diff options
Diffstat (limited to 'include/floatformat.h')
| -rw-r--r-- | include/floatformat.h | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/include/floatformat.h b/include/floatformat.h index 53ead3eee..3d0fd7a87 100644 --- a/include/floatformat.h +++ b/include/floatformat.h @@ -1,5 +1,5 @@ /* IEEE floating point support declarations, for GDB, the GNU Debugger. - Copyright 1991, 1994, 1995, 1997, 2000 Free Software Foundation, Inc. + Copyright 1991, 1994, 1995, 1997, 2000, 2003 Free Software Foundation, Inc. This file is part of GDB. @@ -61,8 +61,12 @@ struct floatformat unsigned int exp_start; unsigned int exp_len; - /* Amount added to "true" exponent. 0x3fff for many IEEE extendeds. */ - unsigned int exp_bias; + /* Bias added to a "true" exponent to form the biased exponent. It + is intentionally signed as, otherwize, -exp_bias can turn into a + very large number (e.g., given the exp_bias of 0x3fff and a 64 + bit long, the equation (long)(1 - exp_bias) evaluates to + 4294950914) instead of -16382). */ + int exp_bias; /* Exponent value which indicates NaN. This is the actual value stored in the float, not adjusted by the exp_bias. This usually consists of all one bits. */ @@ -109,13 +113,18 @@ extern const struct floatformat floatformat_ia64_quad_little; Store the double in *TO. */ extern void -floatformat_to_double PARAMS ((const struct floatformat *, char *, double *)); +floatformat_to_double PARAMS ((const struct floatformat *, const char *, double *)); /* The converse: convert the double *FROM to FMT and store where TO points. */ extern void floatformat_from_double PARAMS ((const struct floatformat *, - double *, char *)); + const double *, char *)); + +/* 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)); #endif /* defined (FLOATFORMAT_H) */ |