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| author | vlefevre <vlefevre@280ebfd0-de03-0410-8827-d642c229c3f4> | 2011-02-18 09:17:14 +0000 |
|---|---|---|
| committer | vlefevre <vlefevre@280ebfd0-de03-0410-8827-d642c229c3f4> | 2011-02-18 09:17:14 +0000 |
| commit | a11814e229ba7453197d0ad6179afbdc57291fdf (patch) | |
| tree | 1abc00fa9f4628a185ccbe818e3ede591b8ea4e2 /src/acos.c | |
| parent | 74dce53cf30ad3264fadeb4b47675e7c682e42fb (diff) | |
| download | mpfr-a11814e229ba7453197d0ad6179afbdc57291fdf.tar.gz | |
[src/acos.c] Support acos(0) in extremely reduced exponent range.
git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@7471 280ebfd0-de03-0410-8827-d642c229c3f4
Diffstat (limited to 'src/acos.c')
| -rw-r--r-- | src/acos.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/acos.c b/src/acos.c index 80b0c1c1a..45711702e 100644 --- a/src/acos.c +++ b/src/acos.c @@ -48,9 +48,11 @@ mpfr_acos (mpfr_ptr acos, mpfr_srcptr x, mpfr_rnd_t rnd_mode) { MPFR_ASSERTD(MPFR_IS_ZERO(x)); /* acos(0)=Pi/2 */ + MPFR_SAVE_EXPO_MARK (expo); inexact = mpfr_const_pi (acos, rnd_mode); mpfr_div_2ui (acos, acos, 1, rnd_mode); /* exact */ - MPFR_RET (inexact); + MPFR_SAVE_EXPO_FREE (expo); + return mpfr_check_range (acos, inexact, rnd_mode); } } |