diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/mpn2ldbl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/mpn2ldbl.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/mpn2ldbl.c b/sysdeps/ieee754/ldbl-128ibm/mpn2ldbl.c index bacb2cc98b..90dae9325d 100644 --- a/sysdeps/ieee754/ldbl-128ibm/mpn2ldbl.c +++ b/sysdeps/ieee754/ldbl-128ibm/mpn2ldbl.c @@ -18,6 +18,7 @@ #include "gmp.h" #include "gmp-impl.h" #include <ieee754.h> +#include <errno.h> #include <float.h> #include <math.h> @@ -111,6 +112,14 @@ __mpn_construct_long_double (mp_srcptr frac_ptr, int expt, int sign) { hi >>= 1; u.d[0].ieee.exponent++; + if (u.d[0].ieee.exponent == IEEE754_DOUBLE_BIAS + DBL_MAX_EXP) + { + /* Overflow. The appropriate overflowed result must + be produced (if an infinity, that means the low + part must be zero). */ + __set_errno (ERANGE); + return (sign ? -LDBL_MAX : LDBL_MAX) * LDBL_MAX; + } } u.d[1].ieee.negative = !sign; lo = (1LL << 53) - lo; |