On Wednesday, February 13, 2013 9:01:26 AM UTC-5, Brent Baker wrote:
>
>
>> Are you compiling with clang?  It has a bug (fixed in HEAD) that 
>> affects how it represents NaNs. 
>>
>>
> Yeah I am compiling with clang, thanks for the heads up:
> $ cc -v
> Apple LLVM version 4.2 (clang-425.0.24) (based on LLVM 3.2svn)
> Target: x86_64-apple-darwin11.4.2
> Thread model: posix
>

Just a  quick update on this, I tried with the current HEAD of clang and it 
has fixed the issue with NaN on ia32.


*clang -v:* clang version 3.3 (trunk 175057)
> var buff = new Buffer(4);
> buff.writeFloatLE(NaN, 0);
> buff
<Buffer 00 00 c0 *7f*> // <--- correct value

The version of clang that ships with xcode produces an incorrect value for 
NaN:
*clang -v: *Apple LLVM version 4.2 (clang-425.0.24) (based on LLVM 3.2svn):
> var buff = new Buffer(4);
> buff.writeFloatLE(NaN, 0);
> buff
<Buffer 00 00 c0* ff*> // <--- incorrect value

>  
>

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