etype).v_uint = 0-SPEC_CVAL (val->etype).v_uint;
1012 SPEC_CVAL (val->etype).v_int = -SPEC_CVAL (val->etype).v_int;
1015 // -(unsigned 3) now really is signed
1016 SPEC_USIGN(val->etype)=0;
1017 // -(unsigned char)135 now really is an int
1018 if (SPEC_NOUN(val->etype) == V_CHAR) {
1019 if (SPEC_CVAL(val->etype).v_int < -128) {
1020 SPEC_NOUN(val->etype) = V_INT;
1026 /*------------------------------------------------------------------*/
1027 /* valueComplement - complements a constant */
1028 /*------------------------------------------------------------------*/
1030 valComplement (value * val)
1032 /* depending on type */
1033 if (SPEC_LONG (val->etype))
1035 if (SPEC_USIGN (val->etype))
1036 SPEC_CVAL (val->etype).v_ulong = ~SPEC_CVAL (val->etype).v_ulong;
1038 SPEC_CVAL (val->etype).v_long = ~SPEC_CVAL (val->etype).v_long;
1042 if (SPEC_USIGN (val->etype))
1043 SPEC_CVAL (val->etype).v_uint = ~SPEC_CVAL (val->etype).v_uint;
1045 SPEC_CVAL (val->etype).v_int = ~SPEC_CVAL (val->etype).v_int;
1047 // ~(unsigned 3) now really is signed
1048 SPEC_USIGN(val->etype)=0;
1052 /*------------------------------------------------------------------*/
1053 /* valueNot - complements a constant */
1054 /*------------------------------------------------------------------*/
1056 valNot (value * val)
1058 /* depending on type */
1059 if (SPEC_LONG (val->etype))
1061 if (SPEC_USIGN (val->etype))
1062 SPEC_CVAL (val->etype).v_ulong = !SPEC_CVAL (val->etype).v_ulong;
1064 SPEC_CVAL (val->etype).v_long = !SPEC_CVAL (val->etype).v_long;
1068 if (SPEC_USIGN (val->etype))
1069 SPEC_CVAL (val->etype).v_uint = !SPEC_CVAL (val->etype).v_uint;
1071 SPEC_CVAL (val->etype).v_int = !SPEC_CVAL (val->etype).v_int;
1076 /*------------------------------------------------------------------*/
1077 /* valMult - multiply constants */
1078 /*------------------------------------------------------------------*/
1080 valMult (value * lval, value * rval)
1084 /* create a new value */
1086 val->type = val->etype = newLink (SPECIFIER);
1087 SPEC_NOUN (val->type) = (IS_FLOAT (lval->etype) ||
1088 IS_FLOAT (rval->etype) ? V_FLOAT : V_INT);
1089 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1090 SPEC_LONG (val->type) = (SPEC_LONG (lval->etype) | SPEC_LONG (rval->etype));
1091 SPEC_USIGN (val->type) = SPEC_USIGN (computeType (lval->etype,
1094 if (IS_FLOAT (val->type))
1095 SPEC_CVAL (val->type).v_float = floatFromVal (lval) * floatFromVal (rval);
1096 /* signed and unsigned mul are the same, as long as the precision of the
1097 result isn't bigger than the precision of the operands. */
1098 else if (SPEC_LONG (val->type))
1099 SPEC_CVAL (val->type).v_ulong = (TYPE_UDWORD) floatFromVal (lval) *
1100 (TYPE_UDWORD) floatFromVal (rval);
1101 else if (SPEC_USIGN (val->type)) /* unsigned int */
1103 TYPE_UDWORD ul = (TYPE_UWORD) floatFromVal (lval) *
1104 (TYPE_UWORD) floatFromVal (rval);
1106 SPEC_CVAL (val->type).v_uint = (TYPE_UWORD) ul;
1107 if (ul != (TYPE_UWORD) ul)
1110 else /* signed int */
1112 TYPE_DWORD l = (TYPE_WORD) floatFromVal (lval) *
