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* numeric.c (fix_pow): integer power calculation: 0**n => 0,

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1**n => 1, -1**n => 1 (n: even) / -1 (n: odd).

* test/ruby/test_fixnum.rb (TestFixnum::test_pow): update test
  suite.  pow(-3, 2^64) gives NaN when pow(3, 2^64) gives Inf.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12789 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
matz 2007-07-14 14:31:21 +00:00
parent bb44ba9b72
commit 7f0bb427e0
3 changed files with 29 additions and 6 deletions
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test/ruby/test_fixnum.rb
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@ -12,7 +12,7 @@ class TestFixnum < Test::Unit::TestCase
def test_pow
[1, 2, 2**64, 2**63*3, 2**64*3].each do |y|
[1, 3].each do |x|
[-1, 0, 1].each do |x|
z1 = x**y
z2 = (-x)**y
if y % 2 == 1