user0/rust
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
my rust fork https://www.rust-lang.org
317584 commits 10 branches 154 tags 1.3 GiB
Find a file
Jonathan Brouwer d7c812cb57
Rollup merge of #146900 - taiki-e:avr-target-feature, r=workingjubilee 
Add avr_target_feature

This adds the following unstable target features (tracking issue: https://github.com/rust-lang/rust/issues/146889):

- The following two are particularly important for properly supporting inline assembly:
  - `tinyencoding`: AVR has devices that reduce the number of registers, similar to RISC-V's RV32E. This feature is necessary to support inline assembly in such devices. (see also https://github.com/rust-lang/rust/pull/146901)
  - `lowbytefirst`: AVR's memory access is per 8-bit, and when writing 16-bit ports, the bytes must be written in a specific order. This order depends on devices, making this feature necessary to write proper inline assembly for such use cases. (see also 2a528760bf)
- The followings help recognizing whether specific instructions are available:
  - `addsubiw`
  - `break`
  - `eijmpcall`
  - `elpm`
  - `elpmx`
  - `ijmpcall`
  - `jmpcall`
  - `lpm`
  - `lpmx`
  - `movw`
  - `mul`
  - `rmw`
  - `spm`
  - `spmx`

  Of these, all except `addsubiw`, `break`, `ijmpcall`, `lpm`, `rmw`, `spm`, and `spmx` have [corresponding conditional codes in avr-libc](https://github.com/search?q=repo%3Aavrdudes%2Favr-libc+%2F__AVR_HAVE_%2F&type=code&p=1). LLVM also has `des` feature, but I excluded it from this PR because [DES](https://en.wikipedia.org/wiki/Data_Encryption_Standard) is insecure.

- Report future-incompatible warning (https://github.com/rust-lang/rust/issues/116344) for -C target-feature=-sram and -C target-cpu=<device_without_sram> cases because SRAM is minimum requirement for non-assembly language in both avr-gcc and LLVM.
  - See https://github.com/rust-lang/rust/pull/146900#issuecomment-3323558005 for details.

LLVM also has `smallstack`, `wrappingrjmp`, and `memmappedregs` features, but I skipped them because they didn't seem to belong to either of the above categories, but I might have missed something.

(The feature names are match with [definitions in LLVM](https://github.com/llvm/llvm-project/blob/llvmorg-21.1.0/llvm/lib/Target/AVR/AVRDevices.td).)

