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


Dependency

LK_01_006


Development

NOTNEEDED

URL: NA
Development Timeline

Q3 2023


Upstreaming

NOTNEEDED

URL: NA
Upstream Version

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Contacts

Andy Chiu (SiFive)

Andy Chiu

Updates

  • Project reported as priority for 2H23

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

2 Comments

  1. Andy Chiu

    We (SiFive) are willing to take this item. Should I go update the contact directly?

    1. Anup Patel

      I have added you as contact. You own this page so please keep it up-to-date.