1 /* Perform arithmetic and other operations on values, for GDB.
3 Copyright (C) 1986-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
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, see <http://www.gnu.org/licenses/>. */
24 #include "expression.h"
32 /* Define whether or not the C operator '/' truncates towards zero for
33 differently signed operands (truncation direction is undefined in C). */
35 #ifndef TRUNCATION_TOWARDS_ZERO
36 #define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2)
39 void _initialize_valarith (void);
42 /* Given a pointer, return the size of its target.
43 If the pointer type is void *, then return 1.
44 If the target type is incomplete, then error out.
45 This isn't a general purpose function, but just a
46 helper for value_ptradd. */
49 find_size_for_pointer_math (struct type
*ptr_type
)
52 struct type
*ptr_target
;
54 gdb_assert (TYPE_CODE (ptr_type
) == TYPE_CODE_PTR
);
55 ptr_target
= check_typedef (TYPE_TARGET_TYPE (ptr_type
));
57 sz
= type_length_units (ptr_target
);
60 if (TYPE_CODE (ptr_type
) == TYPE_CODE_VOID
)
66 name
= TYPE_NAME (ptr_target
);
68 name
= TYPE_TAG_NAME (ptr_target
);
70 error (_("Cannot perform pointer math on incomplete types, "
71 "try casting to a known type, or void *."));
73 error (_("Cannot perform pointer math on incomplete type \"%s\", "
74 "try casting to a known type, or void *."), name
);
80 /* Given a pointer ARG1 and an integral value ARG2, return the
81 result of C-style pointer arithmetic ARG1 + ARG2. */
84 value_ptradd (struct value
*arg1
, LONGEST arg2
)
86 struct type
*valptrtype
;
90 arg1
= coerce_array (arg1
);
91 valptrtype
= check_typedef (value_type (arg1
));
92 sz
= find_size_for_pointer_math (valptrtype
);
94 result
= value_from_pointer (valptrtype
,
95 value_as_address (arg1
) + sz
* arg2
);
96 if (VALUE_LVAL (result
) != lval_internalvar
)
97 set_value_component_location (result
, arg1
);
101 /* Given two compatible pointer values ARG1 and ARG2, return the
102 result of C-style pointer arithmetic ARG1 - ARG2. */
105 value_ptrdiff (struct value
*arg1
, struct value
*arg2
)
107 struct type
*type1
, *type2
;
110 arg1
= coerce_array (arg1
);
111 arg2
= coerce_array (arg2
);
112 type1
= check_typedef (value_type (arg1
));
113 type2
= check_typedef (value_type (arg2
));
115 gdb_assert (TYPE_CODE (type1
) == TYPE_CODE_PTR
);
116 gdb_assert (TYPE_CODE (type2
) == TYPE_CODE_PTR
);
118 if (TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type1
)))
119 != TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type2
))))
120 error (_("First argument of `-' is a pointer and "
121 "second argument is neither\n"
122 "an integer nor a pointer of the same type."));
124 sz
= type_length_units (check_typedef (TYPE_TARGET_TYPE (type1
)));
127 warning (_("Type size unknown, assuming 1. "
128 "Try casting to a known type, or void *."));
132 return (value_as_long (arg1
) - value_as_long (arg2
)) / sz
;
135 /* Return the value of ARRAY[IDX].
137 ARRAY may be of type TYPE_CODE_ARRAY or TYPE_CODE_STRING. If the
138 current language supports C-style arrays, it may also be TYPE_CODE_PTR.
140 See comments in value_coerce_array() for rationale for reason for
141 doing lower bounds adjustment here rather than there.
142 FIXME: Perhaps we should validate that the index is valid and if
143 verbosity is set, warn about invalid indices (but still use them). */
146 value_subscript (struct value
*array
, LONGEST index
)
148 int c_style
= current_language
->c_style_arrays
;
151 array
= coerce_ref (array
);
152 tarray
= check_typedef (value_type (array
));
154 if (TYPE_CODE (tarray
) == TYPE_CODE_ARRAY
155 || TYPE_CODE (tarray
) == TYPE_CODE_STRING
)
157 struct type
*range_type
= TYPE_INDEX_TYPE (tarray
);
158 LONGEST lowerbound
, upperbound
;
160 get_discrete_bounds (range_type
, &lowerbound
, &upperbound
);
161 if (VALUE_LVAL (array
) != lval_memory
)
162 return value_subscripted_rvalue (array
, index
, lowerbound
);
166 if (index
>= lowerbound
&& index
<= upperbound
)
167 return value_subscripted_rvalue (array
, index
, lowerbound
);
168 /* Emit warning unless we have an array of unknown size.
169 An array of unknown size has lowerbound 0 and upperbound -1. */
171 warning (_("array or string index out of range"));
172 /* fall doing C stuff */
177 array
= value_coerce_array (array
);
181 return value_ind (value_ptradd (array
, index
));
183 error (_("not an array or string"));
186 /* Return the value of EXPR[IDX], expr an aggregate rvalue
187 (eg, a vector register). This routine used to promote floats
188 to doubles, but no longer does. */
191 value_subscripted_rvalue (struct value
*array
, LONGEST index
, int lowerbound
)
193 struct type
*array_type
= check_typedef (value_type (array
));
194 struct type
*elt_type
= check_typedef (TYPE_TARGET_TYPE (array_type
));
195 unsigned int elt_size
= type_length_units (elt_type
);
196 unsigned int elt_offs
= elt_size
* longest_to_int (index
- lowerbound
);
199 if (index
< lowerbound
|| (!TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (array_type
)
200 && elt_offs
>= type_length_units (array_type
)))
201 error (_("no such vector element"));
203 if (VALUE_LVAL (array
) == lval_memory
&& value_lazy (array
))
204 v
= allocate_value_lazy (elt_type
);
207 v
= allocate_value (elt_type
);
208 value_contents_copy (v
, value_embedded_offset (v
),
209 array
, value_embedded_offset (array
) + elt_offs
,
213 set_value_component_location (v
, array
);
214 VALUE_REGNUM (v
) = VALUE_REGNUM (array
);
215 VALUE_FRAME_ID (v
) = VALUE_FRAME_ID (array
);
216 set_value_offset (v
, value_offset (array
) + elt_offs
);
221 /* Check to see if either argument is a structure, or a reference to
222 one. This is called so we know whether to go ahead with the normal
223 binop or look for a user defined function instead.