cc @Patryk27 @Rahix
r? workingjubilee

@rustbot label +O-AVR +A-target-feature
2026-02-07 09:41:06 +01:00
.github Use DEVELOPER_DIR instead of a custom xcode-select script 2026-02-03 20:14:52 +01:00
compiler Rollup merge of #146900 - taiki-e:avr-target-feature, r=workingjubilee 2026-02-07 09:41:06 +01:00
library Stabilize const ControlFlow predicates 2026-02-07 00:33:52 +04:00
LICENSES Synchronize Unicode license text from unicode.org 2024-11-20 00:54:12 -08:00
src Rollup merge of #146900 - taiki-e:avr-target-feature, r=workingjubilee 2026-02-07 09:41:06 +01:00
tests Rollup merge of #146900 - taiki-e:avr-target-feature, r=workingjubilee 2026-02-07 09:41:06 +01:00
.clang-format Add .clang-format 2024-06-26 05:56:00 +08:00
.editorconfig editorconfig: don't use nonexistant syntax 2025-08-24 10:37:19 -05:00
.git-blame-ignore-revs git: ignore 60600a6fa4 for blame purposes 2025-04-17 11:50:24 +08:00
.gitattributes Mark .pp files as Rust 2025-03-29 12:39:06 +01:00
.gitignore ignore build-rust-analyzer even if it's a symlink 2025-11-12 16:41:41 +01:00
.gitmodules Update to LLVM 22 2026-01-27 12:09:39 +01:00
.ignore change config.toml to bootstrap.toml for bootstrap module 2025-03-17 12:56:41 +05:30
.mailmap Add temporary new bors e-mail address to the mailmap 2026-01-14 18:01:50 +01:00
bootstrap.example.toml Change how we build offload as a single Step 2025-12-22 23:50:11 +01:00
Cargo.lock Rollup merge of #152186 - GuillaumeGomez:inline-diag-rustc_const_eval, r=JonathanBrouwer 2026-02-07 01:18:53 +01:00
Cargo.toml Bump Clippy version -> 0.1.95 2026-01-22 16:55:20 +01:00
CODE_OF_CONDUCT.md Remove the code of conduct; instead link https://www.rust-lang.org/conduct.html 2019-10-05 22:55:19 +02:00
configure Ensure ./configure works when configure.py path contains spaces 2024-02-16 18:57:22 +00:00
CONTRIBUTING.md chore: remove dead links 2025-09-22 10:15:50 +01:00
COPYRIGHT Merge commit '500e0ff187' into clippy-subtree-update 2026-01-09 10:37:00 +01:00
INSTALL.md Rename rust.use-lld to rust.bootstrap-override-lld in INSTALL.md 2026-01-14 14:20:45 -06:00
LICENSE-APACHE Merge commit '500e0ff187' into clippy-subtree-update 2026-01-09 10:37:00 +01:00
license-metadata.json Update license metadata 2025-02-15 16:48:37 +01:00
LICENSE-MIT Merge commit '500e0ff187' into clippy-subtree-update 2026-01-09 10:37:00 +01:00
package.json Update browser-ui-test version to 0.23.3 2026-01-27 21:14:25 +01:00
README.md Merge commit '500e0ff187' into clippy-subtree-update 2026-01-09 10:37:00 +01:00
RELEASES.md relnotes: fix 1.93's as_mut_array methods 2026-01-23 15:54:13 -08:00
REUSE.toml Omit standard copyright notice 2026-01-26 17:31:34 +00:00
rust-bors.toml Add S-blocked to labels_blocking_approval 2026-01-19 16:01:16 +01:00
rustfmt.toml Rename tests/rustdoc into tests/rustdoc-html 2026-01-07 14:23:30 +01:00
triagebot.toml Rollup merge of #152222 - TaKO8Ki:add-tako8ki-to-triagebot, r=davidtwco 2026-02-06 15:33:41 +01:00
typos.toml Fix some typos of "similarity" 2026-01-29 23:40:37 +11:00
x Add uv to the list of possible python runners 2026-02-02 13:01:40 +01:00
x.ps1 use & instead of start-process in x.ps1 2023-12-09 09:46:16 -05:00
x.py Reformat Python code with ruff 2024-12-04 23:03:44 +01:00
yarn.lock Update npm package, remove another unused one, and fix some typing errors that started popping when we moved to yarn 2025-11-17 10:58:18 +02:00

README.md

This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.

Why Rust?

  • Performance: Fast and memory-efficient, suitable for critical services, embedded devices, and easily integrated with other languages.

  • Reliability: Our rich type system and ownership model ensure memory and thread safety, reducing bugs at compile-time.

  • Productivity: Comprehensive documentation, a compiler committed to providing great diagnostics, and advanced tooling including package manager and build tool (Cargo), auto-formatter (rustfmt), linter (Clippy) and editor support (rust-analyzer).

Quick Start

Read "Installation" from The Book.

Installing from Source

If you really want to install from source (though this is not recommended), see INSTALL.md.

Getting Help

See https://www.rust-lang.org/community for a list of chat platforms and forums.

Contributing

See CONTRIBUTING.md.

License

Rust 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, LICENSE-MIT, and COPYRIGHT for details.

Trademark

The Rust Foundation owns and protects the Rust and Cargo trademarks and logos (the "Rust Trademarks").

If you want to use these names or brands, please read the Rust language trademark policy.

Third-party logos may be subject to third-party copyrights and trademarks. See Licenses for details.