# SIMD4 A vector of four scalar values. ``` @frozen struct SIMD4 where Scalar : SIMDScalar ``` ## Relationships ### Conforms To [`Equatable`](/documentation/Swift/Equatable) [`ConvertibleToBytes`](/documentation/Swift/ConvertibleToBytes) [`ConvertibleFromBytes`](/documentation/Swift/ConvertibleFromBytes) [`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible) [`Sendable`](/documentation/Swift/Sendable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Decodable`](/documentation/Swift/Decodable) [`BindableData`](/documentation/RealityKit/BindableData) [`Hashable`](/documentation/Swift/Hashable) [`Escapable`](/documentation/Swift/Escapable) [`AnimatableData`](/documentation/RealityKit/AnimatableData) [`BitwiseCopyable`](/documentation/Swift/BitwiseCopyable) [`SIMD`](/documentation/Swift/SIMD) [`Copyable`](/documentation/Swift/Copyable) [`ExpressibleByArrayLiteral`](/documentation/Swift/ExpressibleByArrayLiteral) [`Encodable`](/documentation/Swift/Encodable) [`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible) [`SIMDStorage`](/documentation/Swift/SIMDStorage) --- 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)