/* 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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "value.h"
#include "gdbtypes.h"
#include "expression.h"
#include "target.h"
-#include <string.h>
+#include "language.h"
+#include "demangle.h"
+#include "gdb_string.h"
-static value
-value_subscripted_rvalue PARAMS ((value, value));
+/* Define whether or not the C operator '/' truncates towards zero for
+ differently signed operands (truncation direction is undefined in C). */
+
+#ifndef TRUNCATION_TOWARDS_ZERO
+#define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2)
+#endif
+
+static value_ptr value_subscripted_rvalue PARAMS ((value_ptr, value_ptr, int));
\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;
+ struct type *type1, *type2, *valptrtype;
- COERCE_ARRAY (arg1);
- COERCE_ARRAY (arg2);
+ COERCE_NUMBER (arg1);
+ COERCE_NUMBER (arg2);
+ type1 = check_typedef (VALUE_TYPE (arg1));
+ type2 = check_typedef (VALUE_TYPE (arg2));
- if ((TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_PTR
- || TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_PTR)
+ if ((TYPE_CODE (type1) == TYPE_CODE_PTR
+ || TYPE_CODE (type2) == TYPE_CODE_PTR)
&&
- (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_INT
- || TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_INT))
+ (TYPE_CODE (type1) == TYPE_CODE_INT
+ || TYPE_CODE (type2) == TYPE_CODE_INT))
/* Exactly one argument is a pointer, and one is an integer. */
{
- if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_PTR)
+ if (TYPE_CODE (type1) == TYPE_CODE_PTR)
{
valptr = arg1;
valint = arg2;
+ valptrtype = type1;
}
else
{
valptr = arg2;
valint = arg1;
+ valptrtype = type2;
}
- len = TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (valptr)));
+ len = TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (valptrtype)));
if (len == 0) len = 1; /* For (void *) */
- return value_from_longest (VALUE_TYPE (valptr),
+ return value_from_longest (valptrtype,
value_as_long (valptr)
+ (len * value_as_long (valint)));
}
return value_binop (arg1, arg2, BINOP_ADD);
}
-value
+value_ptr
value_sub (arg1, arg2)
- value arg1, arg2;
+ value_ptr arg1, arg2;
{
+ struct type *type1, *type2;
+ COERCE_NUMBER (arg1);
+ COERCE_NUMBER (arg2);
+ type1 = check_typedef (VALUE_TYPE (arg1));
+ type2 = check_typedef (VALUE_TYPE (arg2));
- COERCE_ARRAY (arg1);
- COERCE_ARRAY (arg2);
-
- if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_PTR)
+ if (TYPE_CODE (type1) == TYPE_CODE_PTR)
{
- if (TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_INT)
+ if (TYPE_CODE (type2) == TYPE_CODE_INT)
{
/* pointer - integer. */
+ LONGEST sz = TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type1)));
return value_from_longest
(VALUE_TYPE (arg1),
- value_as_long (arg1)
- - (TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (arg1)))
- * value_as_long (arg2)));
+ value_as_long (arg1) - (sz * value_as_long (arg2)));
}
- else if (VALUE_TYPE (arg1) == VALUE_TYPE (arg2))
+ else if (TYPE_CODE (type2) == TYPE_CODE_PTR
+ && TYPE_LENGTH (TYPE_TARGET_TYPE (type1))
+ == TYPE_LENGTH (TYPE_TARGET_TYPE (type2)))
{
/* pointer to <type x> - pointer to <type x>. */
+ LONGEST sz = TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type1)));
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))));
+ (value_as_long (arg1) - value_as_long (arg2)) / sz);
}
else
{
return value_binop (arg1, arg2, BINOP_SUB);
}
-/* Return the value of ARRAY[IDX]. */
+/* Return the value of ARRAY[IDX].
+ See comments in value_coerce_array() for rationale for reason for
+ doing lower bounds adjustment here rather than there.
