2fcc38b81f
an integral number of times. * language.c (binop_type_check): Extend BINOP_CONCAT for self concatenation case. * valarith.c (value_concat): Rewrite to support self concatenation an integral number of times. **** start-sanitize-chill **** * Makefile.in (ch-exp.tab.c): Change "expect" message. * ch-exp.y (FIXME's): Make all FIXME tokens distinct, to eliminate hundreds of spurious shift/reduce and reduce/reduce conflicts that mask the 5 real ones. * ch-exp.y (STRING, CONSTANT, SC): Remove unused tokens. * ch-exp.y (integer_literal_expression): Remove production, no longer used. **** end-sanitize-chill ****
970 lines
26 KiB
C
970 lines
26 KiB
C
/* Perform arithmetic and other operations on values, for GDB.
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Copyright 1986, 1989, 1991, 1992 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "value.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "target.h"
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#include "language.h"
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#include <string.h>
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/* Define whether or not the C operator '/' truncates towards zero for
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differently signed operands (truncation direction is undefined in C). */
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#ifndef TRUNCATION_TOWARDS_ZERO
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#define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2)
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#endif
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static value
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value_subscripted_rvalue PARAMS ((value, value));
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value
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value_add (arg1, arg2)
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value arg1, arg2;
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{
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register value valint, valptr;
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register int len;
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COERCE_ARRAY (arg1);
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COERCE_ARRAY (arg2);
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if ((TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_PTR
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|| TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_PTR)
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&&
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(TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_INT
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|| TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_INT))
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/* Exactly one argument is a pointer, and one is an integer. */
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{
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if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_PTR)
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{
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valptr = arg1;
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valint = arg2;
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}
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else
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{
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valptr = arg2;
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valint = arg1;
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}
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len = TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (valptr)));
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if (len == 0) len = 1; /* For (void *) */
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return value_from_longest (VALUE_TYPE (valptr),
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value_as_long (valptr)
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+ (len * value_as_long (valint)));
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}
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return value_binop (arg1, arg2, BINOP_ADD);
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}
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value
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value_sub (arg1, arg2)
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value arg1, arg2;
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{
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COERCE_ARRAY (arg1);
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COERCE_ARRAY (arg2);
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if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_PTR)
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{
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if (TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_INT)
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{
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/* pointer - integer. */
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return value_from_longest
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(VALUE_TYPE (arg1),
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value_as_long (arg1)
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- (TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (arg1)))
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* value_as_long (arg2)));
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}
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else if (VALUE_TYPE (arg1) == VALUE_TYPE (arg2))
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{
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/* pointer to <type x> - pointer to <type x>. */
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return value_from_longest
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(builtin_type_long, /* FIXME -- should be ptrdiff_t */
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(value_as_long (arg1) - value_as_long (arg2))
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/ TYPE_LENGTH (TYPE_TARGET_TYPE (VALUE_TYPE (arg1))));
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}
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else
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{
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error ("\
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First argument of `-' is a pointer and second argument is neither\n\
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an integer nor a pointer of the same type.");
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}
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}
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return value_binop (arg1, arg2, BINOP_SUB);
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}
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/* Return the value of ARRAY[IDX].
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See comments in value_coerce_array() for rationale for reason for
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doing lower bounds adjustment here rather than there.
