/* Perform arithmetic and other operations on values, for GDB.
- Copyright 1986, 1989, 1991, 1992 Free Software Foundation, Inc.
+ Copyright 1986, 1989, 1991, 1992, 1993, 1994
+ Free Software Foundation, Inc.
This file is part of GDB.
#include "expression.h"
#include "target.h"
#include "language.h"
+#include "demangle.h"
#include <string.h>
/* Define whether or not the C operator '/' truncates towards zero for
#define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2)
#endif
-static value
-value_subscripted_rvalue PARAMS ((value, value));
+static value_ptr value_subscripted_rvalue PARAMS ((value_ptr, value_ptr));
\f
-value
+value_ptr
value_add (arg1, arg2)
- value arg1, arg2;
+ value_ptr arg1, arg2;
{
- register value valint, valptr;
+ register value_ptr valint, valptr;
register int len;
COERCE_ARRAY (arg1);
return value_binop (arg1, arg2, BINOP_ADD);
}
-value
+value_ptr
value_sub (arg1, arg2)
- value arg1, arg2;
+ value_ptr arg1, arg2;
{
COERCE_ARRAY (arg1);
- (TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (arg1)))
* value_as_long (arg2)));
}
- else if (VALUE_TYPE (arg1) == VALUE_TYPE (arg2))
+ else if (TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_PTR
+ && TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (arg1)))
+ == TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (arg2))))
{
/* pointer to <type x> - pointer to <type x>. */
return value_from_longest
(builtin_type_long, /* FIXME -- should be ptrdiff_t */
(value_as_long (arg1) - value_as_long (arg2))
- / TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (arg1))));
+ / (LONGEST) (TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (arg1)))));
}
else
{
FIXME: Perhaps we should validate that the index is valid and if
verbosity is set, warn about invalid indices (but still use them). */
-value
+value_ptr
value_subscript (array, idx)
- value array, idx;
+ value_ptr array, idx;
{
int lowerbound;
- value bound;
+ value_ptr bound;
struct type *range_type;
- if (TYPE_CODE (VALUE_TYPE (array)) == TYPE_CODE_ARRAY)
+ COERCE_REF (array);
+
+ if (TYPE_CODE (VALUE_TYPE (array)) == TYPE_CODE_ARRAY
+ || TYPE_CODE (VALUE_TYPE (array)) == TYPE_CODE_STRING)
{
range_type = TYPE_FIELD_TYPE (VALUE_TYPE (array), 0);
lowerbound = TYPE_FIELD_BITPOS (range_type, 0);
{
return value_subscripted_rvalue (array, idx);
}
+ array = value_coerce_array (array);
}
return value_ind (value_add (array, idx));
}
(eg, a vector register). This routine used to promote floats
to doubles, but no longer does. */
-static value
+static value_ptr
value_subscripted_rvalue (array, idx)
- value array, idx;
+ value_ptr array, idx;
{
struct type *elt_type = TYPE_TARGET_TYPE (VALUE_TYPE (array));
int elt_size = TYPE_LENGTH (elt_type);
int elt_offs = elt_size * longest_to_int (value_as_long (idx));
- value v;
+ value_ptr v;
if (elt_offs >= TYPE_LENGTH (VALUE_TYPE (array)))
error ("no such vector element");
int
binop_user_defined_p (op, arg1, arg2)
enum exp_opcode op;
- value arg1, arg2;
+ value_ptr arg1, arg2;
{
