Tracking Issue for `stdarch_aarch64_rand`

Feature gate: #![feature(stdarch_aarch64_rand)]

This is a tracking issue for the aarch64 random number generation intrinsics, documented at https://arm-software.github.io/acle/main/acle.html#random-number-generation-intrinsics.

Public API

#[target_feature(enable = "rand")]
pub unsafe fn __rndr(value: *mut u64) -> i32 { /* ... */ }

#[target_feature(enable = "rand")]
pub unsafe fn __rndrrs(value: *mut u64) -> i32 { /* ... */ }

Steps / History

(Remember to update the S-tracking-* label when checking boxes.)

• Implementation: https://github.com/rust-lang/stdarch/pull/2050
• Final comment period (FCP)^1
• Stabilization PR

Unresolved Questions

• LLVM uses rand as the name of the target feature, while arm seems to be using rng internally.

Start with the public API and the implementation in stdarch PR 2050. Review the unresolved question about LLVM’s rand target feature name versus Arm’s internal rng name, then check the remaining FCP and stabilization steps. Done means the lifecycle decisions are resolved and the appropriate tracking checklist is updated.