[jdk21u-dev] Integrated: 8330094: RISC-V: Save and restore FRM in the call stub

[Gui Cao]

On Tue, 30 Apr 2024 13:08:50 GMT, Gui Cao <gcao at openjdk.org> wrote:

> Hi, The same issue also exists in JDK21u. So I would like to backport [JDK-8330094](https://bugs.openjdk.org/browse/JDK-8330094) to jdk21u-dev. With this change, we save and restore the default floating-point control state when we enter and leave Java code, ensuring that we are still Java compatible if we're called via the JNI invocation interface with a weird FP control state. RISC-V specific change, risk is low.
> The backport is not clean because jdk21u-dev has no [JDK-8321021](https://bugs.openjdk.org/browse/JDK-8321021)
> 
> ### Testing
> 
> - [x]  Run tier1-3 tests on SOPHON SG2042 (release)

This pull request has now been integrated.

Changeset: 835d016a
Author:    Gui Cao <gcao at openjdk.org>
Committer: Fei Yang <fyang at openjdk.org>
URL:       https://git.openjdk.org/jdk21u-dev/commit/835d016ade123a053c283589da472a96a4afae1e
Stats:     34 lines in 3 files changed: 21 ins; 9 del; 4 mod

8330094: RISC-V: Save and restore FRM in the call stub

Reviewed-by: fyang
Backport-of: b0496096dc8d7dc7acf28aa006141a3ecea446de

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

PR: https://git.openjdk.org/jdk21u-dev/pull/545