# vS256Neg(_:_:) Signed 256-bit negation. ``` func vS256Neg(_ a: UnsafePointer, _ result: UnsafeMutablePointer) ``` ## Parameters `a` The value to negate. `result` Returns the negated value through the result parameter. ## Discussion --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)