# simd_long4 A vector of four 64-bit signed integer elements. ``` typealias simd_long4 = SIMD4 ``` ## Topics ### Functions to Create Four-Element Vectors From Other Vectors [`simd_make_long4(_:)`](/documentation/simd/simd_make_long4(_:)-98er2) Returns a new vector from the specified two-element vector, and other elements set to zero. [`simd_make_long4(_:)`](/documentation/simd/simd_make_long4(_:)-94zwx) Returns a new vector from the specified three-element vector, and other elements set to zero. [`simd_make_long4(_:)`](/documentation/simd/simd_make_long4(_:)-8op7o) Returns a new vector from the specified vector. [`simd_make_long4(_:)`](/documentation/simd/simd_make_long4(_:)-9tamg) Returns a new vector by truncating the specified eight-element vector. [`simd_make_long4(_:_:)`](/documentation/simd/simd_make_long4(_:_:)-51qs4) Returns a new vector from the specified vectors. [`vector4`](/documentation/simd/vector4-5mcxh) Returns a new vector from the specified vectors. [`simd_make_long4_undef(_:)`](/documentation/simd/simd_make_long4_undef(_:)-31uo1) Returns a new vector from the specified two-element vector, and other elements undefined. [`simd_make_long4_undef(_:)`](/documentation/simd/simd_make_long4_undef(_:)-345km) Returns a new vector from the specified three-element vector, and other elements undefined. ### Conversion to Signed 64-Bit (Round Half to Even) Functions [`simd_long_rte`](/documentation/simd/simd_long_rte-7twh9) Returns a new four-element vector by rounding halves to the nearest even value. ### Functions to Create Four-Element Vectors From Scalar Values [`simd_make_long4(_:)`](/documentation/simd/simd_make_long4(_:)-4ir93) Returns a new vector with the first element set to a scalar value, and other elements set to zero. [`simd_make_long4(_:_:_:_:)`](/documentation/simd/simd_make_long4(_:_:_:_:)) Returns a new vector from the specified scalar values. [`vector4`](/documentation/simd/vector4-96he8) Returns a new vector from the specified scalar values. [`simd_make_long4_undef(_:)`](/documentation/simd/simd_make_long4_undef(_:)-6bf3i) Returns a new vector with the first element set to a scalar value, and other elements undefined. ### Functions to Create Four-Element Vectors From Combinations of Vectors and Scalar Values [`simd_make_long4(_:_:_:)`](/documentation/simd/simd_make_long4(_:_:_:)-5o04d) Returns a new vector from two scalar values and a vector. [`simd_make_long4(_:_:_:)`](/documentation/simd/simd_make_long4(_:_:_:)-1oyio) Returns a new vector from a scalar value, a vector, and a scalar value. [`simd_make_long4(_:_:)`](/documentation/simd/simd_make_long4(_:_:)-837pc) Returns a new vector from a scalar value and a vector. [`simd_make_long4(_:_:_:)`](/documentation/simd/simd_make_long4(_:_:_:)-6ici1) Returns a new vector from a vector and scalar values. [`simd_make_long4(_:_:)`](/documentation/simd/simd_make_long4(_:_:)-270ke) Returns a new vector from a vector and a scalar value. [`vector4`](/documentation/simd/vector4-5gopv) Returns a new vector from a vector and a scalar value. ### Functions to Create Four-Element Vectors From Vectors of Other Types [`simd_long`](/documentation/simd/simd_long-9x5l) Returns a new vector from the specified vector of 8-bit, signed integer elements. [`simd_long`](/documentation/simd/simd_long-a715) Returns a new vector from the specified vector of 8-bit, unsigned integer elements. [`simd_long`](/documentation/simd/simd_long-a255) Returns a new vector from the specified vector of 16-bit, signed integer elements. [`simd_long`](/documentation/simd/simd_long-ac49) Returns a new vector from the specified vector of 16-bit, unsigned integer elements. [`simd_long`](/documentation/simd/simd_long-9yxd) Returns a new vector from the specified vector of 32-bit, signed integer elements. [`simd_long`](/documentation/simd/simd_long-a8wh) Returns a new vector from the specified vector of 32-bit, unsigned integer elements. [`simd_long`](/documentation/simd/simd_long-9xiz) Returns a new vector from the specified vector of 64-bit, signed integer elements. [`simd_long`](/documentation/simd/simd_long-a7cr) Returns a new vector from the specified vector of 64-bit, unsigned integer elements. [`simd_long`](/documentation/simd/simd_long-a5mn) Returns a new vector from the specified vector of 32-bit, floating-point elements. [`simd_long`](/documentation/simd/simd_long-a4uz) 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_long_sat`](/documentation/simd/simd_long_sat-5ldhe) Returns a new vector from the specified vector of 8-bit, signed integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-5ln9e) Returns a new vector from the specified vector of 8-bit, unsigned integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-5lihu) Returns a new vector from the specified vector of 16-bit, signed integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-5ls82) Returns a new vector from the specified vector of 16-bit, unsigned integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-5la9i) Returns a new vector from the specified vector of 32-bit, signed integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-5lk6u) Returns a new vector from the specified vector of 32-bit, unsigned integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-5lbza) Returns a new vector from the specified vector of 64-bit, signed integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-5llpi) Returns a new vector from the specified vector of 64-bit, unsigned integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-5loyi) Returns a new vector from the specified vector of 32-bit, floating point elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-5lody) Returns a new vector from the specified vector of 64-bit, floating point elements. ### Common Functions [`simd_abs(_:)`](/documentation/simd/simd_abs(_:)-81f1k) Returns the absolute value of each element in a vector. [`simd_clamp(_:_:_:)`](/documentation/simd/simd_clamp(_:_:_:)-69473) Returns each element in a vector clamped to a specified range. [`simd_equal(_:_:)`](/documentation/simd/simd_equal(_:_:)-4wnv3) 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(_:)-4ua4m) Returns the miniumum value in a vector. [`simd_reduce_max(_:)`](/documentation/simd/simd_reduce_max(_:)-4qin2) Returns the maximum value in a vector. [`simd_reduce_add(_:)`](/documentation/simd/simd_reduce_add(_:)-2ya50) Returns the sum of all elements in a vector. ### Extrema Functions [`simd_min(_:_:)`](/documentation/simd/simd_min(_:_:)-4y4aq) Returns the minimum value of each element in a vector. [`simd_max(_:_:)`](/documentation/simd/simd_max(_:_:)-3enrf) Returns the maximum value of each element in a vector. ### Logic and Bitwise Functions [`simd_any(_:)`](/documentation/simd/simd_any(_:)-6cnfh) [`simd_all(_:)`](/documentation/simd/simd_all(_:)-1jv5n) [`simd_bitselect(_:_:_:)`](/documentation/simd/simd_bitselect(_:_:_:)-9f5q6) 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_long4`](/documentation/simd/vector_long4) --- 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)