Integrated: 8293566: RISC-V: Clean up push and pop registers

[Feilong Jiang]

On Fri, 9 Sep 2022 08:31:02 GMT, Feilong Jiang <fjiang at openjdk.org> wrote:

> Currently, riscv port has two implementations of `push_reg` and `pop_reg`.
> The bitset version can be replaced with the RegSet version for better readability.
> 
> For example, if we want to push x10 and x11, pushing register with bitset would be like:
> 
> push_reg(0xc00, sp)
> 
> 
> while pushing register with RegSet will be more clear:
> 
> push_reg(RegSet::of(x10, x11), sp);
> 
> 
> Testing:
> 
> - hotspot and jdk ter1 on QEMU without new failures

This pull request has now been integrated.

Changeset: 68645ebf
Author:    Feilong Jiang <fjiang at openjdk.org>
Committer: Fei Yang <fyang at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/68645ebffb28605fa2c6afef11f8265fd350b5cb
Stats:     63 lines in 5 files changed: 13 ins; 18 del; 32 mod

8293566: RISC-V: Clean up push and pop registers

Reviewed-by: fyang, shade

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PR: https://git.openjdk.org/jdk/pull/10227