RFR: 8342768: GTest AssemblerX86.validate_vm failed: assert(VM_Version::supports_bmi1()) failed: tzcnt instruction not supported [v2]

[Vladimir Kozlov]

On Tue, 22 Oct 2024 18:11:45 GMT, hanklo6 <duke at openjdk.org> wrote:

>> The `tzcnt` instruction requires the VM to support `bmi1` feature, which we set directly when running the test.
>
> hanklo6 has updated the pull request incrementally with one additional commit since the last revision:
> 
>   set avx and evex in test

There is an other issue found with this test: https://bugs.openjdk.org/browse/JDK-8342862

Question: why we run this test on not APX machines?
The original PR was "for testing APX encoding of extended gpr instructions".

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PR Comment: https://git.openjdk.org/jdk/pull/21644#issuecomment-2430583397
PR Comment: https://git.openjdk.org/jdk/pull/21644#issuecomment-2430584885