e8881b2cc0
This PR makes use of the new implicit-conversion feature of the ISLE DSL that was introduced in #3807 in order to make the lowering rules significantly simpler and more concise. The basic idea is to eliminate the repetitive and mechanical use of terms that convert from one type to another when there is only one real way to do the conversion -- for example, to go from a `WritableReg` to a `Reg`, the only sensible way is to use `writable_reg_to_reg`. This PR generally takes any term of the form "A_to_B" and makes it an automatic conversion, as well as some others that are similar in spirit. The notable exception to the pure-value-convsion category is the `put_in_reg` family of operations, which actually do have side-effects. However, as noted in the doc additions in #3807, this is fine as long as the side-effects are idempotent. And on balance, making `put_in_reg` automatic is a significant clarity win -- together with other operand converters, it enables rules like: ``` ;; Add two registers. (rule (lower (has_type (fits_in_64 ty) (iadd x y))) (add ty x y)) ``` There may be other converters that we could define to make the rules even simpler; we can make such improvements as we think of them, but this should be a good start!
wasmtime
A standalone runtime for WebAssembly
A Bytecode Alliance project
Guide | Contributing | Website | Chat
Installation
The Wasmtime CLI can be installed on Linux and macOS with a small install script:
$ curl https://wasmtime.dev/install.sh -sSf | bash
Windows or otherwise interested users can download installers and binaries directly from the GitHub Releases page.
Example
If you've got the Rust compiler installed then you can take some Rust source code:
fn main() {
println!("Hello, world!");
}
and compile/run it with:
$ rustup target add wasm32-wasi
$ rustc hello.rs --target wasm32-wasi
$ wasmtime hello.wasm
Hello, world!
Features
-
Lightweight. Wasmtime is a standalone runtime for WebAssembly that scales with your needs. It fits on tiny chips as well as makes use of huge servers. Wasmtime can be embedded into almost any application too.
-
Fast. Wasmtime is built on the optimizing Cranelift code generator to quickly generate high-quality machine code at runtime.
-
Configurable. Whether you need to precompile your wasm ahead of time, or interpret it at runtime, Wasmtime has you covered for all your wasm-executing needs.
-
WASI. Wasmtime supports a rich set of APIs for interacting with the host environment through the WASI standard.
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Standards Compliant. Wasmtime passes the official WebAssembly test suite, implements the official C API of wasm, and implements future proposals to WebAssembly as well. Wasmtime developers are intimately engaged with the WebAssembly standards process all along the way too.
Language Support
You can use Wasmtime from a variety of different languages through embeddings of the implementation:
- Rust - the
wasmtimecrate - C - the
wasm.h,wasi.h, andwasmtime.hheaders or usewasmtimeConan package - C++ - the
wasmtime-cpprepository or usewasmtime-cppConan package - Python - the
wasmtimePyPI package - .NET - the
WasmtimeNuGet package - Go - the
wasmtime-gorepository
Documentation
📚 Read the Wasmtime guide here! 📚
The wasmtime guide is the best starting point to learn about what Wasmtime can do for you or help answer your questions about Wasmtime. If you're curious in contributing to Wasmtime, it can also help you do that!
It's Wasmtime.