Computes a vector-scalar product and adds the result to a vector.
void axpy(queue &exec_queue, std::int64_t n, T alpha, buffer<T,1> &x, std::int64_t incx, buffer<T,1> &y, std::int64_t incy);
axpy supports the following precisions and devices.
T | Devices Supported |
---|---|
float | Host, CPU, and GPU |
double | Host, CPU, and GPU |
std::complex<float> | Host, CPU, and GPU |
std::complex<double> | Host, CPU, and GPU |
The axpy routines compute a scalar-vector product and add the result to a vector:
y <- alpha*x+y
where:
x and y are vectors of n elements,
alpha is a scalar.
The queue where the routine should be executed.
Number of elements in vector x.
Specifies the scalar alpha.
Buffer holding input vector x. The buffer must be of size at least (1 + (n – 1)*abs(incx)). See Matrix and Vector Storage for more details.
Stride of vector x.
Buffer holding input vector y. The buffer must be of size at least (1 + (n – 1)*abs(incy)). See Matrix and Vector Storage for more details.
Stride of vector y.
Buffer holding the updated vector y.
An example of how to use axpycan be found in the Intel® oneMKL installation directory, under:
examples/sycl/blas/axpy.cpp