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| author | Joseph Myers <joseph@codesourcery.com> | 2012-03-07 15:15:19 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2012-03-07 15:15:19 +0000 |
| commit | d1d3431a3a9dd14501eedb701436bd5005b1db7d (patch) | |
| tree | 39d3514fc227717e59ebd11e94c822491a8b382d /math/s_casinh.c | |
| parent | a4300c7a4d65e24a4a0215460c063ea9c7b4605a (diff) | |
| download | glibc-d1d3431a3a9dd14501eedb701436bd5005b1db7d.tar.gz glibc-d1d3431a3a9dd14501eedb701436bd5005b1db7d.tar.xz glibc-d1d3431a3a9dd14501eedb701436bd5005b1db7d.zip | |
Fix signs of zeros from casinh, cacosh etc. (bug 10716).
Diffstat (limited to 'math/s_casinh.c')
| -rw-r--r-- | math/s_casinh.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/math/s_casinh.c b/math/s_casinh.c index e06be1cdc6..24ae676a8f 100644 --- a/math/s_casinh.c +++ b/math/s_casinh.c @@ -1,5 +1,5 @@ /* Return arc hyperbole sine for double value. - Copyright (C) 1997, 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 @@ __casinh (__complex__ double x) __imag__ y += __imag__ x; res = __clog (y); + + /* Ensure zeros have correct sign and results are correct if + very close to branch cuts. */ + __real__ res = __copysign (__real__ res, __real__ x); + __imag__ res = __copysign (__imag__ res, __imag__ x); } return res; |