Function

vDSP_vaddi

Adds two integer vectors.

Declaration

void vDSP_vaddi(const int *__A, vDSP_Stride __IA, const int *__B, vDSP_Stride __IB, int *__C, vDSP_Stride __IC, vDSP_Length __N);

Parameters

__A

Integer input vector.

__IA

Stride for A.

__B

Integer input vector

__IB

Stride for B.

__C

Integer result vector.

__IC

Stride for C.

__N

Number of elements to process in the input and output vectors.

Discussion

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

A diagram showing the operation of the vDSP_vaddi 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_vaddi:

let stride = vDSP_Stride(1)

let a: [Int32] = [10, 20, 30, 40, 50]
let b: [Int32] = [ 1,  2,  3,  4,  5]

let n = vDSP_Length(a.count)

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

vDSP_vaddi(a, stride,
           b, stride,
           &c, stride,
           n)

// Prints "[11, 22, 33, 44, 55]"
print(c)

See Also

Vector-to-Vector Integer Arithmetic

vDSP_veqvi

Calculates bitwise logical equivalence of two integer vectors.

vDSP_vdivi

Divides two integer vectors.