RFR: 8264945: Optimize the code-gen for Math.pow(x, 0.5) [v2]

Jie Fu jiefu at openjdk.java.net
Tue Apr 20 22:43:04 UTC 2021

On Tue, 20 Apr 2021 16:49:58 GMT, Andrew Haley <aph at openjdk.org> wrote:

> This may be unsafe. AFAIK there is no guarantee about the monotonicity of `Math.pow(x, y)` as y moves from `Math.pow(x, nextAfter​(0.5, -1)` to `Math.pow(x, 0.5)` to `Math.pow(x, nextAfter​(0.5, 1)` for all x. Did anyone look?

Thanks @theRealAph for your review.

What did you mean by `Math.pow(x, nextAfter​(0.5, -1)`  and `Math.pow(x, nextAfter​(0.5, 1)` ?


PR: https://git.openjdk.java.net/jdk/pull/3404

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