Arguments

UPLO

(global input) CHARACTER1
On entry, UPLO specifies whether we should copy the upper part or the lower part of the indicated (sub)matrix:

= 'U':

Copy the upper triangular part.

= 'L':

Copy the lower triangular part.

DIAG

(global input) CHARACTER1
On entry, DIAG specifies whether we should copy the diagonal.

= 'U':

Do NOT copy the diagonal of the (sub)matrix.

= 'N':

Do copy the diagonal of the (sub)matrix.

M

(global input) INTEGER
On entry, M specifies the number of rows of the (sub)matrix to be copied. M 0.

N

(global input) INTEGER
On entry, N specifies the number of columns of the (sub)matrix to be copied. N 0.

A

(local input) REAL/COMPLEX/INTEGER array, dimension (LLD_A,LOCc(JA+N-1))
On entry, the source matrix.

IA

(global input) INTEGER
On entry,the global row index of the beginning of the (sub)matrix of A to copy.
1 IA M_A - M + 1.

JA

(global input) INTEGER
On entry,the global column index of the beginning of the (sub)matrix of A to copy.
1 JA N_A - N + 1.

DESCA

(global and local input) INTEGER array, dimension (DLEN_)
The array descriptor for the distributed matrix A.
Only DESCA(DTYPE_)=1 is supported, and thus DLEN_ = 9.
If the current process is not part of the context of A, then DESCA(CTXT_) must be equal to -1.

B

(local output) REAL/COMPLEX/INTEGER array, dimension (LLD_B,LOCc(JB+N-1))
On exit, the defined (sub)matrix is overwritten by the indicated (sub)matrix from A.

IB

(global input) INTEGER
On entry, the global row index of the beginning of the (sub)matrix of B that will be overwritten.
1 IB M_B - M + 1.

JB

(global input) INTEGER
On entry, the global column index of the beginning of the submatrix of B that will be overwritten.
1 JB N_B - N + 1.

DESCB

(global and local input) INTEGER array, dimension (DLEN_)
The array descriptor for the distributed matrix B.
Only DESCB(DTYPE_)=1 is supported, and thus DLEN_ = 9.
If the calling process is not part of the context of B, then DESCB(CTXT_) must be equal to -1.

ICTXT

(global input) INTEGER
The context encompassing at least the union of all processes in context A and context B. All processes in the context ICTXT must call this routine, even if they do not own a piece of either matrix.