RFR: 4511638: Double.toString(double) sometimes produces incorrect results [v14]

[Brian Burkhalter]

On Tue, 31 May 2022 17:07:06 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

src/java.base/share/classes/jdk/internal/math/DoubleToDecimal.java line 72:

> 70:     static final int E_MAX = 309;
> 71: 
> 72:     /* Threshold to detect tiny values, as in section 8.2.1 of [1] */

Comments like this one pointing to specific places in the Schubfach paper are very helpful in understanding the constants and the various steps in the algorithm.

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