RFR: 4511638: Double.toString(double) sometimes produces incorrect results [v2]

[Raffaello Giulietti]

On Fri, 16 Apr 2021 11:30:32 GMT, Raffaello Giulietti <duke at openjdk.java.net> wrote:

>> Hello,
>> 
>> here's a PR for a patch submitted on March 2020 [1](https://cr.openjdk.java.net/~bpb/4511638/webrev.04/) when Mercurial was a thing.
>> 
>> The patch has been edited to adhere to OpenJDK code conventions about multi-line (block) comments. Nothing in the code proper has changed, except for the addition of redundant but clarifying parentheses in some expressions.
>> 
>> 
>> Greetings
>> Raffaello
>
> Raffaello Giulietti has updated the pull request incrementally with one additional commit since the last revision:
> 
>   4511638: Double.toString(double) sometimes produces incorrect results

Hello,

Paul Zimmermann of INRIA kindly provided me 19'545 doubles generated on purpose as hard test cases.
All have the form 2^q*10^(-k), with k as in my writing (https://drive.google.com/file/d/1luHhyQF9zKlM8yJ1nebU0OgVYhfC6CBN/view)

They all pass on my machine and will be added to the this PR asap.

Greetings
Raffaello

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PR: https://git.openjdk.java.net/jdk/pull/3402