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The immediate here encodes both the rounding mode (in the low bits) and the scale (in the high bits). Make sure the scale is non-zero.
Fix CI after LLVM upgrade
Add testing for Arm64EC Windows
wasm: use `{read, write}_unaligned` methods
…g-add-sub
use `simd_saturating_{add, sub}` on neon
`s390x` llvm 21 improvements
It's historically been flaky and is no longer needed now that std_detect has been moved out of this repository.
Remove FreeBSD CI
use `llvm.roundeven` on arm
use `qemu-user` instead of `qemu-user-static` for loongarch CI
They don't need full "Zbc" extension but only its subset: the "Zbkc" extension. Since the compiler implies `zbkc` from `zbc`, it's safe to use `#[target_feature(enable = "zbkc")]`.
…ments RISC-V: Lower requirements of `clmul` and `clmulh`
This commit performs various improvements (better register allocation,
less register clobbering on the worst case and better readability) of
RISC-V inline assembly use cases.
Note that it does not change the `p` module (which defines the "P"
extension draft instructions but very likely to change).
1. Use `lateout` as possible.
Unlike `out(reg)` and `in(reg)` pair, `lateout(reg)` and `in(reg)`
can share the same register because they state that the late-output
register is written after all the reads are performed.
It can improve register allocation.
2. Add `preserves_flags` option as possible.
While RISC-V doesn't have _regular_ condition codes, RISC-V inline
assembly in the Rust language assumes that some registers
(mainly vector state registers) may be overwritten by default.
By adding `preserves_flags` to the intrinsics corresponding
instructions without overwriting them, it can minimize register
clobbering on the worst case.
3. Use trailing semicolon.
As `asm!` declares an action and it doesn't return a value by
itself, it would be better to have trailing semicolon to denote that
an `asm!` call is effectively a statement.
4. Make most of `asm!` calls multi-lined.
`rustfmt` makes some simple (yet long) `asm!` calls multi-lined but
it does not perform formatting of complex `asm!` calls with inputs
and/or outputs. To keep consistency, it makes most of the `asm!`
calls multi-lined.
Remove big-endian swizzles from `vreinterpret`
…improvements RISC-V: Improvements of inline assembly uses
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cc @Amanieu, @folkertdev, @sayantn |
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Technically, this PR is exactly the same as #146669 (but closed and reopened for additional safety). |
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CI (even PR CI) is always executed on the latest master branch :) Looks fine. @bors r+ |
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stdarch subtree update Subtree update of `stdarch` to [rust-lang/stdarch@9f12c1a](rust-lang/stdarch@9f12c1a). Created using https://github.com/rust-lang/josh-sync. r? `@Kobzol`
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Rollup of 8 pull requests Successful merges: - #146229 (Automatically switch to lto-fat when flag RUSTFLAGS="- Zautodiff=Enable" is set) - #146615 (rustc_codegen_llvm: Feature Conversion Tidying) - #146638 (`rustc_next_trait_solver`: canonical out of `EvalCtxt`) - #146663 (Allow windows resource compiler to be overridden) - #146691 (std: Fix WASI implementation of `remove_dir_all`) - #146709 (stdarch subtree update) - #146731 (test: Use SVG for terminal url test) - #146738 (Fix tidy spellchecking on Windows) r? `@ghost` `@rustbot` modify labels: rollup
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stdarch subtree update Subtree update of `stdarch` to [rust-lang/stdarch@9f12c1a](rust-lang/stdarch@9f12c1a). Created using https://github.com/rust-lang/josh-sync. r? ``@Kobzol``
This was referenced Sep 19, 2025
