diff options
Diffstat (limited to 'misc/efgcvt_r.c')
| -rw-r--r-- | misc/efgcvt_r.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/misc/efgcvt_r.c b/misc/efgcvt_r.c index 944fe4cc98..d73fd22f70 100644 --- a/misc/efgcvt_r.c +++ b/misc/efgcvt_r.c @@ -30,7 +30,12 @@ # define FUNC_PREFIX # define FLOAT_FMT_FLAG # define FLOAT_NAME_EXT -# define NDIGIT_MAX DBL_DIG +# if DBL_MANT_DIG == 53 +# define NDIGIT_MAX 17 +# else +/* See IEEE 854 5.6, table 2 for this formula. */ +# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * DBL_MANT_DIG + 1.0))) +# endif #endif #define APPEND(a, b) APPEND2 (a, b) |