RFR: 8318219: RISC-V: C2 ExpandBits

[Hamlin Li]

On Tue, 14 Nov 2023 15:37:24 GMT, Hamlin Li <mli at openjdk.org> wrote:

> Hi,
> Can you review the change to add intrinsic for ExpandBits for Long & Integer?
> Thanks!
> 
> related to: https://github.com/openjdk/jdk/pull/16481
> 
> ## Test
> ### jtreg
> test/jdk/java/lang/CompressExpand*.java
> test/hotspot/jtreg/compiler/intrinsics/TestBitShuffleOpers.java
> test/hotspot/jtreg/compiler/intrinsics/
> 
> ### gtest
> test/hotspot/gtest/opto/test_compress_expand_bits.cpp

Seems the C2_MacroAssembler::expand_bits_v and compress_bits_v could be merged, please let me known if you also think so too.

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PR Comment: https://git.openjdk.org/jdk/pull/16658#issuecomment-1812192618