if (op == BINOP_ASSIGN)
return 0;
int unop_user_defined_p (op, arg1)
enum exp_opcode op;
- value arg1;
+ value_ptr arg1;
{
if (op == UNOP_ADDR)
return 0;
is the opcode saying how to modify it. Otherwise, OTHEROP is
unused. */
-value
+value_ptr
value_x_binop (arg1, arg2, op, otherop)
- value arg1, arg2;
+ value_ptr arg1, arg2;
enum exp_opcode op, otherop;
{
- value * argvec;
+ value_ptr * argvec;
char *ptr;
char tstr[13];
int static_memfuncp;
if (TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_STRUCT)
error ("Can't do that binary op on that type"); /* FIXME be explicit */
- argvec = (value *) alloca (sizeof (value) * 4);
+ argvec = (value_ptr *) alloca (sizeof (value_ptr) * 4);
argvec[1] = value_addr (arg1);
argvec[2] = arg2;
argvec[3] = 0;
default:
error ("Invalid binary operation specified.");
}
+
argvec[0] = value_struct_elt (&arg1, argvec+1, tstr, &static_memfuncp, "structure");
+
if (argvec[0])
{
if (static_memfuncp)
and return that value (where '@' is (almost) any unary operator which
is legal for GNU C++). */
-value
+value_ptr
value_x_unop (arg1, op)
- value arg1;
+ value_ptr arg1;
enum exp_opcode op;
{
- value * argvec;
- char *ptr;
- char tstr[13];
+ value_ptr * argvec;
+ char *ptr, *mangle_ptr;
+ char tstr[13], mangle_tstr[13];
int static_memfuncp;
COERCE_ENUM (arg1);
if (TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_STRUCT)
error ("Can't do that unary op on that type"); /* FIXME be explicit */
- argvec = (value *) alloca (sizeof (value) * 3);
+ argvec = (value_ptr *) alloca (sizeof (value_ptr) * 3);
argvec[1] = value_addr (arg1);
argvec[2] = 0;
/* make the right function name up */
strcpy(tstr,"operator__");
ptr = tstr+8;
+ strcpy(mangle_tstr, "__");
+ mangle_ptr = mangle_tstr+2;
switch (op)
{
case UNOP_PREINCREMENT: strcpy(ptr,"++"); break;
default:
error ("Invalid binary operation specified.");
}
+
argvec[0] = value_struct_elt (&arg1, argvec+1, tstr, &static_memfuncp, "structure");
+
if (argvec[0])
{
if (static_memfuncp)
string values of length 1.
*/
-value
+value_ptr
value_concat (arg1, arg2)
- value arg1, arg2;
+ value_ptr arg1, arg2;
{
- register value inval1, inval2, outval;
+ register value_ptr inval1, inval2, outval;
int inval1len, inval2len;
int count, idx;
char *ptr;
}
\f
+
/* Perform a binary operation on two operands which have reasonable
representations as integers or floats. This includes booleans,
characters, integers, or floats.
Does not support addition and subtraction on pointers;
use value_add or value_sub if you want to handle those possibilities. */
-value
+value_ptr
value_binop (arg1, arg2, op)
- value arg1, arg2;
+ value_ptr arg1, arg2;
enum exp_opcode op;
{
- register value val;
+ register value_ptr val;
COERCE_ENUM (arg1);
COERCE_ENUM (arg2);
if ((TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_FLT
- &&
- TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_CHAR
- &&
- TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_INT
- &&
- TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_BOOL)
+ && TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_CHAR
+ && TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_INT
+ && TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_BOOL
+ && TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_RANGE)
||
(TYPE_CODE (VALUE_TYPE (arg2)) != TYPE_CODE_FLT
- &&
- TYPE_CODE (VALUE_TYPE (arg2)) != TYPE_CODE_CHAR
- &&
- TYPE_CODE (VALUE_TYPE (arg2)) != TYPE_CODE_INT
- &&
- TYPE_CODE (VALUE_TYPE (arg2)) != TYPE_CODE_BOOL))
+ && TYPE_CODE (VALUE_TYPE (arg2)) != TYPE_CODE_CHAR
+ && TYPE_CODE (VALUE_TYPE (arg2)) != TYPE_CODE_INT
+ && TYPE_CODE (VALUE_TYPE (arg2)) != TYPE_CODE_BOOL
+ && TYPE_CODE (VALUE_TYPE (arg2)) != TYPE_CODE_RANGE))
error ("Argument to arithmetic operation not a number or boolean.");
if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_FLT
||
TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_FLT)
{
+ /* FIXME-if-picky-about-floating-accuracy: Should be doing this
+ in target format. real.c in GCC probably has the necessary
+ code. */
double v1, v2, v;
v1 = value_as_double (arg1);
v2 = value_as_double (arg2);
}
val = allocate_value (builtin_type_double);
- SWAP_TARGET_AND_HOST (&v, sizeof (v));
- *(double *) VALUE_CONTENTS_RAW (val) = v;
+ store_floating (VALUE_CONTENTS_RAW (val), TYPE_LENGTH (VALUE_TYPE (val)),
+ v);
}
else if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_BOOL
&&
error ("Invalid operation on booleans.");
}
- /* start-sanitize-chill (FIXME!) */
val = allocate_value (builtin_type_chill_bool);
- /* end-sanitize-chill */
- SWAP_TARGET_AND_HOST (&v, sizeof (v));
- *(LONGEST *) VALUE_CONTENTS_RAW (val) = v;
+ store_signed_integer (VALUE_CONTENTS_RAW (val),
+ TYPE_LENGTH (VALUE_TYPE (val)),
+ v);
}
else
/* Integral operations here. */
/* FIXME: Also mixed integral/booleans, with result an integer. */
+ /* FIXME: This implements ANSI C rules (also correct for C++).
+ What about FORTRAN and chill? */
{
- /* Should we promote to unsigned longest? */
- if ((TYPE_UNSIGNED (VALUE_TYPE (arg1))
- || TYPE_UNSIGNED (VALUE_TYPE (arg2)))
- && (TYPE_LENGTH (VALUE_TYPE (arg1)) >= sizeof (unsigned LONGEST)
- || TYPE_LENGTH (VALUE_TYPE (arg1)) >= sizeof (unsigned LONGEST)))
+ struct type *type1 = VALUE_TYPE (arg1);
+ struct type *type2 = VALUE_TYPE (arg2);
+ int promoted_len1 = TYPE_LENGTH (type1);
+ int promoted_len2 = TYPE_LENGTH (type2);
+ int is_unsigned1 = TYPE_UNSIGNED (type1);
+ int is_unsigned2 = TYPE_UNSIGNED (type2);
+ int result_len;
+ int unsigned_operation;
+
+ /* Determine type length and signedness after promotion for
+ both operands. */
+ if (promoted_len1 < TYPE_LENGTH (builtin_type_int))
+ {
+ is_unsigned1 = 0;
+ promoted_len1 = TYPE_LENGTH (builtin_type_int);
+ }
+ if (promoted_len2 < TYPE_LENGTH (builtin_type_int))
+ {
+ is_unsigned2 = 0;
+ promoted_len2 = TYPE_LENGTH (builtin_type_int);
+ }
+
+ /* Determine type length of the result, and if the operation should
+ be done unsigned.
+ Use the signedness of the operand with the greater length.
