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
	)