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Empowering everyone to build reliable and efficient software. Gabriel's commits. https://www.rust-lang.org/
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Matthias Krüger ff55f2af75
Rollup merge of #139440 - a4lg:riscv-feature-addition-batch-2, r=Amanieu 
rustc_target: RISC-V: feature addition batch 2

Of ratified RISC-V extensions, this commit adds ones satisfying following criteria:

1.  Either discoverable through a `riscv_hwprobe` system call on Linux 6.14
    or should be very helpful even on basic needs (the `B` extension),
2.  Does not disrupt current Rust's feature handling mechanism and
3.  Not too OS-dependent (the `Supm` extension)

Due to 2., the author excluded `Zcf` (RV32 only) and `Zcd` from the list despite that they are discoverable from Linux 6.14.

Due to 3., the author excluded the `Supm` extension on the PR version 2.

This is based on the specification:
*   [The latest ratified ISA Manuals (version 20240411)](16154769/RISC-V+Technical+Specifications)

Linux Definition: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/riscv/include/uapi/asm/hwprobe.h

LLVM Definitions:

*   [`B`](https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L507-L510)
*   [`Zca`](https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L395-L398)
*   [`Zcb`](https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L407-L410)
*   [`Zcmop`](https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L460-L463)
*   [`Zfa`](https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L335-L338)
*   [`Zicboz`](https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L89-L92)
*   [`Zicond`](https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L125-L128)
*   [`Zihintntl`](https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L148-L151)
*   [`Zimop`](https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L161-L162)
*   [`Ztso`](https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/Target/RISCV/RISCVFeatures.td#L214-L217)

The author also adds required implication: `C` implies `Zca`.

Android RISC-V target is also updated to include the `B` extension (this is just a shorthand combination of `Zba`, `Zbb` and `Zbs` extensions but possibly simplifies `target_feature` handling).

# History

## Version 1 → 2

*   Remove the `Supm` extension from the Rust target features (thanks, `@Amanieu).`

--------

Related:
*   #44839
    (`riscv_target_feature`)
*   #138823
    (my previous batch)
*   #132618
    (stabilization of the `Zfa` extension is blocked by this)

`@rustbot` r? `@Amanieu`
`@rustbot` label +T-compiler +O-riscv +A-target-feature
2025-04-17 00:16:21 +02:00
.github Use rust-cache to speed-up citool compilation 2025-04-15 10:04:25 +02:00
compiler Rollup merge of #139440 - a4lg:riscv-feature-addition-batch-2, r=Amanieu 2025-04-17 00:16:21 +02:00
library Update stdarch submodule 2025-04-16 14:52:08 +02:00
LICENSES Synchronize Unicode license text from unicode.org 2024-11-20 00:54:12 -08:00
src Rollup merge of #135340 - obeis:explicit-extern-abis, r=traviscross,nadrieril 2025-04-17 00:16:20 +02:00
tests Rollup merge of #139440 - a4lg:riscv-feature-addition-batch-2, r=Amanieu 2025-04-17 00:16:21 +02:00
.clang-format Add .clang-format 2024-06-26 05:56:00 +08:00
.editorconfig Don't apply editorconfig to llvm 2025-02-09 16:21:14 -05:00
.git-blame-ignore-revs Git blame ignore recent formatting commit 2025-02-09 12:00:23 -08:00
.gitattributes Mark .pp files as Rust 2025-03-29 12:39:06 +01:00
.gitignore change config.toml to bootstrap.toml for bootstrap module 2025-03-17 12:56:41 +05:30
.gitmodules move autodiff from EnzymeAD/Enzyme to our rust-lang/Enzyme soft-fork 2025-04-01 17:17:39 -04:00
.ignore change config.toml to bootstrap.toml for bootstrap module 2025-03-17 12:56:41 +05:30
.mailmap Add myself to mailmap 2025-04-14 14:27:15 +01:00
bootstrap.example.toml create new option build.compiletest-use-stage0-libtest 2025-04-05 14:22:08 +03:00
Cargo.lock Rollup merge of #139813 - RalfJung:miri-sync, r=RalfJung 2025-04-14 21:55:41 +02:00
Cargo.toml Alphabetize the root workspace members 2025-03-13 12:21:14 -07:00
CODE_OF_CONDUCT.md
configure Ensure ./configure works when configure.py path contains spaces 2024-02-16 18:57:22 +00:00
CONTRIBUTING.md Fix some typos 2025-03-04 16:05:32 +08:00
COPYRIGHT Update copyright year 2025-03-13 02:01:16 +05:00
INSTALL.md change config.toml to bootstrap.toml for bootstrap module 2025-03-17 12:56:41 +05:30
LICENSE-APACHE Update copyright year 2025-03-13 02:01:16 +05:00
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LICENSE-MIT Update copyright year 2025-03-13 02:01:16 +05:00
README.md Update Rust Foundation links in Readme 2025-03-16 19:03:40 -07:00
RELEASES.md Apply suggestions from code review 2025-03-30 15:45:44 -07:00
REUSE.toml change config.toml to bootstrap.toml for bootstrap module 2025-03-17 12:56:41 +05:30
rust-bors.toml Increase timeout for new bors bot 2024-03-13 08:31:07 +01:00
rustfmt.toml rustfmt does not support use closures yet 2025-04-07 16:53:11 -03:00
triagebot.toml Rollup merge of #139687 - spastorino:add-spastorino-to-vacation, r=Urgau 2025-04-11 21:21:02 +02:00
x Look for python3 first on MacOS, not py 2025-02-13 10:24:54 -05:00
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

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.