1 /* Perform arithmetic and other operations on values, for GDB.
3 Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
28 #include "expression.h"
31 #include "gdb_string.h"
35 /* Define whether or not the C operator '/' truncates towards zero for
36 differently signed operands (truncation direction is undefined in C). */
38 #ifndef TRUNCATION_TOWARDS_ZERO
39 #define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2)
42 static struct value *value_subscripted_rvalue (struct value *, struct value *, int);
44 void _initialize_valarith (void);
47 /* Given a pointer, return the size of its target.
48 If the pointer type is void *, then return 1.
49 If the target type is incomplete, then error out.
50 This isn't a general purpose function, but just a
51 helper for value_sub & value_add.
55 find_size_for_pointer_math (struct type *ptr_type)
58 struct type *ptr_target;
60 ptr_target = check_typedef (TYPE_TARGET_TYPE (ptr_type));
62 sz = TYPE_LENGTH (ptr_target);
65 if (TYPE_CODE (ptr_type) == TYPE_CODE_VOID)
71 name = TYPE_NAME (ptr_target);
73 name = TYPE_TAG_NAME (ptr_target);
75 error ("Cannot perform pointer math on incomplete types, "
76 "try casting to a known type, or void *.");
78 error ("Cannot perform pointer math on incomplete type \"%s\", "
79 "try casting to a known type, or void *.", name);
86 value_add (struct value *arg1, struct value *arg2)
91 struct type *type1, *type2, *valptrtype;
95 type1 = check_typedef (VALUE_TYPE (arg1));
96 type2 = check_typedef (VALUE_TYPE (arg2));
98 if ((TYPE_CODE (type1) == TYPE_CODE_PTR
99 || TYPE_CODE (type2) == TYPE_CODE_PTR)
101 (TYPE_CODE (type1) == TYPE_CODE_INT
102 || TYPE_CODE (type2) == TYPE_CODE_INT))
103 /* Exactly one argument is a pointer, and one is an integer. */
105 struct value *retval;
107 if (TYPE_CODE (type1) == TYPE_CODE_PTR)
120 sz = find_size_for_pointer_math (valptrtype);
122 retval = value_from_pointer (valptrtype,
123 value_as_address (valptr)
124 + (sz * value_as_long (valint)));
125 VALUE_BFD_SECTION (retval) = VALUE_BFD_SECTION (valptr);
129 return value_binop (arg1, arg2, BINOP_ADD);
133 value_sub (struct value *arg1, struct value *arg2)
135 struct type *type1, *type2;
136 COERCE_NUMBER (arg1);
137 COERCE_NUMBER (arg2);
138 type1 = check_typedef (VALUE_TYPE (arg1));
139 type2 = check_typedef (VALUE_TYPE (arg2));
141 if (TYPE_CODE (type1) == TYPE_CODE_PTR)
143 if (TYPE_CODE (type2) == TYPE_CODE_INT)
145 /* pointer - integer. */
146 LONGEST sz = find_size_for_pointer_math (type1);
148 return value_from_pointer (type1,
149 (value_as_address (arg1)
150 - (sz * value_as_long (arg2))));
152 else if (TYPE_CODE (type2) == TYPE_CODE_PTR
153 && TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type1)))
154 == TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type2))))
156 /* pointer to <type x> - pointer to <type x>. */
157 LONGEST sz = TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type1)));
158 return value_from_longest
159 (builtin_type_long, /* FIXME -- should be ptrdiff_t */
160 (value_as_long (arg1) - value_as_long (arg2)) / sz);
165 First argument of `-' is a pointer and second argument is neither\n\
166 an integer nor a pointer of the same type.");
170 return value_binop (arg1, arg2, BINOP_SUB);
173 /* Return the value of ARRAY[IDX].
174 See comments in value_coerce_array() for rationale for reason for
175 doing lower bounds adjustment here rather than there.
