On Tue, 19 Apr 2022 08:41:50 GMT, Jie Fu <[email protected]> wrote:
> Hi all,
>
> The Current Vector API doc for `LSHR` is
>
> Produce a>>>(n&(ESIZE*8-1)). Integral only.
>
>
> This is misleading which may lead to bugs for Java developers.
> This is because for negative byte/short elements, the results computed by
> `LSHR` will be different from that of `>>>`.
> For more details, please see
> https://github.com/openjdk/jdk/pull/8276#issue-1206391831 .
>
> After the patch, the doc for `LSHR` is
>
> Produce zero-extended right shift of a by (n&(ESIZE*8-1)) bits. Integral only.
>
>
> Thanks.
> Best regards,
> Jie
We can raise attention to that:
/** Produce {@code a>>>(n&(ESIZE*8-1))}
* (The operand and result are converted if the operand type is {@code byte}
or {@code short}, see below). Integral only.
* ...
*/
-------------
PR: https://git.openjdk.java.net/jdk/pull/8291
