[jdk17u-dev] RFR: 8339248: RISC-V: Remove li64 macro assembler routine and related code

[Fei Yang]

On Tue, 3 Sep 2024 10:13:49 GMT, Gui Cao <gcao at openjdk.org> wrote:

> Hi, The same issue also exists in jdk17u. So I would like to backport [JDK-8339248](https://bugs.openjdk.org/browse/JDK-8339248) to jdk17u-dev. with this patch ,it will save us some unnecessary runtime checks. This is a risc-v specific change, risk is low.
> 
> ### Testing
> - [x] Run hotspot:tier1 tests on SOPHON SG2042 (release)

LGTM. Thanks.

-------------

Marked as reviewed by fyang (Reviewer).

PR Review: https://git.openjdk.org/jdk17u-dev/pull/2842#pullrequestreview-2277224086