176 FIXME: Perhaps we should validate that the index is valid and if
177 verbosity is set, warn about invalid indices (but still use them). */
180 value_subscript (struct value *array, struct value *idx)
183 int c_style = current_language->c_style_arrays;
187 tarray = check_typedef (VALUE_TYPE (array));
188 COERCE_VARYING_ARRAY (array, tarray);
190 if (TYPE_CODE (tarray) == TYPE_CODE_ARRAY
191 || TYPE_CODE (tarray) == TYPE_CODE_STRING)
193 struct type *range_type = TYPE_INDEX_TYPE (tarray);
194 LONGEST lowerbound, upperbound;
195 get_discrete_bounds (range_type, &lowerbound, &upperbound);
197 if (VALUE_LVAL (array) != lval_memory)
198 return value_subscripted_rvalue (array, idx, lowerbound);
202 LONGEST index = value_as_long (idx);
203 if (index >= lowerbound && index <= upperbound)
204 return value_subscripted_rvalue (array, idx, lowerbound);
205 warning ("array or string index out of range");
206 /* fall doing C stuff */
212 bound = value_from_longest (builtin_type_int, (LONGEST) lowerbound);
213 idx = value_sub (idx, bound);
216 array = value_coerce_array (array);
219 if (TYPE_CODE (tarray) == TYPE_CODE_BITSTRING)
221 struct type *range_type = TYPE_INDEX_TYPE (tarray);
222 LONGEST index = value_as_long (idx);
224 int offset, byte, bit_index;
225 LONGEST lowerbound, upperbound;
226 get_discrete_bounds (range_type, &lowerbound, &upperbound);
227 if (index < lowerbound || index > upperbound)
228 error ("bitstring index out of range");
230 offset = index / TARGET_CHAR_BIT;
231 byte = *((char *) VALUE_CONTENTS (array) + offset);
232 bit_index = index % TARGET_CHAR_BIT;
233 byte >>= (BITS_BIG_ENDIAN ? TARGET_CHAR_BIT - 1 - bit_index : bit_index);
234 v = value_from_longest (LA_BOOL_TYPE, byte & 1);
235 VALUE_BITPOS (v) = bit_index;
236 VALUE_BITSIZE (v) = 1;
237 VALUE_LVAL (v) = VALUE_LVAL (array);
238 if (VALUE_LVAL (array) == lval_internalvar)
239 VALUE_LVAL (v) = lval_internalvar_component;
240 VALUE_ADDRESS (v) = VALUE_ADDRESS (array);
241 VALUE_OFFSET (v) = offset + VALUE_OFFSET (array);
246 return value_ind (value_add (array, idx));
248 error ("not an array or string");
251 /* Return the value of EXPR[IDX], expr an aggregate rvalue
252 (eg, a vector register). This routine used to promote floats
253 to doubles, but no longer does. */
255 static struct value *
256 value_subscripted_rvalue (struct value *array, struct value *idx, int lowerbound)
258 struct type *array_type = check_typedef (VALUE_TYPE (array));
259 struct type *elt_type = check_typedef (TYPE_TARGET_TYPE (array_type));
260 unsigned int elt_size = TYPE_LENGTH (elt_type);
261 LONGEST index = value_as_long (idx);
262 unsigned int elt_offs = elt_size * longest_to_int (index - lowerbound);
265 if (index < lowerbound || elt_offs >= TYPE_LENGTH (array_type))
266 error ("no such vector element");
268 v = allocate_value (elt_type);
269 if (VALUE_LAZY (array))
272 memcpy (VALUE_CONTENTS (v), VALUE_CONTENTS (array) + elt_offs, elt_size);
274 if (VALUE_LVAL (array) == lval_internalvar)
275 VALUE_LVAL (v) = lval_internalvar_component;
277 VALUE_LVAL (v) = VALUE_LVAL (array);
278 VALUE_ADDRESS (v) = VALUE_ADDRESS (array);
279 VALUE_OFFSET (v) = VALUE_OFFSET (array) + elt_offs;
283 /* Check to see if either argument is a structure. This is called so
284 we know whether to go ahead with the normal binop or look for a
285 user defined function instead.
287 For now, we do not overload the `=' operator. */
290 binop_user_defined_p (enum exp_opcode op, struct value *arg1, struct value *arg2)
292 struct type *type1, *type2;
293 if (op == BINOP_ASSIGN || op == BINOP_CONCAT)
295 type1 = check_typedef (VALUE_TYPE (arg1));
296 type2 = check_typedef (VALUE_TYPE (arg2));
297 return (TYPE_CODE (type1) == TYPE_CODE_STRUCT
298 || TYPE_CODE (type2) == TYPE_CODE_STRUCT
299 || (TYPE_CODE (type1) == TYPE_CODE_REF
300 && TYPE_CODE (TYPE_TARGET_TYPE (type1)) == TYPE_CODE_STRUCT)
301 || (TYPE_CODE (type2) == TYPE_CODE_REF
302 && TYPE_CODE (TYPE_TARGET_TYPE (type2)) == TYPE_CODE_STRUCT));
305 /* Check to see if argument is a structure. This is called so
306 we know whether to go ahead with the normal unop or look for a
307 user defined function instead.