225 For now, we do not overload the `=' operator. */
228 binop_types_user_defined_p (enum exp_opcode op
,
229 struct type
*type1
, struct type
*type2
)
231 if (op
== BINOP_ASSIGN
|| op
== BINOP_CONCAT
)
234 type1
= check_typedef (type1
);
235 if (TYPE_CODE (type1
) == TYPE_CODE_REF
)
236 type1
= check_typedef (TYPE_TARGET_TYPE (type1
));
238 type2
= check_typedef (type2
);
239 if (TYPE_CODE (type2
) == TYPE_CODE_REF
)
240 type2
= check_typedef (TYPE_TARGET_TYPE (type2
));
242 return (TYPE_CODE (type1
) == TYPE_CODE_STRUCT
243 || TYPE_CODE (type2
) == TYPE_CODE_STRUCT
);
246 /* Check to see if either argument is a structure, or a reference to
247 one. This is called so we know whether to go ahead with the normal
248 binop or look for a user defined function instead.
250 For now, we do not overload the `=' operator. */
253 binop_user_defined_p (enum exp_opcode op
,
254 struct value
*arg1
, struct value
*arg2
)
256 return binop_types_user_defined_p (op
, value_type (arg1
), value_type (arg2
));
259 /* Check to see if argument is a structure. This is called so
260 we know whether to go ahead with the normal unop or look for a
261 user defined function instead.
263 For now, we do not overload the `&' operator. */
266 unop_user_defined_p (enum exp_opcode op
, struct value
*arg1
)
272 type1
= check_typedef (value_type (arg1
));
273 if (TYPE_CODE (type1
) == TYPE_CODE_REF
)
274 type1
= check_typedef (TYPE_TARGET_TYPE (type1
));
275 return TYPE_CODE (type1
) == TYPE_CODE_STRUCT
;
278 /* Try to find an operator named OPERATOR which takes NARGS arguments
279 specified in ARGS. If the operator found is a static member operator
280 *STATIC_MEMFUNP will be set to 1, and otherwise 0.
281 The search if performed through find_overload_match which will handle
282 member operators, non member operators, operators imported implicitly or
283 explicitly, and perform correct overload resolution in all of the above
284 situations or combinations thereof. */
286 static struct value
*
287 value_user_defined_cpp_op (struct value
**args
, int nargs
, char *oper
,
288 int *static_memfuncp
, enum noside noside
)
291 struct symbol
*symp
= NULL
;
292 struct value
*valp
= NULL
;
294 find_overload_match (args
, nargs
, oper
, BOTH
/* could be method */,
296 NULL
/* pass NULL symbol since symbol is unknown */,
297 &valp
, &symp
, static_memfuncp
, 0, noside
);
304 /* This is a non member function and does not
305 expect a reference as its first argument
306 rather the explicit structure. */
307 args
[0] = value_ind (args
[0]);
308 return value_of_variable (symp
, 0);
311 error (_("Could not find %s."), oper
);
314 /* Lookup user defined operator NAME. Return a value representing the
315 function, otherwise return NULL. */
317 static struct value
*
318 value_user_defined_op (struct value
**argp
, struct value
**args
, char *name
,
319 int *static_memfuncp
, int nargs
, enum noside noside
)
321 struct value
*result
= NULL
;
323 if (current_language
->la_language
== language_cplus
)
325 result
= value_user_defined_cpp_op (args
, nargs
, name
, static_memfuncp
,
329 result
= value_struct_elt (argp
, args
, name
, static_memfuncp
,
335 /* We know either arg1 or arg2 is a structure, so try to find the right
336 user defined function. Create an argument vector that calls
337 arg1.operator @ (arg1,arg2) and return that value (where '@' is any
338 binary operator which is legal for GNU C++).
340 OP is the operatore, and if it is BINOP_ASSIGN_MODIFY, then OTHEROP
341 is the opcode saying how to modify it. Otherwise, OTHEROP is
345 value_x_binop (struct value
*arg1
, struct value
*arg2
, enum exp_opcode op
,
346 enum exp_opcode otherop
, enum noside noside
)
348 struct value
**argvec
;
353 arg1
= coerce_ref (arg1
);
354 arg2
= coerce_ref (arg2
);
356 /* now we know that what we have to do is construct our
357 arg vector and find the right function to call it with. */
359 if (TYPE_CODE (check_typedef (value_type (arg1
))) != TYPE_CODE_STRUCT
)
360 error (_("Can't do that binary op on that type")); /* FIXME be explicit */
362 argvec
= (struct value
**) alloca (sizeof (struct value
*) * 4);
363 argvec
[1] = value_addr (arg1
);
367 /* Make the right function name up. */
368 strcpy (tstr
, "operator__");
393 case BINOP_BITWISE_AND
:
396 case BINOP_BITWISE_IOR
:
399 case BINOP_BITWISE_XOR
:
402 case BINOP_LOGICAL_AND
:
405 case BINOP_LOGICAL_OR
:
417 case BINOP_ASSIGN_MODIFY
:
435 case BINOP_BITWISE_AND
:
438 case BINOP_BITWISE_IOR
:
441 case BINOP_BITWISE_XOR
:
444 case BINOP_MOD
: /* invalid */
446 error (_("Invalid binary operation specified."));
449 case BINOP_SUBSCRIPT
:
470 case BINOP_MOD
: /* invalid */
472 error (_("Invalid binary operation specified."));
475 argvec
[0] = value_user_defined_op (&arg1
, argvec
+ 1, tstr
,
476 &static_memfuncp
, 2, noside
);
482 argvec
[1] = argvec
[0];
485 if (TYPE_CODE (value_type (argvec
[0])) == TYPE_CODE_XMETHOD
)
487 /* Static xmethods are not supported yet. */
488 gdb_assert (static_memfuncp
== 0);
489 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
491 struct type
*return_type
492 = result_type_of_xmethod (argvec
[0], 2, argvec
+ 1);
494 if (return_type
== NULL
)
495 error (_("Xmethod is missing return type."));
496 return value_zero (return_type
, VALUE_LVAL (arg1
));
498 return call_xmethod (argvec
[0], 2, argvec
+ 1);
500 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
502 struct type
*return_type
;
505 = TYPE_TARGET_TYPE (check_typedef (value_type (argvec
[0])));
506 return value_zero (return_type
, VALUE_LVAL (arg1
));
508 return call_function_by_hand (argvec
[0], 2 - static_memfuncp
,
511 throw_error (NOT_FOUND_ERROR
,
512 _("member function %s not found"), tstr
);
514 return call_function_by_hand (argvec
[0], 2 - static_memfuncp
, argvec
+ 1);
518 /* We know that arg1 is a structure, so try to find a unary user
519 defined operator that matches the operator in question.
