nobu	2007-05-09 11:50:04 +0900 (Wed, 09 May 2007)

  New Revision: 12260

  Modified files:
    branches/ruby_1_8/ChangeLog
    branches/ruby_1_8/bignum.c

  Log:
    * bignum.c (rb_big_pow): reduce multiplying for even number.
    
    * bignum.c (rb_big_pow): truncate all zero BDIGITs. [ruby-dev:30733]
    
    * bignum.c (rb_big_pow): improvement by calculating from MSB and using
      factorization.  <http://yowaken.dip.jp/tdiary/20070426.html#p01>
    
    * numeric.c (int_pow): calculate power in Fixnum as possible.
      [ruby-dev:30726]


  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/branches/ruby_1_8/ChangeLog?r1=12260&r2=12259
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/branches/ruby_1_8/bignum.c?r1=12260&r2=12259