309 For now, we do not overload the `&' operator. */
312 unop_user_defined_p (enum exp_opcode op, struct value *arg1)
317 type1 = check_typedef (VALUE_TYPE (arg1));
320 if (TYPE_CODE (type1) == TYPE_CODE_STRUCT)
322 else if (TYPE_CODE (type1) == TYPE_CODE_REF)
323 type1 = TYPE_TARGET_TYPE (type1);
329 /* We know either arg1 or arg2 is a structure, so try to find the right
330 user defined function. Create an argument vector that calls
331 arg1.operator @ (arg1,arg2) and return that value (where '@' is any
332 binary operator which is legal for GNU C++).
334 OP is the operatore, and if it is BINOP_ASSIGN_MODIFY, then OTHEROP
335 is the opcode saying how to modify it. Otherwise, OTHEROP is
339 value_x_binop (struct value *arg1, struct value *arg2, enum exp_opcode op,
340 enum exp_opcode otherop, enum noside noside)
342 struct value **argvec;
352 /* now we know that what we have to do is construct our
353 arg vector and find the right function to call it with. */
355 if (TYPE_CODE (check_typedef (VALUE_TYPE (arg1))) != TYPE_CODE_STRUCT)
356 error ("Can't do that binary op on that type"); /* FIXME be explicit */
358 argvec = (struct value **) alloca (sizeof (struct value *) * 4);
359 argvec[1] = value_addr (arg1);
363 /* make the right function name up */
364 strcpy (tstr, "operator__");
389 case BINOP_BITWISE_AND:
392 case BINOP_BITWISE_IOR:
395 case BINOP_BITWISE_XOR:
398 case BINOP_LOGICAL_AND:
401 case BINOP_LOGICAL_OR:
413 case BINOP_ASSIGN_MODIFY:
431 case BINOP_BITWISE_AND:
434 case BINOP_BITWISE_IOR:
437 case BINOP_BITWISE_XOR:
440 case BINOP_MOD: /* invalid */
442 error ("Invalid binary operation specified.");
445 case BINOP_SUBSCRIPT:
466 case BINOP_MOD: /* invalid */
468 error ("Invalid binary operation specified.");
471 argvec[0] = value_struct_elt (&arg1, argvec + 1, tstr, &static_memfuncp, "structure");
477 argvec[1] = argvec[0];
480 if (noside == EVAL_AVOID_SIDE_EFFECTS)
482 struct type *return_type;
484 = TYPE_TARGET_TYPE (check_typedef (VALUE_TYPE (argvec[0])));
485 return value_zero (return_type, VALUE_LVAL (arg1));
487 return call_function_by_hand (argvec[0], 2 - static_memfuncp, argvec + 1);
489 error ("member function %s not found", tstr);
491 return call_function_by_hand (argvec[0], 2 - static_memfuncp, argvec + 1);
495 /* We know that arg1 is a structure, so try to find a unary user
496 defined operator that matches the operator in question.
497 Create an argument vector that calls arg1.operator @ (arg1)
498 and return that value (where '@' is (almost) any unary operator which
499 is legal for GNU C++). */
502 value_x_unop (struct value *arg1, enum exp_opcode op, enum noside noside)
504 struct value **argvec;
505 char *ptr, *mangle_ptr;
506 char tstr[13], mangle_tstr[13];
507 int static_memfuncp, nargs;
512 /* now we know that what we have to do is construct our
513 arg vector and find the right function to call it with. */
515 if (TYPE_CODE (check_typedef (VALUE_TYPE (arg1))) != TYPE_CODE_STRUCT)
516 error ("Can't do that unary op on that type"); /* FIXME be explicit */
518 argvec = (struct value **) alloca (sizeof (struct value *) * 4);
519 argvec[1] = value_addr (arg1);
524 /* make the right function name up */
525 strcpy (tstr, "operator__");
527 strcpy (mangle_tstr, "__");
528 mangle_ptr = mangle_tstr + 2;
531 case UNOP_PREINCREMENT:
534 case UNOP_PREDECREMENT:
537 case UNOP_POSTINCREMENT:
539 argvec[2] = value_from_longest (builtin_type_int, 0);
543 case UNOP_POSTDECREMENT:
545 argvec[2] = value_from_longest (builtin_type_int, 0);
549 case UNOP_LOGICAL_NOT:
552 case UNOP_COMPLEMENT:
562 error ("Invalid unary operation specified.");
565 argvec[0] = value_struct_elt (&arg1, argvec + 1, tstr, &static_memfuncp, "structure");
571 argvec[1] = argvec[0];
575 if (noside == EVAL_AVOID_SIDE_EFFECTS)
577 struct type *return_type;
579 = TYPE_TARGET_TYPE (check_typedef (VALUE_TYPE (argvec[0])));
580 return value_zero (return_type, VALUE_LVAL (arg1));
582 return call_function_by_hand (argvec[0], nargs, argvec + 1);
584 error ("member function %s not found", tstr);
585 return 0; /* For lint -- never reached */
589 /* Concatenate two values with the following conditions:
