vDSP_vadd

Declaration

extern void vDSP_vadd(const float *__A, vDSP_Stride __IA, const float *__B, vDSP_Stride __IB, float *__C, vDSP_Stride __IC, vDSP_Length __N);

Parameters

• __A:

  The first input vector, A.

• __IA:

  The distance between the elements in the first input vector.

• __B:

  The second input vector, B.

• __IB:

  The distance between the elements in the second input vector.

• __C:

  The output vector, C.

• __IC:

  The distance between the elements in the output vector.

• __N:

  The number of elements that the function processes.

Mentioned in

• Controlling vDSP operations with stride

Discussion

This function calculates the sums of the first N elements of input vectors A and B, and writes the result to output vector C.

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

[Image]

The following code shows an example of using this function:

    let stride = 1
    let count = 5

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

    let c = [Float](unsafeUninitializedCapacity: count) {
        buffer, initializedCount in
        
        vDSP_vadd(a, stride,
                  b, stride,
                  buffer.baseAddress!, stride,
                  vDSP_Length(count))
        
        initializedCount = count
    }
   
    // Prints "[11.0, 22.0, 33.0, 44.0, 55.0]".
    print(c)

See Also

Binary addition operations

• vDSP_vaddD