1113 (TYPE_WORD) floatFromVal (rval);
1115 SPEC_CVAL (val->type).v_int = (TYPE_WORD) l;
1116 if (l != (TYPE_WORD) l)
1119 return cheapestVal (val);
1122 /*------------------------------------------------------------------*/
1123 /* valDiv - Divide constants */
1124 /*------------------------------------------------------------------*/
1126 valDiv (value * lval, value * rval)
1130 if (floatFromVal (rval) == 0)
1132 werror (E_DIVIDE_BY_ZERO);
1136 /* create a new value */
1138 val->type = val->etype = newLink(SPECIFIER);
1139 SPEC_NOUN (val->type) = (IS_FLOAT (lval->etype) ||
1140 IS_FLOAT (rval->etype) ? V_FLOAT : V_INT);
1141 SPEC_SCLS (val->etype) = S_LITERAL;
1142 SPEC_LONG (val->type) = (SPEC_LONG (lval->etype) | SPEC_LONG (rval->etype));
1143 SPEC_USIGN (val->type) = SPEC_USIGN (computeType (lval->etype,
1147 if (IS_FLOAT (val->type))
1148 SPEC_CVAL (val->type).v_float = floatFromVal (lval) / floatFromVal (rval);
1149 else if (SPEC_LONG (val->type))
1151 if (SPEC_USIGN (val->type))
1152 SPEC_CVAL (val->type).v_ulong = (TYPE_UDWORD) floatFromVal (lval) /
1153 (TYPE_UDWORD) floatFromVal (rval);
1155 SPEC_CVAL (val->type).v_long = (TYPE_DWORD) floatFromVal (lval) /
1156 (TYPE_DWORD) floatFromVal (rval);
1160 if (SPEC_USIGN (val->type))
1161 SPEC_CVAL (val->type).v_uint = (TYPE_UWORD) floatFromVal (lval) /
1162 (TYPE_UWORD) floatFromVal (rval);
1164 SPEC_CVAL (val->type).v_int = (TYPE_WORD) floatFromVal (lval) /
1165 (TYPE_WORD) floatFromVal (rval);
1167 return cheapestVal (val);
1170 /*------------------------------------------------------------------*/
1171 /* valMod - Modulus constants */
1172 /*------------------------------------------------------------------*/
1174 valMod (value * lval, value * rval)
1178 /* create a new value */
1180 val->type = val->etype = newLink (SPECIFIER);
1181 SPEC_NOUN (val->type) = V_INT; /* type is int */
1182 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1183 SPEC_LONG (val->type) = (SPEC_LONG (lval->etype) | SPEC_LONG (rval->etype));
1184 SPEC_USIGN (val->type) = SPEC_USIGN (computeType (lval->etype,
1188 if (SPEC_LONG (val->type))
1190 if (SPEC_USIGN (val->type))
1191 SPEC_CVAL (val->type).v_ulong = (TYPE_UDWORD) floatFromVal (lval) %
1192 (TYPE_UDWORD) floatFromVal (rval);
1194 SPEC_CVAL (val->type).v_long = (TYPE_DWORD) floatFromVal (lval) %
1195 (TYPE_DWORD) floatFromVal (rval);
1199 if (SPEC_USIGN (val->type))
1200 SPEC_CVAL (val->type).v_uint = (TYPE_UWORD) floatFromVal (lval) %
1201 (TYPE_UWORD) floatFromVal (rval);
1203 SPEC_CVAL (val->type).v_int = (TYPE_WORD) floatFromVal (lval) %
1204 (TYPE_WORD) floatFromVal (rval);
1206 return cheapestVal (val);
1209 /*------------------------------------------------------------------*/
1210 /* valPlus - Addition constants */
1211 /*------------------------------------------------------------------*/
1213 valPlus (value * lval, value * rval)
1217 /* create a new value */
1219 val->type = val->etype = newLink (SPECIFIER);
1220 SPEC_NOUN (val->type) = (IS_FLOAT (lval->etype) ||
1221 IS_FLOAT (rval->etype) ? V_FLOAT : V_INT);