591 (1) Both values must be either bitstring values or character string
592 values and the resulting value consists of the concatenation of
593 ARG1 followed by ARG2.
597 One value must be an integer value and the other value must be
598 either a bitstring value or character string value, which is
599 to be repeated by the number of times specified by the integer
603 (2) Boolean values are also allowed and are treated as bit string
606 (3) Character values are also allowed and are treated as character
607 string values of length 1.
611 value_concat (struct value *arg1, struct value *arg2)
613 struct value *inval1;
614 struct value *inval2;
615 struct value *outval = NULL;
616 int inval1len, inval2len;
620 struct type *type1 = check_typedef (VALUE_TYPE (arg1));
621 struct type *type2 = check_typedef (VALUE_TYPE (arg2));
623 COERCE_VARYING_ARRAY (arg1, type1);
624 COERCE_VARYING_ARRAY (arg2, type2);
626 /* First figure out if we are dealing with two values to be concatenated
627 or a repeat count and a value to be repeated. INVAL1 is set to the
628 first of two concatenated values, or the repeat count. INVAL2 is set
629 to the second of the two concatenated values or the value to be
632 if (TYPE_CODE (type2) == TYPE_CODE_INT)
634 struct type *tmp = type1;
646 /* Now process the input values. */
648 if (TYPE_CODE (type1) == TYPE_CODE_INT)
650 /* We have a repeat count. Validate the second value and then
651 construct a value repeated that many times. */
652 if (TYPE_CODE (type2) == TYPE_CODE_STRING
653 || TYPE_CODE (type2) == TYPE_CODE_CHAR)
655 count = longest_to_int (value_as_long (inval1));
656 inval2len = TYPE_LENGTH (type2);
657 ptr = (char *) alloca (count * inval2len);
658 if (TYPE_CODE (type2) == TYPE_CODE_CHAR)
660 inchar = (char) unpack_long (type2,
661 VALUE_CONTENTS (inval2));
662 for (idx = 0; idx < count; idx++)
664 *(ptr + idx) = inchar;
669 for (idx = 0; idx < count; idx++)
671 memcpy (ptr + (idx * inval2len), VALUE_CONTENTS (inval2),
675 outval = value_string (ptr, count * inval2len);
677 else if (TYPE_CODE (type2) == TYPE_CODE_BITSTRING
678 || TYPE_CODE (type2) == TYPE_CODE_BOOL)
680 error ("unimplemented support for bitstring/boolean repeats");
684 error ("can't repeat values of that type");
687 else if (TYPE_CODE (type1) == TYPE_CODE_STRING
688 || TYPE_CODE (type1) == TYPE_CODE_CHAR)
690 /* We have two character strings to concatenate. */
691 if (TYPE_CODE (type2) != TYPE_CODE_STRING
692 && TYPE_CODE (type2) != TYPE_CODE_CHAR)
694 error ("Strings can only be concatenated with other strings.");
696 inval1len = TYPE_LENGTH (type1);
697 inval2len = TYPE_LENGTH (type2);
698 ptr = (char *) alloca (inval1len + inval2len);
699 if (TYPE_CODE (type1) == TYPE_CODE_CHAR)
701 *ptr = (char) unpack_long (type1, VALUE_CONTENTS (inval1));
705 memcpy (ptr, VALUE_CONTENTS (inval1), inval1len);
707 if (TYPE_CODE (type2) == TYPE_CODE_CHAR)
710 (char) unpack_long (type2, VALUE_CONTENTS (inval2));
714 memcpy (ptr + inval1len, VALUE_CONTENTS (inval2), inval2len);
716 outval = value_string (ptr, inval1len + inval2len);
718 else if (TYPE_CODE (type1) == TYPE_CODE_BITSTRING
719 || TYPE_CODE (type1) == TYPE_CODE_BOOL)
721 /* We have two bitstrings to concatenate. */
722 if (TYPE_CODE (type2) != TYPE_CODE_BITSTRING
723 && TYPE_CODE (type2) != TYPE_CODE_BOOL)
725 error ("Bitstrings or booleans can only be concatenated with other bitstrings or booleans.");
727 error ("unimplemented support for bitstring/boolean concatenation.");
731 /* We don't know how to concatenate these operands. */
732 error ("illegal operands for concatenation.");
739 /* Perform a binary operation on two operands which have reasonable
740 representations as integers or floats. This includes booleans,
741 characters, integers, or floats.
