diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_llround.c')
-rw-r--r-- | sysdeps/ieee754/dbl-64/s_llround.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_llround.c b/sysdeps/ieee754/dbl-64/s_llround.c index c8b3c190b5..1d6a5205f1 100644 --- a/sysdeps/ieee754/dbl-64/s_llround.c +++ b/sysdeps/ieee754/dbl-64/s_llround.c @@ -1,5 +1,5 @@ /* Round double value to long long int. - Copyright (C) 1997-2015 Free Software Foundation, Inc. + Copyright (C) 1997-2016 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. @@ -17,9 +17,12 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ +#include <fenv.h> +#include <limits.h> #include <math.h> #include <math_private.h> +#include <fix-fp-int-convert-overflow.h> long long int @@ -65,8 +68,16 @@ __llround (double x) } else { - /* The number is too large. It is left implementation defined - what happens. */ +#ifdef FE_INVALID + /* The number is too large. Unless it rounds to LLONG_MIN, + FE_INVALID must be raised and the return value is + unspecified. */ + if (FIX_DBL_LLONG_CONVERT_OVERFLOW && x != (double) LLONG_MIN) + { + feraiseexcept (FE_INVALID); + return sign == 1 ? LLONG_MAX : LLONG_MIN; + } +#endif return (long long int) x; } |