Visible to Intel only — GUID: GUID-52AE0608-BF9F-4943-8CA6-FF45575AA6C5
Visible to Intel only — GUID: GUID-52AE0608-BF9F-4943-8CA6-FF45575AA6C5
p?geadd
Performs sum operation for two distributed general matrices.
Syntax
call psgeadd(trans, m, n, alpha, a, ia, ja, desca, beta, c, ic, jc, descc)
call pdgeadd(trans, m, n, alpha, a, ia, ja, desca, beta, c, ic, jc, descc)
call pcgeadd(trans, m, n, alpha, a, ia, ja, desca, beta, c, ic, jc, descc)
call pzgeadd(trans, m, n, alpha, a, ia, ja, desca, beta, c, ic, jc, descc)
Include Files
- mkl_pblas.h
Description
The p?geadd routines perform sum operation for two distributed general matrices. The operation is defined as
sub(C):=beta*sub(C) + alpha*op(sub(A)),
where:
op(x) is one of op(x) = x, or op(x) = x',
alpha and beta are scalars,
sub(C) is an m-by-n distributed matrix, sub(C)=C(ic:ic+m-1, jc:jc+n-1).
sub(A) is a distributed matrix, sub(A)=A(ia:ia+n-1, ja:ja+m-1).
Input Parameters
- trans
-
(global) CHARACTER*1. Specifies the operation:
if trans = 'N' or 'n', then op(sub(A)) := sub(A);
if trans = 'T' or 't', then op(sub(A)) := sub(A)';
if trans = 'C' or 'c', then op(sub(A)) := sub(A)'.
- m
-
(global) INTEGER. Specifies the number of rows of the distributed matrix sub(C) and the number of columns of the submatrix sub(A), m≥ 0.
- n
-
(global) INTEGER. Specifies the number of columns of the distributed matrix sub(C) and the number of rows of the submatrix sub(A), n≥ 0.
- alpha
-
(global)REAL for psgeadd
DOUBLE PRECISION for pdgeadd
COMPLEX for pcgeadd
DOUBLE COMPLEX for pzgeadd
Specifies the scalar alpha.
- a
-
(local)REAL for psgeadd
DOUBLE PRECISION for pdgeadd
COMPLEX for pcgeadd
DOUBLE COMPLEX for pzgeadd
Array, size (lld_a, LOCq(ja+m-1)). This array contains the local pieces of the distributed matrix sub(A).
- ia, ja
-
(global) INTEGER. The row and column indices in the distributed matrix A indicating the first row and the first column of the submatrix sub(A), respectively.
- desca
-
(global and local) INTEGER array of dimension 9. The array descriptor of the distributed matrix A.
- beta
-
(global)REAL for psgeadd
DOUBLE PRECISION for pdgeadd
COMPLEX for pcgeadd
DOUBLE COMPLEX for pzgeadd
Specifies the scalar beta.
When beta is equal to zero, then sub(C) need not be set on input.
- c
-
(local)REAL for psgeadd
DOUBLE PRECISION for pdgeadd
COMPLEX for pcgeadd
DOUBLE COMPLEX for pzgeadd
Array, size (lld_c, LOCq(jc+n-1)).
This array contains the local pieces of the distributed matrix sub(C).
- ic, jc
-
(global) INTEGER. The row and column indices in the distributed matrix C indicating the first row and the first column of the submatrix sub(C), respectively.
- descc
-
(global and local) INTEGER array of dimension 9. The array descriptor of the distributed matrix C.
Output Parameters
- c
-
Overwritten by the updated submatrix.