
While they're not very useful in single-threaded mode this makes them more useful for building libraries because you don't have to always recompile the standard library to get the desired effect. Additionally it helps us enable tests on CI for these functions, since the instructions will now validate without shared memory (thankfully!).
core::arch
- Rust's core library architecture-specific intrinsics
The core::arch
module implements architecture-dependent intrinsics (e.g. SIMD).
Usage
core::arch
is available as part of libcore
and it is re-exported by
libstd
. Prefer using it via core::arch
or std::arch
than via this crate.
Unstable features are often available in nightly Rust via the
feature(stdsimd)
.
Using core::arch
via this crate requires nightly Rust, and it can (and does)
break often. The only cases in which you should consider using it via this crate
are:
-
if you need to re-compile
core::arch
yourself, e.g., with particular target-features enabled that are not enabled forlibcore
/libstd
. Note: if you need to re-compile it for a non-standard target, please prefer usingxargo
and re-compilinglibcore
/libstd
as appropriate instead of using this crate. -
using some features that might not be available even behind unstable Rust features. We try to keep these to a minimum. If you need to use some of these features, please open an issue so that we can expose them in nightly Rust and you can use them from there.
Documentation
- Documentation - i686
- Documentation - x86_64
- Documentation - arm
- Documentation - aarch64
- Documentation - powerpc
- Documentation - powerpc64
- How to get started
- How to help implement intrinsics
License
core_arch
is primarily distributed under the terms of both the MIT license and
the Apache License (Version 2.0), with portions covered by various BSD-like
licenses.
See LICENSE-APACHE, and LICENSE-MIT for details.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in core_arch
by you, as defined in the Apache-2.0 license,
shall be dual licensed as above, without any additional terms or conditions.