rust-lang / rust-lang/rust

How should we handle dynamic vector ABIs?

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A-ABI A-SIMD C-discussion E-needs-design O-AArch64 O-riscv T-compiler
Dominant language
Rust
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Description

The primary unresolved question of https://github.com/rust-lang/rust/issues/131800 I would say is this edge-case. Opening this marker issue for now, I will explain a bit later but basically: we understand most of the factors here but we need to account for what we actually want to do.

AArch64

RISCV

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Research direction

Start by reading the primary unresolved issue, rust-lang/rust#131800, then review the AArch64 scalable vector and matrix extension references and the linked RISC-V V specification. The issue needs a clear decision on how dynamic vector ABIs should be handled and an agreed scope before implementation can be considered done.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
compilers
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
20/100

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