diff options
Diffstat (limited to 'math/s_casinhl.c')
| -rw-r--r-- | math/s_casinhl.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/math/s_casinhl.c b/math/s_casinhl.c index de41cb8999..80d7bf500d 100644 --- a/math/s_casinhl.c +++ b/math/s_casinhl.c @@ -1,5 +1,5 @@ /* Return arc hyperbole sine for long double value. - Copyright (C) 1997, 1998, 2011 Free Software Foundation, Inc. + Copyright (C) 1997-2012 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. @@ -73,6 +73,11 @@ __casinhl (__complex__ long double x) __imag__ y += __imag__ x; res = __clogl (y); + + /* Ensure zeros have correct sign and results are correct if + very close to branch cuts. */ + __real__ res = __copysignl (__real__ res, __real__ x); + __imag__ res = __copysignl (__imag__ res, __imag__ x); } return res; |