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FIXME: Perhaps we should validate that the index is valid and if
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verbosity is set, warn about invalid indices (but still use them). */
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value
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value_subscript (array, idx)
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value array, idx;
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{
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int lowerbound;
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value bound;
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struct type *range_type;
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if (TYPE_CODE (VALUE_TYPE (array)) == TYPE_CODE_ARRAY)
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{
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range_type = TYPE_FIELD_TYPE (VALUE_TYPE (array), 0);
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lowerbound = TYPE_FIELD_BITPOS (range_type, 0);
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if (lowerbound != 0)
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{
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bound = value_from_longest (builtin_type_int, (LONGEST) lowerbound);
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idx = value_sub (idx, bound);
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}
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if (VALUE_LVAL (array) != lval_memory)
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{
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return value_subscripted_rvalue (array, idx);
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}
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}
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return value_ind (value_add (array, idx));
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}
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/* Return the value of EXPR[IDX], expr an aggregate rvalue
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(eg, a vector register). This routine used to promote floats
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to doubles, but no longer does. */
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static value
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value_subscripted_rvalue (array, idx)
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value array, idx;
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{
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struct type *elt_type = TYPE_TARGET_TYPE (VALUE_TYPE (array));
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int elt_size = TYPE_LENGTH (elt_type);
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int elt_offs = elt_size * longest_to_int (value_as_long (idx));
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value v;
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if (elt_offs >= TYPE_LENGTH (VALUE_TYPE (array)))
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error ("no such vector element");
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v = allocate_value (elt_type);
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memcpy (VALUE_CONTENTS (v), VALUE_CONTENTS (array) + elt_offs, elt_size);
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if (VALUE_LVAL (array) == lval_internalvar)
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VALUE_LVAL (v) = lval_internalvar_component;
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else
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VALUE_LVAL (v) = not_lval;
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VALUE_ADDRESS (v) = VALUE_ADDRESS (array);
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VALUE_OFFSET (v) = VALUE_OFFSET (array) + elt_offs;
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VALUE_BITSIZE (v) = elt_size * 8;
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return v;
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}
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/* Check to see if either argument is a structure. This is called so
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we know whether to go ahead with the normal binop or look for a
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user defined function instead.
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For now, we do not overload the `=' operator. */
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int
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binop_user_defined_p (op, arg1, arg2)
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enum exp_opcode op;
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value arg1, arg2;
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{
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if (op == BINOP_ASSIGN)
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return 0;
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return (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_STRUCT
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|| TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_STRUCT
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|| (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_REF
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&& TYPE_CODE (TYPE_TARGET_TYPE (VALUE_TYPE (arg1))) == TYPE_CODE_STRUCT)
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|| (TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_REF
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&& TYPE_CODE (TYPE_TARGET_TYPE (VALUE_TYPE (arg2))) == TYPE_CODE_STRUCT));
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}
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/* Check to see if argument is a structure. This is called so
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we know whether to go ahead with the normal unop or look for a
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user defined function instead.
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For now, we do not overload the `&' operator. */
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int unop_user_defined_p (op, arg1)
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enum exp_opcode op;
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value arg1;
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{
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if (op == UNOP_ADDR)
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return 0;
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return (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_STRUCT
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|| (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_REF
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&& TYPE_CODE (TYPE_TARGET_TYPE (VALUE_TYPE (arg1))) == TYPE_CODE_STRUCT));
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}
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/* We know either arg1 or arg2 is a structure, so try to find the right
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user defined function. Create an argument vector that calls
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arg1.operator @ (arg1,arg2) and return that value (where '@' is any
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binary operator which is legal for GNU C++).
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OP is the operatore, and if it is BINOP_ASSIGN_MODIFY, then OTHEROP
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is the opcode saying how to modify it. Otherwise, OTHEROP is
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unused. */
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value
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value_x_binop (arg1, arg2, op, otherop)
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value arg1, arg2;
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enum exp_opcode op, otherop;
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{
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value * argvec;
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char *ptr;
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char tstr[13];
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int static_memfuncp;
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COERCE_REF (arg1);
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COERCE_REF (arg2);
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COERCE_ENUM (arg1);
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COERCE_ENUM (arg2);
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/* now we know that what we have to do is construct our
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arg vector and find the right function to call it with. */
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if (TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_STRUCT)
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error ("Can't do that binary op on that type"); /* FIXME be explicit */
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argvec = (value *) alloca (sizeof (value) * 4);
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argvec[1] = value_addr (arg1);
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argvec[2] = arg2;
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argvec[3] = 0;
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/* make the right function name up */
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strcpy(tstr, "operator__");
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ptr = tstr+8;
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switch (op)
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{
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case BINOP_ADD: strcpy(ptr,"+"); break;
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case BINOP_SUB: strcpy(ptr,"-"); break;
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case BINOP_MUL: strcpy(ptr,"*"); break;
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case BINOP_DIV: strcpy(ptr,"/"); break;
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case BINOP_REM: strcpy(ptr,"%"); break;
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case BINOP_LSH: strcpy(ptr,"<<"); break;
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case BINOP_RSH: strcpy(ptr,">>"); break;
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case BINOP_BITWISE_AND: strcpy(ptr,"&"); break;
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case BINOP_BITWISE_IOR: strcpy(ptr,"|"); break;
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case BINOP_BITWISE_XOR: strcpy(ptr,"^"); break;
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case BINOP_LOGICAL_AND: strcpy(ptr,"&&"); break;
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case BINOP_LOGICAL_OR: strcpy(ptr,"||"); break;
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case BINOP_MIN: strcpy(ptr,"<?"); break;
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case BINOP_MAX: strcpy(ptr,">?"); break;
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case BINOP_ASSIGN: strcpy(ptr,"="); break;
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case BINOP_ASSIGN_MODIFY:
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switch (otherop)
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{
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case BINOP_ADD: strcpy(ptr,"+="); break;
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case BINOP_SUB: strcpy(ptr,"-="); break;
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case BINOP_MUL: strcpy(ptr,"*="); break;
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case BINOP_DIV: strcpy(ptr,"/="); break;
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case BINOP_REM: strcpy(ptr,"%="); break;
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case BINOP_BITWISE_AND: strcpy(ptr,"&="); break;
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case BINOP_BITWISE_IOR: strcpy(ptr,"|="); break;
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case BINOP_BITWISE_XOR: strcpy(ptr,"^="); break;
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case BINOP_MOD: /* invalid */
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default:
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error ("Invalid binary operation specified.");
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}
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break;
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case BINOP_SUBSCRIPT: strcpy(ptr,"[]"); break;
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case BINOP_EQUAL: strcpy(ptr,"=="); break;
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case BINOP_NOTEQUAL: strcpy(ptr,"!="); break;
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case BINOP_LESS: strcpy(ptr,"<"); break;
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case BINOP_GTR: strcpy(ptr,">"); break;
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case BINOP_GEQ: strcpy(ptr,">="); break;
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case BINOP_LEQ: strcpy(ptr,"<="); break;
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case BINOP_MOD: /* invalid */
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default:
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error ("Invalid binary operation specified.");
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}
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argvec[0] = value_struct_elt (&arg1, argvec+1, tstr, &static_memfuncp, "structure");
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if (argvec[0])
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{
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if (static_memfuncp)
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{
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argvec[1] = argvec[0];
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argvec++;
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}
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return call_function_by_hand (argvec[0], 2 - static_memfuncp, argvec + 1);
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}
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error ("member function %s not found", tstr);
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#ifdef lint
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return call_function_by_hand (argvec[0], 2 - static_memfuncp, argvec + 1);
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#endif
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}
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/* We know that arg1 is a structure, so try to find a unary user
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defined operator that matches the operator in question.
