[riscv-port-jdk11u:riscv-port] RFR: 8283865: riscv: Break down -XX:+UseRVB into seperate options for each bitmanip extension

[Fei Yang]

On Thu, 21 Mar 2024 10:42:20 GMT, Gui Cao <gcao at openjdk.org> wrote:

> Hi, The same issue[1] also exists in the riscv-port-jdk11u. According to the spec,  we need to break down UseRVB into two individual options UseZba and UseZbb to enable or disable Zba and Zbb respectively. 
> 
> Linux RISCV64 release hotspot/jdk tier1 tests are passed on QEMU with following options:
>  - [x] +UseZba && +UseZbb
>  - [x] +UseZba && -UseZbb
>  - [x] -UseZba && +UseZbb

Backport looks good. Thanks.

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Marked as reviewed by fyang (Lead).

PR Review: https://git.openjdk.org/riscv-port-jdk11u/pull/13#pullrequestreview-1957484442