Bug 238009

Summary: [RISC-V] Support the bitmanip extensions
Product: WebKit Reporter: Zan Dobersek <zan>
Component: New BugsAssignee: Nobody <webkit-unassigned>
Status: NEW    
Severity: Normal CC: webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on:    
Bug Blocks: 237775    

Zan Dobersek
Reported 2022-03-17 01:23:48 PDT
The bitmanip extensions (Zba, Zbb, Zbc, Zbs) have been ratified some months ago, and would be very useful in how we generate instructions for certain operations. These would have to be detected at runtime. Once indicated as supported, we could generate much simpler instructions instead of the current overly-verbose implementations.
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Zan Dobersek
Comment 1 2022-03-17 01:37:08 PDT
Bitmanip (Zba, Zbb, Zbc, Zbs) spec: https://github.com/riscv/riscv-bitmanip/releases/download/1.0.0/bitmanip-1.0.0-38-g865e7a7.pdf
Radar WebKit Bug Importer
Comment 2 2022-03-24 01:24:15 PDT
<rdar://problem/90753636>
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