JDK 9 RFR of JDK-8033416: Remove sun.misc.FpUtils

Joe Darcy joe.darcy at oracle.com
Mon Feb 3 17:57:23 UTC 2014

Hi Alan,

I was on the fence about whether or not to include the bug id in the 
test; after you comment, I've removed it in the version that was pushed.

Thanks for the review,


On 02/01/2014 01:23 PM, Alan Bateman wrote:
> On 01/02/2014 18:13, Joe Darcy wrote:
>> Hello,
>> Back in JDK 5, the sun.misc.FpUtils class was added to provide 
>> low-level floating-point manipulations methods needed to write tests 
>> of the math library. Over time, those low-level functions have 
>> generally been added to the standard Java library and most of the 
>> methods in FpUtils have thus been deprecated.
>> Therefore, I think the start of JDK 9 is a good time to actually 
>> remove FpUtils from the platform; please review my change which does 
>> this:
>>     http://cr.openjdk.java.net/~darcy/8033416.0/
>> The implementation of the ilogb and isUnordered methods was moved 
>> into the "Tests" helper class in the math library test directory.
>> (At the recommendation of Alan in the bug report, I verified that the 
>> fx jar files do not reference the FpUtils class.)
> I may have mixed it up with FloatConsts or DouleConsts but I'm pretty 
> sure there was a dependency at one point. The main thing is that we've 
> checked and all is okay.
> I skimmed over the webrev and it looks good to me (I didn't check 
> ilogb closely but I assume it has just moved without any changes). One 
> minor comment is that I'm not sure that it's worth add the bug number 
> to IeeeRecommendedTests as the change doesn't introduce any tests or 
> fix issues that would be interested in check back on in the future.
> -Alan.

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