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Create an argument vector that calls arg1.operator @ (arg1)
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and return that value (where '@' is (almost) any unary operator which
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is legal for GNU C++). */
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value
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value_x_unop (arg1, op)
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value arg1;
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enum exp_opcode op;
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{
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value * argvec;
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char *ptr;
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char tstr[13];
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int static_memfuncp;
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COERCE_ENUM (arg1);
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/* now we know that what we have to do is construct our
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arg vector and find the right function to call it with. */
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if (TYPE_CODE (VALUE_TYPE (arg1)) != TYPE_CODE_STRUCT)
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error ("Can't do that unary op on that type"); /* FIXME be explicit */
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argvec = (value *) alloca (sizeof (value) * 3);
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argvec[1] = value_addr (arg1);
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argvec[2] = 0;
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/* make the right function name up */
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strcpy(tstr,"operator__");
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ptr = tstr+8;
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switch (op)
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{
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case UNOP_PREINCREMENT: strcpy(ptr,"++"); break;
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case UNOP_PREDECREMENT: strcpy(ptr,"++"); break;
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case UNOP_POSTINCREMENT: strcpy(ptr,"++"); break;
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case UNOP_POSTDECREMENT: strcpy(ptr,"++"); break;
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case UNOP_LOGICAL_NOT: strcpy(ptr,"!"); break;
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case UNOP_COMPLEMENT: strcpy(ptr,"~"); break;
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case UNOP_NEG: strcpy(ptr,"-"); break;
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default:
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error ("Invalid binary operation specified.");
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}
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argvec[0] = value_struct_elt (&arg1, argvec+1, tstr, &static_memfuncp, "structure");
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if (argvec[0])
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{
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if (static_memfuncp)
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{
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argvec[1] = argvec[0];
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argvec++;
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}
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return call_function_by_hand (argvec[0], 1 - static_memfuncp, argvec + 1);
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}
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error ("member function %s not found", tstr);
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return 0; /* For lint -- never reached */
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}
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/* Concatenate two values with the following conditions:
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(1) Both values must be either bitstring values or character string
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values and the resulting value consists of the concatenation of
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ARG1 followed by ARG2.
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or
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One value must be an integer value and the other value must be
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either a bitstring value or character string value, which is
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to be repeated by the number of times specified by the integer
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value.
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(2) Boolean values are also allowed and are treated as bit string
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values of length 1.
