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Bug #8358

Updated by nobu (Nobuyoshi Nakada) over 10 years ago

I noticed TestSprintf#test_float 
 http://ci.rubyinstaller.org/job/ruby-trunk-x86-test-all/1287/console 

 ~~~ 
   1) Failure: 
 TestSprintf#test_float [C:/Users/Worker/Jenkins/workspace/ruby-trunk-x86-build/test/ruby/test_sprintf.rb:193]: 
 [ruby-dev:42551]. 
 <"0x1p+2"> expected but was 
 <"0x1p+1">. 
 ~~~ 

 This failure is due to r40404. 

 And Actually, this issue is almost same to bug #8299. 
 ruby_hdtoa function requires 53-bit precision  
 but mingw32 compiler is 64-bit precision. 

 There are 2 possible workarounds. 

 1. adding    -msse2 -mfpmath=sse flag when compiling. 
 2. adding    _control87(_PC_53, _MCW_PC) when running. 

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