1222 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1223 SPEC_LONG (val->type) = (SPEC_LONG (lval->etype) | SPEC_LONG (rval->etype));
1224 SPEC_USIGN (val->type) = SPEC_USIGN (computeType (lval->etype,
1227 if (IS_FLOAT (val->type))
1228 SPEC_CVAL (val->type).v_float = floatFromVal (lval) + floatFromVal (rval);
1229 else if (SPEC_LONG (val->type))
1231 if (SPEC_USIGN (val->type))
1232 SPEC_CVAL (val->type).v_ulong = (TYPE_UDWORD) floatFromVal (lval) +
1233 (TYPE_UDWORD) floatFromVal (rval);
1235 SPEC_CVAL (val->type).v_long = (TYPE_DWORD) floatFromVal (lval) +
1236 (TYPE_DWORD) floatFromVal (rval);
1240 if (SPEC_USIGN (val->type))
1241 SPEC_CVAL (val->type).v_uint = (TYPE_UWORD) floatFromVal (lval) +
1242 (TYPE_UWORD) floatFromVal (rval);
1244 SPEC_CVAL (val->type).v_int = (TYPE_WORD) floatFromVal (lval) +
1245 (TYPE_WORD) floatFromVal (rval);
1247 return cheapestVal (val);
1250 /*------------------------------------------------------------------*/
1251 /* valMinus - Addition constants */
1252 /*------------------------------------------------------------------*/
1254 valMinus (value * lval, value * rval)
1258 /* create a new value */
1260 val->type = val->etype = newLink (SPECIFIER);
1261 SPEC_NOUN (val->type) = (IS_FLOAT (lval->etype) ||
1262 IS_FLOAT (rval->etype) ? V_FLOAT : V_INT);
1263 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1264 SPEC_LONG (val->type) = (SPEC_LONG (lval->etype) | SPEC_LONG (rval->etype));
1265 SPEC_USIGN (val->type) = SPEC_USIGN (computeType (lval->etype,
1268 if (IS_FLOAT (val->type))
1269 SPEC_CVAL (val->type).v_float = floatFromVal (lval) - floatFromVal (rval);
1270 else if (SPEC_LONG (val->type))
1272 if (SPEC_USIGN (val->type))
1273 SPEC_CVAL (val->type).v_ulong = (TYPE_UDWORD) floatFromVal (lval) -
1274 (TYPE_UDWORD) floatFromVal (rval);
1276 SPEC_CVAL (val->type).v_long = (TYPE_DWORD) floatFromVal (lval) -
1277 (TYPE_DWORD) floatFromVal (rval);
1281 if (SPEC_USIGN (val->type))
1282 SPEC_CVAL (val->type).v_uint = (TYPE_UWORD) floatFromVal (lval) -
1283 (TYPE_UWORD) floatFromVal (rval);
1285 SPEC_CVAL (val->type).v_int = (TYPE_WORD) floatFromVal (lval) -
1286 (TYPE_WORD) floatFromVal (rval);
1288 return cheapestVal (val);
1291 /*------------------------------------------------------------------*/
1292 /* valShift - Shift left or right */
1293 /*------------------------------------------------------------------*/
1295 valShift (value * lval, value * rval, int lr)
1299 /* create a new value */
1301 val->type = val->etype = newIntLink ();
1302 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1303 SPEC_NOUN (val->etype) = V_INT;
1304 /* 'unsigned char' promotes to 'signed int' */
1305 if (!IS_CHAR (lval->etype))
1306 SPEC_USIGN (val->type) = SPEC_USIGN (lval->etype);
1307 SPEC_LONG (val->type) = SPEC_LONG (lval->etype);
1309 if (getSize (lval->type) * 8 <= (TYPE_UDWORD) floatFromVal (rval) &&
1312 /* right shift and unsigned */
1313 (!lr && SPEC_USIGN (rval->type))))
1315 werror (W_SHIFT_CHANGED, (lr ? "left" : "right"));
1318 if (SPEC_LONG (val->type))
1320 if (SPEC_USIGN (val->type))
