RFR: 8284949: riscv: Add Zero support for the 32-bit RISC-V architecture [v2]

[Feilong Jiang]

On Tue, 19 Apr 2022 11:22:37 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> LGTM
> 
> Cheers, Thomas
> 
> P.S. I assume you did not run the whole gamut of jtreg tests, right? Seems to me there are a number of tests which would need to get adapted for riscv32.

Thanks for the review, Thomas. Currently, we only test jtreg tier1 tests under test/hotspot and test/jdk. I assume it would be enough for adding riscv32 zero support? There are some tests adaptions to be done for riscv32 like [1] [2]. I guess it might be better to fix them in another PR.

[1] https://github.com/openjdk/jdk/blob/72726c41829b33fd2baf5b3604cab49d39489dd2/test/lib/jdk/test/lib/Platform.java#L200-L202 
[2] https://github.com/openjdk/jdk/blob/72726c41829b33fd2baf5b3604cab49d39489dd2/test/lib-test/jdk/test/lib/TestMutuallyExclusivePlatformPredicates.java#L46-L49

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PR: https://git.openjdk.java.net/jdk/pull/8284