[jdk25u] RFR: 8364120: RISC-V: unify the usage of MacroAssembler::instruction_size

Sun Aug 10 23:35:27 UTC 2025

Hi all,

This pull request contains a backport of commit [7bf4c608](https://github.com/openjdk/jdk/commit/7bf4c608e7b23398ea89cf0a592e9554af98144e) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Hamlin Li on 28 Jul 2025 and was reviewed by Fei Yang.

Thanks!

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Commit messages:
 - Backport 7bf4c608e7b23398ea89cf0a592e9554af98144e

Changes: https://git.openjdk.org/jdk25u/pull/81/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u&pr=81&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8364120
  Stats: 38 lines in 2 files changed: 0 ins; 0 del; 38 mod
  Patch: https://git.openjdk.org/jdk25u/pull/81.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/81/head:pull/81

PR: https://git.openjdk.org/jdk25u/pull/81