742 Does not support addition and subtraction on pointers;
743 use value_add or value_sub if you want to handle those possibilities. */
746 value_binop (struct value *arg1, struct value *arg2, enum exp_opcode op)
749 struct type *type1, *type2;
755 type1 = check_typedef (VALUE_TYPE (arg1));
756 type2 = check_typedef (VALUE_TYPE (arg2));
758 if ((TYPE_CODE (type1) != TYPE_CODE_FLT
759 && TYPE_CODE (type1) != TYPE_CODE_CHAR
760 && TYPE_CODE (type1) != TYPE_CODE_INT
761 && TYPE_CODE (type1) != TYPE_CODE_BOOL
762 && TYPE_CODE (type1) != TYPE_CODE_RANGE)
764 (TYPE_CODE (type2) != TYPE_CODE_FLT
765 && TYPE_CODE (type2) != TYPE_CODE_CHAR
766 && TYPE_CODE (type2) != TYPE_CODE_INT
767 && TYPE_CODE (type2) != TYPE_CODE_BOOL
768 && TYPE_CODE (type2) != TYPE_CODE_RANGE))
769 error ("Argument to arithmetic operation not a number or boolean.");
771 if (TYPE_CODE (type1) == TYPE_CODE_FLT
773 TYPE_CODE (type2) == TYPE_CODE_FLT)
775 /* FIXME-if-picky-about-floating-accuracy: Should be doing this
776 in target format. real.c in GCC probably has the necessary
778 DOUBLEST v1, v2, v = 0;
779 v1 = value_as_double (arg1);
780 v2 = value_as_double (arg2);
802 error ("Cannot perform exponentiation: %s", safe_strerror (errno));
806 error ("Integer-only operation on floating point number.");
809 /* If either arg was long double, make sure that value is also long
812 if (TYPE_LENGTH (type1) * 8 > TARGET_DOUBLE_BIT
813 || TYPE_LENGTH (type2) * 8 > TARGET_DOUBLE_BIT)
814 val = allocate_value (builtin_type_long_double);
816 val = allocate_value (builtin_type_double);
818 store_typed_floating (VALUE_CONTENTS_RAW (val), VALUE_TYPE (val), v);
820 else if (TYPE_CODE (type1) == TYPE_CODE_BOOL
822 TYPE_CODE (type2) == TYPE_CODE_BOOL)
824 LONGEST v1, v2, v = 0;
825 v1 = value_as_long (arg1);
826 v2 = value_as_long (arg2);
830 case BINOP_BITWISE_AND:
834 case BINOP_BITWISE_IOR:
838 case BINOP_BITWISE_XOR:
851 error ("Invalid operation on booleans.");
854 val = allocate_value (type1);
855 store_signed_integer (VALUE_CONTENTS_RAW (val),
860 /* Integral operations here. */
861 /* FIXME: Also mixed integral/booleans, with result an integer. */
862 /* FIXME: This implements ANSI C rules (also correct for C++).
863 What about FORTRAN and (the deleted) chill ? */
865 unsigned int promoted_len1 = TYPE_LENGTH (type1);
866 unsigned int promoted_len2 = TYPE_LENGTH (type2);
867 int is_unsigned1 = TYPE_UNSIGNED (type1);
868 int is_unsigned2 = TYPE_UNSIGNED (type2);
869 unsigned int result_len;
870 int unsigned_operation;
872 /* Determine type length and signedness after promotion for
874 if (promoted_len1 < TYPE_LENGTH (builtin_type_int))
877 promoted_len1 = TYPE_LENGTH (builtin_type_int);
879 if (promoted_len2 < TYPE_LENGTH (builtin_type_int))
882 promoted_len2 = TYPE_LENGTH (builtin_type_int);