1322 SPEC_CVAL (val->type).v_ulong = lr ?
1323 (TYPE_UDWORD) floatFromVal (lval) << (TYPE_UWORD) floatFromVal (rval) : \
1324 (TYPE_UDWORD) floatFromVal (lval) >> (TYPE_UWORD) floatFromVal (rval);
1328 SPEC_CVAL (val->type).v_long = lr ?
1329 (TYPE_DWORD) floatFromVal (lval) << (TYPE_UWORD) floatFromVal (rval) : \
1330 (TYPE_DWORD) floatFromVal (lval) >> (TYPE_UWORD) floatFromVal (rval);
1335 if (SPEC_USIGN (val->type))
1337 SPEC_CVAL (val->type).v_uint = lr ?
1338 (TYPE_UWORD) floatFromVal (lval) << (TYPE_UWORD) floatFromVal (rval) : \
1339 (TYPE_UWORD) floatFromVal (lval) >> (TYPE_UWORD) floatFromVal (rval);
1343 SPEC_CVAL (val->type).v_int = lr ?
1344 (TYPE_WORD) floatFromVal (lval) << (TYPE_UWORD) floatFromVal (rval) : \
1345 (TYPE_WORD) floatFromVal (lval) >> (TYPE_UWORD) floatFromVal (rval);
1348 return cheapestVal (val);
1351 /*------------------------------------------------------------------*/
1352 /* valCompare- Compares two literal */
1353 /*------------------------------------------------------------------*/
1355 valCompare (value * lval, value * rval, int ctype)
1359 /* create a new value */
1361 val->type = val->etype = newCharLink ();
1362 val->type->class = SPECIFIER;
1363 SPEC_NOUN (val->type) = V_CHAR; /* type is char */
1364 SPEC_USIGN (val->type) = 1;
1365 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1370 SPEC_CVAL (val->type).v_int = floatFromVal (lval) < floatFromVal (rval);
1374 SPEC_CVAL (val->type).v_int = floatFromVal (lval) > floatFromVal (rval);
1378 SPEC_CVAL (val->type).v_int = floatFromVal (lval) <= floatFromVal (rval);
1382 SPEC_CVAL (val->type).v_int = floatFromVal (lval) >= floatFromVal (rval);
1386 if (SPEC_NOUN(lval->type) == V_FLOAT ||
1387 SPEC_NOUN(rval->type) == V_FLOAT)
1389 SPEC_CVAL (val->type).v_int = floatFromVal (lval) == floatFromVal (rval);
1393 /* integrals: ignore signedness */
1396 l = (TYPE_UDWORD) floatFromVal (lval);
1397 r = (TYPE_UDWORD) floatFromVal (rval);
1398 /* In order to correctly compare 'signed int' and 'unsigned int' it's
1399 neccessary to strip them to 16 bit.
1400 Literals are reduced to their cheapest type, therefore left and
1401 right might have different types. It's neccessary to find a
1402 common type: int (used for char too) or long */
1403 if (!IS_LONG (lval->etype) &&
1404 !IS_LONG (rval->etype))
1409 SPEC_CVAL (val->type).v_int = l == r;
1413 if (SPEC_NOUN(lval->type) == V_FLOAT ||
1414 SPEC_NOUN(rval->type) == V_FLOAT)
1416 SPEC_CVAL (val->type).v_int = floatFromVal (lval) != floatFromVal (rval);
1420 /* integrals: ignore signedness */
1423 l = (TYPE_UDWORD) floatFromVal (lval);
1424 r = (TYPE_UDWORD) floatFromVal (rval);
1425 /* In order to correctly compare 'signed int' and 'unsigned int' it's
1426 neccessary to strip them to 16 bit.
