[jdk21u] RFR: 8316743: RISC-V: Change UseVectorizedMismatchIntrinsic option result to warning

[Fei Yang]

On Tue, 3 Oct 2023 07:41:44 GMT, Fei Yang <fyang at openjdk.org> wrote:

> VectorizedMismatch intrinsic is not implemented on linux-riscv platform. Backport this fix to avoid JVM crash when user specified JVM options -XX:+UnlockDiagnosticVMOptions -XX:+UseVectorizedMismatchIntrinsic on the command line. RISC-V only change, risk is low.

GHA is clean. 21u push approval is here.

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PR Comment: https://git.openjdk.org/jdk21u/pull/224#issuecomment-1745975483