/* Perform arithmetic and other operations on values, for GDB.
Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
- 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
+ 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
Free Software Foundation, Inc.
This file is part of GDB.
#define TRUNCATION_TOWARDS_ZERO ((-5 / 2) == -2)
#endif
-static struct type *unop_result_type (enum exp_opcode op, struct type *type1);
-static struct type *binop_result_type (enum exp_opcode op, struct type *type1,
- struct type *type2);
-
void _initialize_valarith (void);
\f
memcpy (value_contents_writeable (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);
+ set_value_component_location (v, array);
VALUE_REGNUM (v) = VALUE_REGNUM (array);
VALUE_FRAME_ID (v) = VALUE_FRAME_ID (array);
set_value_offset (v, value_offset (array) + elt_offs);
set_value_bitpos (v, bit_index);
set_value_bitsize (v, 1);
-
- VALUE_LVAL (v) = VALUE_LVAL (bitstring);
- if (VALUE_LVAL (bitstring) == lval_internalvar)
- VALUE_LVAL (v) = lval_internalvar_component;
- VALUE_ADDRESS (v) = VALUE_ADDRESS (bitstring);
+ set_value_component_location (v, bitstring);
VALUE_FRAME_ID (v) = VALUE_FRAME_ID (bitstring);
set_value_offset (v, offset + value_offset (bitstring));
arg1 = coerce_ref (arg1);
arg2 = coerce_ref (arg2);
- arg1 = coerce_enum (arg1);
- arg2 = 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. */
int static_memfuncp, nargs;
arg1 = coerce_ref (arg1);
- 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. */
break;
case UNOP_POSTINCREMENT:
strcpy (ptr, "++");
- argvec[2] = value_from_longest (builtin_type_int, 0);
+ argvec[2] = value_from_longest (builtin_type_int8, 0);
argvec[3] = 0;
nargs ++;
break;
case UNOP_POSTDECREMENT:
strcpy (ptr, "--");
- argvec[2] = value_from_longest (builtin_type_int, 0);
+ argvec[2] = value_from_longest (builtin_type_int8, 0);
argvec[3] = 0;
nargs ++;
break;
return (outval);
}
\f
-/* Return result type of OP performed on TYPE1.
- The result type follows ANSI C rules.
- If the result is not appropropriate for any particular language then it
- needs to patch this function to return the correct type. */
-
-static struct type *
-unop_result_type (enum exp_opcode op, struct type *type1)
-{
- struct type *result_type;
-
- type1 = check_typedef (type1);
- result_type = type1;
-
- switch (op)
- {
- case UNOP_PLUS:
- case UNOP_NEG:
- break;
- case UNOP_COMPLEMENT:
- /* Reject floats and decimal floats. */
- if (!is_integral_type (type1))
- error (_("Argument to complement operation not an integer or boolean."));
- break;
- default:
- error (_("Invalid unary operation on numbers."));
- }
-
- if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT
- || TYPE_CODE (type1) == TYPE_CODE_FLT)
- {
- return result_type;
- }
- else if (is_integral_type (type1))
- {
- /* Perform integral promotion for ANSI C/C++.
- If not appropropriate for any particular language it needs to
- modify this function to return the correct result for it. */
- if (TYPE_LENGTH (type1) < TYPE_LENGTH (builtin_type_int))
- result_type = builtin_type_int;
-
- return result_type;
- }
- else
- {
- error (_("Argument to unary operation not a number."));
- return 0; /* For lint -- never reached */
- }
-}
-
-/* Return result type of OP performed on TYPE1, TYPE2.
