Add a new wide-arithmetic feature for WebAssembly
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Some changes occurred in tests/ui/check-cfg cc @Urgau |
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☔ The latest upstream changes (presumably #131900) made this pull request unmergeable. Please resolve the merge conflicts. |
This commit adds a new rustc target feature named `wide-arithmetic` for WebAssembly targets. This corresponds to the [wide-arithmetic] proposal for WebAssembly which adds new instructions catered towards accelerating integer arithmetic larger than 64-bits. This proposal to WebAssembly is not standard yet so this new feature is flagged as an unstable target feature. Additionally Rust's LLVM version doesn't support this new feature yet since support will first be added in LLVM 20, so the feature filtering logic for LLVM is updated to handle this. I'll also note that I'm not currently planning to add wasm-specific intrinsics to `std::arch::wasm32` at this time. The currently proposed instructions are all accessible through `i128` or `u128`-based operations which Rust already supports, so intrinsic shouldn't be necessary to get access to these new instructions. [wide-arithmetic]: https://github.com/WebAssembly/wide-arithmetic
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ping @estebank, I'm happy to re-roll review here or otherwise seek out a reviewer if you're busy though |
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I'll take a look. |
jieyouxu
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@bors r+ rollup |
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…iaskrgr Rollup of 5 pull requests Successful merges: - rust-lang#131261 (Stabilize `UnsafeCell::from_mut`) - rust-lang#131405 (bootstrap/codegen_ssa: ship llvm-strip and use it for -Cstrip) - rust-lang#132077 (Add a new `wide-arithmetic` feature for WebAssembly) - rust-lang#132562 (Remove the `wasm32-wasi` target from rustc) - rust-lang#132660 (Remove unused errs.rs file) Failed merges: - rust-lang#131721 (Add new unstable feature `const_eq_ignore_ascii_case`) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#132077 - alexcrichton:wide-arithmetic, r=jieyouxu Add a new `wide-arithmetic` feature for WebAssembly This commit adds a new rustc target feature named `wide-arithmetic` for WebAssembly targets. This corresponds to the [wide-arithmetic] proposal for WebAssembly which adds new instructions catered towards accelerating integer arithmetic larger than 64-bits. This proposal to WebAssembly is not standard yet so this new feature is flagged as an unstable target feature. Additionally Rust's LLVM version doesn't support this new feature yet since support will first be added in LLVM 20, so the feature filtering logic for LLVM is updated to handle this. I'll also note that I'm not currently planning to add wasm-specific intrinsics to `std::arch::wasm32` at this time. The currently proposed instructions are all accessible through `i128` or `u128`-based operations which Rust already supports, so intrinsic shouldn't be necessary to get access to these new instructions. [wide-arithmetic]: https://github.com/WebAssembly/wide-arithmetic
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This commit adds a new rustc target feature named
wide-arithmeticfor WebAssembly targets. This corresponds to the wide-arithmetic proposal for WebAssembly which adds new instructions catered towards accelerating integer arithmetic larger than 64-bits. This proposal to WebAssembly is not standard yet so this new feature is flagged as an unstable target feature. Additionally Rust's LLVM version doesn't support this new feature yet since support will first be added in LLVM 20, so the feature filtering logic for LLVM is updated to handle this.I'll also note that I'm not currently planning to add wasm-specific intrinsics to
std::arch::wasm32at this time. The currently proposed instructions are all accessible throughi128oru128-based operations which Rust already supports, so intrinsic shouldn't be necessary to get access to these new instructions.