Integrated: 8342882: RISC-V: Unify handling of jumps to runtime

[Fei Yang]

On Wed, 23 Oct 2024 10:20:10 GMT, Fei Yang <fyang at openjdk.org> wrote:

> This fixes and unifies handling of jumps to runtime. Was previously discussed here [1]. ( Tagging @robehn )
> Seems not reasonable for `MacroAssembler::j(const Address &dest, Register temp)` to directly delegate work to `MacroAssembler::j(const address dest, Register temp)` for literal Address. This could generate a plain `JAL`, which means when we relocate the code, but the `JAL` immediate could be too large. This change relaxes this constaint.
> 
> [1] https://github.com/openjdk/jdk/pull/21406#issuecomment-2415965656
> 
> Simply did a native fastdebug build and tried specjbb2005 workload.
> More testing on linux-riscv64 in progress.
> - [x] tier1 - tier3 (release)
> - [x] hotspot:tier1 (fastdebug)

This pull request has now been integrated.

Changeset: 85774b71
Author:    Fei Yang <fyang at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/85774b713edf8782f162ac25b61ce99a77e116f4
Stats:     31 lines in 7 files changed: 2 ins; 9 del; 20 mod

8342882: RISC-V: Unify handling of jumps to runtime

Reviewed-by: rehn

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PR: https://git.openjdk.org/jdk/pull/21661