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author | usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-01-31 13:47:33 +0000 |
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committer | usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2018-01-31 13:47:33 +0000 |
commit | cce645e6a7b1819922c3e9fa2c5bff0bc6d5dfa5 (patch) | |
tree | fb50797fe591d31dee7d9fd214467080be332bcc /math.c | |
parent | 3d6510c514fdc490d4704d12ef720a4a4d12bf45 (diff) |
merge revision(s) 54803: [Backport #14321]
* 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/branches/ruby_2_3@62141 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'math.c')
-rw-r--r-- | math.c | 5 |
1 files changed, 4 insertions, 1 deletions
@@ -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; |