return value_slice (array, low_bound, high_bound - low_bound + 1);
}
+
+/* Promote value ARG1 as appropriate before performing a unary operation
+ on this argument.
+ If the result is not appropriate for any particular language then it
+ needs to patch this function. */
+
+void
+unop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
+ struct value **arg1)
+{
+ struct type *type1;
+
+ *arg1 = coerce_ref (*arg1);
+ type1 = check_typedef (value_type (*arg1));
+
+ if (is_integral_type (type1))
+ {
+ switch (language->la_language)
+ {
+ default:
+ /* Perform integral promotion for ANSI C/C++.
+ If not appropropriate for any particular language
+ it needs to modify this function. */
+ {
+ struct type *builtin_int = builtin_type (gdbarch)->builtin_int;
+ if (TYPE_LENGTH (type1) < TYPE_LENGTH (builtin_int))
+ *arg1 = value_cast (builtin_int, *arg1);
+ }
+ break;
+ }
+ }
+}
+
+/* Promote values ARG1 and ARG2 as appropriate before performing a binary
+ operation on those two operands.
+ If the result is not appropriate for any particular language then it
+ needs to patch this function. */
+
+void
+binop_promote (const struct language_defn *language, struct gdbarch *gdbarch,
+ struct value **arg1, struct value **arg2)
+{
+ struct type *promoted_type = NULL;
+ struct type *type1;
+ struct type *type2;
+
+ *arg1 = coerce_ref (*arg1);
+ *arg2 = coerce_ref (*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)))
+ return;
+
+ if (TYPE_CODE (type1) == TYPE_CODE_DECFLOAT
+ || TYPE_CODE (type2) == TYPE_CODE_DECFLOAT)
+ {
+ /* No promotion required. */
+ }
+ else if (TYPE_CODE (type1) == TYPE_CODE_FLT
+ || TYPE_CODE (type2) == TYPE_CODE_FLT)
+ {
+ switch (language->la_language)
+ {
+ case language_c:
+ case language_cplus:
+ case language_asm:
+ case language_objc:
+ /* No promotion required. */
+ break;
+
+ 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 (gdbarch)
+ || TYPE_LENGTH (type2) * 8 > gdbarch_double_bit (gdbarch))
+ promoted_type = builtin_type (gdbarch)->builtin_long_double;
+ else
+ promoted_type = builtin_type (gdbarch)->builtin_double;
+ break;
+ }
+ }
+ else if (TYPE_CODE (type1) == TYPE_CODE_BOOL
+ && TYPE_CODE (type2) == TYPE_CODE_BOOL)
+ {
+ /* No promotion required. */
+ }
+ else
+ /* Integral operations here. */
+ /* FIXME: Also mixed integral/booleans, with result an integer. */
+ {
+ const struct builtin_type *builtin = builtin_type (gdbarch);
+ 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->builtin_int))
+ {
+ is_unsigned1 = 0;
+ promoted_len1 = TYPE_LENGTH (builtin->builtin_int);
+ }
+ if (promoted_len2 < TYPE_LENGTH (builtin->builtin_int))
+ {
+ is_unsigned2 = 0;
+ promoted_len2 = TYPE_LENGTH (builtin->builtin_int);
+ }
+
+ 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 (language->la_language)
+ {
+ case language_c:
+ case language_cplus:
+ case language_asm:
+ case language_objc:
+ if (result_len <= TYPE_LENGTH (builtin->builtin_int))
+ {
+ promoted_type = (unsigned_operation
+ ? builtin->builtin_unsigned_int
+ : builtin->builtin_int);
+ }
+ else if (result_len <= TYPE_LENGTH (builtin->builtin_long))
+ {
+ promoted_type = (unsigned_operation
+ ? builtin->builtin_unsigned_long
+ : builtin->builtin_long);
+ }
+ else
+ {
+ promoted_type = (unsigned_operation
+ ? builtin->builtin_unsigned_long_long
+ : builtin->builtin_long_long);
+ }
+ break;
+
+ 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 (gdbarch) / HOST_CHAR_BIT)
+ promoted_type = builtin->builtin_unsigned_long_long;
+ else
+ promoted_type = builtin->builtin_unsigned_long;
+ }
+ else
+ {
+ if (result_len > gdbarch_long_bit (gdbarch) / HOST_CHAR_BIT)
+ promoted_type = builtin->builtin_long_long;
+ else
+ promoted_type = builtin->builtin_long;
+ }
+ break;
+ }
+ }
+
+ if (promoted_type)
+ {
+ /* Promote both operands to common type. */
+ *arg1 = value_cast (promoted_type, *arg1);
+ *arg2 = value_cast (promoted_type, *arg2);
+ }
+}
+
static int
ptrmath_type_p (struct type *type)
{
#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
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;
+
+ /* For shift and integer exponentiation operations,
+ only promote the first argument. */
+ if ((op == BINOP_LSH || op == BINOP_RSH || op == BINOP_EXP)
+ && is_integral_type (value_type (arg2)))
+ unop_promote (current_language, current_gdbarch, &arg1);
+ else
+ binop_promote (current_language, current_gdbarch, &arg1, &arg2);
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:
value_pos (struct value *arg1)
{
struct type *type;
- struct type *result_type;
+
+ unop_promote (current_language, current_gdbarch, &arg1);
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;
+
+ unop_promote (current_language, current_gdbarch, &arg1);
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;
+
+ unop_promote (current_language, current_gdbarch, &arg1);
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,
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