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(3) Character values are also allowed and are treated as character
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string values of length 1.
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*/
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value
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value_concat (arg1, arg2)
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value arg1, arg2;
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{
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register value inval1, inval2, outval;
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int inval1len, inval2len;
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int count, idx;
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char *ptr;
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char inchar;
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/* First figure out if we are dealing with two values to be concatenated
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or a repeat count and a value to be repeated. INVAL1 is set to the
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first of two concatenated values, or the repeat count. INVAL2 is set
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to the second of the two concatenated values or the value to be
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repeated. */
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if (TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_INT)
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{
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inval1 = arg2;
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inval2 = arg1;
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}
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else
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{
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inval1 = arg1;
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inval2 = arg2;
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}
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/* Now process the input values. */
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if (TYPE_CODE (VALUE_TYPE (inval1)) == TYPE_CODE_INT)
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{
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/* We have a repeat count. Validate the second value and then
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construct a value repeated that many times. */
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if (TYPE_CODE (VALUE_TYPE (inval2)) == TYPE_CODE_STRING
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|| TYPE_CODE (VALUE_TYPE (inval2)) == TYPE_CODE_CHAR)
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{
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count = longest_to_int (value_as_long (inval1));
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inval2len = TYPE_LENGTH (VALUE_TYPE (inval2));
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ptr = (char *) alloca (count * inval2len);
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if (TYPE_CODE (VALUE_TYPE (inval2)) == TYPE_CODE_CHAR)
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{
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inchar = (char) unpack_long (VALUE_TYPE (inval2),
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VALUE_CONTENTS (inval2));
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for (idx = 0; idx < count; idx++)
|
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{
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*(ptr + idx) = inchar;
|
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}
|
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}
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else
|
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{
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for (idx = 0; idx < count; idx++)
|
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{
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memcpy (ptr + (idx * inval2len), VALUE_CONTENTS (inval2),
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inval2len);
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}
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}
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outval = value_string (ptr, count * inval2len);
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}
|
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else if (TYPE_CODE (VALUE_TYPE (inval2)) == TYPE_CODE_BITSTRING
|
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|| TYPE_CODE (VALUE_TYPE (inval2)) == TYPE_CODE_BOOL)
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{
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error ("unimplemented support for bitstring/boolean repeats");
|
||
}
|
||
else
|
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{
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error ("can't repeat values of that type");