+ 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;
{
- if (TYPE_CODE (VALUE_TYPE (array)) == TYPE_CODE_ARRAY
- && VALUE_LVAL (array) != lval_memory)
- return value_subscripted_rvalue (array, idx);
- else
+ value_ptr bound;
+ int c_style = current_language->c_style_arrays;
+ struct type *tarray;
+
+ COERCE_REF (array);
+ tarray = check_typedef (VALUE_TYPE (array));
+ COERCE_VARYING_ARRAY (array, tarray);
+
+ if (TYPE_CODE (tarray) == TYPE_CODE_ARRAY
+ || TYPE_CODE (tarray) == TYPE_CODE_STRING)
+ {
+ struct type *range_type = TYPE_INDEX_TYPE (tarray);
+ LONGEST lowerbound, upperbound;
+ get_discrete_bounds (range_type, &lowerbound, &upperbound);
+
+ if (VALUE_LVAL (array) != lval_memory)
+ return value_subscripted_rvalue (array, idx, lowerbound);
+
+ if (c_style == 0)
+ {
+ LONGEST index = value_as_long (idx);
+ if (index >= lowerbound && index <= upperbound)
+ return value_subscripted_rvalue (array, idx, lowerbound);
+ warning ("array or string index out of range");
+ /* fall doing C stuff */
+ c_style = 1;
+ }
+
+ if (lowerbound != 0)
+ {
+ bound = value_from_longest (builtin_type_int, (LONGEST) lowerbound);
+ idx = value_sub (idx, bound);
+ }
+
+ array = value_coerce_array (array);
+ }
+
+ if (TYPE_CODE (tarray) == TYPE_CODE_BITSTRING)
+ {
+ struct type *range_type = TYPE_INDEX_TYPE (tarray);
+ LONGEST index = value_as_long (idx);
+ value_ptr v;
+ int offset, byte, bit_index;
+ LONGEST lowerbound, upperbound;
+ get_discrete_bounds (range_type, &lowerbound, &upperbound);
+ if (index < lowerbound || index > upperbound)
+ error ("bitstring index out of range");
+ index -= lowerbound;
+ offset = index / TARGET_CHAR_BIT;
+ byte = *((char*)VALUE_CONTENTS (array) + offset);
+ bit_index = index % TARGET_CHAR_BIT;
+ byte >>= (BITS_BIG_ENDIAN ? TARGET_CHAR_BIT - 1 - bit_index : bit_index);
+ v = value_from_longest (LA_BOOL_TYPE, byte & 1);
+ VALUE_BITPOS (v) = bit_index;
+ VALUE_BITSIZE (v) = 1;
+ VALUE_LVAL (v) = VALUE_LVAL (array);
+ if (VALUE_LVAL (array) == lval_internalvar)
+ VALUE_LVAL (v) = lval_internalvar_component;
+ VALUE_ADDRESS (v) = VALUE_ADDRESS (array);
+ VALUE_OFFSET (v) = offset + VALUE_OFFSET (array);
+ return v;
+ }
+
+ if (c_style)
return value_ind (value_add (array, idx));
+ else
+ error ("not an array or string");
}
/* Return the value of EXPR[IDX], expr an aggregate rvalue
(eg, a vector register). This routine used to promote floats
to doubles, but no longer does. */
-static value
-value_subscripted_rvalue (array, idx)
- value array, idx;
+static value_ptr
+value_subscripted_rvalue (array, idx, lowerbound)
+ value_ptr array, idx;
+ int lowerbound;
{
- 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;
-
- if (elt_offs >= TYPE_LENGTH (VALUE_TYPE (array)))
+ struct type *array_type = check_typedef (VALUE_TYPE (array));
+ struct type *elt_type = check_typedef (TYPE_TARGET_TYPE (array_type));
+ unsigned int elt_size = TYPE_LENGTH (elt_type);
+ LONGEST index = value_as_long (idx);
+ unsigned int elt_offs = elt_size * longest_to_int (index - lowerbound);
+ value_ptr v;
+
+ if (index < lowerbound || elt_offs >= TYPE_LENGTH (array_type))
error ("no such vector element");
v = allocate_value (elt_type);
- memcpy (VALUE_CONTENTS (v), VALUE_CONTENTS (array) + elt_offs, elt_size);
+ if (VALUE_LAZY (array))
+ VALUE_LAZY (v) = 1;
+ else
