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/* Floating point definitions for GDB.
Copyright (C) 1986-2017 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 3 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, see <http://www.gnu.org/licenses/>. */
#ifndef DOUBLEST_H
#define DOUBLEST_H
struct type;
struct floatformat;
/* Use `long double' if the host compiler supports it. (Note that this is not
necessarily any longer than `double'. On SunOS/gcc, it's the same as
double.) This is necessary because GDB internally converts all floating
point values to the widest type supported by the host.
There are problems however, when the target `long double' is longer than the
host's `long double'. In general, we'll probably reduce the precision of
any such values and print a warning. */
#if (defined HAVE_LONG_DOUBLE && defined PRINTF_HAS_LONG_DOUBLE \
&& defined SCANF_HAS_LONG_DOUBLE)
typedef long double DOUBLEST;
# define DOUBLEST_PRINT_FORMAT "Lg"
# define DOUBLEST_SCAN_FORMAT "Lg"
#else
typedef double DOUBLEST;
# define DOUBLEST_PRINT_FORMAT "g"
# define DOUBLEST_SCAN_FORMAT "lg"
/* If we can't scan or print long double, we don't want to use it
anywhere. */
# undef HAVE_LONG_DOUBLE
# undef PRINTF_HAS_LONG_DOUBLE
# undef SCANF_HAS_LONG_DOUBLE
#endif
/* Different kinds of floatformat numbers recognized by
floatformat_classify. To avoid portability issues, we use local
values instead of the C99 macros (FP_NAN et cetera). */
enum float_kind {
float_nan,
float_infinite,
float_zero,
float_normal,
float_subnormal
};
extern void floatformat_to_doublest (const struct floatformat *,
const void *in, DOUBLEST *out);
extern void floatformat_from_doublest (const struct floatformat *,
const DOUBLEST *in, void *out);
extern int floatformat_is_negative (const struct floatformat *,
const bfd_byte *);
extern enum float_kind floatformat_classify (const struct floatformat *,
const bfd_byte *);
extern const char *floatformat_mantissa (const struct floatformat *,
const bfd_byte *);
extern std::string floatformat_to_string (const struct floatformat *fmt,
const gdb_byte *in,
const char *format = nullptr);
/* Return the floatformat's total size in host bytes. */
extern size_t floatformat_totalsize_bytes (const struct floatformat *fmt);
extern DOUBLEST extract_typed_floating (const void *addr,
const struct type *type);
extern void store_typed_floating (void *addr, const struct type *type,
DOUBLEST val);
extern void convert_typed_floating (const void *from,
const struct type *from_type,
void *to, const struct type *to_type);
#endif
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