520 Create an argument vector that calls arg1.operator @ (arg1)
521 and return that value (where '@' is (almost) any unary operator which
522 is legal for GNU C++). */
525 value_x_unop (struct value
*arg1
, enum exp_opcode op
, enum noside noside
)
527 struct gdbarch
*gdbarch
= get_type_arch (value_type (arg1
));
528 struct value
**argvec
;
530 char tstr
[13], mangle_tstr
[13];
531 int static_memfuncp
, nargs
;
533 arg1
= coerce_ref (arg1
);
535 /* now we know that what we have to do is construct our
536 arg vector and find the right function to call it with. */
538 if (TYPE_CODE (check_typedef (value_type (arg1
))) != TYPE_CODE_STRUCT
)
539 error (_("Can't do that unary op on that type")); /* FIXME be explicit */
541 argvec
= (struct value
**) alloca (sizeof (struct value
*) * 4);
542 argvec
[1] = value_addr (arg1
);
547 /* Make the right function name up. */
548 strcpy (tstr
, "operator__");
550 strcpy (mangle_tstr
, "__");
553 case UNOP_PREINCREMENT
:
556 case UNOP_PREDECREMENT
:
559 case UNOP_POSTINCREMENT
:
561 argvec
[2] = value_from_longest (builtin_type (gdbarch
)->builtin_int
, 0);
565 case UNOP_POSTDECREMENT
:
567 argvec
[2] = value_from_longest (builtin_type (gdbarch
)->builtin_int
, 0);
571 case UNOP_LOGICAL_NOT
:
574 case UNOP_COMPLEMENT
:
590 error (_("Invalid unary operation specified."));
593 argvec
[0] = value_user_defined_op (&arg1
, argvec
+ 1, tstr
,
594 &static_memfuncp
, nargs
, noside
);
600 argvec
[1] = argvec
[0];
604 if (TYPE_CODE (value_type (argvec
[0])) == TYPE_CODE_XMETHOD
)
606 /* Static xmethods are not supported yet. */
607 gdb_assert (static_memfuncp
== 0);
608 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
610 struct type
*return_type
611 = result_type_of_xmethod (argvec
[0], 1, argvec
+ 1);
613 if (return_type
== NULL
)
614 error (_("Xmethod is missing return type."));
615 return value_zero (return_type
, VALUE_LVAL (arg1
));
617 return call_xmethod (argvec
[0], 1, argvec
+ 1);
619 if (noside
== EVAL_AVOID_SIDE_EFFECTS
)
621 struct type
*return_type
;
624 = TYPE_TARGET_TYPE (check_typedef (value_type (argvec
[0])));
625 return value_zero (return_type
, VALUE_LVAL (arg1
));
627 return call_function_by_hand (argvec
[0], nargs
, argvec
+ 1);
629 throw_error (NOT_FOUND_ERROR
,
630 _("member function %s not found"), tstr
);
632 return 0; /* For lint -- never reached */
636 /* Concatenate two values with the following conditions:
638 (1) Both values must be either bitstring values or character string
639 values and the resulting value consists of the concatenation of
640 ARG1 followed by ARG2.
644 One value must be an integer value and the other value must be
645 either a bitstring value or character string value, which is
646 to be repeated by the number of times specified by the integer
650 (2) Boolean values are also allowed and are treated as bit string
653 (3) Character values are also allowed and are treated as character
654 string values of length 1. */
657 value_concat (struct value
*arg1
, struct value
*arg2
)
659 struct value
*inval1
;
660 struct value
*inval2
;
661 struct value
*outval
= NULL
;
662 int inval1len
, inval2len
;
666 struct type
*type1
= check_typedef (value_type (arg1
));
667 struct type
*type2
= check_typedef (value_type (arg2
));
668 struct type
*char_type
;
670 /* First figure out if we are dealing with two values to be concatenated
671 or a repeat count and a value to be repeated. INVAL1 is set to the
672 first of two concatenated values, or the repeat count. INVAL2 is set
673 to the second of the two concatenated values or the value to be
676 if (TYPE_CODE (type2
) == TYPE_CODE_INT
)
678 struct type
*tmp
= type1
;
691 /* Now process the input values. */
693 if (TYPE_CODE (type1
) == TYPE_CODE_INT
)
695 /* We have a repeat count. Validate the second value and then
696 construct a value repeated that many times. */
697 if (TYPE_CODE (type2
) == TYPE_CODE_STRING
698 || TYPE_CODE (type2
) == TYPE_CODE_CHAR
)
700 struct cleanup
*back_to
;
702 count
= longest_to_int (value_as_long (inval1
));
703 inval2len
= TYPE_LENGTH (type2
);
704 ptr
= (char *) xmalloc (count
* inval2len
);
705 back_to
= make_cleanup (xfree
, ptr
);
706 if (TYPE_CODE (type2
) == TYPE_CODE_CHAR
)
710 inchar
= (char) unpack_long (type2
,
711 value_contents (inval2
));
712 for (idx
= 0; idx
< count
; idx
++)
714 *(ptr
+ idx
) = inchar
;
719 char_type
= TYPE_TARGET_TYPE (type2
);
721 for (idx
= 0; idx
< count
; idx
++)
723 memcpy (ptr
+ (idx
* inval2len
), value_contents (inval2
),
727 outval
= value_string (ptr
, count
* inval2len
, char_type
);
728 do_cleanups (back_to
);
730 else if (TYPE_CODE (type2
) == TYPE_CODE_BOOL
)
732 error (_("unimplemented support for boolean repeats"));
736 error (_("can't repeat values of that type"));
739 else if (TYPE_CODE (type1
) == TYPE_CODE_STRING
740 || TYPE_CODE (type1
) == TYPE_CODE_CHAR
)
742 struct cleanup
*back_to
;
744 /* We have two character strings to concatenate. */
745 if (TYPE_CODE (type2
) != TYPE_CODE_STRING
746 && TYPE_CODE (type2
) != TYPE_CODE_CHAR
)
