/* IEEE floating point support declarations, for GDB, the GNU Debugger.
- Copyright 1991, 1994, 1995, 1997, 2000, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1991-2020 Free Software Foundation, Inc.
This file is part of GDB.
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. */
+Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
#if !defined (FLOATFORMAT_H)
#define FLOATFORMAT_H 1
#include "ansidecl.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+
/* A floatformat consists of a sign bit, an exponent and a mantissa. Once the
bytes are concatenated according to the byteorder flag, then each of those
fields is contiguous. We number the bits with 0 being the most significant
(i.e. BITS_BIG_ENDIAN type numbering), and specify which bits each field
contains with the *_start and *_len fields. */
-/* What is the order of the bytes. */
+/* What is the order of the bytes? */
enum floatformat_byteorders {
-
/* Standard little endian byte order.
EX: 1.2345678e10 => 00 00 80 c5 e0 fe 06 42 */
-
floatformat_little,
/* Standard big endian byte order.
EX: 1.2345678e10 => 42 06 fe e0 c5 80 00 00 */
-
floatformat_big,
/* Little endian byte order but big endian word order.
EX: 1.2345678e10 => e0 fe 06 42 00 00 80 c5 */
+ floatformat_littlebyte_bigword,
- floatformat_littlebyte_bigword
-
+ /* VAX byte order. Little endian byte order with 16-bit words. The
+ following example is an illustration of the byte order only; VAX
+ doesn't have a fully IEEE compliant floating-point format.
+ EX: 1.2345678e10 => 80 c5 00 00 06 42 e0 fe */
+ floatformat_vax
};
enum floatformat_intbit { floatformat_intbit_yes, floatformat_intbit_no };
/* Internal name for debugging. */
const char *name;
+
+ /* Validator method. */
+ int (*is_valid) (const struct floatformat *fmt, const void *from);
+
+ /* Is the format actually the sum of two smaller floating point
+ formats (IBM long double, as described in
+ gcc/config/rs6000/darwin-ldouble-format)? If so, this is the
+ smaller format in question, and the fields sign_start through
+ intbit describe the first half. If not, this is NULL. */
+ const struct floatformat *split_half;
};
/* floatformats for IEEE single and double, big and little endian. */
+extern const struct floatformat floatformat_ieee_half_big;
+extern const struct floatformat floatformat_ieee_half_little;
extern const struct floatformat floatformat_ieee_single_big;
extern const struct floatformat floatformat_ieee_single_little;
extern const struct floatformat floatformat_ieee_double_big;
extern const struct floatformat floatformat_ieee_double_littlebyte_bigword;
+/* floatformats for VAX. */
+
+extern const struct floatformat floatformat_vax_f;
+extern const struct floatformat floatformat_vax_d;
+extern const struct floatformat floatformat_vax_g;
+
/* floatformats for various extendeds. */
extern const struct floatformat floatformat_i387_ext;
extern const struct floatformat floatformat_ia64_spill_little;
extern const struct floatformat floatformat_ia64_quad_big;
extern const struct floatformat floatformat_ia64_quad_little;
+/* IBM long double (double+double). */
+extern const struct floatformat floatformat_ibm_long_double_big;
+extern const struct floatformat floatformat_ibm_long_double_little;
/* Convert from FMT to a double.
FROM is the address of the extended float.
Store the double in *TO. */
extern void
-floatformat_to_double PARAMS ((const struct floatformat *, const char *, double *));
+floatformat_to_double (const struct floatformat *, const void *, double *);
/* The converse: convert the double *FROM to FMT
and store where TO points. */
extern void
-floatformat_from_double PARAMS ((const struct floatformat *,
- const double *, char *));
+floatformat_from_double (const struct floatformat *, const double *, void *);
/* Return non-zero iff the data at FROM is a valid number in format FMT. */
extern int
-floatformat_is_valid PARAMS ((const struct floatformat *fmt, const char *from));
+floatformat_is_valid (const struct floatformat *fmt, const void *from);
+
+#ifdef __cplusplus
+}
+#endif
#endif /* defined (FLOATFORMAT_H) */