Function

vDSP_svdiv(_:_:_:_:_:_:)

Divides a single-precision scalar value by a single-precision vector.

Declaration

func vDSP_svdiv(_ __A: UnsafePointer<Float>, _ __B: UnsafePointer<Float>, _ __IB: vDSP_Stride, _ __C: UnsafeMutablePointer<Float>, _ __IC: vDSP_Stride, _ __N: vDSP_Length)

Parameters

__A

Pointer to single-precision real input scalar.

__B

Single-precision real input vector.

__IB

Stride for B.

__C

Single-precision real output vector.

__IC

Stride for C.

__N

The number of elements to process.

Discussion

This function calculates the scalar value A divied by the first N elements of B, writing the result to C:

A diagram showing the operation of the vDSP_svdiv function. There are three rows. The top row represents the first input, scalar 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 / B[n];

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

let stride = vDSP_Stride(1)

var a: Float = 2
let b: [Float] = [1, 2, 4, 5]


let n = vDSP_Length(b.count)

var c = [Float](repeating: 0,
                count: b.count)

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

// Prints "[2, 1, 0.5, 0.4]"
print(c)

See Also

Binary (Scalar-Vector) Division Operations