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Diffstat (limited to 'gdb/valarith.c')
| -rw-r--r-- | gdb/valarith.c | 1213 |
1 files changed, 0 insertions, 1213 deletions
diff --git a/gdb/valarith.c b/gdb/valarith.c deleted file mode 100644 index c03d0a4..0000000 --- a/gdb/valarith.c +++ /dev/null @@ -1,1213 +0,0 @@ -/* Perform arithmetic and other operations on values, for GDB. - Copyright 1986, 1989, 1991, 1992, 1993, 1994 - Free Software Foundation, Inc. - -This file is part of GDB. - -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#include "defs.h" -#include "value.h" -#include "symtab.h" -#include "gdbtypes.h" -#include "expression.h" -#include "target.h" -#include "language.h" -#include "demangle.h" -#include "gdb_string.h" - -/* 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)); - - -value_ptr -value_add (arg1, arg2) - value_ptr arg1, arg2; -{ - register value_ptr valint, valptr; - register int len; - struct type *type1, *type2, *valptrtype; - - COERCE_NUMBER (arg1); - COERCE_NUMBER (arg2); - type1 = check_typedef (VALUE_TYPE (arg1)); - type2 = check_typedef (VALUE_TYPE (arg2)); - - if ((TYPE_CODE (type1) == TYPE_CODE_PTR - || TYPE_CODE (type2) == TYPE_CODE_PTR) - && - (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 (type1) == TYPE_CODE_PTR) - { - valptr = arg1; - valint = arg2; - valptrtype = type1; - } - else - { - valptr = arg2; - valint = arg1; - valptrtype = type2; - } - len = TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (valptrtype))); - if (len == 0) len = 1; /* For (void *) */ - return value_from_longest (valptrtype, - value_as_long (valptr) - + (len * value_as_long (valint))); - } - - return value_binop (arg1, arg2, BINOP_ADD); -} - -value_ptr -value_sub (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)); - - if (TYPE_CODE (type1) == TYPE_CODE_PTR) - { - 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) - (sz * value_as_long (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)) / sz); - } - else - { - error ("\ -First argument of `-' is a pointer and second argument is neither\n\ -an integer nor a pointer of the same type."); - } - } - - return value_binop (arg1, arg2, BINOP_SUB); -} - -/* 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_ptr -value_subscript (array, idx) - value_ptr array, idx; -{ - 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_ptr -value_subscripted_rvalue (array, idx, lowerbound) - value_ptr array, idx; - int lowerbound; -{ - 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); - 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) = VALUE_LVAL (array); - VALUE_ADDRESS (v) = VALUE_ADDRESS (array); - VALUE_OFFSET (v) = VALUE_OFFSET (array) + elt_offs; - return v; -} - -/* Check to see if either argument is a structure. This is called so - we know whether to go ahead with the normal binop or look for a - user defined function instead. - - For now, we do not overload the `=' operator. */ - -int -binop_user_defined_p (op, arg1, arg2) - enum exp_opcode op; - value_ptr arg1, arg2; -{ - struct type *type1, *type2; - if (op == BINOP_ASSIGN || op == BINOP_CONCAT) - return 0; - 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 - we know whether to go ahead with the normal unop or look for a - user defined function instead. - - For now, we do not overload the `&' operator. */ - -int unop_user_defined_p (op, arg1) - enum exp_opcode op; - value_ptr arg1; -{ - struct type *type1; - if (op == UNOP_ADDR) - return 0; - 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 - user defined function. Create an argument vector that calls - arg1.operator @ (arg1,arg2) and return that value (where '@' is any - binary operator which is legal for GNU C++). - - OP is the operatore, and if it is BINOP_ASSIGN_MODIFY, then OTHEROP - is the opcode saying how to modify it. Otherwise, OTHEROP is - unused. */ - -value_ptr -value_x_binop (arg1, arg2, op, otherop) - value_ptr arg1, arg2; - enum exp_opcode op, otherop; -{ - value_ptr * argvec; - char *ptr; - char tstr[13]; - int static_memfuncp; - - COERCE_REF (arg1); - COERCE_REF (arg2); - COERCE_ENUM (arg1); - COERCE_ENUM (arg2); - - /* 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 (check_typedef (VALUE_TYPE (arg1))) != TYPE_CODE_STRUCT) - error ("Can't do that binary op on that type"); /* FIXME be explicit */ - - argvec = (value_ptr *) alloca (sizeof (value_ptr) * 4); - argvec[1] = value_addr (arg1); - argvec[2] = arg2; - argvec[3] = 0; - - /* make the right function name up */ - strcpy(tstr, "operator__"); - ptr = tstr+8; - switch (op) - { - case BINOP_ADD: strcpy(ptr,"+"); break; - case BINOP_SUB: strcpy(ptr,"-"); break; - case BINOP_MUL: strcpy(ptr,"*"); break; - case BINOP_DIV: strcpy(ptr,"/"); break; - case BINOP_REM: strcpy(ptr,"%"); break; - case BINOP_LSH: strcpy(ptr,"<<"); break; - case BINOP_RSH: strcpy(ptr,">>"); break; - case BINOP_BITWISE_AND: strcpy(ptr,"&"); break; - case BINOP_BITWISE_IOR: strcpy(ptr,"|"); break; - case BINOP_BITWISE_XOR: strcpy(ptr,"^"); break; - case BINOP_LOGICAL_AND: strcpy(ptr,"&&"); break; - case BINOP_LOGICAL_OR: strcpy(ptr,"||"); break; - case BINOP_MIN: strcpy(ptr,"<?"); break; - case BINOP_MAX: strcpy(ptr,">?"); break; - case BINOP_ASSIGN: strcpy(ptr,"="); break; - case BINOP_ASSIGN_MODIFY: - switch (otherop) - { - case BINOP_ADD: strcpy(ptr,"+="); break; - case BINOP_SUB: strcpy(ptr,"-="); break; - case BINOP_MUL: strcpy(ptr,"*="); break; - case BINOP_DIV: strcpy(ptr,"/="); break; - case BINOP_REM: strcpy(ptr,"%="); break; - 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."); - } - break; - case BINOP_SUBSCRIPT: strcpy(ptr,"[]"); break; - case BINOP_EQUAL: strcpy(ptr,"=="); break; - case BINOP_NOTEQUAL: strcpy(ptr,"!