Intel® oneAPI Math Kernel Library Developer Reference - C
Performs scaling and in-place transposition/copying of matrices.
void mkl_simatcopy (const char ordering, const char trans, size_t rows, size_t cols, const float alpha, float * AB, size_t lda, size_t ldb);
void mkl_dimatcopy (const char ordering, const char trans, size_t rows, size_t cols, const double alpha, double * AB, size_t lda, size_t ldb);
void mkl_cimatcopy (const char ordering, const char trans, size_t rows, size_t cols, const MKL_Complex8 alpha, MKL_Complex8 * AB, size_t lda, size_t ldb);
void mkl_zimatcopy (const char ordering, const char trans, size_t rows, size_t cols, const MKL_Complex16 alpha, MKL_Complex16 * AB, size_t lda, size_t ldb);
The mkl_?imatcopy routine performs scaling and in-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:
AB := alpha*op(AB).
Different arrays must not overlap.
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.
Parameter that specifies the operation type.
If trans = 'N' or 'n', op(AB)=AB and the matrix AB is assumed unchanged on input.
If trans = 'T' or 't', it is assumed that AB should be transposed.
If trans = 'C' or 'c', it is assumed that AB should be conjugate transposed.
If trans = 'R' or 'r', it is assumed that AB 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'.
The number of rows in matrix AB before the transpose operation.
The number of columns in matrix AB before the transpose operation.
Array.
This parameter scales the input matrix by alpha.
Distance between the first elements in adjacent columns (in the case of the column-major order) or rows (in the case of the row-major order) in the source matrix; measured in the number of elements.
This parameter must be at least rows if ordering = 'C' or 'c', and max(1,cols) otherwise.
Distance between the first elements in adjacent columns (in the case of the column-major order) or rows (in the case of the row-major order) in the destination matrix; measured in the number of elements.
To determine the minimum value of ldb on output, consider the following guideline:
If ordering = 'C' or 'c', then
If trans = 'T' or 't' or 'C' or 'c', this parameter must be at least max(1,cols)
If trans = 'N' or 'n' or 'R' or 'r', this parameter must be at least max(1,rows)
If ordering = 'R' or 'r', then
If trans = 'T' or 't' or 'C' or 'c', this parameter must be at least max(1,rows)
If trans = 'N' or 'n' or 'R' or 'r', this parameter must be at least max(1,cols)
Array.
Contains the matrix AB.
For threading to be active in mkl_?imatcopy, the pointer AB must be aligned on the 64-byte boundary. This requirement can be met by allocating AB with mkl_malloc.