- If the result is not appropropriate for any particular language then it
- needs to patch this function to return the correct type. */
-
-static struct type *
-binop_result_type (enum exp_opcode op, struct type *type1, struct type *type2)
-{
- type1 = check_typedef (type1);
- type2 = check_typedef (type2);
-
- if ((TYPE_CODE (type1) != TYPE_CODE_FLT
- && TYPE_CODE (type1) != TYPE_CODE_DECFLOAT
- && !is_integral_type (type1))
- ||
- (TYPE_CODE (type2) != TYPE_CODE_FLT
- && TYPE_CODE (type2) != TYPE_CODE_DECFLOAT
- && !is_integral_type (type2)))
- error (_("Argument to arithmetic operation not a number or boolean."));
-
- if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT
- || TYPE_CODE (type2) == TYPE_CODE_DECFLOAT)
- {
- switch (op)
- {
- case BINOP_ADD:
- case BINOP_SUB:
- case BINOP_MUL:
- case BINOP_DIV:
- case BINOP_EXP:
- break;
- default:
- error (_("Operation not valid for decimal floating point number."));
- }
-
- if (TYPE_CODE (type1) != TYPE_CODE_DECFLOAT)
- /* If type1 is not a decimal float, the type of the result is the type
- of the decimal float argument, type2. */
- return type2;
- else if (TYPE_CODE (type2) != TYPE_CODE_DECFLOAT)
- /* Same logic, for the case where type2 is not a decimal float. */
- return type1;
- else
- /* Both are decimal floats, the type of the result is the bigger
- of the two. */
- return (TYPE_LENGTH (type1) > TYPE_LENGTH (type2)) ? type1 : type2;
- }
- else if (TYPE_CODE (type1) == TYPE_CODE_FLT
- || TYPE_CODE (type2) == TYPE_CODE_FLT)
- {
- switch (op)
- {
- case BINOP_ADD:
- case BINOP_SUB:
- case BINOP_MUL:
- case BINOP_DIV:
- case BINOP_EXP:
- case BINOP_MIN:
- case BINOP_MAX:
- break;
- default:
- error (_("Integer-only operation on floating point number."));
- }
-
- switch (current_language->la_language)
- {
- case language_c:
- case language_cplus:
- case language_asm:
- case language_objc:
- /* Perform ANSI/ISO-C promotions.
- If only one type is float, use its type.
- Otherwise use the bigger type. */
- if (TYPE_CODE (type1) != TYPE_CODE_FLT)
- return type2;
- else if (TYPE_CODE (type2) != TYPE_CODE_FLT)
- return type1;
- else
- return (TYPE_LENGTH (type1) > TYPE_LENGTH (type2)) ? type1 : type2;
-
- default:
- /* For other languages the result type is unchanged from gdb
- version 6.7 for backward compatibility.
- If either arg was long double, make sure that value is also long
- double. Otherwise use double. */
- if (TYPE_LENGTH (type1) * 8 > gdbarch_double_bit (current_gdbarch)
- || TYPE_LENGTH (type2) * 8 > gdbarch_double_bit (current_gdbarch))
- return builtin_type_long_double;
- else
- return builtin_type_double;
- }
- }
- else if (TYPE_CODE (type1) == TYPE_CODE_BOOL
- && TYPE_CODE (type2) == TYPE_CODE_BOOL)
- {
- switch (op)
- {
- case BINOP_BITWISE_AND:
- case BINOP_BITWISE_IOR:
- case BINOP_BITWISE_XOR:
- case BINOP_EQUAL:
- case BINOP_NOTEQUAL:
- break;
- default:
- error (_("Invalid operation on booleans."));
- }
-
- return type1;
- }
- else
- /* Integral operations here. */
- /* FIXME: Also mixed integral/booleans, with result an integer. */
- {
- 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. For exponentiation and shift operators,
- use the length and type of the left operand. Otherwise,
- 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 (op == BINOP_RSH || op == BINOP_LSH || op == BINOP_EXP)
- {
- /* In case of the shift operators and exponentiation the type of
- the result only depends on the type of the left operand. */
- unsigned_operation = is_unsigned1;
- result_len = promoted_len1;
- }
- else 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;
- }
-
- switch (op)
- {
- case BINOP_ADD:
- case BINOP_SUB:
- case BINOP_MUL:
- case BINOP_DIV:
- case BINOP_INTDIV:
- case BINOP_EXP:
- case BINOP_REM:
- case BINOP_MOD:
- case BINOP_LSH:
- case BINOP_RSH:
- case BINOP_BITWISE_AND:
- case BINOP_BITWISE_IOR:
- case BINOP_BITWISE_XOR:
- case BINOP_LOGICAL_AND:
- case BINOP_LOGICAL_OR:
- case BINOP_MIN:
- case BINOP_MAX:
- case BINOP_EQUAL:
- case BINOP_NOTEQUAL:
- case BINOP_LESS:
- break;
-
- default:
- error (_("Invalid binary operation on numbers."));
- }
-
- switch (current_language->la_language)
- {
- case language_c:
- case language_cplus:
- case language_asm:
- case language_objc:
- if (result_len <= TYPE_LENGTH (builtin_type_int))
- {
- return (unsigned_operation
- ? builtin_type_unsigned_int
- : builtin_type_int);
- }
- else if (result_len <= TYPE_LENGTH (builtin_type_long))
- {
- return (unsigned_operation
- ? builtin_type_unsigned_long
- : builtin_type_long);
- }
- else
- {
- return (unsigned_operation
- ? builtin_type_unsigned_long_long
- : builtin_type_long_long);
- }
-
- default:
- /* For other languages the result type is unchanged from gdb
- version 6.7 for backward compatibility.