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Rollup of 10 pull requests Successful merges: - #146229 (Automatically switch to lto-fat when flag RUSTFLAGS="- Zautodiff=Enable" is set) - #146484 (rustdoc-search: JavaScript optimization based on Firefox Profiler output) - #146541 (std: simplify host lookup) - #146615 (rustc_codegen_llvm: Feature Conversion Tidying) - #146638 (`rustc_next_trait_solver`: canonical out of `EvalCtxt`) - #146663 (Allow windows resource compiler to be overridden) - #146691 (std: Fix WASI implementation of `remove_dir_all`) - #146709 (stdarch subtree update) - #146738 (Fix tidy spellchecking on Windows) - #146740 (miri subtree update) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of #146709 - a4lg:stdarch-sync-20250917, r=Kobzol stdarch subtree update Subtree update of `stdarch` to [rust-lang/stdarch@9f12c1a](rust-lang/stdarch@9f12c1a). Created using https://github.com/rust-lang/josh-sync. r? ```@Kobzol```
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Rollup of 10 pull requests Successful merges: - rust-lang/rust#146229 (Automatically switch to lto-fat when flag RUSTFLAGS="- Zautodiff=Enable" is set) - rust-lang/rust#146484 (rustdoc-search: JavaScript optimization based on Firefox Profiler output) - rust-lang/rust#146541 (std: simplify host lookup) - rust-lang/rust#146615 (rustc_codegen_llvm: Feature Conversion Tidying) - rust-lang/rust#146638 (`rustc_next_trait_solver`: canonical out of `EvalCtxt`) - rust-lang/rust#146663 (Allow windows resource compiler to be overridden) - rust-lang/rust#146691 (std: Fix WASI implementation of `remove_dir_all`) - rust-lang/rust#146709 (stdarch subtree update) - rust-lang/rust#146738 (Fix tidy spellchecking on Windows) - rust-lang/rust#146740 (miri subtree update) r? `@ghost` `@rustbot` modify labels: rollup
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stdarch subtree update Subtree update of `stdarch` to [rust-lang/stdarch@9f12c1a](rust-lang/stdarch@9f12c1a). Created using https://github.com/rust-lang/josh-sync. r? ```@Kobzol```
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Rollup of 10 pull requests Successful merges: - rust-lang#146229 (Automatically switch to lto-fat when flag RUSTFLAGS="- Zautodiff=Enable" is set) - rust-lang#146484 (rustdoc-search: JavaScript optimization based on Firefox Profiler output) - rust-lang#146541 (std: simplify host lookup) - rust-lang#146615 (rustc_codegen_llvm: Feature Conversion Tidying) - rust-lang#146638 (`rustc_next_trait_solver`: canonical out of `EvalCtxt`) - rust-lang#146663 (Allow windows resource compiler to be overridden) - rust-lang#146691 (std: Fix WASI implementation of `remove_dir_all`) - rust-lang#146709 (stdarch subtree update) - rust-lang#146738 (Fix tidy spellchecking on Windows) - rust-lang#146740 (miri subtree update) r? `@ghost` `@rustbot` modify labels: rollup
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stdarch subtree update Subtree update of `stdarch` to [rust-lang/stdarch@9f12c1a](rust-lang/stdarch@9f12c1a). Created using https://github.com/rust-lang/josh-sync. r? ```@Kobzol```
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Rollup of 10 pull requests Successful merges: - rust-lang/rust#146229 (Automatically switch to lto-fat when flag RUSTFLAGS="- Zautodiff=Enable" is set) - rust-lang/rust#146484 (rustdoc-search: JavaScript optimization based on Firefox Profiler output) - rust-lang/rust#146541 (std: simplify host lookup) - rust-lang/rust#146615 (rustc_codegen_llvm: Feature Conversion Tidying) - rust-lang/rust#146638 (`rustc_next_trait_solver`: canonical out of `EvalCtxt`) - rust-lang/rust#146663 (Allow windows resource compiler to be overridden) - rust-lang/rust#146691 (std: Fix WASI implementation of `remove_dir_all`) - rust-lang/rust#146709 (stdarch subtree update) - rust-lang/rust#146738 (Fix tidy spellchecking on Windows) - rust-lang/rust#146740 (miri subtree update) r? `@ghost` `@rustbot` modify labels: rollup
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Subtree update of
stdarchto rust-lang/stdarch@9f12c1a.Created using https://github.com/rust-lang/josh-sync.
r? @Kobzol