748 error (_("Strings can only be concatenated with other strings."));
750 inval1len
= TYPE_LENGTH (type1
);
751 inval2len
= TYPE_LENGTH (type2
);
752 ptr
= (char *) xmalloc (inval1len
+ inval2len
);
753 back_to
= make_cleanup (xfree
, ptr
);
754 if (TYPE_CODE (type1
) == TYPE_CODE_CHAR
)
758 *ptr
= (char) unpack_long (type1
, value_contents (inval1
));
762 char_type
= TYPE_TARGET_TYPE (type1
);
764 memcpy (ptr
, value_contents (inval1
), inval1len
);
766 if (TYPE_CODE (type2
) == TYPE_CODE_CHAR
)
769 (char) unpack_long (type2
, value_contents (inval2
));
773 memcpy (ptr
+ inval1len
, value_contents (inval2
), inval2len
);
775 outval
= value_string (ptr
, inval1len
+ inval2len
, char_type
);
776 do_cleanups (back_to
);
778 else if (TYPE_CODE (type1
) == TYPE_CODE_BOOL
)
780 /* We have two bitstrings to concatenate. */
781 if (TYPE_CODE (type2
) != TYPE_CODE_BOOL
)
783 error (_("Booleans can only be concatenated "
784 "with other bitstrings or booleans."));
786 error (_("unimplemented support for boolean concatenation."));
790 /* We don't know how to concatenate these operands. */
791 error (_("illegal operands for concatenation."));
796 /* Integer exponentiation: V1**V2, where both arguments are
797 integers. Requires V1 != 0 if V2 < 0. Returns 1 for 0 ** 0. */
800 integer_pow (LONGEST v1
, LONGEST v2
)
805 error (_("Attempt to raise 0 to negative power."));
811 /* The Russian Peasant's Algorithm. */
827 /* Integer exponentiation: V1**V2, where both arguments are
828 integers. Requires V1 != 0 if V2 < 0. Returns 1 for 0 ** 0. */
831 uinteger_pow (ULONGEST v1
, LONGEST v2
)
836 error (_("Attempt to raise 0 to negative power."));
842 /* The Russian Peasant's Algorithm. */
858 /* Obtain decimal value of arguments for binary operation, converting from
859 other types if one of them is not decimal floating point. */
861 value_args_as_decimal (struct value
*arg1
, struct value
*arg2
,
862 gdb_byte
*x
, int *len_x
, enum bfd_endian
*byte_order_x
,
863 gdb_byte
*y
, int *len_y
, enum bfd_endian
*byte_order_y
)
865 struct type
*type1
, *type2
;
867 type1
= check_typedef (value_type (arg1
));
868 type2
= check_typedef (value_type (arg2
));
870 /* At least one of the arguments must be of decimal float type. */
871 gdb_assert (TYPE_CODE (type1
) == TYPE_CODE_DECFLOAT
872 || TYPE_CODE (type2
) == TYPE_CODE_DECFLOAT
);
874 if (TYPE_CODE (type1
) == TYPE_CODE_FLT
875 || TYPE_CODE (type2
) == TYPE_CODE_FLT
)
876 /* The DFP extension to the C language does not allow mixing of
877 * decimal float types with other float types in expressions
878 * (see WDTR 24732, page 12). */
879 error (_("Mixing decimal floating types with "
880 "other floating types is not allowed."));
882 /* Obtain decimal value of arg1, converting from other types
885 if (TYPE_CODE (type1
) == TYPE_CODE_DECFLOAT
)
887 *byte_order_x
= gdbarch_byte_order (get_type_arch (type1
));
888 *len_x
= TYPE_LENGTH (type1
);
889 memcpy (x
, value_contents (arg1
), *len_x
);
891 else if (is_integral_type (type1
))
893 *byte_order_x
= gdbarch_byte_order (get_type_arch (type2
));
894 *len_x
= TYPE_LENGTH (type2
);
895 decimal_from_integral (arg1
, x
, *len_x
, *byte_order_x
);
898 error (_("Don't know how to convert from %s to %s."), TYPE_NAME (type1
),
901 /* Obtain decimal value of arg2, converting from other types
904 if (TYPE_CODE (type2
) == TYPE_CODE_DECFLOAT
)
906 *byte_order_y
= gdbarch_byte_order (get_type_arch (type2
));
907 *len_y
= TYPE_LENGTH (type2
);
908 memcpy (y
, value_contents (arg2
), *len_y
);
910 else if (is_integral_type (type2
))
912 *byte_order_y
= gdbarch_byte_order (get_type_arch (type1
));
913 *len_y
= TYPE_LENGTH (type1
);
914 decimal_from_integral (arg2
, y
, *len_y
, *byte_order_y
);
917 error (_("Don't know how to convert from %s to %s."), TYPE_NAME (type1
),
921 /* Perform a binary operation on two operands which have reasonable
922 representations as integers or floats. This includes booleans,
923 characters, integers, or floats.
924 Does not support addition and subtraction on pointers;
925 use value_ptradd, value_ptrsub or value_ptrdiff for those operations. */
927 static struct value
*
928 scalar_binop (struct value
*arg1
, struct value
*arg2
, enum exp_opcode op
)
931 struct type
*type1
, *type2
, *result_type
;
933 arg1
= coerce_ref (arg1
);
934 arg2
= coerce_ref (arg2
);
936 type1
= check_typedef (value_type (arg1
));
937 type2
= check_typedef (value_type (arg2
));
939 if ((TYPE_CODE (type1
) != TYPE_CODE_FLT
940 && TYPE_CODE (type1
) != TYPE_CODE_DECFLOAT
941 && !is_integral_type (type1
))
942 || (TYPE_CODE (type2
) != TYPE_CODE_FLT
943 && TYPE_CODE (type2
) != TYPE_CODE_DECFLOAT
944 && !is_integral_type (type2
)))
945 error (_("Argument to arithmetic operation not a number or boolean."));
947 if (TYPE_CODE (type1
) == TYPE_CODE_DECFLOAT
948 || TYPE_CODE (type2
) == TYPE_CODE_DECFLOAT
)
950 int len_v1
, len_v2
, len_v
;
951 enum bfd_endian byte_order_v1
, byte_order_v2
, byte_order_v
;
952 gdb_byte v1
[16], v2
[16];
955 /* If only one type is decimal float, use its type.
