summaryrefslogtreecommitdiff
path: root/math.c
diff options
context:
space:
mode:
authorodaira <odaira@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2016-04-27 20:00:57 (GMT)
committerodaira <odaira@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2016-04-27 20:00:57 (GMT)
commit7a3f794da0fbfacb99c0721271990d39c9885928 (patch)
tree3962f58746db2f87245b19e067bcb307ac563b4d /math.c
parent173005bb6fa9c4b2f54633313f4ff352348a3eeb (diff)
* configure.in (rb_cv_lgamma_r_pm0): check if lgamma_r(+0.0)
returns positive infinity, in addition to lgamma_r(-0.0). AIX returns an incorrect result of negative infinity. * math.c (ruby_lgamma_r): handle +0.0, in addition to -0.0. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54803 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'math.c')
-rw-r--r--math.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/math.c b/math.c
index 9ac898f..c3fe7db 100644
--- a/math.c
+++ b/math.c
@@ -750,7 +750,7 @@ ruby_tgamma(const double d)
#define tgamma(d) ruby_tgamma(d)
#endif
-#if defined LGAMMA_R_M0_FIX
+#if defined LGAMMA_R_PM0_FIX
static inline double
ruby_lgamma_r(const double d, int *sign)
{
@@ -759,6 +759,9 @@ ruby_lgamma_r(const double d, int *sign)
if (d == 0.0 && signbit(d)) {
*sign = -1;
return INFINITY;
+ } else if (d == 0.0 && !signbit(d)) {
+ *sign = 1;
+ return INFINITY;
}
}
return g;