1427 Literals are reduced to their cheapest type, therefore left and
1428 right might have different types. It's neccessary to find a
1429 common type: int (used for char too) or long */
1430 if (!IS_LONG (lval->etype) &&
1431 !IS_LONG (rval->etype))
1436 SPEC_CVAL (val->type).v_int = l != r;
1445 /*------------------------------------------------------------------*/
1446 /* valBitwise - Bitwise operation */
1447 /*------------------------------------------------------------------*/
1449 valBitwise (value * lval, value * rval, int op)
1453 /* create a new value */
1455 val->type = copyLinkChain (getSize(rval->type) > getSize(lval->type) ?
1456 rval->type : lval->type);
1457 val->etype = getSpec (val->type);
1462 if (SPEC_LONG (val->type))
1464 if (SPEC_USIGN (val->type))
1465 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) &
1466 (unsigned long) floatFromVal (rval);
1468 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) &
1469 (long) floatFromVal (rval);
1473 if (SPEC_USIGN (val->type))
1474 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) &
1475 (unsigned) floatFromVal (rval);
1477 SPEC_CVAL (val->type).v_int = (int) floatFromVal (lval) & (int) floatFromVal (rval);
1482 if (SPEC_LONG (val->type))
1484 if (SPEC_USIGN (val->type))
1485 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) |
1486 (unsigned long) floatFromVal (rval);
1488 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) |
1489 (long) floatFromVal (rval);
1493 if (SPEC_USIGN (val->type))
1494 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) |
1495 (unsigned) floatFromVal (rval);
1497 SPEC_CVAL (val->type).v_int =
1498 (int) floatFromVal (lval) | (int) floatFromVal (rval);
1504 if (SPEC_LONG (val->type))
1506 if (SPEC_USIGN (val->type))
1507 SPEC_CVAL (val->type).v_ulong = (unsigned long) floatFromVal (lval) ^
1508 (unsigned long) floatFromVal (rval);
1510 SPEC_CVAL (val->type).v_long = (long) floatFromVal (lval) ^
1511 (long) floatFromVal (rval);
1515 if (SPEC_USIGN (val->type))
1516 SPEC_CVAL (val->type).v_uint = (unsigned) floatFromVal (lval) ^
1517 (unsigned) floatFromVal (rval);
1519 SPEC_CVAL (val->type).v_int =
1520 (int) floatFromVal (lval) ^ (int) floatFromVal (rval);
1525 return cheapestVal(val);
1528 /*------------------------------------------------------------------*/
1529 /* valAndOr - Generates code for and / or operation */
1530 /*------------------------------------------------------------------*/
1532 valLogicAndOr (value * lval, value * rval, int op)
1536 /* create a new value */
1538 val->type = val->etype = newCharLink ();
1539 val->type->class = SPECIFIER;
1540 SPEC_SCLS (val->type) = S_LITERAL; /* will remain literal */
1541 SPEC_USIGN (val->type) = 0;
1546 SPEC_CVAL (val->type).v_int = floatFromVal (lval) && floatFromVal (rval);
1550 SPEC_CVAL (val->type).v_int = floatFromVal (lval) || floatFromVal (rval);
1558 /*------------------------------------------------------------------*/
1559 /* valCastLiteral - casts a literal value to another type */
1560 /*------------------------------------------------------------------*/
1562 valCastLiteral (sym_link * dtype, double fval)
1565 TYPE_UDWORD l = (TYPE_UDWORD)fval;
1571 val->etype = getSpec (val->type = copyLinkChain (dtype));
1572 SPEC_SCLS (val->etype) = S_LITERAL;
1574 /* if it is not a specifier then we can assume that */
1575 /* it will be an unsigned long */
1576 if (!IS_SPEC (val->type)) {
1577 SPEC_CVAL (val->etype).v_ulong = l;
1581 if (SPEC_NOUN (val->etype) == V_FLOAT)
1582 SPEC_CVAL (val->etype).v_float = fval;
