ruby.git/math.c, branch v2_4_0_preview2

math.c: faster tanh

2016-08-02T12:42:42+00:00

* math.c (tanh): make faster by the extract form if three
  hyperbolic functions are unavailable.  [Feature #12647]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55799 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

math.c: tanh overflow

2016-08-02T12:40:51+00:00

* math.c (tanh): check overflows, and return +-1.0.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55798 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* math.c (_USE_MATH_DEFINES): it must be set before including internal.h

2016-07-13T07:03:23+00:00

  because internal.h includes ruby.h, ruby.h includes win32.h, and
  win32.h includes system's math.h.
  this change is to get rid of a compiler warning (redefinition of
  a macro) introduced at r55641.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55662 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

fix type

2016-07-13T05:47:48+00:00

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55659 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* math.c (rb_math_sqrt): r55646 must use f_signbit.

2016-07-13T05:29:30+00:00

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55657 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

math.c: Complex sqrt

2016-07-12T14:13:46+00:00

* math.c (rb_math_sqrt): [EXPERIMENTAL] move Complex sqrt support
  from mathn.rb.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55646 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

math.c: get_double_rshift

2016-07-12T13:07:51+00:00

* math.c (get_double_rshift): extract bignum to double conversion
  with bit offset.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55644 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

math.c: use common constants

2016-07-12T11:53:43+00:00

* math.c (math_log1, math_log10): use common math constants
  instead of math function calls.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55641 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* configure.in (rb_cv_lgamma_r_pm0): check if lgamma_r(+0.0)

2016-04-27T20:00:57+00:00

  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

configure.in: check lgamma_r(-0.0)

2016-04-06T05:13:29+00:00

* configure.in (rb_cv_lgamma_r_m0): check if lgamma_r(-0.0)
  returns negative infinity.  [Bug #12249]
* math.c (ruby_lgamma_r): define by the configured result.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54499 b2dd03c8-39d4-4d8f-98ff-823fe69b080e