openwall / openwall/john

Add AArch64 SVE, SVE2 to simd-intrinsics

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enhancement
Dominant language
C
Stars
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Forks
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PR merge metrics
No merged PRs in 30d

Description

These are new Arm instruction set SIMD extensions, beyond NEON/ASIMD. Besides wider vectors, particularly relevant new instructions are 3-input XOR (EOR3), AND-NOT-XOR (BCAX), and XOR-rotate and rotate-XOR (XAR, RAX1).

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the existing simd-intrinsics support for NEON/ASIMD and understanding how instruction-set extensions are represented. Determine how AArch64 SVE and SVE2, including EOR3, BCAX, XAR, and RAX1, fit that structure; done means the requested extensions and instructions are supported.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
performance
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

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