956 Otherwise use the bigger type. */
957 if (TYPE_CODE (type1
) != TYPE_CODE_DECFLOAT
)
959 else if (TYPE_CODE (type2
) != TYPE_CODE_DECFLOAT
)
961 else if (TYPE_LENGTH (type2
) > TYPE_LENGTH (type1
))
966 len_v
= TYPE_LENGTH (result_type
);
967 byte_order_v
= gdbarch_byte_order (get_type_arch (result_type
));
969 value_args_as_decimal (arg1
, arg2
, v1
, &len_v1
, &byte_order_v1
,
970 v2
, &len_v2
, &byte_order_v2
);
979 decimal_binop (op
, v1
, len_v1
, byte_order_v1
,
980 v2
, len_v2
, byte_order_v2
,
981 v
, len_v
, byte_order_v
);
985 error (_("Operation not valid for decimal floating point number."));
988 val
= value_from_decfloat (result_type
, v
);
990 else if (TYPE_CODE (type1
) == TYPE_CODE_FLT
991 || TYPE_CODE (type2
) == TYPE_CODE_FLT
)
993 /* FIXME-if-picky-about-floating-accuracy: Should be doing this
994 in target format. real.c in GCC probably has the necessary
996 DOUBLEST v1
, v2
, v
= 0;
998 v1
= value_as_double (arg1
);
999 v2
= value_as_double (arg2
);
1023 error (_("Cannot perform exponentiation: %s"),
1024 safe_strerror (errno
));
1028 v
= v1
< v2
? v1
: v2
;
1032 v
= v1
> v2
? v1
: v2
;
1036 error (_("Integer-only operation on floating point number."));
1039 /* If only one type is float, use its type.
1040 Otherwise use the bigger type. */
1041 if (TYPE_CODE (type1
) != TYPE_CODE_FLT
)
1042 result_type
= type2
;
1043 else if (TYPE_CODE (type2
) != TYPE_CODE_FLT
)
1044 result_type
= type1
;
1045 else if (TYPE_LENGTH (type2
) > TYPE_LENGTH (type1
))
1046 result_type
= type2
;
1048 result_type
= type1
;
1050 val
= allocate_value (result_type
);
1051 store_typed_floating (value_contents_raw (val
), value_type (val
), v
);
1053 else if (TYPE_CODE (type1
) == TYPE_CODE_BOOL
1054 || TYPE_CODE (type2
) == TYPE_CODE_BOOL
)
1056 LONGEST v1
, v2
, v
= 0;
1058 v1
= value_as_long (arg1
);
1059 v2
= value_as_long (arg2
);
1063 case BINOP_BITWISE_AND
:
1067 case BINOP_BITWISE_IOR
:
1071 case BINOP_BITWISE_XOR
:
1079 case BINOP_NOTEQUAL
:
1084 error (_("Invalid operation on booleans."));
1087 result_type
= type1
;
1089 val
= allocate_value (result_type
);
1090 store_signed_integer (value_contents_raw (val
),
1091 TYPE_LENGTH (result_type
),
1092 gdbarch_byte_order (get_type_arch (result_type
)),
1096 /* Integral operations here. */
1098 /* Determine type length of the result, and if the operation should
1099 be done unsigned. For exponentiation and shift operators,
1100 use the length and type of the left operand. Otherwise,
1101 use the signedness of the operand with the greater length.
1102 If both operands are of equal length, use unsigned operation
1103 if one of the operands is unsigned. */
1104 if (op
== BINOP_RSH
|| op
== BINOP_LSH
|| op
== BINOP_EXP
)
1105 result_type
= type1
;
1106 else if (TYPE_LENGTH (type1
) > TYPE_LENGTH (type2
))
1107 result_type
= type1
;
1108 else if (TYPE_LENGTH (type2
) > TYPE_LENGTH (type1
))
1109 result_type
= type2
;
1110 else if (TYPE_UNSIGNED (type1
))
1111 result_type
= type1
;
1112 else if (TYPE_UNSIGNED (type2
))
1113 result_type
= type2
;
1115 result_type
= type1
;
1117 if (TYPE_UNSIGNED (result_type
))
1119 LONGEST v2_signed
= value_as_long (arg2
);
1120 ULONGEST v1
, v2
, v
= 0;
1122 v1
= (ULONGEST
) value_as_long (arg1
);
1123 v2
= (ULONGEST
) v2_signed
;
1144 error (_("Division by zero"));
1148 v
= uinteger_pow (v1
, v2_signed
);
1155 error (_("Division by zero"));
1159 /* Knuth 1.2.4, integer only. Note that unlike the C '%' op,
1160 v1 mod 0 has a defined value, v1. */
1168 /* Note floor(v1/v2) == v1/v2 for unsigned. */
1181 case BINOP_BITWISE_AND
:
1185 case BINOP_BITWISE_IOR
:
1189 case BINOP_BITWISE_XOR
:
1193 case BINOP_LOGICAL_AND
:
1197 case BINOP_LOGICAL_OR
:
1202 v
= v1
< v2
? v1
: v2
;
1206 v
= v1
> v2
? v1
: v2
;
1213 case BINOP_NOTEQUAL
:
1234 error (_("Invalid binary operation on numbers."));
1237 val
= allocate_value (result_type
);
1238 store_unsigned_integer (value_contents_raw (val
),
1239 TYPE_LENGTH (value_type (val
)),
1241 (get_type_arch (result_type
)),
1246 LONGEST v1
, v2
, v
= 0;
1248 v1
= value_as_long (arg1
);
1249 v2
= value_as_long (arg2
);
1270 error (_("Division by zero"));
1274 v
= integer_pow (v1
, v2
);
1281 error (_("Division by zero"));
1285 /* Knuth 1.2.4, integer only. Note that unlike the C '%' op,
1286 X mod 0 has a defined value, X. */
1294 /* Compute floor. */
1295 if (TRUNCATION_TOWARDS_ZERO
&& (v
< 0) && ((v1
% v2
) != 0))
1311 case BINOP_BITWISE_AND
:
1315 case BINOP_BITWISE_IOR
:
1319 case BINOP_BITWISE_XOR
:
1323 case BINOP_LOGICAL_AND
:
1327 case BINOP_LOGICAL_OR
:
1332 v
= v1
< v2
? v1
: v2
;
1336 v
= v1
> v2
? v1
: v2
;
1343 case BINOP_NOTEQUAL
:
1364 error (_("Invalid binary operation on numbers."));
1367 val
= allocate_value (result_type
);
1368 store_signed_integer (value_contents_raw (val
),
1369 TYPE_LENGTH (value_type (val
)),
1371 (get_type_arch (result_type
)),
1379 /* Widen a scalar value SCALAR_VALUE to vector type VECTOR_TYPE by
1380 replicating SCALAR_VALUE for each element of the vector. Only scalar
1381 types that can be cast to the type of one element of the vector are
