[riscv-port] RFR: 8278994: riscv: RVC support [v3]
Xiaolin Zheng
xlinzheng at openjdk.java.net
Mon Dec 27 02:56:59 UTC 2021
> Hi team,
>
> This patch includes the basic definition of the RVC instruction set and some cleanups. Tested a simple `test/hotspot/jtreg/compiler/` folder on qemu.
>
> Using `<JAVA_HOME>/bin/java -XX:+UnlockExperimentalVMOptions -XX:+UseRVC -XX:+UnlockDiagnosticVMOptions -XX:+PrintAssembly -XX:PrintAssemblyOptions=no-aliases,numeric -XX:+PrintStubCode -XX:-TieredCompilation` could show RVC instructions.
>
> Thanks,
> Xiaolin
Xiaolin Zheng has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains four commits:
- Cover most RVC instructions by using CompressibleRegion to cover minimal functions in C2
- Revise as proposed comments, including
- Fix macros in assembler_riscv_c.hpp
- Remove UncompressibleRegion
- Modify comments
- Change names: C-Ext to RVC
- Enable RVC instructions (based on the basic patch)
- RVC: basic instruction set
-------------
Changes: https://git.openjdk.java.net/riscv-port/pull/34/files
Webrev: https://webrevs.openjdk.java.net/?repo=riscv-port&pr=34&range=02
Stats: 1177 lines in 15 files changed: 1061 ins; 10 del; 106 mod
Patch: https://git.openjdk.java.net/riscv-port/pull/34.diff
Fetch: git fetch https://git.openjdk.java.net/riscv-port pull/34/head:pull/34
PR: https://git.openjdk.java.net/riscv-port/pull/34
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