cblas_?axpby

Syntax

void cblas_saxpby (const MKL_INT n, const float a, const float *x, const MKL_INT incx, const float b, float *y, const MKL_INT incy);

void cblas_daxpby (const MKL_INT n, const double a, const double *x, const MKL_INT incx, const double b, double *y, const MKL_INT incy);

void cblas_caxpby (const MKL_INT n, const void *a, const void *x, const MKL_INT incx, const void *b, void *y, const MKL_INT incy);

void cblas_zaxpby (const MKL_INT n, const void *a, const void *x, const MKL_INT incx, const void *b, void *y, const MKL_INT incy);

Include Files

• mkl.h

Description

The ?axpby routines perform a vector-vector operation defined as

y := a*x + b*y

where:

a and b are scalars

x and y are vectors each with n elements.

Input Parameters

n

Specifies the number of elements in vectors x and y.

a

Specifies the scalar a.

x

Array, size at least (1 + (n-1)*abs(incx)).

incx

Specifies the increment for the elements of x.

b

Specifies the scalar b.

y

Array, size at least (1 + (n-1)*abs(incy)).

incy

Specifies the increment for the elements of y.

Output Parameters

y

Contains the updated vector y.

Example

For examples of routine usage, see these code examples in the Intel® oneAPI Math Kernel Library installation directory:

• cblas_saxpby: examples\cblas\source\cblas_saxpbyx.c

• cblas_daxpby: examples\cblas\source\cblas_daxpbyx.c

• cblas_caxpby: examples\cblas\source\cblas_caxpbyx.c

• cblas_zaxpby: examples\cblas\source\cblas_zaxpbyx.c