+ memcpy (VALUE_CONTENTS (v), VALUE_CONTENTS (array) + elt_offs, elt_size);
if (VALUE_LVAL (array) == lval_internalvar)
VALUE_LVAL (v) = lval_internalvar_component;
else
- VALUE_LVAL (v) = not_lval;
+ VALUE_LVAL (v) = VALUE_LVAL (array);
VALUE_ADDRESS (v) = VALUE_ADDRESS (array);
VALUE_OFFSET (v) = VALUE_OFFSET (array) + elt_offs;
- VALUE_BITSIZE (v) = elt_size * 8;
return v;
}
\f
int
binop_user_defined_p (op, arg1, arg2)
enum exp_opcode op;
- value arg1, arg2;
+ value_ptr arg1, arg2;
{
- if (op == BINOP_ASSIGN)
+ struct type *type1, *type2;
+ if (op == BINOP_ASSIGN || op == BINOP_CONCAT)
return 0;
- return (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_STRUCT
- || TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_STRUCT
- || (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_REF
- && TYPE_CODE (TYPE_TARGET_TYPE (VALUE_TYPE (arg1))) == TYPE_CODE_STRUCT)
- || (TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_REF
- && TYPE_CODE (TYPE_TARGET_TYPE (VALUE_TYPE (arg2))) == TYPE_CODE_STRUCT));
+ type1 = check_typedef (VALUE_TYPE (arg1));
+ type2 = check_typedef (VALUE_TYPE (arg2));
+ return (TYPE_CODE (type1) == TYPE_CODE_STRUCT
+ || TYPE_CODE (type2) == TYPE_CODE_STRUCT
+ || (TYPE_CODE (type1) == TYPE_CODE_REF
+ && TYPE_CODE (TYPE_TARGET_TYPE (type1)) == TYPE_CODE_STRUCT)
+ || (TYPE_CODE (type2) == TYPE_CODE_REF
+ && TYPE_CODE (TYPE_TARGET_TYPE (type2)) == TYPE_CODE_STRUCT));
}
/* Check to see if argument is a structure. This is called so
int unop_user_defined_p (op, arg1)
enum exp_opcode op;
- value arg1;
+ value_ptr arg1;
{
+ struct type *type1;
if (op == UNOP_ADDR)
return 0;
- return (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_STRUCT
- || (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_REF
- && TYPE_CODE (TYPE_TARGET_TYPE (VALUE_TYPE (arg1))) == TYPE_CODE_STRUCT));
+ type1 = check_typedef (VALUE_TYPE (arg1));
+ for (;;)
+ {
+ if (TYPE_CODE (type1) == TYPE_CODE_STRUCT)
+ return 1;
+ else if (TYPE_CODE (type1) == TYPE_CODE_REF)
+ type1 = TYPE_TARGET_TYPE (type1);
+ else
+ return 0;
+ }
}
/* We know either arg1 or arg2 is a structure, so try to find the right
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;
/* now we know that what we have to do is construct our
arg vector and find the right function to call it with. */
- if (TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_STRUCT)
+ if (TYPE_CODE (check_typedef (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;
case BINOP_BITWISE_AND: strcpy(ptr,"&="); break;
case BINOP_BITWISE_IOR: strcpy(ptr,"|="); break;
case BINOP_BITWISE_XOR: strcpy(ptr,"^="); break;
+ case BINOP_MOD: /* invalid */
default:
error ("Invalid binary operation specified.");
}
case BINOP_GTR: strcpy(ptr,">"); break;
case BINOP_GEQ: strcpy(ptr,">="); break;
case BINOP_LEQ: strcpy(ptr,"<="); break;
+ case BINOP_MOD: /* invalid */
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_REF (arg1);
COERCE_ENUM (arg1);
/* now we know that what we have to do is construct our
arg vector and find the right function to call it with. */
- if (TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_STRUCT)
+ if (TYPE_CODE (check_typedef (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)
error ("member function %s not found", tstr);
return 0; /* For lint -- never reached */
}
+
\f
-/* Perform a binary operation on two integers or two floats.
