RFR: 8318158: RISC-V: implement roundD/roundF intrinsics [v6]

[Andrew Haley]

On Fri, 8 Dec 2023 09:59:16 GMT, Vladimir Kempik <vkempik at openjdk.org> wrote:

> > That is, to say the very least, surprising. I'd use -prof:perfasm to find out why.
> 
> -prof:perfasm doesn't work on u74 boards(hifive and visionfive2) as is, some problems with cycles event. This works: -prof perfasm:"events=cpu-clock" but it's s/w event, still better than nothing.

It is. We should not simply accept something like this without trying to understand the reason.

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PR Comment: https://git.openjdk.org/jdk/pull/16382#issuecomment-1846927197