# simd_ulong8 A vector of eight 64-bit unsigned integer elements. ``` typealias simd_ulong8 = SIMD8 ``` ## Topics ### Functions to Create Eight-Element Vectors From Other Vectors [`simd_make_ulong8(_:)`](/documentation/simd/simd_make_ulong8(_:)-5w0n4) Returns a new vector from the specified two-element vector, and other elements set to zero. [`simd_make_ulong8(_:)`](/documentation/simd/simd_make_ulong8(_:)-5zhz7) Returns a new vector from the specified three-element vector, and other elements set to zero. [`simd_make_ulong8(_:)`](/documentation/simd/simd_make_ulong8(_:)-6hggi) Returns a new vector from the specified four-element vector, and other elements set to zero. [`simd_make_ulong8(_:)`](/documentation/simd/simd_make_ulong8(_:)-6wa2m) Returns a new vector from the specified vector. [`simd_make_ulong8(_:_:)`](/documentation/simd/simd_make_ulong8(_:_:)) Returns a new vector from the specified vectors. [`vector8`](/documentation/simd/vector8-5kkur) Returns a new vector from the specified vectors. [`simd_make_ulong8_undef(_:)`](/documentation/simd/simd_make_ulong8_undef(_:)-9rdt9) Returns a new vector from the specified two-element vector, and other elements undefined. [`simd_make_ulong8_undef(_:)`](/documentation/simd/simd_make_ulong8_undef(_:)-9oge2) Returns a new vector from the specified three-element vector, and other elements undefined. [`simd_make_ulong8_undef(_:)`](/documentation/simd/simd_make_ulong8_undef(_:)-d5pk) Returns a new vector from the specified four-element vector, and other elements undefined. ### Functions to Create Eight-Element Vectors From Scalar Values [`simd_make_ulong8(_:)`](/documentation/simd/simd_make_ulong8(_:)-w5ee) Returns a new vector with the first element set to a scalar value, and other elements set to zero. [`simd_make_ulong8_undef(_:)`](/documentation/simd/simd_make_ulong8_undef(_:)-73woc) Returns a new vector with the first element set to a scalar value, and other elements undefined. ### Functions to Create Eight-Element Vectors From Vectors of Other Types [`simd_ulong`](/documentation/simd/simd_ulong-16dyy) Returns a new vector from the specified vector of 8-bit, signed integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-16o3e) Returns a new vector from the specified vector of 8-bit, unsigned integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-1692y) Returns a new vector from the specified vector of 16-bit, signed integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-16j3u) Returns a new vector from the specified vector of 16-bit, unsigned integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-16fzq) Returns a new vector from the specified vector of 32-bit, signed integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-16px2) Returns a new vector from the specified vector of 32-bit, unsigned integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-16eyu) Returns a new vector from the specified vector of 64-bit, signed integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-16oxy) Returns a new vector from the specified vector of 64-bit, unsigned integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-16n5e) Returns a new vector from the specified vector of 32-bit, floating-point elements. [`simd_ulong`](/documentation/simd/simd_ulong-16mhi) Returns a new vector from the specified vector of 64-bit, floating-point elements. ### Functions to Perform Saturating Conversion From Vectors of Other Types [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-nyps) Returns a new vector from the specified vector of 8-bit, signed integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-o8sg) Returns a new vector from the specified vector of 8-bit, unsigned integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-o3vk) Returns a new vector from the specified vector of 16-bit, signed integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-odsw) Returns a new vector from the specified vector of 16-bit, unsigned integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-nvpk) Returns a new vector from the specified vector of 32-bit, signed integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-o5oo) Returns a new vector from the specified vector of 32-bit, unsigned integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-nu30) Returns a new vector from the specified vector of 64-bit, signed integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-o3yk) Returns a new vector from the specified vector of 64-bit, unsigned integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-o7ac) Returns a new vector from the specified vector of 32-bit, floating point elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-o6mk) Returns a new vector from the specified vector of 64-bit, floating point elements. ### Common Functions [`simd_clamp(_:_:_:)`](/documentation/simd/simd_clamp(_:_:_:)-6mt76) Returns each element in a vector clamped to a specified range. [`simd_equal(_:_:)`](/documentation/simd/simd_equal(_:_:)-4dws0) Returns true if every element in a matrix is exactly equal to the corresponding element in a second matrix, and otherwise returns false. ### Reduce Functions [`simd_reduce_min(_:)`](/documentation/simd/simd_reduce_min(_:)-3oaqy) Returns the miniumum value in a vector. [`simd_reduce_max(_:)`](/documentation/simd/simd_reduce_max(_:)-55c36) Returns the maximum value in a vector. [`simd_reduce_add(_:)`](/documentation/simd/simd_reduce_add(_:)-3avzc) Returns the sum of all elements in a vector. ### Extrema Functions [`simd_min(_:_:)`](/documentation/simd/simd_min(_:_:)-1ynv5) Returns the minimum value of each element in a vector. [`simd_max(_:_:)`](/documentation/simd/simd_max(_:_:)-9mj3u) Returns the maximum value of each element in a vector. ### Logic and Bitwise Functions [`simd_any(_:)`](/documentation/simd/simd_any(_:)-6p9gh) [`simd_all(_:)`](/documentation/simd/simd_all(_:)-1yolz) [`simd_bitselect(_:_:_:)`](/documentation/simd/simd_bitselect(_:_:_:)-3xirg) Returns a vector that contains elements from either the first or second parameter, based on the corresponding element in the third parameter. ### Alternative Type Alias [`vector_ulong8`](/documentation/simd/vector_ulong8) --- 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)