# simd_long8 A vector of eight 64-bit signed integer elements. ``` typealias simd_long8 = SIMD8 ``` ## Topics ### Functions to Create Eight-Element Vectors From Other Vectors [`simd_make_long8(_:)`](/documentation/simd/simd_make_long8(_:)-7pzt7) Returns a new vector from the specified two-element vector, and other elements set to zero. [`simd_make_long8(_:)`](/documentation/simd/simd_make_long8(_:)-7netg) Returns a new vector from the specified three-element vector, and other elements set to zero. [`simd_make_long8(_:)`](/documentation/simd/simd_make_long8(_:)-7wvxt) Returns a new vector from the specified four-element vector, and other elements set to zero. [`simd_make_long8(_:)`](/documentation/simd/simd_make_long8(_:)-6saal) Returns a new vector from the specified vector. [`simd_make_long8(_:_:)`](/documentation/simd/simd_make_long8(_:_:)) Returns a new vector from the specified vectors. [`vector8`](/documentation/simd/vector8-6qxy0) Returns a new vector from the specified vectors. [`simd_make_long8_undef(_:)`](/documentation/simd/simd_make_long8_undef(_:)-5uowh) Returns a new vector from the specified two-element vector, and other elements undefined. [`simd_make_long8_undef(_:)`](/documentation/simd/simd_make_long8_undef(_:)-5y3qm) Returns a new vector from the specified three-element vector, and other elements undefined. [`simd_make_long8_undef(_:)`](/documentation/simd/simd_make_long8_undef(_:)-59t0j) Returns a new vector from the specified four-element vector, and other elements undefined. ### Conversion to Signed 64-Bit (Round Half to Even) Functions [`simd_long_rte`](/documentation/simd/simd_long_rte-90anl) Returns a new eight-element vector by rounding halves to the nearest even value. ### Functions to Create Eight-Element Vectors From Scalar Values [`simd_make_long8(_:)`](/documentation/simd/simd_make_long8(_:)-2kqft) Returns a new vector with the first element set to a scalar value, and other elements set to zero. [`simd_make_long8_undef(_:)`](/documentation/simd/simd_make_long8_undef(_:)-9h1v1) 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_long`](/documentation/simd/simd_long-93qrw) Returns a new vector from the specified vector of 8-bit, signed integer elements. [`simd_long`](/documentation/simd/simd_long-93gss) Returns a new vector from the specified vector of 8-bit, unsigned integer elements. [`simd_long`](/documentation/simd/simd_long-93vu4) Returns a new vector from the specified vector of 16-bit, signed integer elements. [`simd_long`](/documentation/simd/simd_long-93lpo) Returns a new vector from the specified vector of 16-bit, unsigned integer elements. [`simd_long`](/documentation/simd/simd_long-93sno) Returns a new vector from the specified vector of 32-bit, signed integer elements. [`simd_long`](/documentation/simd/simd_long-93iok) Returns a new vector from the specified vector of 32-bit, unsigned integer elements. [`simd_long`](/documentation/simd/simd_long-93ti0) Returns a new vector from the specified vector of 64-bit, signed integer elements. [`simd_long`](/documentation/simd/simd_long-93jiw) Returns a new vector from the specified vector of 64-bit, unsigned integer elements. [`simd_long`](/documentation/simd/simd_long-93hmw) Returns a new vector from the specified vector of 32-bit, floating-point elements. [`simd_long`](/documentation/simd/simd_long-93h2w) 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-6s8z2) Returns a new vector from the specified vector of 8-bit, signed integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-6rz5a) Returns a new vector from the specified vector of 8-bit, unsigned integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-6sdu6) Returns a new vector from the specified vector of 16-bit, signed integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-6s426) Returns a new vector from the specified vector of 16-bit, unsigned integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-6s5qq) Returns a new vector from the specified vector of 32-bit, signed integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-6rvv6) Returns a new vector from the specified vector of 32-bit, unsigned integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-6s53e) Returns a new vector from the specified vector of 64-bit, signed integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-6rux6) Returns a new vector from the specified vector of 64-bit, unsigned integer elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-6ry46) Returns a new vector from the specified vector of 32-bit, floating point elements. [`simd_long_sat`](/documentation/simd/simd_long_sat-6rxje) Returns a new vector from the specified vector of 64-bit, floating point elements. ### Common Functions [`simd_abs(_:)`](/documentation/simd/simd_abs(_:)-7osxw) Returns the absolute value of each element in a vector. [`simd_clamp(_:_:_:)`](/documentation/simd/simd_clamp(_:_:_:)-7h5og) Returns the absolute value of each element in a vector. [`simd_equal(_:_:)`](/documentation/simd/simd_equal(_:_:)-1fygf) 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(_:)-3okve) Returns the miniumum value in a vector. [`simd_reduce_max(_:)`](/documentation/simd/simd_reduce_max(_:)-55m7m) Returns the maximum value in a vector. [`simd_reduce_add(_:)`](/documentation/simd/simd_reduce_add(_:)-3b63s) Returns the sum of all elements in a vector. ### Extrema Functions [`simd_min(_:_:)`](/documentation/simd/simd_min(_:_:)-1z34d) Returns the minimum value of each element in a vector. [`simd_max(_:_:)`](/documentation/simd/simd_max(_:_:)-4cbvp) Returns the maximum value of each element in a vector. ### Logic and Bitwise Functions [`simd_any(_:)`](/documentation/simd/simd_any(_:)-6pjhd) [`simd_all(_:)`](/documentation/simd/simd_all(_:)-1yys7) [`simd_bitselect(_:_:_:)`](/documentation/simd/simd_bitselect(_:_:_:)-5k6g) 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_long8`](/documentation/simd/vector_long8) --- 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)