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Standardize phase

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Sign Extension Operators Proposal for WebAssembly

This repository is a clone of It is meant for discussion, prototype specification and implementation of a proposal to add sign-extension operators to WebAssembly.

See the overview for a summary of the proposal.

A formatted version of the spec, including this propsal, is available here:

Original README from upstream repository follows...


This repository holds the sources for the WebAssembly draft specification (to seed a future WebAssembly Working Group), a reference implementation, and the official testsuite.

A formatted version of the spec is available here:,

Participation is welcome. Discussions about new features, significant semantic changes, or any specification change likely to generate substantial discussion should take place in the WebAssembly design repository first, so that this spec repository can remain focused. And please follow the guidelines for contributing.

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