+ If both operands are of equal length, use unsigned operation
+ if one of the operands is unsigned. */
+ if (promoted_len1 > promoted_len2)
+ {
+ unsigned_operation = is_unsigned1;
+ result_len = promoted_len1;
+ }
+ else if (promoted_len2 > promoted_len1)
+ {
+ unsigned_operation = is_unsigned2;
+ result_len = promoted_len2;
+ }
+ else
+ {
+ unsigned_operation = is_unsigned1 || is_unsigned2;
+ result_len = promoted_len1;
+ }
+
+ if (unsigned_operation)
{
unsigned LONGEST v1, v2, v;
v1 = (unsigned LONGEST) value_as_long (arg1);
v2 = (unsigned LONGEST) value_as_long (arg2);
+
+ /* Truncate values to the type length of the result. */
+ if (result_len < sizeof (unsigned LONGEST))
+ {
+ v1 &= ((LONGEST) 1 << HOST_CHAR_BIT * result_len) - 1;
+ v2 &= ((LONGEST) 1 << HOST_CHAR_BIT * result_len) - 1;
+ }
switch (op)
{
case BINOP_MOD:
/* Knuth 1.2.4, integer only. Note that unlike the C '%' op,
v1 mod 0 has a defined value, v1. */
- /* start-sanitize-chill */
/* Chill specifies that v2 must be > 0, so check for that. */
if (current_language -> la_language == language_chill
&& value_as_long (arg2) <= 0)
{
error ("Second operand of MOD must be greater than zero.");
}
- /* end-sanitize-chill */
if (v2 == 0)
{
v = v1;
case BINOP_MAX:
v = v1 > v2 ? v1 : v2;
break;
+
+ case BINOP_EQUAL:
+ v = v1 == v2;
+ break;
+
+ case BINOP_LESS:
+ v = v1 < v2;
+ break;
default:
error ("Invalid binary operation on numbers.");
}
- val = allocate_value (BUILTIN_TYPE_UNSIGNED_LONGEST);
- SWAP_TARGET_AND_HOST (&v, sizeof (v));
- *(unsigned LONGEST *) VALUE_CONTENTS_RAW (val) = v;
+ /* This is a kludge to get around the fact that we don't
+ know how to determine the result type from the types of
+ the operands. (I'm not really sure how much we feel the
+ need to duplicate the exact rules of the current
+ language. They can get really hairy. But not to do so
+ makes it hard to document just what we *do* do). */
+
+ /* Can't just call init_type because we wouldn't know what
+ name to give the type. */
+ val = allocate_value
+ (result_len > TARGET_LONG_BIT / HOST_CHAR_BIT
+ ? builtin_type_unsigned_long_long
+ : builtin_type_unsigned_long);
+ store_unsigned_integer (VALUE_CONTENTS_RAW (val),
+ TYPE_LENGTH (VALUE_TYPE (val)),
+ v);
}
else
{
case BINOP_MOD:
/* Knuth 1.2.4, integer only. Note that unlike the C '%' op,
X mod 0 has a defined value, X. */
- /* start-sanitize-chill */
/* Chill specifies that v2 must be > 0, so check for that. */
if (current_language -> la_language == language_chill
&& v2 <= 0)
{
error ("Second operand of MOD must be greater than zero.");
}
- /* end-sanitize-chill */
if (v2 == 0)
{
v = v1;
case BINOP_MAX:
v = v1 > v2 ? v1 : v2;
break;
+
+ case BINOP_EQUAL:
+ v = v1 == v2;
+ break;
+
+ case BINOP_LESS:
+ v = v1 < v2;
+ break;
default:
error ("Invalid binary operation on numbers.");
}
-
- val = allocate_value (BUILTIN_TYPE_LONGEST);
- SWAP_TARGET_AND_HOST (&v, sizeof (v));
- *(LONGEST *) VALUE_CONTENTS_RAW (val) = v;
+
+ /* This is a kludge to get around the fact that we don't
+ know how to determine the result type from the types of
+ the operands. (I'm not really sure how much we feel the
+ need to duplicate the exact rules of the current
+ language. They can get really hairy. But not to do so
+ makes it hard to document just what we *do* do). */
+
+ /* Can't just call init_type because we wouldn't know what
+ name to give the type. */
+ val = allocate_value
+ (result_len > TARGET_LONG_BIT / HOST_CHAR_BIT
+ ? builtin_type_long_long