1382 acceptable. The newly created vector value is returned upon success,
1383 otherwise an error is thrown. */
1386 value_vector_widen (struct value
*scalar_value
, struct type
*vector_type
)
1388 /* Widen the scalar to a vector. */
1389 struct type
*eltype
, *scalar_type
;
1390 struct value
*val
, *elval
;
1391 LONGEST low_bound
, high_bound
;
1394 vector_type
= check_typedef (vector_type
);
1396 gdb_assert (TYPE_CODE (vector_type
) == TYPE_CODE_ARRAY
1397 && TYPE_VECTOR (vector_type
));
1399 if (!get_array_bounds (vector_type
, &low_bound
, &high_bound
))
1400 error (_("Could not determine the vector bounds"));
1402 eltype
= check_typedef (TYPE_TARGET_TYPE (vector_type
));
1403 elval
= value_cast (eltype
, scalar_value
);
1405 scalar_type
= check_typedef (value_type (scalar_value
));
1407 /* If we reduced the length of the scalar then check we didn't loose any
1409 if (TYPE_LENGTH (eltype
) < TYPE_LENGTH (scalar_type
)
1410 && !value_equal (elval
, scalar_value
))
1411 error (_("conversion of scalar to vector involves truncation"));
1413 val
= allocate_value (vector_type
);
1414 for (i
= 0; i
< high_bound
- low_bound
+ 1; i
++)
1415 /* Duplicate the contents of elval into the destination vector. */
1416 memcpy (value_contents_writeable (val
) + (i
* TYPE_LENGTH (eltype
)),
1417 value_contents_all (elval
), TYPE_LENGTH (eltype
));
1422 /* Performs a binary operation on two vector operands by calling scalar_binop
1423 for each pair of vector components. */
1425 static struct value
*
1426 vector_binop (struct value
*val1
, struct value
*val2
, enum exp_opcode op
)
1428 struct value
*val
, *tmp
, *mark
;
1429 struct type
*type1
, *type2
, *eltype1
, *eltype2
;
1430 int t1_is_vec
, t2_is_vec
, elsize
, i
;
1431 LONGEST low_bound1
, high_bound1
, low_bound2
, high_bound2
;
1433 type1
= check_typedef (value_type (val1
));
1434 type2
= check_typedef (value_type (val2
));
1436 t1_is_vec
= (TYPE_CODE (type1
) == TYPE_CODE_ARRAY
1437 && TYPE_VECTOR (type1
)) ? 1 : 0;
1438 t2_is_vec
= (TYPE_CODE (type2
) == TYPE_CODE_ARRAY
1439 && TYPE_VECTOR (type2
)) ? 1 : 0;
1441 if (!t1_is_vec
|| !t2_is_vec
)
1442 error (_("Vector operations are only supported among vectors"));
1444 if (!get_array_bounds (type1
, &low_bound1
, &high_bound1
)
1445 || !get_array_bounds (type2
, &low_bound2
, &high_bound2
))
1446 error (_("Could not determine the vector bounds"));
1448 eltype1
= check_typedef (TYPE_TARGET_TYPE (type1
));
1449 eltype2
= check_typedef (TYPE_TARGET_TYPE (type2
));
1450 elsize
= TYPE_LENGTH (eltype1
);
1452 if (TYPE_CODE (eltype1
) != TYPE_CODE (eltype2
)
1453 || elsize
!= TYPE_LENGTH (eltype2
)
1454 || TYPE_UNSIGNED (eltype1
) != TYPE_UNSIGNED (eltype2
)
1455 || low_bound1
!= low_bound2
|| high_bound1
!= high_bound2
)
1456 error (_("Cannot perform operation on vectors with different types"));
1458 val
= allocate_value (type1
);
1459 mark
= value_mark ();
1460 for (i
= 0; i
< high_bound1
- low_bound1
+ 1; i
++)
1462 tmp
= value_binop (value_subscript (val1
, i
),
1463 value_subscript (val2
, i
), op
);
1464 memcpy (value_contents_writeable (val
) + i
* elsize
,
1465 value_contents_all (tmp
),
1468 value_free_to_mark (mark
);
1473 /* Perform a binary operation on two operands. */
1476 value_binop (struct value
*arg1
, struct value
*arg2
, enum exp_opcode op
)
1479 struct type
*type1
= check_typedef (value_type (arg1
));
1480 struct type
*type2
= check_typedef (value_type (arg2
));
1481 int t1_is_vec
= (TYPE_CODE (type1
) == TYPE_CODE_ARRAY
1482 && TYPE_VECTOR (type1
));
1483 int t2_is_vec
= (TYPE_CODE (type2
) == TYPE_CODE_ARRAY
1484 && TYPE_VECTOR (type2
));
1486 if (!t1_is_vec
&& !t2_is_vec
)
1487 val
= scalar_binop (arg1
, arg2
, op
);
1488 else if (t1_is_vec
&& t2_is_vec
)
1489 val
= vector_binop (arg1
, arg2
, op
);
1492 /* Widen the scalar operand to a vector. */
1493 struct value
**v
= t1_is_vec
? &arg2
: &arg1
;
1494 struct type
*t
= t1_is_vec
? type2
: type1
;
1496 if (TYPE_CODE (t
) != TYPE_CODE_FLT
1497 && TYPE_CODE (t
) != TYPE_CODE_DECFLOAT
1498 && !is_integral_type (t
))
1499 error (_("Argument to operation not a number or boolean."));
1501 /* Replicate the scalar value to make a vector value. */
1502 *v
= value_vector_widen (*v
, t1_is_vec
? type1
: type2
);
1504 val
= vector_binop (arg1
, arg2
, op
);
1510 /* Simulate the C operator ! -- return 1 if ARG1 contains zero. */
1513 value_logical_not (struct value
*arg1
)
1519 arg1
= coerce_array (arg1
);
1520 type1
= check_typedef (value_type (arg1
));
1522 if (TYPE_CODE (type1
) == TYPE_CODE_FLT
)
1523 return 0 == value_as_double (arg1
);
1524 else if (TYPE_CODE (type1
) == TYPE_CODE_DECFLOAT
)
1525 return decimal_is_zero (value_contents (arg1
), TYPE_LENGTH (type1
),
1526 gdbarch_byte_order (get_type_arch (type1
)));
1528 len
= TYPE_LENGTH (type1
);
1529 p
= value_contents (arg1
);
1540 /* Perform a comparison on two string values (whose content are not
1541 necessarily null terminated) based on their length. */
1544 value_strcmp (struct value
*arg1
, struct value
*arg2
)
