[jdk21u] RFR: 8316933: RISC-V: compiler/vectorapi/VectorCastShape128Test.java fails when using RVV

[Gui Cao]

On Wed, 27 Sep 2023 07:28:24 GMT, Gui Cao <gcao at openjdk.org> wrote:

> Hi, This issue also exists in the JDK21U, so i would like to backport this to jdk21u make vector api work correctly using latest qemu. see jbs issue for exception information.
> 
> zifeihan at plct-c8:~/qemu-master-riscv64/bin$ ./qemu-riscv64 -version
> qemu-riscv64 version 8.1.50
> Copyright (c) 2003-2023 Fabrice Bellard and the QEMU Project developers
> 
> By the way, using a lower version of qemu (qemu-riscv64 version 7.0.91) no such problems were encountered. we infer that version 8.1.50 of qemu adds better checks.
> `test/hotspot/jtreg/compiler/vectorapi/VectorCastShape128Test.java` passed with fastdebug and using latest qemu.
> ### Testing:
> qemu 8.1.50 with UseRVV:
> - [x] Tier1 tests (release)
> - [x] Tier2 tests (release)
> - [x] Tier3 tests (release)
> - [x] test/jdk/jdk/incubator/vector (fastdebug)

Got jdk21 push approval.

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PR Comment: https://git.openjdk.org/jdk21u/pull/206#issuecomment-1739535337