About

Add HWPROBE based discovery for various Zv* extensions which are not implied by V-extension:

• Zvl32b
• Zvl64b
• Zvl128b
• Zvl256b
• Zvl512b
• Zvl1024b

The V-extension implies following features so these does not require separate discovery:

• Zvl128b
• EEW of 8, 16, and 32, and 64
• Vector configuration instructions (vsetvli/vsetivli/vsetvl)
• Vector load and store instructions
• Vector integer instructions
• Vector fixed-point arithmetic instructions
• Vector integer single-width and widening reduction operations
• Vector mask instructions
• Vector permutation instructions

Refer, Chapter18 of https://github.com/riscv/riscv-v-spec/releases/tag/v1.0

Status

Updates

25 May 2023

• Project reported as priority for 2H23

16 Oct 2023

• Nothing required to be done for this item because user-space can discover supported vector length from CSR WARL fields.