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* math.c (math_gamma): get rid of direct comparison between too

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big double and integer, with gcc on x86_64.  [ruby-core:25257]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24738 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2009-09-02 07:50:16 +00:00
parent 274fa77e3f
commit 3fe5402dfa
3 changed files with 22 additions and 3 deletions
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11
test/ruby/test_math.rb
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@ -1,6 +1,10 @@
require 'test/unit'
class TestMath < Test::Unit::TestCase
def assert_infinity(a, *rest)
assert(!a.finite?, *rest)
end
def check(a, b)
err = [Float::EPSILON * 4, [a.abs, b.abs].max * Float::EPSILON * 256].max
assert_in_delta(a, b, err)
@ -189,6 +193,13 @@ class TestMath < Test::Unit::TestCase
check(2, Math.gamma(3))
check(15 * sqrt_pi / 8, Math.gamma(3.5))
check(6, Math.gamma(4))
# no SEGV [ruby-core:25257]
31.upto(65) do |i|
i = 1 << i
assert_infinity(Math.gamma(i))
assert_infinity(Math.gamma(i-1))
end
end
def test_lgamma