RFR: 8285868: x86_64 intrinsics for floating point methods isNaN, isFinite and isInfinite [v4]

Wed May 18 06:05:47 UTC 2022

On Wed, 18 May 2022 05:54:40 GMT, Srinivas Vamsi Parasa <duke at openjdk.java.net> wrote:

>> Will try the `xor dst, dst` and see the performance changes.
>
> setb either writes a 0 or 1 based on the condition. So, will it cause partial writes?

Actually `setb` only writes the byte portion and leaves the remaining of the register intact, so it would be wrong without clearing the register beforehand.

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PR: https://git.openjdk.java.net/jdk/pull/8459