mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-24 02:24:46 +08:00
61baf725ec
This applies the second part of GDB's End of Year Procedure, which
updates the copyright year range in all of GDB's files.
gdb/ChangeLog:
Update copyright year range in all GDB files.
105 lines
3.9 KiB
C
105 lines
3.9 KiB
C
/* 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;
|
|
|
|
/* Setup definitions for host and target floating point formats. We need to
|
|
consider the format for `float', `double', and `long double' for both target
|
|
and host. We need to do this so that we know what kind of conversions need
|
|
to be done when converting target numbers to and from the hosts DOUBLEST
|
|
data type. */
|
|
|
|
/* This is used to indicate that we don't know the format of the floating point
|
|
number. Typically, this is useful for native ports, where the actual format
|
|
is irrelevant, since no conversions will be taking place. */
|
|
|
|
#include "floatformat.h" /* For 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 *);
|
|
|
|
/* Given TYPE, return its floatformat. TYPE_FLOATFORMAT() may return
|
|
NULL. type_floatformat() detects that and returns a floatformat
|
|
based on the type size when FLOATFORMAT is NULL. */
|
|
|
|
const struct floatformat *floatformat_from_type (const struct type *type);
|
|
|
|
/* 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
|