# SIMD A SIMD vector of a fixed number of elements. ``` protocol SIMD : CustomStringConvertible, Decodable, Encodable, ExpressibleByArrayLiteral, Hashable, SIMDStorage ``` ## Relationships ### Inherits From [`ExpressibleByArrayLiteral`](/documentation/Swift/ExpressibleByArrayLiteral) [`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible) [`Decodable`](/documentation/Swift/Decodable) [`Equatable`](/documentation/Swift/Equatable) [`Encodable`](/documentation/Swift/Encodable) [`SIMDStorage`](/documentation/Swift/SIMDStorage) [`Hashable`](/documentation/Swift/Hashable) ### Conforming Types [`SIMD8`](/documentation/Swift/SIMD8) [`SIMDMask`](/documentation/Swift/SIMDMask) [`SIMD64`](/documentation/Swift/SIMD64) [`SIMD3`](/documentation/Swift/SIMD3) [`SIMD2`](/documentation/Swift/SIMD2) [`SIMD32`](/documentation/Swift/SIMD32) [`SIMD4`](/documentation/Swift/SIMD4) [`SIMD16`](/documentation/Swift/SIMD16) --- 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)