1583 else if (SPEC_NOUN (val->etype) == V_CHAR) {
1584 if (SPEC_USIGN (val->etype))
1585 SPEC_CVAL (val->etype).v_uint= (TYPE_UBYTE) l;
1587 SPEC_CVAL (val->etype).v_int = (TYPE_BYTE) l;
1589 if (SPEC_LONG (val->etype)) {
1590 if (SPEC_USIGN (val->etype))
1591 SPEC_CVAL (val->etype).v_ulong = (TYPE_UDWORD) l;
1593 SPEC_CVAL (val->etype).v_long = (TYPE_DWORD) l;
1595 if (SPEC_USIGN (val->etype))
1596 SPEC_CVAL (val->etype).v_uint = (TYPE_UWORD)l;
1598 SPEC_CVAL (val->etype).v_int = (TYPE_WORD)l;
1604 /*------------------------------------------------------------------*/
1605 /* getNelements - determines # of elements from init list */
1606 /*------------------------------------------------------------------*/
1608 getNelements (sym_link * type, initList * ilist)
1615 if (ilist->type == INIT_DEEP)
1616 ilist = ilist->init.deep;
1618 /* if type is a character array and there is only one
1619 (string) initialiser then get the length of the string */
1620 if (IS_ARRAY (type) && IS_CHAR (type->next) && !ilist->next)
1622 ast *iast = ilist->init.node;
1623 value *v = (iast->type == EX_VALUE ? iast->opval.val : NULL);
1626 werror (E_CONST_EXPECTED);
1630 if (IS_ARRAY (v->type) && IS_CHAR (v->etype))
1631 // yep, it's a string
1633 return DCL_ELEM (v->type);
1641 ilist = ilist->next;
1646 /*-----------------------------------------------------------------*/
1647 /* valForArray - returns a value with name of array index */
1648 /*-----------------------------------------------------------------*/
1650 valForArray (ast * arrExpr)
1652 value *val, *lval = NULL;
1654 int size = getSize (arrExpr->left->ftype->next);
1655 /* if the right or left is an array
1657 if (IS_AST_OP (arrExpr->left))
1659 if (arrExpr->left->opval.op == '[')
1660 lval = valForArray (arrExpr->left);
1661 else if (arrExpr->left->opval.op == '.')
1662 lval = valForStructElem (arrExpr->left->left,
1663 arrExpr->left->right);
1664 else if (arrExpr->left->opval.op == PTR_OP &&
1665 IS_ADDRESS_OF_OP (arrExpr->left->left))
1666 lval = valForStructElem (arrExpr->left->left->left,
1667 arrExpr->left->right);
1672 else if (!IS_AST_SYM_VALUE (arrExpr->left))
1675 if (!IS_AST_LIT_VALUE (arrExpr->right))
1681 SNPRINTF (buffer, sizeof(buffer), "%s", AST_SYMBOL (arrExpr->left)->rname);
1685 SNPRINTF (buffer, sizeof(buffer), "%s", lval->name);
1688 SNPRINTF (val->name, sizeof(val->name), "(%s + %d)", buffer,
1689 (int) AST_LIT_VALUE (arrExpr->right) * size);
1691 val->type = newLink (DECLARATOR);
1692 if (SPEC_SCLS (arrExpr->left->etype) == S_CODE)
1693 DCL_TYPE (val->type) = CPOINTER;
1694 else if (SPEC_SCLS (arrExpr->left->etype) == S_XDATA)
1695 DCL_TYPE (val->type) = FPOINTER;
1696 else if (SPEC_SCLS (arrExpr->left->etype) == S_XSTACK)
1697 DCL_TYPE (val->type) = PPOINTER;
1698 else if (SPEC_SCLS (arrExpr->left->etype) == S_IDATA)
1699 DCL_TYPE (val->type) = IPOINTER;
1700 else if (SPEC_SCLS (arrExpr->left->etype) == S_EEPROM)
1701 DCL_TYPE (val->type) = EEPPOINTER;
1703 DCL_TYPE (val->type) = POINTER;
1704 val->type->next = arrExpr->left->ftype;
1705 val->etype = getSpec (val->type);
1709 /*-----------------------------------------------------------------*/
1710 /* valForStructElem - returns value with name of struct element */
1711 /*-----------------------------------------------------------------*/
1713 valForStructElem (ast * structT, ast * elemT)
1715 value *val, *lval = NULL;
1719 /* left could be furthur derefed */
1720 if (IS_AST_OP (structT))
1722 if (structT->opval.op == '[')
1723 lval = valForArray (structT);
1724 else if (structT->opval.op == '.')
