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WebAssembly Sign Extension Opcodes

Category

JavaScript

Type

New or changed feature

Status

Enabled by default (Chrome 69)

Intent stage

None

Summary

Add sign extension opcodes to WebAssembly. This makes some code sequences shorter and allows us to provide only zero extended versions of atomic opcodes for threads.

Standards & signals

• Specification: https://github.com/WebAssembly/sign-extension-ops
• Firefox: In development
• Safari: Positive
• Web developers: No signals

Docs: https://github.com/WebAssembly/sign-extension-ops/blob/master/proposals/sign-extension-ops/Overview.md https://github.com/WebAssembly/design/issues/1178

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