+ : builtin_type_long);
+ store_signed_integer (VALUE_CONTENTS_RAW (val),
+ TYPE_LENGTH (VALUE_TYPE (val)),
+ v);
}
}
int
value_logical_not (arg1)
- value arg1;
+ value_ptr arg1;
{
register int len;
register char *p;
int
value_equal (arg1, arg2)
- register value arg1, arg2;
+ register value_ptr arg1, arg2;
{
register int len;
code2 = TYPE_CODE (VALUE_TYPE (arg2));
if (code1 == TYPE_CODE_INT && code2 == TYPE_CODE_INT)
- return value_as_long (arg1) == value_as_long (arg2);
+ return longest_to_int (value_as_long (value_binop (arg1, arg2,
+ BINOP_EQUAL)));
else if ((code1 == TYPE_CODE_FLT || code1 == TYPE_CODE_INT)
&& (code2 == TYPE_CODE_FLT || code2 == TYPE_CODE_INT))
return value_as_double (arg1) == value_as_double (arg2);
int
value_less (arg1, arg2)
- register value arg1, arg2;
+ register value_ptr arg1, arg2;
{
register enum type_code code1;
register enum type_code code2;
code2 = TYPE_CODE (VALUE_TYPE (arg2));
if (code1 == TYPE_CODE_INT && code2 == TYPE_CODE_INT)
- {
- if (TYPE_UNSIGNED (VALUE_TYPE (arg1))
- || TYPE_UNSIGNED (VALUE_TYPE (arg2)))
- return ((unsigned LONGEST) value_as_long (arg1)
- < (unsigned LONGEST) value_as_long (arg2));
- else
- return value_as_long (arg1) < value_as_long (arg2);
- }
+ return longest_to_int (value_as_long (value_binop (arg1, arg2,
+ BINOP_LESS)));
else if ((code1 == TYPE_CODE_FLT || code1 == TYPE_CODE_INT)
&& (code2 == TYPE_CODE_FLT || code2 == TYPE_CODE_INT))
return value_as_double (arg1) < value_as_double (arg2);
\f
/* The unary operators - and ~. Both free the argument ARG1. */
-value
+value_ptr
value_neg (arg1)
- register value arg1;
+ register value_ptr arg1;
{
register struct type *type;
}
}
-value
+value_ptr
value_complement (arg1)
- register value arg1;
+ register value_ptr arg1;
{
COERCE_ENUM (arg1);
return value_from_longest (VALUE_TYPE (arg1), ~ value_as_long (arg1));
}
\f
+/* The INDEX'th bit of SET value whose VALUE_TYPE is TYPE,
+ and whose VALUE_CONTENTS is valaddr.
+ Return -1 if out of range, -2 other error. */
+
+int
+value_bit_index (type, valaddr, index)
+ struct type *type;
+ char *valaddr;
+ int index;
+{
+ struct type *range;
+ int low_bound, high_bound;
+ LONGEST word;
+ unsigned rel_index;
+ range = TYPE_FIELD_TYPE (type, 0);
+ if (TYPE_CODE (range) != TYPE_CODE_RANGE)
+ return -2;
+ low_bound = TYPE_LOW_BOUND (range);
+ high_bound = TYPE_HIGH_BOUND (range);
+ if (index < low_bound || index > high_bound)
+ return -1;
+ rel_index = index - low_bound;
+ word = unpack_long (builtin_type_unsigned_char,
+ valaddr + (rel_index / TARGET_CHAR_BIT));
+ rel_index %= TARGET_CHAR_BIT;
+ if (BITS_BIG_ENDIAN)
+ rel_index = TARGET_CHAR_BIT - 1 - rel_index;
+ return (word >> rel_index) & 1;
+}
+
+value_ptr
+value_in (element, set)
+ value_ptr element, set;
+{
+ int member;
+ if (TYPE_CODE (VALUE_TYPE (set)) != TYPE_CODE_SET)
+ error ("Second argument of 'IN' has wrong type");
+ if (TYPE_CODE (VALUE_TYPE (element)) != TYPE_CODE_INT
+ && TYPE_CODE (VALUE_TYPE (element)) != TYPE_CODE_CHAR
+ && TYPE_CODE (VALUE_TYPE (element)) != TYPE_CODE_ENUM
+ && TYPE_CODE (VALUE_TYPE (element)) != TYPE_CODE_BOOL)
+ error ("First argument of 'IN' has wrong type");
+ member = value_bit_index (VALUE_TYPE (set), VALUE_CONTENTS (set),
+ value_as_long (element));
+ if (member < 0)
+ error ("First argument of 'IN' not in range");
+ return value_from_longest (builtin_type_int, member);
+}
+
+void
+_initialize_valarith ()
+{
+}
projects / deliverable / binutils-gdb.git / blobdiff