+/* Concatenate two values with the following conditions:
+
+ (1) Both values must be either bitstring values or character string
+ values and the resulting value consists of the concatenation of
+ ARG1 followed by ARG2.
+
+ or
+
+ One value must be an integer value and the other value must be
+ either a bitstring value or character string value, which is
+ to be repeated by the number of times specified by the integer
+ value.
+
+
+ (2) Boolean values are also allowed and are treated as bit string
+ values of length 1.
+
+ (3) Character values are also allowed and are treated as character
+ string values of length 1.
+*/
+
+value_ptr
+value_concat (arg1, arg2)
+ value_ptr arg1, arg2;
+{
+ register value_ptr inval1, inval2, outval;
+ int inval1len, inval2len;
+ int count, idx;
+ char *ptr;
+ char inchar;
+ struct type *type1 = check_typedef (VALUE_TYPE (arg1));
+ struct type *type2 = check_typedef (VALUE_TYPE (arg2));
+
+ COERCE_VARYING_ARRAY (arg1, type1);
+ COERCE_VARYING_ARRAY (arg2, type2);
+
+ /* First figure out if we are dealing with two values to be concatenated
+ or a repeat count and a value to be repeated. INVAL1 is set to the
+ first of two concatenated values, or the repeat count. INVAL2 is set
+ to the second of the two concatenated values or the value to be
+ repeated. */
+
+ if (TYPE_CODE (type2) == TYPE_CODE_INT)
+ {
+ struct type *tmp = type1;
+ type1 = tmp;
+ tmp = type2;
+ inval1 = arg2;
+ inval2 = arg1;
+ }
+ else
+ {
+ inval1 = arg1;
+ inval2 = arg2;
+ }
+
+ /* Now process the input values. */
+
+ if (TYPE_CODE (type1) == TYPE_CODE_INT)
+ {
+ /* We have a repeat count. Validate the second value and then
+ construct a value repeated that many times. */
+ if (TYPE_CODE (type2) == TYPE_CODE_STRING
+ || TYPE_CODE (type2) == TYPE_CODE_CHAR)
+ {
+ count = longest_to_int (value_as_long (inval1));
+ inval2len = TYPE_LENGTH (type2);
+ ptr = (char *) alloca (count * inval2len);
+ if (TYPE_CODE (type2) == TYPE_CODE_CHAR)
+ {
+ inchar = (char) unpack_long (type2,
+ VALUE_CONTENTS (inval2));
+ for (idx = 0; idx < count; idx++)
+ {
+ *(ptr + idx) = inchar;
+ }
+ }
+ else
+ {
+ for (idx = 0; idx < count; idx++)
+ {
+ memcpy (ptr + (idx * inval2len), VALUE_CONTENTS (inval2),
+ inval2len);
+ }
+ }
+ outval = value_string (ptr, count * inval2len);
+ }
+ else if (TYPE_CODE (type2) == TYPE_CODE_BITSTRING
+ || TYPE_CODE (type2) == TYPE_CODE_BOOL)
+ {
+ error ("unimplemented support for bitstring/boolean repeats");
+ }
+ else
+ {
+ error ("can't repeat values of that type");
+ }
+ }
+ else if (TYPE_CODE (type1) == TYPE_CODE_STRING
+ || TYPE_CODE (type1) == TYPE_CODE_CHAR)
+ {
+ /* We have two character strings to concatenate. */
+ if (TYPE_CODE (type2) != TYPE_CODE_STRING
+ && TYPE_CODE (type2) != TYPE_CODE_CHAR)
+ {
+ error ("Strings can only be concatenated with other strings.");
