Overview

Computes the hyperbolic tangent of each element of the aVector:

c[i] = tanh(a[i])

Dispatcher Prototype

void volk_32f_tanh_32f(float* cVector, const float* aVector, unsigned int num_points)

Inputs

• aVector: The buffer of points.
• num_points: The number of values in input buffer.

Outputs

• cVector: The output buffer.

Example

int N = 10;
unsigned int alignment = volk_get_alignment();
float* in = (float*)volk_malloc(sizeof(float)*N, alignment);
float* out = (float*)volk_malloc(sizeof(float)*N, alignment);
 
for(unsigned int ii = 0; ii < N; ++ii){
    // the approximate artanh(x) for x<1
    float x = (float)ii / (float)N;
    in[ii] = 0.5 * std::log((1.f+x)/(1.f-x));
}
 
volk_32f_tanh_32f(out, in, N);
 
for(unsigned int ii = 0; ii < N; ++ii){
    printf("out(%i) = %f\n", ii, out[ii]);
}
 
volk_free(in);
volk_free(out);