 Documentation
af_dot/cublas_dot

C interface for Dot Product. More...

 afError af_dot_S (float *h_res, unsigned len, const float *d_A, const float *d_B) afError af_dot_D (double *h_res, unsigned len, const double *d_A, const double *d_B) afError af_dot_C (cfloat *h_res, unsigned len, const cfloat *d_A, const cfloat *d_B) afError af_dot_Z (cdouble *h_res, unsigned len, const cdouble *d_A, const cdouble *d_B)

## Detailed Description

C interface for Dot Product.

Scalar dot product between two vectors. Also referred to as the inner product.

This function returns the scalar product of two equal sized vectors or between a matrix and a vector. The second operand needs to be a vector in either case.

 
// compute scalar dot product of two vectors
float a[] = {1, 2, 3};
float b[] = {2, 3, 4};
array A(3,a);
array B(3,b);
print(A);
print(B);
print(dot(A,B));
 

The dot product between a matrix and a vector is defined in a similar fashion:

 
float a_buff[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1};
float b_buff[] = {0, 1, 2, 3};

array A(4, 3, a_buff);
array B(4, b_buff);
print(A);
print(B);
print(dot(A, B)); ## Function Documentation

 afError af_dot_S ( float * h_res, unsigned len, const float * d_A, const float * d_B )
Parameters
 [out] h_res The output. (Host pointer); [in] len The length of the vectors [in] d_A Device pointer to the first vector [in] d_B Device pointer to the second vector
 afError af_dot_D ( double * h_res, unsigned len, const double * d_A, const double * d_B )
 afError af_dot_C ( cfloat * h_res, unsigned len, const cfloat * d_A, const cfloat * d_B )
 afError af_dot_Z ( cdouble * h_res, unsigned len, const cdouble * d_A, const cdouble * d_B )