+ }
+ inval1len = TYPE_LENGTH (type1);
+ inval2len = TYPE_LENGTH (type2);
+ ptr = (char *) alloca (inval1len + inval2len);
+ if (TYPE_CODE (type1) == TYPE_CODE_CHAR)
+ {
+ *ptr = (char) unpack_long (type1, VALUE_CONTENTS (inval1));
+ }
+ else
+ {
+ memcpy (ptr, VALUE_CONTENTS (inval1), inval1len);
+ }
+ if (TYPE_CODE (type2) == TYPE_CODE_CHAR)
+ {
+ *(ptr + inval1len) =
+ (char) unpack_long (type2, VALUE_CONTENTS (inval2));
+ }
+ else
+ {
+ memcpy (ptr + inval1len, VALUE_CONTENTS (inval2), inval2len);
+ }
+ outval = value_string (ptr, inval1len + inval2len);
+ }
+ else if (TYPE_CODE (type1) == TYPE_CODE_BITSTRING
+ || TYPE_CODE (type1) == TYPE_CODE_BOOL)
+ {
+ /* We have two bitstrings to concatenate. */
+ if (TYPE_CODE (type2) != TYPE_CODE_BITSTRING
+ && TYPE_CODE (type2) != TYPE_CODE_BOOL)
+ {
+ error ("Bitstrings or booleans can only be concatenated with other bitstrings or booleans.");
+ }
+ error ("unimplemented support for bitstring/boolean concatenation.");
+ }
+ else
+ {
+ /* We don't know how to concatenate these operands. */
+ error ("illegal operands for concatenation.");
+ }
+ return (outval);
+}
+
+\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;
+ struct type *type1, *type2;
+ COERCE_REF (arg1);
+ COERCE_REF (arg2);
COERCE_ENUM (arg1);
COERCE_ENUM (arg2);
-
- if ((TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_FLT
- &&
- TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_INT
- &&
- TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_BOOL)
+ type1 = check_typedef (VALUE_TYPE (arg1));
+ type2 = check_typedef (VALUE_TYPE (arg2));
+
+ if ((TYPE_CODE (type1) != TYPE_CODE_FLT
+ && TYPE_CODE (type1) != TYPE_CODE_CHAR
+ && TYPE_CODE (type1) != TYPE_CODE_INT
+ && TYPE_CODE (type1) != TYPE_CODE_BOOL
+ && TYPE_CODE (type1) != TYPE_CODE_RANGE)
||
- (TYPE_CODE (VALUE_TYPE (arg2)) != TYPE_CODE_FLT
- &&
- TYPE_CODE (VALUE_TYPE (arg2)) != TYPE_CODE_INT
- &&
- TYPE_CODE (VALUE_TYPE (arg2)) != TYPE_CODE_BOOL))
+ (TYPE_CODE (type2) != TYPE_CODE_FLT
+ && TYPE_CODE (type2) != TYPE_CODE_CHAR
+ && TYPE_CODE (type2) != TYPE_CODE_INT
+ && TYPE_CODE (type2) != TYPE_CODE_BOOL
+ && TYPE_CODE (type2) != TYPE_CODE_RANGE))
error ("Argument to arithmetic operation not a number or boolean.");
- if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_FLT
+ if (TYPE_CODE (type1) == TYPE_CODE_FLT
||
- TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_FLT)
+ TYPE_CODE (type2) == TYPE_CODE_FLT)
{
- double v1, v2, v;
+ /* FIXME-if-picky-about-floating-accuracy: Should be doing this
+ in target format. real.c in GCC probably has the necessary
+ code. */
+ DOUBLEST v1, v2, v;
v1 = value_as_double (arg1);
v2 = value_as_double (arg2);
switch (op)
error ("Integer-only operation on floating point number.");
}
- val = allocate_value (builtin_type_double);
- SWAP_TARGET_AND_HOST (&v, sizeof (v));
- *(double *) VALUE_CONTENTS_RAW (val) = v;
+ /* If either arg was long double, make sure that value is also long
+ double. */
+
+ if (TYPE_LENGTH(type1) * 8 > TARGET_DOUBLE_BIT
+ || TYPE_LENGTH(type2) * 8 > TARGET_DOUBLE_BIT)
+ val = allocate_value (builtin_type_long_double);
+ else
+ val = allocate_value (builtin_type_double);
+
+ store_floating (VALUE_CONTENTS_RAW (val), TYPE_LENGTH (VALUE_TYPE (val)),
+ v);
}
- else if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_BOOL
+ else if (TYPE_CODE (type1) == TYPE_CODE_BOOL
&&
- TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_BOOL)
+ TYPE_CODE (type2) == TYPE_CODE_BOOL)
{
LONGEST v1, v2, v;
v1 = value_as_long (arg1);
error ("Invalid operation on booleans.");
}
- val = allocate_value (builtin_type_chill_bool);
- SWAP_TARGET_AND_HOST (&v, sizeof (v));
- *(LONGEST *) VALUE_CONTENTS_RAW (val) = v;
+ val = allocate_value (type1);
+ store_signed_integer (VALUE_CONTENTS_RAW (val),
+ TYPE_LENGTH (type1),
+ 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)))
+ unsigned int promoted_len1 = TYPE_LENGTH (type1);
+ unsigned int promoted_len2 = TYPE_LENGTH (type2);
+ int is_unsigned1 = TYPE_UNSIGNED (type1);
+ int is_unsigned2 = TYPE_UNSIGNED (type2);
+ unsigned 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)
{
v = v1 % v2;
break;
+ case BINOP_MOD:
+ /* Knuth 1.2.4, integer only. Note that unlike the C '%' op,
+ v1 mod 0 has a defined value, v1. */
+ /* 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.");
+ }
+ if (v2 == 0)
+ {
+ v = v1;
+ }
+ else
+ {
+ v = v1/v2;
+ /* Note floor(v1/v2) == v1/v2 for unsigned. */
+ v = v1 - (v2 * v);
+ }
+ break;
+
case BINOP_LSH:
v = v1 << v2;
break;
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
{
v = v1 % v2;
break;
+ case BINOP_MOD:
+ /* Knuth 1.2.4, integer only. Note that unlike the C '%' op,
+ X mod 0 has a defined value, X. */
+ /* 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.");
+ }
+ if (v2 == 0)
+ {
+ v = v1;
+ }
+ else
+ {
+ v = v1/v2;
+ /* Compute floor. */
+ if (TRUNCATION_TOWARDS_ZERO && (v < 0) && ((v1 % v2) != 0))
+ {
+ v--;
+ }
+ v = v1 - (v2 * v);
+ }
+ break;
+
case BINOP_LSH:
v = v1 << v2;
break;
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;
+ struct type *type1;
- COERCE_ARRAY (arg1);
+ COERCE_NUMBER (arg1);
+ type1 = check_typedef (VALUE_TYPE (arg1));
- if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_FLT)
+ if (TYPE_CODE (type1) == TYPE_CODE_FLT)
return 0 == value_as_double (arg1);
- len = TYPE_LENGTH (VALUE_TYPE (arg1));
+ len = TYPE_LENGTH (type1);
p = VALUE_CONTENTS (arg1);
while (--len >= 0)
int
value_equal (arg1, arg2)
- register value arg1, arg2;
+ register value_ptr arg1, arg2;
{
register int len;
register char *p1, *p2;
+ struct type *type1, *type2;
enum type_code code1;
enum type_code code2;
