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4.3 KiB
4.3 KiB
WebAssembly Proposals Support
The following table summarizes Wasmtime's support for WebAssembly proposals as
well as the command line flag and wasmtime::Config method you can
use to enable or disable support for a proposal.
If a proposal is not listed, then it is not supported by Wasmtime.
Wasmtime will never enable a proposal by default unless it has reached phase 4 of the WebAssembly standardizations process and its implementation in Wasmtime has been thoroughly vetted.
| WebAssembly Proposal | Supported in Wasmtime? | Command Line Name | Config Method |
|---|---|---|---|
| Import and Export Mutable Globals | Yes. Always enabled. |
(none) | (none) |
| Sign-Extension Operations | Yes. Always enabled. |
(none) | (none) |
| Non-Trapping Float-to-Int Conversions | Yes. Always enabled. |
(none) | (none) |
| Multi-Value | Yes. Enabled by default. |
multi-value |
wasm_multi_value |
| Bulk Memory Operations | Yes. Enabled by default. |
bulk-memory |
wasm_bulk_memory |
| Reference Types | Yes. Enabled by default. |
reference-types |
wasm_reference_types |
| Fixed-Width SIMD | Yes. Enabled by default. |
simd |
wasm_simd |
| Threads and Atomics | In progress. | threads |
wasm_threads |
| Multi-Memory | Yes. | multi-memory |
wasm_multi_memory |
| Component Model | In progress. | component-model |
wasm_component_model |
| Memory64 | Yes. | memory64 |
wasm_memory64 |
The "Command Line Name" refers to the --wasm-features CLI argument of the
wasmtime executable and the name which must be passed to enable it.