1546 int len1
= TYPE_LENGTH (value_type (arg1
));
1547 int len2
= TYPE_LENGTH (value_type (arg2
));
1548 const gdb_byte
*s1
= value_contents (arg1
);
1549 const gdb_byte
*s2
= value_contents (arg2
);
1550 int i
, len
= len1
< len2
? len1
: len2
;
1552 for (i
= 0; i
< len
; i
++)
1556 else if (s1
[i
] > s2
[i
])
1564 else if (len1
> len2
)
1570 /* Simulate the C operator == by returning a 1
1571 iff ARG1 and ARG2 have equal contents. */
1574 value_equal (struct value
*arg1
, struct value
*arg2
)
1579 struct type
*type1
, *type2
;
1580 enum type_code code1
;
1581 enum type_code code2
;
1582 int is_int1
, is_int2
;
1584 arg1
= coerce_array (arg1
);
1585 arg2
= coerce_array (arg2
);
1587 type1
= check_typedef (value_type (arg1
));
1588 type2
= check_typedef (value_type (arg2
));
1589 code1
= TYPE_CODE (type1
);
1590 code2
= TYPE_CODE (type2
);
1591 is_int1
= is_integral_type (type1
);
1592 is_int2
= is_integral_type (type2
);
1594 if (is_int1
&& is_int2
)
1595 return longest_to_int (value_as_long (value_binop (arg1
, arg2
,
1597 else if ((code1
== TYPE_CODE_FLT
|| is_int1
)
1598 && (code2
== TYPE_CODE_FLT
|| is_int2
))
1600 /* NOTE: kettenis/20050816: Avoid compiler bug on systems where
1601 `long double' values are returned in static storage (m68k). */
1602 DOUBLEST d
= value_as_double (arg1
);
1604 return d
== value_as_double (arg2
);
1606 else if ((code1
== TYPE_CODE_DECFLOAT
|| is_int1
)
1607 && (code2
== TYPE_CODE_DECFLOAT
|| is_int2
))
1609 gdb_byte v1
[16], v2
[16];
1611 enum bfd_endian byte_order_v1
, byte_order_v2
;
1613 value_args_as_decimal (arg1
, arg2
, v1
, &len_v1
, &byte_order_v1
,
1614 v2
, &len_v2
, &byte_order_v2
);
1616 return decimal_compare (v1
, len_v1
, byte_order_v1
,
1617 v2
, len_v2
, byte_order_v2
) == 0;
1620 /* FIXME: Need to promote to either CORE_ADDR or LONGEST, whichever
1622 else if (code1
== TYPE_CODE_PTR
&& is_int2
)
1623 return value_as_address (arg1
) == (CORE_ADDR
) value_as_long (arg2
);
1624 else if (code2
== TYPE_CODE_PTR
&& is_int1
)
1625 return (CORE_ADDR
) value_as_long (arg1
) == value_as_address (arg2
);
1627 else if (code1
== code2
1628 && ((len
= (int) TYPE_LENGTH (type1
))
1629 == (int) TYPE_LENGTH (type2
)))
1631 p1
= value_contents (arg1
);
1632 p2
= value_contents (arg2
);
1640 else if (code1
== TYPE_CODE_STRING
&& code2
== TYPE_CODE_STRING
)
1642 return value_strcmp (arg1
, arg2
) == 0;
1646 error (_("Invalid type combination in equality test."));
1647 return 0; /* For lint -- never reached. */
1651 /* Compare values based on their raw contents. Useful for arrays since
1652 value_equal coerces them to pointers, thus comparing just the address
1653 of the array instead of its contents. */
1656 value_equal_contents (struct value
*arg1
, struct value
*arg2
)
1658 struct type
*type1
, *type2
;
1660 type1
= check_typedef (value_type (arg1
));
1661 type2
= check_typedef (value_type (arg2
));
1663 return (TYPE_CODE (type1
) == TYPE_CODE (type2
)
1664 && TYPE_LENGTH (type1
) == TYPE_LENGTH (type2
)
1665 && memcmp (value_contents (arg1
), value_contents (arg2
),
1666 TYPE_LENGTH (type1
)) == 0);
1669 /* Simulate the C operator < by returning 1
1670 iff ARG1's contents are less than ARG2's. */
1673 value_less (struct value
*arg1
, struct value
*arg2
)
1675 enum type_code code1
;
1676 enum type_code code2
;
1677 struct type
*type1
, *type2
;
1678 int is_int1
, is_int2
;
1680 arg1
= coerce_array (arg1
);
1681 arg2
= coerce_array (arg2
);
1683 type1
= check_typedef (value_type (arg1
));
1684 type2
= check_typedef (value_type (arg2
));
1685 code1
= TYPE_CODE (type1
);
1686 code2
= TYPE_CODE (type2
);
1687 is_int1
= is_integral_type (type1
);
1688 is_int2
= is_integral_type (type2
);
1690 if (is_int1
&& is_int2
)
1691 return longest_to_int (value_as_long (value_binop (arg1
, arg2
,
1693 else if ((code1
== TYPE_CODE_FLT
|| is_int1
)
1694 && (code2
== TYPE_CODE_FLT
|| is_int2
))
1696 /* NOTE: kettenis/20050816: Avoid compiler bug on systems where
1697 `long double' values are returned in static storage (m68k). */
1698 DOUBLEST d
= value_as_double (arg1
);
1700 return d
< value_as_double (arg2
);
1702 else if ((code1
== TYPE_CODE_DECFLOAT
|| is_int1
)
1703 && (code2
== TYPE_CODE_DECFLOAT
|| is_int2
))
1705 gdb_byte v1
[16], v2
[16];
1707 enum bfd_endian byte_order_v1
, byte_order_v2
;
1709 value_args_as_decimal (arg1
, arg2
, v1
, &len_v1
, &byte_order_v1
,
1710 v2
, &len_v2
, &byte_order_v2
);
1712 return decimal_compare (v1
, len_v1
, byte_order_v1
,
1713 v2
, len_v2
, byte_order_v2
) == -1;
1715 else if (code1
== TYPE_CODE_PTR
&& code2
== TYPE_CODE_PTR
)
1716 return value_as_address (arg1
) < value_as_address (arg2
);
1718 /* FIXME: Need to promote to either CORE_ADDR or LONGEST, whichever
1720 else if (code1
== TYPE_CODE_PTR
&& is_int2
)
1721 return value_as_address (arg1
) < (CORE_ADDR
) value_as_long (arg2
);
1722 else if (code2
== TYPE_CODE_PTR
&& is_int1
)
1723 return (CORE_ADDR
) value_as_long (arg1
) < value_as_address (arg2
);
1724 else if (code1
== TYPE_CODE_STRING
&& code2
== TYPE_CODE_STRING
)
1725 return value_strcmp (arg1
