> This provides a slightly more accurate bounding limit for
> `computeNextExponentialSoftCapped`. Currently, if the maximum is specified as
> 12.0, it won't actually return a value larger than `1.5 * exponentialX0`
> (11.353912041222094); and the error gets worse as we go further into the
> tail. (This affects slightly less than 12 outputs per million for an ideal
> RNG.) This could cause the `while (computeNextExponentialSoftCapped(rng,
> limit) < limit)` check in `computeNextGaussian` on line 1402 to always be
> true, making `nextGaussian` loop infinitely in the worst case (with
> probability $$e^{-2^{63} exponentialX0} \approx 10^{-3.022 \times 10^{19}}$$
> for an ideal RNG); but more likely, it would give a result that was truncated
> too close to zero.
>
> This change is being tested prior to submission to OpenJDK by
> https://github.com/openjdk/jdk/pull/17703/commits/b8be051cbf40a6a05fafc6a2c76942e9e0b11fdf.
Chris Hennick has updated the pull request incrementally with three additional
commits since the last revision:
- Lower limit to fix timeout
- Fix?
- Revert "Fix?"
This reverts commit 5e29b6f924269410b800c4f5a367d7bc259be5b2.
-------------
Changes:
- all: https://git.openjdk.org/jdk/pull/17703/files
- new: https://git.openjdk.org/jdk/pull/17703/files/080f3ea8..efc3dc4c
Webrevs:
- full: https://webrevs.openjdk.org/?repo=jdk&pr=17703&range=13
- incr: https://webrevs.openjdk.org/?repo=jdk&pr=17703&range=12-13
Stats: 9 lines in 2 files changed: 1 ins; 0 del; 8 mod
Patch: https://git.openjdk.org/jdk/pull/17703.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/17703/head:pull/17703
PR: https://git.openjdk.org/jdk/pull/17703
