diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-96/e_gammal_r.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/e_gammal_r.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sysdeps/ieee754/ldbl-96/e_gammal_r.c b/sysdeps/ieee754/ldbl-96/e_gammal_r.c index 104992450b..376d2b9d94 100644 --- a/sysdeps/ieee754/ldbl-96/e_gammal_r.c +++ b/sysdeps/ieee754/ldbl-96/e_gammal_r.c @@ -1,5 +1,5 @@ /* Implementation of gamma function according to ISO C. - Copyright (C) 1997, 1999 Free Software Foundation, Inc. + Copyright (C) 1997, 1999, 2001 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. @@ -38,12 +38,18 @@ __ieee754_gammal_r (long double x, int *signgamp) *signgamp = 0; return x / x; } - if ((hx & 0x8000) != 0 && (hx & 0x7fff) != 0x7fff && __rintl (x) == x) + if ((es & 0x8000) != 0 && x < 0xffffffff && __rintl (x) == x) { /* Return value for integer x < 0 is NaN with invalid exception. */ *signgamp = 0; return (x - x) / (x - x); } + if (es == 0xffffffff && ((hx & 0x7fffffff) | lx) == 0) + { + /* x == -Inf. According to ISO this is NaN. */ + *signgamp = 0; + return x - x; + } /* XXX FIXME. */ return __ieee754_expl (__ieee754_lgammal_r (x, signgamp)); |