, arg2
) < 0;
1728 error (_("Invalid type combination in ordering comparison."));
1733 /* The unary operators +, - and ~. They free the argument ARG1. */
1736 value_pos (struct value
*arg1
)
1740 arg1
= coerce_ref (arg1
);
1741 type
= check_typedef (value_type (arg1
));
1743 if (TYPE_CODE (type
) == TYPE_CODE_FLT
)
1744 return value_from_double (type
, value_as_double (arg1
));
1745 else if (TYPE_CODE (type
) == TYPE_CODE_DECFLOAT
)
1746 return value_from_decfloat (type
, value_contents (arg1
));
1747 else if (is_integral_type (type
))
1749 return value_from_longest (type
, value_as_long (arg1
));
1751 else if (TYPE_CODE (type
) == TYPE_CODE_ARRAY
&& TYPE_VECTOR (type
))
1753 struct value
*val
= allocate_value (type
);
1755 memcpy (value_contents_raw (val
), value_contents (arg1
),
1756 TYPE_LENGTH (type
));
1761 error (_("Argument to positive operation not a number."));
1762 return 0; /* For lint -- never reached. */
1767 value_neg (struct value
*arg1
)
1771 arg1
= coerce_ref (arg1
);
1772 type
= check_typedef (value_type (arg1
));
1774 if (TYPE_CODE (type
) == TYPE_CODE_DECFLOAT
)
1776 struct value
*val
= allocate_value (type
);
1777 int len
= TYPE_LENGTH (type
);
1778 gdb_byte decbytes
[16]; /* a decfloat is at most 128 bits long. */
1780 memcpy (decbytes
, value_contents (arg1
), len
);
1782 if (gdbarch_byte_order (get_type_arch (type
)) == BFD_ENDIAN_LITTLE
)
1783 decbytes
[len
-1] = decbytes
[len
- 1] | 0x80;
1785 decbytes
[0] = decbytes
[0] | 0x80;
1787 memcpy (value_contents_raw (val
), decbytes
, len
);
1790 else if (TYPE_CODE (type
) == TYPE_CODE_FLT
)
1791 return value_from_double (type
, -value_as_double (arg1
));
1792 else if (is_integral_type (type
))
1794 return value_from_longest (type
, -value_as_long (arg1
));
1796 else if (TYPE_CODE (type
) == TYPE_CODE_ARRAY
&& TYPE_VECTOR (type
))
1798 struct value
*tmp
, *val
= allocate_value (type
);
1799 struct type
*eltype
= check_typedef (TYPE_TARGET_TYPE (type
));
1801 LONGEST low_bound
, high_bound
;
1803 if (!get_array_bounds (type
, &low_bound
, &high_bound
))
1804 error (_("Could not determine the vector bounds"));
1806 for (i
= 0; i
< high_bound
- low_bound
+ 1; i
++)
1808 tmp
= value_neg (value_subscript (arg1
, i
));
1809 memcpy (value_contents_writeable (val
) + i
* TYPE_LENGTH (eltype
),
1810 value_contents_all (tmp
), TYPE_LENGTH (eltype
));
1816 error (_("Argument to negate operation not a number."));
1817 return 0; /* For lint -- never reached. */
1822 value_complement (struct value
*arg1
)
1827 arg1
= coerce_ref (arg1
);
1828 type
= check_typedef (value_type (arg1
));
1830 if (is_integral_type (type
))
1831 val
= value_from_longest (type
, ~value_as_long (arg1
));
1832 else if (TYPE_CODE (type
) == TYPE_CODE_ARRAY
&& TYPE_VECTOR (type
))
1835 struct type
*eltype
= check_typedef (TYPE_TARGET_TYPE (type
));
1837 LONGEST low_bound
, high_bound
;
1839 if (!get_array_bounds (type
, &low_bound
, &high_bound
))
1840 error (_("Could not determine the vector bounds"));
1842 val
= allocate_value (type
);
1843 for (i
= 0; i
< high_bound
- low_bound
+ 1; i
++)
1845 tmp
= value_complement (value_subscript (arg1
, i
));
1846 memcpy (value_contents_writeable (val
) + i
* TYPE_LENGTH (eltype
),
1847 value_contents_all (tmp
), TYPE_LENGTH (eltype
));
1851 error (_("Argument to complement operation not an integer, boolean."));
1856 /* The INDEX'th bit of SET value whose value_type is TYPE,
1857 and whose value_contents is valaddr.
1858 Return -1 if out of range, -2 other error. */
1861 value_bit_index (struct type
*type
, const gdb_byte
*valaddr
, int index
)
1863 struct gdbarch
*gdbarch
= get_type_arch (type
);
1864 LONGEST low_bound
, high_bound
;
1867 struct type
*range
= TYPE_INDEX_TYPE (type
);
1869 if (get_discrete_bounds (range
, &low_bound
, &high_bound
) < 0)
1871 if (index
< low_bound
|| index
> high_bound
)
1873 rel_index
= index
- low_bound
;
1874 word
= extract_unsigned_integer (valaddr
+ (rel_index
/ TARGET_CHAR_BIT
), 1,
1875 gdbarch_byte_order (gdbarch
));
1876 rel_index
%= TARGET_CHAR_BIT
;
1877 if (gdbarch_bits_big_endian (gdbarch
))
1878 rel_index
= TARGET_CHAR_BIT
- 1 - rel_index
;
1879 return (word
>> rel_index
) & 1;
1883 value_in (struct value
*element
, struct value
*set
)
1886 struct type
*settype
= check_typedef (value_type (set
));
1887 struct type
*eltype
= check_typedef (value_type (element
));
1889 if (TYPE_CODE (eltype
) == TYPE_CODE_RANGE
)
1890 eltype
= TYPE_TARGET_TYPE (eltype
);
1891 if (TYPE_CODE (settype
) != TYPE_CODE_SET
)
1892 error (_("Second argument of 'IN' has wrong type"));
1893 if (TYPE_CODE (eltype
) != TYPE_CODE_INT
1894 && TYPE_CODE (eltype
) != TYPE_CODE_CHAR
1895 && TYPE_CODE (eltype
) != TYPE_CODE_ENUM
1896 && TYPE_CODE (eltype
) != TYPE_CODE_BOOL
)
1897 error (_("First argument of 'IN' has wrong type"));
1898 member
= value_bit_index (settype
, value_contents (set
),
1899 value_as_long (element
));
1901 error (_("First argument of 'IN' not in range"));
1906 _initialize_valarith (void)
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