1725 lval = valForStructElem (structT->left, structT->right);
1726 else if (structT->opval.op == PTR_OP &&
1727 IS_ADDRESS_OF_OP (structT->left))
1728 lval = valForStructElem (structT->left->left,
1734 if (!IS_AST_SYM_VALUE (elemT))
1737 if (!IS_STRUCT (structT->etype))
1740 if ((sym = getStructElement (SPEC_STRUCT (structT->etype),
1741 AST_SYMBOL (elemT))) == NULL)
1749 SNPRINTF(buffer, sizeof(buffer), "%s", AST_SYMBOL (structT)->rname);
1753 SNPRINTF (buffer, sizeof(buffer), "%s", lval->name);
1756 SNPRINTF (val->name, sizeof(val->name), "(%s + %d)", buffer,
1759 val->type = newLink (DECLARATOR);
1760 if (SPEC_SCLS (structT->etype) == S_CODE)
1761 DCL_TYPE (val->type) = CPOINTER;
1762 else if (SPEC_SCLS (structT->etype) == S_XDATA)
1763 DCL_TYPE (val->type) = FPOINTER;
1764 else if (SPEC_SCLS (structT->etype) == S_XSTACK)
1765 DCL_TYPE (val->type) = PPOINTER;
1766 else if (SPEC_SCLS (structT->etype) == S_IDATA)
1767 DCL_TYPE (val->type) = IPOINTER;
1768 else if (SPEC_SCLS (structT->etype) == S_EEPROM)
1769 DCL_TYPE (val->type) = EEPPOINTER;
1771 DCL_TYPE (val->type) = POINTER;
1772 val->type->next = sym->type;
1773 val->etype = getSpec (val->type);
1777 /*-----------------------------------------------------------------*/
1778 /* valForCastAggr - will return value for a cast of an aggregate */
1779 /* plus minus a constant */
1780 /*-----------------------------------------------------------------*/
1782 valForCastAggr (ast * aexpr, sym_link * type, ast * cnst, int op)
1786 if (!IS_AST_SYM_VALUE (aexpr))
1788 if (!IS_AST_LIT_VALUE (cnst))
1793 SNPRINTF (val->name, sizeof(val->name), "(%s %c %d)",
1794 AST_SYMBOL (aexpr)->rname, op,
1795 getSize (type->next) * (int) AST_LIT_VALUE (cnst));
1798 val->etype = getSpec (val->type);
1802 /*-----------------------------------------------------------------*/
1803 /* valForCastAggr - will return value for a cast of an aggregate */
1804 /* with no constant */
1805 /*-----------------------------------------------------------------*/
1807 valForCastArr (ast * aexpr, sym_link * type)
1811 if (!IS_AST_SYM_VALUE (aexpr))
1816 SNPRINTF (val->name, sizeof(val->name), "(%s)",
1817 AST_SYMBOL (aexpr)->rname);
1820 val->etype = getSpec (val->type);