# simd_ulong2 A vector of two 64-bit unsigned integer elements. ``` typealias simd_ulong2 = SIMD2 ``` ## Topics ### Functions to Create Two-Element Vectors From Other Vectors [`simd_make_ulong2(_:)`](/documentation/simd/simd_make_ulong2(_:)-oc6t) Returns a new vector from the specified vector. [`simd_make_ulong2(_:)`](/documentation/simd/simd_make_ulong2(_:)-rr3e) Returns a new vector by truncating the specified three-element vector. [`simd_make_ulong2(_:)`](/documentation/simd/simd_make_ulong2(_:)-ulyf) Returns a new vector by truncating the specified four-element vector. [`simd_make_ulong2(_:)`](/documentation/simd/simd_make_ulong2(_:)-17hvf) Returns a new vector by truncating the specified eight-element vector. ### Functions to Create Two-Element Vectors From Scalar Values [`simd_make_ulong2(_:)`](/documentation/simd/simd_make_ulong2(_:)-14omj) Returns a new vector with the first element set to a scalar value, and other elements set to zero. [`simd_make_ulong2(_:_:)`](/documentation/simd/simd_make_ulong2(_:_:)) Returns a new vector from the specified scalar values. [`vector2`](/documentation/simd/vector2-6n9bx) Returns a new vector from the specified scalar values. [`simd_make_ulong2_undef(_:)`](/documentation/simd/simd_make_ulong2_undef(_:)) Returns a new vector with the first element set to a scalar value, and other elements undefined. ### Functions to Create Two-Element Vectors From Vectors of Other Types [`simd_ulong`](/documentation/simd/simd_ulong-1r8xg) Returns a new vector from the specified vector of 8-bit, signed integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-1rir8) Returns a new vector from the specified vector of 8-bit, unsigned integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-1rdv8) Returns a new vector from the specified vector of 16-bit, signed integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-1rnp0) Returns a new vector from the specified vector of 16-bit, unsigned integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-1rbpo) Returns a new vector from the specified vector of 32-bit, signed integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-1rlsc) Returns a new vector from the specified vector of 32-bit, unsigned integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-1rb2o) Returns a new vector from the specified vector of 64-bit, signed integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-1rkuo) Returns a new vector from the specified vector of 64-bit, unsigned integer elements. [`simd_ulong`](/documentation/simd/simd_ulong-1rhpk) Returns a new vector from the specified vector of 32-bit, floating-point elements. [`simd_ulong`](/documentation/simd/simd_ulong-1ri80) 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-1lmym) Returns a new vector from the specified vector of 8-bit, signed integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-1lwse) Returns a new vector from the specified vector of 8-bit, unsigned integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-1lrzy) Returns a new vector from the specified vector of 16-bit, signed integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-1m1q6) Returns a new vector from the specified vector of 16-bit, unsigned integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-1ll2i) Returns a new vector from the specified vector of 32-bit, signed integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-1lv3e) Returns a new vector from the specified vector of 32-bit, unsigned integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-1llwi) Returns a new vector from the specified vector of 64-bit, signed integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-1lvtu) Returns a new vector from the specified vector of 64-bit, unsigned integer elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-1lxxa) Returns a new vector from the specified vector of 32-bit, floating-point elements. [`simd_ulong_sat`](/documentation/simd/simd_ulong_sat-1lyhe) Returns a new vector from the specified vector of 64-bit, floating-point elements. ### Common Functions [`simd_clamp(_:_:_:)`](/documentation/simd/simd_clamp(_:_:_:)-5y5rd) Returns each element in a vector clamped to a specified range. [`simd_equal(_:_:)`](/documentation/simd/simd_equal(_:_:)-80jzi) Returns true if every element in a vector is exactly equal to the corresponding element in a second vector, and otherwise returns false. ### Reduce Functions [`simd_reduce_min(_:)`](/documentation/simd/simd_reduce_min(_:)-49qq4) Returns the miniumum value in a vector. [`simd_reduce_max(_:)`](/documentation/simd/simd_reduce_max(_:)-4kgd8) Returns the maximum value in a vector. [`simd_reduce_add(_:)`](/documentation/simd/simd_reduce_add(_:)-2q2jq) Returns the sum of all elements in a vector. ### Extrema Functions [`simd_min(_:_:)`](/documentation/simd/simd_min(_:_:)-9be6) Returns the minimum value of each element in a vector. [`simd_max(_:_:)`](/documentation/simd/simd_max(_:_:)-86a4g) Returns the maximum value of each element in a vector. ### Logic and Bitwise Functions [`simd_any(_:)`](/documentation/simd/simd_any(_:)-64g1r) [`simd_all(_:)`](/documentation/simd/simd_all(_:)-1d8u9) [`simd_bitselect(_:_:_:)`](/documentation/simd/simd_bitselect(_:_:_:)-886h0) 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_ulong2`](/documentation/simd/vector_ulong2) --- 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)