- If either arg was long long, make sure that value is also long
- long. Otherwise use long. */
- if (unsigned_operation)
- {
- if (result_len > gdbarch_long_bit (current_gdbarch) / HOST_CHAR_BIT)
- return builtin_type_unsigned_long_long;
- else
- return builtin_type_unsigned_long;
- }
- else
- {
- if (result_len > gdbarch_long_bit (current_gdbarch) / HOST_CHAR_BIT)
- return builtin_type_long_long;
- else
- return builtin_type_long;
- }
- }
- }
-
- return NULL; /* avoid -Wall warning */
-}
-
/* Integer exponentiation: V1**V2, where both arguments are
integers. Requires V1 != 0 if V2 < 0. Returns 1 for 0 ** 0. */
static LONGEST
value_binop (struct value *arg1, struct value *arg2, enum exp_opcode op)
{
struct value *val;
- struct type *result_type;
+ struct type *type1, *type2, *result_type;
arg1 = coerce_ref (arg1);
arg2 = coerce_ref (arg2);
- result_type = binop_result_type (op, value_type (arg1), value_type (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_DECFLOAT
+ && !is_integral_type (type1))
+ || (TYPE_CODE (type2) != TYPE_CODE_FLT
+ && TYPE_CODE (type2) != TYPE_CODE_DECFLOAT
+ && !is_integral_type (type2)))
+ error (_("Argument to arithmetic operation not a number or boolean."));
- if (TYPE_CODE (result_type) == TYPE_CODE_DECFLOAT)
+ if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT
+ || TYPE_CODE (type2) == TYPE_CODE_DECFLOAT)
{
struct type *v_type;
int len_v1, len_v2, len_v;
error (_("Operation not valid for decimal floating point number."));
}
+ /* If only one type is decimal float, use its type.
+ Otherwise use the bigger type. */
+ if (TYPE_CODE (type1) != TYPE_CODE_DECFLOAT)
+ result_type = type2;
+ else if (TYPE_CODE (type2) != TYPE_CODE_DECFLOAT)
+ result_type = type1;
+ else if (TYPE_LENGTH (type2) > TYPE_LENGTH (type1))
+ result_type = type2;
+ else
+ result_type = type1;
+
val = value_from_decfloat (result_type, v);
}
- else if (TYPE_CODE (result_type) == TYPE_CODE_FLT)
+ else 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
error (_("Integer-only operation on floating point number."));
}
+ /* If only one type is float, use its type.
+ Otherwise use the bigger type. */
+ if (TYPE_CODE (type1) != TYPE_CODE_FLT)
+ result_type = type2;
+ else if (TYPE_CODE (type2) != TYPE_CODE_FLT)
+ result_type = type1;
+ else if (TYPE_LENGTH (type2) > TYPE_LENGTH (type1))
+ result_type = type2;
+ else
+ result_type = type1;
+
val = allocate_value (result_type);
store_typed_floating (value_contents_raw (val), value_type (val), v);
}
- else if (TYPE_CODE (result_type) == TYPE_CODE_BOOL)
+ else if (TYPE_CODE (type1) == TYPE_CODE_BOOL
+ || TYPE_CODE (type2) == TYPE_CODE_BOOL)
{
LONGEST v1, v2, v = 0;
v1 = value_as_long (arg1);
error (_("Invalid operation on booleans."));
}
+ result_type = type1;
+
val = allocate_value (result_type);
store_signed_integer (value_contents_raw (val),
TYPE_LENGTH (result_type),
else
/* Integral operations here. */
{
- int unsigned_operation = TYPE_UNSIGNED (result_type);
+ /* Determine type length of the result, and if the operation should
+ be done unsigned. For exponentiation and shift operators,
+ use the length and type of the left operand. Otherwise,
+ 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 (op == BINOP_RSH || op == BINOP_LSH || op == BINOP_EXP)
+ result_type = type1;
+ else if (TYPE_LENGTH (type1) > TYPE_LENGTH (type2))
+ result_type = type1;
+ else if (TYPE_LENGTH (type2) > TYPE_LENGTH (type1))
+ result_type = type2;
+ else if (TYPE_UNSIGNED (type1))
+ result_type = type1;
+ else if (TYPE_UNSIGNED (type2))
+ result_type = type2;
+ else
+ result_type = type1;
- if (unsigned_operation)
+ if (TYPE_UNSIGNED (result_type))
{
- unsigned int len1, len2, result_len;
LONGEST v2_signed = value_as_long (arg2);
ULONGEST v1, v2, v = 0;
v1 = (ULONGEST) value_as_long (arg1);
v2 = (ULONGEST) v2_signed;
- /* Truncate values to the type length of the result.