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||
}
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||
}
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else if (TYPE_CODE (VALUE_TYPE (inval1)) == TYPE_CODE_STRING
|
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|| TYPE_CODE (VALUE_TYPE (inval1)) == TYPE_CODE_CHAR)
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{
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/* We have two character strings to concatenate. */
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if (TYPE_CODE (VALUE_TYPE (inval2)) != TYPE_CODE_STRING
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&& TYPE_CODE (VALUE_TYPE (inval2)) != TYPE_CODE_CHAR)
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{
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error ("Strings can only be concatenated with other strings.");
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}
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inval1len = TYPE_LENGTH (VALUE_TYPE (inval1));
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inval2len = TYPE_LENGTH (VALUE_TYPE (inval2));
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ptr = (char *) alloca (inval1len + inval2len);
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if (TYPE_CODE (VALUE_TYPE (inval1)) == TYPE_CODE_CHAR)
|
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{
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*ptr = (char) unpack_long (VALUE_TYPE (inval1), VALUE_CONTENTS (inval1));
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}
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else
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{
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memcpy (ptr, VALUE_CONTENTS (inval1), inval1len);
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}
|
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if (TYPE_CODE (VALUE_TYPE (inval2)) == TYPE_CODE_CHAR)
|
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{
|
||
*(ptr + inval1len) =
|
||
(char) unpack_long (VALUE_TYPE (inval2), VALUE_CONTENTS (inval2));
|
||
}
|
||
else
|
||
{
|
||
memcpy (ptr + inval1len, VALUE_CONTENTS (inval2), inval2len);
|
||
}
|
||
outval = value_string (ptr, inval1len + inval2len);
|
||
}
|
||
else if (TYPE_CODE (VALUE_TYPE (inval1)) == TYPE_CODE_BITSTRING
|
||
|| TYPE_CODE (VALUE_TYPE (inval1)) == TYPE_CODE_BOOL)
|
||
{
|
||
/* We have two bitstrings to concatenate. */
|
||
if (TYPE_CODE (VALUE_TYPE (inval2)) != TYPE_CODE_BITSTRING
|
||
&& TYPE_CODE (VALUE_TYPE (inval2)) != 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);
|
||
}
|
||
|
||
|
||
/* 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_binop (arg1, arg2, op)
|
||
value arg1, arg2;
|
||
enum exp_opcode op;
|
||
{
|
||
register value 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 (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))
|
||
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)
|
||
{
|
||
double v1, v2, v;
|
||
v1 = value_as_double (arg1);
|
||
v2 = value_as_double (arg2);
|
||
switch (op)
|
||
{
|
||
case BINOP_ADD:
|
||
v = v1 + v2;
|
||
break;
|
||
|
||
case BINOP_SUB:
|
||
v = v1 - v2;
|
||
break;
|
||
|
||
case BINOP_MUL:
|
||
v = v1 * v2;
|
||
break;
|
||
|
||
case BINOP_DIV:
|
||
v = v1 / v2;
|
||
break;
|
||
|
||
default:
|
||
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;
|
||
}
|
||
else if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_BOOL
|
||
&&
|
||
TYPE_CODE (VALUE_TYPE (arg2)) == TYPE_CODE_BOOL)
|
||
{
|
||
LONGEST v1, v2, v;
|
||
v1 = value_as_long (arg1);
|
||
v2 = value_as_long (arg2);
|
||
|
||
switch (op)
|
||
{
|
||
case BINOP_BITWISE_AND:
|
||
v = v1 & v2;
|
||
break;
|
||
|
||
case BINOP_BITWISE_IOR:
|
||
v = v1 | v2;
|
||
break;
|
||
|
||
case BINOP_BITWISE_XOR:
|
||
v = v1 ^ v2;
|
||
break;
|
||
|
||
default:
|
||
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;
|
||
}
|
||
else
|
||
/* Integral operations here. */
|
||
/* FIXME: Also mixed integral/booleans, with result an integer. */
|
||
{
|
||
/* 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 LONGEST v1, v2, v;
|
||
v1 = (unsigned LONGEST) value_as_long (arg1);
|
||
v2 = (unsigned LONGEST) value_as_long (arg2);
|
||
|
||
switch (op)
|
||
{
|
||
case BINOP_ADD:
|
||
v = v1 + v2;
|
||
break;
|
||
|
||
case BINOP_SUB:
|
||
v = v1 - v2;
|
||
break;
|
||
|
||
case BINOP_MUL:
|
||
v = v1 * v2;
|
||
break;
|
||
|
||
case BINOP_DIV:
|
||
v = v1 / v2;
|
||
break;
|
||
|
||
case BINOP_REM:
|
||
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. */
|
||
/* 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;
|
||
}
|
||
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_RSH:
|
||
v = v1 >> v2;
|
||
break;
|
||
|
||
case BINOP_BITWISE_AND:
|
||
v = v1 & v2;
|
||
break;
|
||
|
||
case BINOP_BITWISE_IOR:
|
||
v = v1 | v2;
|
||
break;
|
||
|
||
case BINOP_BITWISE_XOR:
|
||
v = v1 ^ v2;
|
||
break;
|
||
|
||
case BINOP_LOGICAL_AND:
|
||
v = v1 && v2;
|
||
break;
|
||
|
||
case BINOP_LOGICAL_OR:
|
||
v = v1 || v2;
