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Amanieu d'Antras 7f5fd0955a Disable NEON intrinsics on big-endian ARM 
These are currently broken because the order of elements inside
vectors is reversed on big-endian systems: the ARM ABI requires that
element 0 is located at the highest address of the vector type. However
LLVM intrinsics expect element 0 to be located at the lowest address.

See https://llvm.org/docs/BigEndianNEON.html and `arm_neon.h` in
Clang for more details.

Although this is a breaking change, this is acceptable for 2 reasons:
- big endian ARM targets are only tier 3.
- it is preferable to stop existing code from compiling than to let it
run and produce incorrect results.
2023-10-21 16:29:18 +02:00
..
.github/workflows Remove MIPS from CI 2023-07-29 22:38:57 +01:00
ci Explicitly disable SSE3 for x86_64 2023-10-01 17:57:00 +01:00
crates Disable NEON intrinsics on big-endian ARM 2023-10-21 16:29:18 +02:00
examples Bump rand to 0.8 2023-10-10 14:47:43 +01:00
intrinsics_data Use arm_intrinsics.json in stdarch-verify 2023-05-15 17:34:11 +02:00
.cirrus.yml Fix FreeBSD CI failure 2023-04-12 18:00:04 +01:00
.gitignore Intrinsic test tool to compare neon intrinsics with C (#1170) 2021-09-09 19:16:45 +01:00
.gitmodules Remove ACLE submodule 2023-05-15 17:34:11 +02:00
Cargo.toml Explicitly set the cargo resolver 2023-05-31 20:07:18 +02:00
CONTRIBUTING.md fix target name in contributing.md 2022-08-20 22:19:34 +02:00
LICENSE-APACHE Add license files 2017-09-25 12:43:06 -07:00
LICENSE-MIT Add license files 2017-09-25 12:43:06 -07:00
README.md Use SPDX license format and update packed_simd crate link (#1297) 2022-03-17 10:55:51 +00:00
rustfmt.toml Update the intrinsic checker tool (#1258) 2021-12-04 13:03:30 +00:00
triagebot.toml Remove S-waiting-on-review autolabel (#1360) 2022-11-27 17:22:08 +00:00
vendor.yml Update repo name 2019-07-09 01:37:07 +02:00

README.md

stdarch - Rust's standard library SIMD components

Actions Status

Crates

This repository contains two main crates:

  • core_arch implements core::arch - Rust's core library architecture-specific intrinsics, and

  • std_detect implements std::detect - Rust's standard library run-time CPU feature detection.

The std::simd component now lives in the packed_simd_2 crate.