9dbb8c25c5
Add support for implicit type conversions to ISLE. This feature allows the DSL user to register to the compiler that a particular term (used as a constructor or extractor) converts from one type to another. The compiler will then *automatically* insert this term whenever a type mismatch involving that specific pair of types occurs. This significantly cleans up many uses of the ISLE DSL. For example, when defining the compiler backends, we often have newtypes like `Gpr` around `Reg` (signifying a particular type of register); we can define a conversion from Gpr to Reg automatically. Conversions can also have side-effects, as long as these side-effects are idempotent. For example, `put_value_in_reg` in a compiler backend has the effect of marking the value as used, causing codegen to produce it, and assigns a register to the value; but multiple invocations of this will return the same register for the same value. Thus it is safe to use it as an implicit conversion that may be invoked multiple times. This is documented in the ISLE-Cranelift integration document. This PR also adds some testing infrastructure to the ISLE compiler, checking that "pass" tests pass through the DSL compiler, "fail" tests do not, and "link" tests are able to generate code and link that code with corresponding Rust code.
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.
-
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.