mkl_?omatcopy

Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

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ID 766686

Date 3/31/2023

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mkl_?omatcopy

Performs scaling and out-place transposition/copying of matrices.

Syntax

call mkl_somatcopy(ordering, trans, rows, cols, alpha, a, lda, b, ldb)

call mkl_domatcopy(ordering, trans, rows, cols, alpha, a, lda, b, ldb)

call mkl_comatcopy(ordering, trans, rows, cols, alpha, a, lda, b, ldb)

call mkl_zomatcopy(ordering, trans, rows, cols, alpha, a, lda, b, ldb)

Include Files

mkl.fi

Description

The mkl_?omatcopy routine performs scaling and out-of-place transposition/copying of matrices. A transposition operation can be a normal matrix copy, a transposition, a conjugate transposition, or just a conjugation. The operation is defined as follows:

B := alpha*op(A)

The routine parameter descriptions are common for all implemented interfaces with the exception of data types that mostly refer here to the FORTRAN 77 standard types. Data types specific to the different interfaces are described in the section "Interfaces" below.

NOTE:

Different arrays must not overlap.

Input Parameters

ordering

CHARACTER*1. Ordering of the matrix storage.

If ordering = 'R' or 'r', the ordering is row-major.

If ordering = 'C' or 'c', the ordering is column-major.

trans

CHARACTER*1. Parameter that specifies the operation type.

If trans = 'N' or 'n', op(A)=A and the matrix A is assumed unchanged on input.

If trans = 'T' or 't', it is assumed that A should be transposed.

If trans = 'C' or 'c', it is assumed that A should be conjugate transposed.

If trans = 'R' or 'r', it is assumed that A should be only conjugated.

If the data is real, then trans = 'R' is the same as trans = 'N', and trans = 'C' is the same as trans = 'T'.

rows

INTEGER. The number of rows in matrix A (the input matrix).

cols

INTEGER. The number of columns in matrix A (the input matrix).

alpha

REAL for mkl_somatcopy.

DOUBLE PRECISION for mkl_domatcopy.

COMPLEX for mkl_comatcopy.

DOUBLE COMPLEX for mkl_zomatcopy.

This parameter scales the input matrix by alpha.

a

REAL for mkl_somatcopy.

DOUBLE PRECISION for mkl_domatcopy.

COMPLEX for mkl_comatcopy.

DOUBLE COMPLEX for mkl_zomatcopy.

Input array.

If ordering = 'R' or 'r', the size of a is lda*rows.

If ordering = 'C' or 'c', the size of a is lda*cols.

lda

INTEGER. (Fortran interface).

If ordering = 'R' or 'r', lda represents the number of elements in array a between adjacent rows of matrix A; lda must be at least equal to the number of columns of matrix A.

If ordering = 'C' or 'c', lda represents the number of elements in array a between adjacent columns of matrix A; lda must be at least equal to the number of row in matrix A.

b

REAL for mkl_somatcopy.

DOUBLE PRECISION for mkl_domatcopy.

COMPLEX for mkl_comatcopy.

DOUBLE COMPLEX for mkl_zomatcopy.

Output array.

If ordering = 'R' or 'r';

If trans = 'T' or 't' or 'C' or 'c', the size of b is ldb * cols.
If trans = 'N' or 'n' or 'R' or 'r', the size of b is ldb * rows.

If ordering = 'C' or 'c';

If trans = 'T' or 't' or 'C' or 'c', the size of b is ldb * rows.
If trans = 'N' or 'n' or 'R' or 'r', the size of b is ldb * cols.

ldb

INTEGER. (Fortran interface).

If ordering = 'R' or 'r', ldb represents the number of elements in array b between adjacent rows of matrix B.

If trans = 'T' or 't' or 'C' or 'c', ldb must be at least equal to rows.
If trans = 'N' or 'n' or 'R' or 'r', ldb must be at least equal to cols.

If ordering = 'C' or 'c', ldb represents the number of elements in array b between adjacent columns of matrix B.

If trans = 'T' or 't' or 'C' or 'c', ldb must be at least equal to cols.
If trans = 'N' or 'n' or 'R' or 'r', ldb must be at least equal to rows.

Output Parameters

b

REAL for mkl_somatcopy.

DOUBLE PRECISION for mkl_domatcopy.

COMPLEX for mkl_comatcopy.

DOUBLE COMPLEX for mkl_zomatcopy.

Output array.

Contains the destination matrix.

Interfaces

FORTRAN 77:

SUBROUTINE mkl_somatcopy ( ordering, trans, rows, cols, alpha, a, lda, b, ldb )
   CHARACTER*1 ordering, trans
   INTEGER rows, cols, lda, ldb
   REAL alpha, b(ldb,*), a(lda,*)

SUBROUTINE mkl_domatcopy ( ordering, trans, rows, cols, alpha, a, lda, b, ldb )
   CHARACTER*1 ordering, trans
   INTEGER rows, cols, lda, ldb
   DOUBLE PRECISION alpha, b(ldb,*), a(lda,*)

SUBROUTINE mkl_comatcopy ( ordering, trans, rows, cols, alpha, a, lda, b, ldb )
   CHARACTER*1 ordering, trans
   INTEGER rows, cols, lda, ldb
   COMPLEX alpha, b(ldb,*), a(lda,*)

SUBROUTINE mkl_zomatcopy ( ordering, trans, rows, cols, alpha, a, lda, b, ldb )
   CHARACTER*1 ordering, trans
   INTEGER rows, cols, lda, ldb
   DOUBLE COMPLEX alpha, b(ldb,*), a(lda,*)

Parent topic: BLAS-like Extensions

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Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

mkl_?omatcopy

FORTRAN 77: