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    

Description Zan Dobersek 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.
Comment 1 Zan Dobersek 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
Comment 2 Radar WebKit Bug Importer 2022-03-24 01:24:15 PDT 
<rdar://problem/90753636>