="); break; - case BINOP_LESS: strcpy(ptr,"<"); break; - 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) - { - argvec[1] = argvec[0]; - argvec++; - } - return call_function_by_hand (argvec[0], 2 - static_memfuncp, argvec + 1); - } - error ("member function %s not found", tstr); -#ifdef lint - return call_function_by_hand (argvec[0], 2 - static_memfuncp, argvec + 1); -#endif -} - -/* We know that arg1 is a structure, so try to find a unary user - defined operator that matches the operator in question. - Create an argument vector that calls arg1.operator @ (arg1) - and return that value (where '@' is (almost) any unary operator which - is legal for GNU C++). */ - -value_ptr -value_x_unop (arg1, op) - value_ptr arg1; - enum exp_opcode op; -{ - 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 (check_typedef (VALUE_TYPE (arg1))) != TYPE_CODE_STRUCT) - error ("Can't do that unary op on that type"); /* FIXME be explicit */ - - 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; - case UNOP_PREDECREMENT: strcpy(ptr,"++"); break; - case UNOP_POSTINCREMENT: strcpy(ptr,"++"); break; - case UNOP_POSTDECREMENT: strcpy(ptr,"++"); break; - case UNOP_LOGICAL_NOT: strcpy(ptr,"!"); break; - case UNOP_COMPLEMENT: strcpy(ptr,"~"); break; - case UNOP_NEG: 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) - { - argvec[1] = argvec[0]; - argvec++; - } - return call_function_by_hand (argvec[0], 1 - static_memfuncp, argvec + 1); - } - error ("member function %s not found", tstr); - return 0; /* For lint -- never reached */ -} - - -/* 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); -} - - - -/* 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_ptr -value_binop (arg1, arg2, op) - value_ptr arg1, arg2; - enum exp_opcode op; -{ - register value_ptr val; - struct type *type1, *type2; - - COERCE_REF (arg1); - COERCE_REF (arg2); - COERCE_ENUM (arg1); - COERCE_ENUM (arg2); - 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 (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 (type1) == TYPE_CODE_FLT - || - TYPE_CODE (type2) == 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. */ - DOUBLEST 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."); - } - - /* 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 (type1) == TYPE_CODE_BOOL - && - TYPE_CODE (type2) == 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."); - } - - 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? */ - { - 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) - { - 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. */ - /* 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_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; - - case BINOP_EQUAL: - v = v1 == v2; - break; - - case BINOP_LESS: - v = v1 < v2; - break; - - default: - error ("Invalid binary operation on numbers."); - } - - /* 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 - { - 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. */ - /* 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_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; - - case BINOP_EQUAL: - v = v1 == v2; - break; - - case BINOP_LESS: - v = v1 < v2; - break; - - default: - error ("Invalid binary operation on numbers."); - } - - /* 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); - } - } - - return val; -} - -/* Simulate the C operator ! -- return 1 if ARG1 contains zero. */ - -int -value_logical_not (arg1) - value_ptr arg1; -{ - register int len; - register char *p; - struct type *type1; - - COERCE_NUMBER (arg1); - type1 = check_typedef (VALUE_TYPE (arg1)); - - if (TYPE_CODE (type1) == TYPE_CODE_FLT) - return 0 == value_as_double (arg1); - - len = TYPE_LENGTH (type1); - 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_ptr arg1, arg2; - -{ - register int len; - register char *p1, *p2; - struct type *type1, *type2; - enum type_code code1; - enum type_code code2; - - COERCE_NUMBER (arg1); - COERCE_NUMBER (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 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); - - /* 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 = (int) TYPE_LENGTH (type1)) - == (int) TYPE_LENGTH (type2))) - { - 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_ptr arg1, arg2; -{ - register enum type_code code1; - register enum type_code code2; - struct type *type1, *type2; - - COERCE_NUMBER (arg1); - COERCE_NUMBER (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 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); - 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_ptr -value_neg (arg1) - register value_ptr arg1; -{ - register struct type *type; - - COERCE_REF (arg1); - COERCE_ENUM (arg1); - - type = check_typedef (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_ptr -value_complement (arg1) - register value_ptr arg1; -{ - COERCE_REF (arg1); - COERCE_ENUM (arg1); - - 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)); -} - -/* 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 () -{ -} |