- COERCE_ARRAY (arg1);
- COERCE_ARRAY (arg2);
+ COERCE_NUMBER (arg1);
+ COERCE_NUMBER (arg2);
- code1 = TYPE_CODE (VALUE_TYPE (arg1));
- code2 = TYPE_CODE (VALUE_TYPE (arg2));
+ type1 = check_typedef (VALUE_TYPE (arg1));
+ type2 = check_typedef (VALUE_TYPE (arg2));
+ code1 = TYPE_CODE (type1);
+ code2 = TYPE_CODE (type2);
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);
return (CORE_ADDR) value_as_long (arg1) == value_as_pointer (arg2);
else if (code1 == code2
- && ((len = TYPE_LENGTH (VALUE_TYPE (arg1)))
- == TYPE_LENGTH (VALUE_TYPE (arg2))))
+ && ((len = (int) TYPE_LENGTH (type1))
+ == (int) TYPE_LENGTH (type2)))
{
p1 = VALUE_CONTENTS (arg1);
p2 = VALUE_CONTENTS (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;
+ struct type *type1, *type2;
- COERCE_ARRAY (arg1);
- COERCE_ARRAY (arg2);
+ COERCE_NUMBER (arg1);
+ COERCE_NUMBER (arg2);
- code1 = TYPE_CODE (VALUE_TYPE (arg1));
- code2 = TYPE_CODE (VALUE_TYPE (arg2));
+ type1 = check_typedef (VALUE_TYPE (arg1));
+ type2 = check_typedef (VALUE_TYPE (arg2));
+ code1 = TYPE_CODE (type1);
+ code2 = TYPE_CODE (type2);
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;
+ COERCE_REF (arg1);
COERCE_ENUM (arg1);
- type = VALUE_TYPE (arg1);
+ type = check_typedef (VALUE_TYPE (arg1));
if (TYPE_CODE (type) == TYPE_CODE_FLT)
return value_from_double (type, - value_as_double (arg1));
}
}
-value
+value_ptr
value_complement (arg1)
- register value arg1;
+ register value_ptr arg1;
{
+ COERCE_REF (arg1);
COERCE_ENUM (arg1);
- if (TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_INT)
+ if (TYPE_CODE (check_typedef (VALUE_TYPE (arg1))) != TYPE_CODE_INT)
error ("Argument to complement operation not an integer.");
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;
+{
+ LONGEST low_bound, high_bound;
+ LONGEST word;
+ unsigned rel_index;
+ struct type *range = TYPE_FIELD_TYPE (type, 0);
+ if (get_discrete_bounds (range, &low_bound, &high_bound) < 0)
+ return -2;
+ 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;
+ struct type *settype = check_typedef (VALUE_TYPE (set));
+ struct type *eltype = check_typedef (VALUE_TYPE (element));
+ if (TYPE_CODE (eltype) == TYPE_CODE_RANGE)
+ eltype = TYPE_TARGET_TYPE (eltype);
+ if (TYPE_CODE (settype) != TYPE_CODE_SET)
+ error ("Second argument of 'IN' has wrong type");
+ if (TYPE_CODE (eltype) != TYPE_CODE_INT
+ && TYPE_CODE (eltype) != TYPE_CODE_CHAR
+ && TYPE_CODE (eltype) != TYPE_CODE_ENUM
+ && TYPE_CODE (eltype) != TYPE_CODE_BOOL)
+ error ("First argument of 'IN' has wrong type");
+ member = value_bit_index (settype, VALUE_CONTENTS (set),
+ value_as_long (element));
+ if (member < 0)
+ error ("First argument of 'IN' not in range");
+ return value_from_longest (LA_BOOL_TYPE, member);
+}
+
+void
+_initialize_valarith ()
+{
+}
projects / deliverable / binutils-gdb.git / blobdiff