RFR: 8302908: RISC-V: Support masked vector arithmetic instructions for Vector API [v24]

[Gui Cao]

On Fri, 21 Apr 2023 08:58:31 GMT, Feilong Jiang <fjiang at openjdk.org> wrote:

>> Dingli Zhang has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   rename fp and modify VectorMaskGen node
>
> src/hotspot/cpu/riscv/c2_MacroAssembler_riscv.hpp line 234:
> 
>> 232: 
>> 233:   // Clear vector registers independent of previous vl and vtype.
>> 234:   void clear_register_v(VectorRegister v) {
> 
> Do we still need `clear_register_v`? There seems to be nowhere to use it anymore.

Fixed.

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PR Review Comment: https://git.openjdk.org/jdk/pull/12682#discussion_r1173761273