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* util.c (ruby_strtod): this code uses FPU's rounding system.

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But x86's FPU calculates double precision floating-point
  numbers in 80bit precision, so it fails to round the value.
  So ensure the value is assigned a variable. [ruby-dev:42551]
  see also [ruby-math:00802]
  http://www.shudo.net/java-grandprix99/strictfp/

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29729 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
naruse 2010-11-09 01:57:49 +00:00
parent b3c7867df7
commit c383fbf93f
3 changed files with 16 additions and 2 deletions
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2
test/ruby/test_sprintf.rb
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@ -190,6 +190,8 @@ class TestSprintf < Test::Unit::TestCase
sprintf("%20.0f", 36893488147419107329.0))
assert_equal(" Inf", sprintf("% 0e", 1.0/0.0), "moved from btest/knownbug")
assert_equal(" -0.", sprintf("%#10.0f", -0.5), "[ruby-dev:42552]")
assert_equal("0x1.p+2", sprintf('%.0a', Float('0x1.fp+1')), "[ruby-dev:42551]")
assert_equal("-0x1.0p+2", sprintf('%.0a', Float('-0x1.ffp+1')), "[ruby-dev:42551]")
end
def test_float_hex