885 /* Determine type length of the result, and if the operation should
887 Use the signedness of the operand with the greater length.
888 If both operands are of equal length, use unsigned operation
889 if one of the operands is unsigned. */
890 if (promoted_len1 > promoted_len2)
892 unsigned_operation = is_unsigned1;
893 result_len = promoted_len1;
895 else if (promoted_len2 > promoted_len1)
897 unsigned_operation = is_unsigned2;
898 result_len = promoted_len2;
902 unsigned_operation = is_unsigned1 || is_unsigned2;
903 result_len = promoted_len1;
906 if (unsigned_operation)
908 ULONGEST v1, v2, v = 0;
909 v1 = (ULONGEST) value_as_long (arg1);
910 v2 = (ULONGEST) value_as_long (arg2);
912 /* Truncate values to the type length of the result. */
913 if (result_len < sizeof (ULONGEST))
915 v1 &= ((LONGEST) 1 << HOST_CHAR_BIT * result_len) - 1;
916 v2 &= ((LONGEST) 1 << HOST_CHAR_BIT * result_len) - 1;
940 error ("Cannot perform exponentiation: %s", safe_strerror (errno));
948 /* Knuth 1.2.4, integer only. Note that unlike the C '%' op,
949 v1 mod 0 has a defined value, v1. */
957 /* Note floor(v1/v2) == v1/v2 for unsigned. */
970 case BINOP_BITWISE_AND:
974 case BINOP_BITWISE_IOR:
978 case BINOP_BITWISE_XOR:
982 case BINOP_LOGICAL_AND:
986 case BINOP_LOGICAL_OR:
991 v = v1 < v2 ? v1 : v2;
995 v = v1 > v2 ? v1 : v2;
1002 case BINOP_NOTEQUAL:
1011 error ("Invalid binary operation on numbers.");
1014 /* This is a kludge to get around the fact that we don't
1015 know how to determine the result type from the types of
1016 the operands. (I'm not really sure how much we feel the
1017 need to duplicate the exact rules of the current
1018 language. They can get really hairy. But not to do so
1019 makes it hard to document just what we *do* do). */
1021 /* Can't just call init_type because we wouldn't know what
1022 name to give the type. */
1023 val = allocate_value
1024 (result_len > TARGET_LONG_BIT / HOST_CHAR_BIT
1025 ? builtin_type_unsigned_long_long
1026 : builtin_type_unsigned_long);
1027 store_unsigned_integer (VALUE_CONTENTS_RAW (val),
1028 TYPE_LENGTH (VALUE_TYPE (val)),
1033 LONGEST v1, v2, v = 0;
1034 v1 = value_as_long (arg1);
1035 v2 = value_as_long (arg2);
1058 error ("Cannot perform exponentiation: %s", safe_strerror (errno));
1066 /* Knuth 1.2.4, integer only. Note that unlike the C '%' op,
1067 X mod 0 has a defined value, X. */
1075 /* Compute floor. */
1076 if (TRUNCATION_TOWARDS_ZERO && (v < 0) && ((v1 % v2) != 0))
1092 case BINOP_BITWISE_AND:
1096 case BINOP_BITWISE_IOR:
1100 case BINOP_BITWISE_XOR:
1104 case BINOP_LOGICAL_AND:
1108 case BINOP_LOGICAL_OR:
1113 v = v1 < v2 ? v1 : v2;
1117 v = v1 > v2 ? v1 : v2;
1129 error ("Invalid binary operation on numbers.");
1132 /* This is a kludge to get around the fact that we don't
1133 know how to determine the result type from the types of
1134 the operands. (I'm not really sure how much we feel the
1135 need to duplicate the exact rules of the current
1136 language. They can get really hairy. But not to do so
1137 makes it hard to document just what we *do* do). */
1139 /* Can't just call init_type because we wouldn't know what
1140 name to give the type. */
1141 val = allocate_value
1142 (result_len > TARGET_LONG_BIT / HOST_CHAR_BIT
1143 ? builtin_type_long_long
1144 : builtin_type_long);
1145 store_signed_integer (VALUE_CONTENTS_RAW (val),
1146 TYPE_LENGTH (VALUE_TYPE (val)),
1154 /* Simulate the C operator ! -- return 1 if ARG1 contains zero. */
1157 value_logical_not (struct value *arg1)
1163 COERCE_NUMBER (arg1);
