Visible to Intel only — GUID: GUID-D2F71377-B47A-4BA9-B94E-4962AF1956D1
Visible to Intel only — GUID: GUID-D2F71377-B47A-4BA9-B94E-4962AF1956D1
?axpy_batch_strided
Computes a group of vector-scalar products added to a vector.
Syntax
call saxpy_batch_strided(n, alpha, x, incx, stridex, y, incy, stridey, batch_size)
call daxpy_batch_strided(n, alpha, x, incx, stridex, y, incy, stridey, batch_size)
call caxpy_batch_strided(n, alpha, x, incx, stridex, y, incy, stridey, batch_size)
call zaxpy_batch_strided(n, alpha, x, incx, stridex, y, incy, stridey, batch_size)
Include Files
- mkl.fi
Description
The ?axpy_batch_strided routines perform a series of scalar-vector product added to a vector. They are similar to the ?axpy routine counterparts, but the ?axpy_batch_strided routines perform vector operations with a group of vectors.
All vector x (respectively, y) have the same parameters (size, increments) and are stored at constant stridex (respectively, stridey) from each other. The operation is defined as
For i = 0 … batch_size – 1 X and Y are vectors at offset i * stridex and i * stridey in x and y Y = alpha * X + Y end for
Input Parameters
- n
-
INTEGER. Number of elements in vectors x and y.
- alpha
-
REAL for saxpy_batch_strided
DOUBLE PRECISION for daxpy_batch_strided
COMPLEX for caxpy_batch_strided
DOUBLE COMPLEX for zaxpy_batch_strided
Specifies the scalar alpha.
- x
-
REAL for saxpy_batch_strided
DOUBLE PRECISION for daxpy_batch_strided
COMPLEX for caxpy_batch_strided
DOUBLE COMPLEX for zaxpy_batch_strided
Array of size at least stridex*batch_size holding the x vectors.
- incx
-
INTEGER. Specifies the increment for the elements of x.
- stridex
-
INTEGER. Stride between two consecutive x vectors; must be at least zero.
- y
-
REAL for saxpy_batch_strided
DOUBLE PRECISION for daxpy_batch_strided
COMPLEX for caxpy_batch_strided
DOUBLE COMPLEX for zaxpy_batch_strided
Array of size at least stridey*batch_size holding the y vectors.
- incy
-
INTEGER. Specifies the increment for the elements of y.
- stridey
-
INTEGER. Stride between two consecutive y vectors; must be at least (1 + (n-1)*abs(incy)).
- batch_size
-
INTEGER. Number of axpy computations to perform and x and y vectors. Must be at least 0.
Output Parameters
- y
-
Array holding the batch_size updated vector y.