* bignum.c (power_cache_get_power): declare as inline before call to
suppress warnings from gcc 4.2.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42363 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
algorighms should check smaller argument because Karatsuba and Toom3
is effective only if both arguments are big.
(bary_mul_toom3_branch): Compare the smaller argument to
TOOM3_MUL_DIGITS.
(bary_mul): Compare the smaller argument to KARATSUBA_MUL_DIGITS.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42360 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
BDIGIT array and size.
(big2str_karatsuba): Receive the number to stringize as BDIGIT array
and size. Use an temporary array of BDIGIT.
(rb_big2str1): Follow the above change.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42356 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
bigsq.
(big2str_karatsuba): Fix number of leading zero characters.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42335 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
(rb_big2str0): Non-trim mode implemented here.
(big2str_find_n1): Change the result type to long again.
(big2str_base_powerof2): Don't take arguments: len and trim.
(rb_big2str): Follow above change.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42305 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
It is called after actual length is calculated.
(big2str_struct): Add fields: negative, result and ptr.
(big2str_orig): Write out the result via b2s->ptr.
(big2str_orig): Ditto.
(rb_big2str1): Don't allocate the result string at beginning.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42303 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
(KARATSUBA_BIG2STR_DIGITS): Removed.
(big2str_numdigits_cache): New variable.
(power_cache_get_power): Merged with power_cache_get_power0.
This function returns maxpow_in_bdigit_dbl(base)**(2**power_level).
(rb_big2str1): use power_cache_get_power.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42295 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
(power_cache_get_power): Change n1 argument (number of digits) to
power_level which is just passed to power_cache_get_power0.
(big2str_karatsuba): Ditto.
(rb_big2str1): Calculate the initial power_level.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42285 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
(power_cache_get_power0): Add rb_bug call for too bit i argument.
(power_cache_get_power): Simplified.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42274 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
[ruby-core:55578] [Feature #8553]
This is accepted by matz on DevelopersMeeting20130727Japan.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42204 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
(TOOM3_BALANCED): Ditto.
(bary_mul_balance_with_mulfunc): Use KARATSUBA_BALANCED and
TOOM3_BALANCED.
(rb_big_mul_balance): Relax a condition.
(rb_big_mul_karatsuba): Use KARATSUBA_BALANCED.
(rb_big_mul_toom3): Use TOOM3_BALANCED.
(bary_mul_karatsuba_branch): Use KARATSUBA_BALANCED.
(bary_mul_toom3_branch): Use TOOM3_BALANCED.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42122 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
(rb_cstr_to_inum): Invoke bigsq instead of bigmul0.
(bigsq): Re-implemented.
(bigmul0): Invoke bigsq if two arguments are identical.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42096 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
SIZEOF_BDIGITS is added.
(bary_mul_precheck): Reduce comparisons.
(bary_mul): Invoke bary_sq_fast or bary_mul1 if the bignum size is
small.
(bigfixize): Resize the argument bignum here.
(bignorm): Don't call bigtrunc after bigfixize.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42028 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