1164 type1 = check_typedef (VALUE_TYPE (arg1));
1166 if (TYPE_CODE (type1) == TYPE_CODE_FLT)
1167 return 0 == value_as_double (arg1);
1169 len = TYPE_LENGTH (type1);
1170 p = VALUE_CONTENTS (arg1);
1181 /* Perform a comparison on two string values (whose content are not
1182 necessarily null terminated) based on their length */
1185 value_strcmp (struct value *arg1, struct value *arg2)
1187 int len1 = TYPE_LENGTH (VALUE_TYPE (arg1));
1188 int len2 = TYPE_LENGTH (VALUE_TYPE (arg2));
1189 char *s1 = VALUE_CONTENTS (arg1);
1190 char *s2 = VALUE_CONTENTS (arg2);
1191 int i, len = len1 < len2 ? len1 : len2;
1193 for (i = 0; i < len; i++)
1197 else if (s1[i] > s2[i])
1205 else if (len1 > len2)
1211 /* Simulate the C operator == by returning a 1
1212 iff ARG1 and ARG2 have equal contents. */
1215 value_equal (struct value *arg1, struct value *arg2)
1218 register char *p1, *p2;
1219 struct type *type1, *type2;
1220 enum type_code code1;
1221 enum type_code code2;
1223 COERCE_NUMBER (arg1);
1224 COERCE_NUMBER (arg2);
1226 type1 = check_typedef (VALUE_TYPE (arg1));
1227 type2 = check_typedef (VALUE_TYPE (arg2));
1228 code1 = TYPE_CODE (type1);
1229 code2 = TYPE_CODE (type2);
1231 if ((code1 == TYPE_CODE_INT || code1 == TYPE_CODE_BOOL) &&
1232 (code2 == TYPE_CODE_INT || code2 == TYPE_CODE_BOOL))
1233 return longest_to_int (value_as_long (value_binop (arg1, arg2,
1235 else if ((code1 == TYPE_CODE_FLT || code1 == TYPE_CODE_INT || code1 == TYPE_CODE_BOOL)
1236 && (code2 == TYPE_CODE_FLT || code2 == TYPE_CODE_INT || code2 == TYPE_CODE_BOOL))
1237 return value_as_double (arg1) == value_as_double (arg2);
1239 /* FIXME: Need to promote to either CORE_ADDR or LONGEST, whichever
1241 else if (code1 == TYPE_CODE_PTR && (code2 == TYPE_CODE_INT || code2 == TYPE_CODE_BOOL))
1242 return value_as_address (arg1) == (CORE_ADDR) value_as_long (arg2);
1243 else if (code2 == TYPE_CODE_PTR && (code1 == TYPE_CODE_INT || code1 == TYPE_CODE_BOOL))
1244 return (CORE_ADDR) value_as_long (arg1) == value_as_address (arg2);
1246 else if (code1 == code2
1247 && ((len = (int) TYPE_LENGTH (type1))
1248 == (int) TYPE_LENGTH (type2)))
1250 p1 = VALUE_CONTENTS (arg1);
1251 p2 = VALUE_CONTENTS (arg2);
1259 else if (code1 == TYPE_CODE_STRING && code2 == TYPE_CODE_STRING)
1261 return value_strcmp (arg1, arg2) == 0;
1265 error ("Invalid type combination in equality test.");
1266 return 0; /* For lint -- never reached */
1270 /* Simulate the C operator < by returning 1
1271 iff ARG1's contents are less than ARG2's. */
1274 value_less (struct value *arg1, struct value *arg2)
1276 register enum type_code code1;
1277 register enum type_code code2;
1278 struct type *type1, *type2;
1280 COERCE_NUMBER (arg1);
1281 COERCE_NUMBER (arg2);
1283 type1 = check_typedef (VALUE_TYPE (arg1));
1284 type2 = check_typedef (VALUE_TYPE (arg2));
1285 code1 = TYPE_CODE (type1);
1286 code2 = TYPE_CODE (type2);
1288 if ((code1 == TYPE_CODE_INT || code1 == TYPE_CODE_BOOL) &&
1289 (code2 == TYPE_CODE_INT || code2 == TYPE_CODE_BOOL))
1290 return longest_to_int (value_as_long (value_binop (arg1, arg2,
1292 else if ((code1 == TYPE_CODE_FLT || code1 == TYPE_CODE_INT || code1 == TYPE_CODE_BOOL)
1293 && (code2 == TYPE_CODE_FLT || code2 == TYPE_CODE_INT || code2 == TYPE_CODE_BOOL))
1294 return value_as_double (arg1) < value_as_double (arg2);
1295 else if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_PTR)
1296 return value_as_address (arg1) < value_as_address (arg2);
1298 /* FIXME: Need to promote to either CORE_ADDR or LONGEST, whichever
