Calculates bitwise logical equivalence of two integer vectors.


func vDSP_veqvi(_ __A: UnsafePointer<Int32>, _ __IA: vDSP_Stride, _ __B: UnsafePointer<Int32>, _ __IB: vDSP_Stride, _ __C: UnsafeMutablePointer<Int32>, _ __IC: vDSP_Stride, _ __N: vDSP_Length)



Integer input vector.


Stride for A.


Integer input vector.


Stride for B.


Integer output vector.


Stride for C.


The number of elements to process.


This function calculates the bitwise logical equivalence of the first N elements of A and B, writing the result to C:

A diagram showing the operation of the vDSP_veqvi function. There are three rows. The top row represents the first input, vector A. The second row represents the second input, vector B. The bottom row represents the output, vector C. The diagram has connecting lines from the input vectors to the output vector indicating the relationships between the inputs and output.

The operation is:

for (n = 0; n < N; ++n)
    C[n] = ~(A[n] ^ B[n]);

The following code shows an example of using vDSP_veqvi(_:_:_:_:_:_:_:):

let stride = vDSP_Stride(1)

let a: [Int32] = [0, 0, 1, 1]
let b: [Int32] = [0, 1, 0, 1]

let n = vDSP_Length(a.count)

var c = [Int32](repeating: 0,
                count: a.count)

vDSP_veqvi(b, stride,
           a, stride,
           &c, stride,

// Prints "[-1, -2, -2, -1]"

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software