- Things are mildly tricky because binop_result_type may
- return a long which on amd64 is 8 bytes, and that's a problem if
- ARG1, ARG2 are both <= 4 bytes: we need to truncate the values
- at 4 bytes not 8. So fetch the lengths of the original types
- and truncate at the larger of the two. */
- len1 = TYPE_LENGTH (value_type (arg1));
- len2 = TYPE_LENGTH (value_type (arg1));
- result_len = len1 > len2 ? len1 : len2;
- if (result_len < sizeof (ULONGEST))
- {
- v1 &= ((LONGEST) 1 << HOST_CHAR_BIT * result_len) - 1;
- v2 &= ((LONGEST) 1 << HOST_CHAR_BIT * result_len) - 1;
- }
-
switch (op)
{
case BINOP_ADD:
const gdb_byte *p;
struct type *type1;
- arg1 = coerce_number (arg1);
+ arg1 = coerce_array (arg1);
type1 = check_typedef (value_type (arg1));
if (TYPE_CODE (type1) == TYPE_CODE_FLT)
value_pos (struct value *arg1)
{
struct type *type;
- struct type *result_type;
arg1 = coerce_ref (arg1);
type = check_typedef (value_type (arg1));
- result_type = unop_result_type (UNOP_PLUS, value_type (arg1));
if (TYPE_CODE (type) == TYPE_CODE_FLT)
- return value_from_double (result_type, value_as_double (arg1));
+ return value_from_double (type, value_as_double (arg1));
else if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT)
- return value_from_decfloat (result_type, value_contents (arg1));
+ return value_from_decfloat (type, value_contents (arg1));
else if (is_integral_type (type))
{
- return value_from_longest (result_type, value_as_long (arg1));
+ return value_from_longest (type, value_as_long (arg1));
}
else
{
value_neg (struct value *arg1)
{
struct type *type;
- struct type *result_type;
arg1 = coerce_ref (arg1);
type = check_typedef (value_type (arg1));
- result_type = unop_result_type (UNOP_NEG, value_type (arg1));
if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT)
{
- struct value *val = allocate_value (result_type);
+ struct value *val = allocate_value (type);
int len = TYPE_LENGTH (type);
gdb_byte decbytes[16]; /* a decfloat is at most 128 bits long */
return val;
}
else if (TYPE_CODE (type) == TYPE_CODE_FLT)
- return value_from_double (result_type, -value_as_double (arg1));
+ return value_from_double (type, -value_as_double (arg1));
else if (is_integral_type (type))
{
- return value_from_longest (result_type, -value_as_long (arg1));
+ return value_from_longest (type, -value_as_long (arg1));
}
else
{
value_complement (struct value *arg1)
{
struct type *type;
- struct type *result_type;
arg1 = coerce_ref (arg1);
type = check_typedef (value_type (arg1));
- result_type = unop_result_type (UNOP_COMPLEMENT, value_type (arg1));
if (!is_integral_type (type))
error (_("Argument to complement operation not an integer or boolean."));
- return value_from_longest (result_type, ~value_as_long (arg1));
+ return value_from_longest (type, ~value_as_long (arg1));
}
\f
/* The INDEX'th bit of SET value whose value_type is TYPE,
LONGEST low_bound, high_bound;
LONGEST word;
unsigned rel_index;
- struct type *range = TYPE_FIELD_TYPE (type, 0);
+ struct type *range = TYPE_INDEX_TYPE (type);
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));
+ word = extract_unsigned_integer (valaddr + (rel_index / TARGET_CHAR_BIT), 1);
rel_index %= TARGET_CHAR_BIT;
if (gdbarch_bits_big_endian (current_gdbarch))
rel_index = TARGET_CHAR_BIT - 1 - rel_index;
projects / deliverable / binutils-gdb.git / blobdiff