1300 else if (code1 == TYPE_CODE_PTR && (code2 == TYPE_CODE_INT || code2 == TYPE_CODE_BOOL))
1301 return value_as_address (arg1) < (CORE_ADDR) value_as_long (arg2);
1302 else if (code2 == TYPE_CODE_PTR && (code1 == TYPE_CODE_INT || code1 == TYPE_CODE_BOOL))
1303 return (CORE_ADDR) value_as_long (arg1) < value_as_address (arg2);
1304 else if (code1 == TYPE_CODE_STRING && code2 == TYPE_CODE_STRING)
1305 return value_strcmp (arg1, arg2) < 0;
1308 error ("Invalid type combination in ordering comparison.");
1313 /* The unary operators - and ~. Both free the argument ARG1. */
1316 value_neg (struct value *arg1)
1318 register struct type *type;
1319 register struct type *result_type = VALUE_TYPE (arg1);
1324 type = check_typedef (VALUE_TYPE (arg1));
1326 if (TYPE_CODE (type) == TYPE_CODE_FLT)
1327 return value_from_double (result_type, -value_as_double (arg1));
1328 else if (TYPE_CODE (type) == TYPE_CODE_INT || TYPE_CODE (type) == TYPE_CODE_BOOL)
1330 /* Perform integral promotion for ANSI C/C++. FIXME: What about
1331 FORTRAN and (the deleted) chill ? */
1332 if (TYPE_LENGTH (type) < TYPE_LENGTH (builtin_type_int))
1333 result_type = builtin_type_int;
1335 return value_from_longest (result_type, -value_as_long (arg1));
1339 error ("Argument to negate operation not a number.");
1340 return 0; /* For lint -- never reached */
1345 value_complement (struct value *arg1)
1347 register struct type *type;
1348 register struct type *result_type = VALUE_TYPE (arg1);
1354 type = check_typedef (VALUE_TYPE (arg1));
1356 typecode = TYPE_CODE (type);
1357 if ((typecode != TYPE_CODE_INT) && (typecode != TYPE_CODE_BOOL))
1358 error ("Argument to complement operation not an integer or boolean.");
1360 /* Perform integral promotion for ANSI C/C++.
1361 FIXME: What about FORTRAN ? */
1362 if (TYPE_LENGTH (type) < TYPE_LENGTH (builtin_type_int))
1363 result_type = builtin_type_int;
1365 return value_from_longest (result_type, ~value_as_long (arg1));
1368 /* The INDEX'th bit of SET value whose VALUE_TYPE is TYPE,
1369 and whose VALUE_CONTENTS is valaddr.
1370 Return -1 if out of range, -2 other error. */
1373 value_bit_index (struct type *type, char *valaddr, int index)
1375 LONGEST low_bound, high_bound;
1378 struct type *range = TYPE_FIELD_TYPE (type, 0);
1379 if (get_discrete_bounds (range, &low_bound, &high_bound) < 0)
1381 if (index < low_bound || index > high_bound)
1383 rel_index = index - low_bound;
1384 word = unpack_long (builtin_type_unsigned_char,
1385 valaddr + (rel_index / TARGET_CHAR_BIT));
1386 rel_index %= TARGET_CHAR_BIT;
1387 if (BITS_BIG_ENDIAN)
1388 rel_index = TARGET_CHAR_BIT - 1 - rel_index;
1389 return (word >> rel_index) & 1;
1393 value_in (struct value *element, struct value *set)
1396 struct type *settype = check_typedef (VALUE_TYPE (set));
1397 struct type *eltype = check_typedef (VALUE_TYPE (element));
1398 if (TYPE_CODE (eltype) == TYPE_CODE_RANGE)
1399 eltype = TYPE_TARGET_TYPE (eltype);
1400 if (TYPE_CODE (settype) != TYPE_CODE_SET)
1401 error ("Second argument of 'IN' has wrong type");
1402 if (TYPE_CODE (eltype) != TYPE_CODE_INT
1403 && TYPE_CODE (eltype) != TYPE_CODE_CHAR
1404 && TYPE_CODE (eltype) != TYPE_CODE_ENUM
1405 && TYPE_CODE (eltype) != TYPE_CODE_BOOL)
1406 error ("First argument of 'IN' has wrong type");
1407 member = value_bit_index (settype, VALUE_CONTENTS (set),
1408 value_as_long (element));
1410 error ("First argument of 'IN' not in range");
1411 return value_from_longest (LA_BOOL_TYPE, member);
1415 _initialize_valarith (void)