|
||
break;
|
||
|
||
case BINOP_MIN:
|
||
v = v1 < v2 ? v1 : v2;
|
||
break;
|
||
|
||
case BINOP_MAX:
|
||
v = v1 > v2 ? 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;
|
||
}
|
||
else
|
||
{
|
||
LONGEST v1, v2, v;
|
||
v1 = value_as_long (arg1);
|
||
v2 = value_as_long (arg2);
|
||
|
||
switch (op)
|
||
{
|
||
case BINOP_ADD:
|
||
v = v1 + v2;
|
||
break;
|
||
|
||
case BINOP_SUB:
|
||
v = v1 - v2;
|
||
break;
|
||
|
||
case BINOP_MUL:
|
||
v = v1 * v2;
|
||
break;
|
||
|
||
case BINOP_DIV:
|
||
v = v1 / v2;
|
||
break;
|
||
|
||
case BINOP_REM:
|
||
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. */
|
||
/* 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;
|
||
}
|
||
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_RSH:
|
||
v = v1 >> v2;
|
||
break;
|
||
|
||
case BINOP_BITWISE_AND:
|
||
v = v1 & v2;
|
||
break;
|
||
|
||
case BINOP_BITWISE_IOR:
|
||
v = v1 | v2;
|
||
break;
|
||
|
||
case BINOP_BITWISE_XOR:
|
||
v = v1 ^ v2;
|
||
break;
|
||
|
||
case BINOP_LOGICAL_AND:
|
||
v = v1 && v2;
|
||
break;
|
||
|
||
case BINOP_LOGICAL_OR:
|
||
v = v1 || v2;
|
||
break;
|
||
|
||
case BINOP_MIN:
|
||
v = v1 < v2 ? v1 : v2;
|
||
break;
|
||
|
||
case BINOP_MAX:
|
||
v = v1 > v2 ? 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;
|
||
}
|
||
}
|
||
|
||
return val;
|
||
}
|
||
|
||
/* Simulate the C operator ! -- return 1 if ARG1 contains zero. */
|
||
|
||
int
|
||
value_logical_not (arg1)
|
||
value arg1;
|
||
{
|
||
register int len;
|
||
register char *p;
|
||
|
||
COERCE_ARRAY (arg1);
|
||
|
||
if (TYPE_CODE (VALUE_TYPE (arg1)) == TYPE_CODE_FLT)
|
||
return 0 == value_as_double (arg1);
|
||
|
||
len = TYPE_LENGTH (VALUE_TYPE (arg1));
|
||
p = VALUE_CONTENTS (arg1);
|
||
|
||
while (--len >= 0)
|
||
{
|
||
if (*p++)
|
||
break;
|
||
}
|
||
|
||
return len < 0;
|
||
}
|
||
|
||
/* Simulate the C operator == by returning a 1
|
||
iff ARG1 and ARG2 have equal contents. */
|
||
|
||
int
|
||
value_equal (arg1, arg2)
|
||
register value arg1, arg2;
|
||
|
||
{
|
||
register int len;
|
||
register char *p1, *p2;
|
||
enum type_code code1;
|
||
enum type_code code2;
|
||
|
||
COERCE_ARRAY (arg1);
|
||
COERCE_ARRAY (arg2);
|
||
|
||
code1 = TYPE_CODE (VALUE_TYPE (arg1));
|
||
code2 = TYPE_CODE (VALUE_TYPE (arg2));
|
||
|
||
if (code1 == TYPE_CODE_INT && code2 == TYPE_CODE_INT)
|
||
return value_as_long (arg1) == value_as_long (arg2);
|
||
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);
|
||
|
||
/* FIXME: Need to promote to either CORE_ADDR or LONGEST, whichever
|
||
is bigger. */
|
||
else if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_INT)
|
||
return value_as_pointer (arg1) == (CORE_ADDR) value_as_long (arg2);
|
||
else if (code2 == TYPE_CODE_PTR && code1 == TYPE_CODE_INT)
|
||
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))))
|
||
{
|
||
p1 = VALUE_CONTENTS (arg1);
|
||
p2 = VALUE_CONTENTS (arg2);
|
||
while (--len >= 0)
|
||
{
|
||
if (*p1++ != *p2++)
|
||
break;
|
||
}
|
||
return len < 0;
|
||
}
|
||
else
|
||
{
|
||
error ("Invalid type combination in equality test.");
|
||
return 0; /* For lint -- never reached */
|
||
}
|
||
}
|
||
|
||
/* Simulate the C operator < by returning 1
|
||
iff ARG1's contents are less than ARG2's. */
|
||
|
||
int
|
||
value_less (arg1, arg2)
|
||
register value arg1, arg2;
|
||
{
|
||
register enum type_code code1;
|
||
register enum type_code code2;
|
||
|
||
COERCE_ARRAY (arg1);
|
||
COERCE_ARRAY (arg2);
|
||
|
||
code1 = TYPE_CODE (VALUE_TYPE (arg1));
|
||
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);
|
||
}
|
||
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);
|
||
else if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_PTR)
|
||
return value_as_pointer (arg1) < value_as_pointer (arg2);
|
||
|
||
/* FIXME: Need to promote to either CORE_ADDR or LONGEST, whichever
|
||
is bigger. */
|
||
else if (code1 == TYPE_CODE_PTR && code2 == TYPE_CODE_INT)
|
||
return value_as_pointer (arg1) < (CORE_ADDR) value_as_long (arg2);
|
||
else if (code2 == TYPE_CODE_PTR && code1 == TYPE_CODE_INT)
|
||
return (CORE_ADDR) value_as_long (arg1) < value_as_pointer (arg2);
|
||
|
||
else
|
||
{
|
||
error ("Invalid type combination in ordering comparison.");
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
/* The unary operators - and ~. Both free the argument ARG1. */
|
||
|
||
value
|
||
value_neg (arg1)
|
||
register value arg1;
|
||
{
|
||
register struct type *type;
|
||
|
||
COERCE_ENUM (arg1);
|
||
|
||
type = VALUE_TYPE (arg1);
|
||
|
||
if (TYPE_CODE (type) == TYPE_CODE_FLT)
|
||
return value_from_double (type, - value_as_double (arg1));
|
||
else if (TYPE_CODE (type) == TYPE_CODE_INT)
|
||
return value_from_longest (type, - value_as_long (arg1));
|
||
else {
|
||
error ("Argument to negate operation not a number.");
|
||
return 0; /* For lint -- never reached */
|
||
}
|
||
}
|
||
|
||
value
|
||
value_complement (arg1)
|
||
register value arg1;
|
||
{
|
||
COERCE_ENUM (arg1);
|
||
|
||
if (TYPE_CODE (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));
|
||
}
|
||
|