Sign-extension operator instructions extend the width of 8-bit, 16-bit, and 32-bit values to 32-bit and 64-bit values.

Learning resources on MDN

No MDN documentation found. You can search for the feature on MDN. If you believe that MDN has no documentation about this feature, you can open an issue on MDN's GitHub repository.

Browser support (view on caniuse.com)

• Chrome 69 Released on 2018-09-04
• Chrome Android 69 Released on 2018-09-04
• Edge 18 Released on 2018-10-02
• Firefox 62 Released on 2018-09-05
• Firefox for Android 62 Released on 2018-09-05
• Safari 14.1 Released on 2021-04-26
• Safari on iOS 14.5 Released on 2021-04-26

View web-platform-tests results for this feature - View the feature source file - Edit the feature - Report an issue about this feature