Visible to Intel only — GUID: GUID-EE4926F5-8A98-44C6-B6E7-05FA7627EBC5
Visible to Intel only — GUID: GUID-EE4926F5-8A98-44C6-B6E7-05FA7627EBC5
p?lacp2
Copies all or part of a distributed matrix to another distributed matrix.
Syntax
call pslacp2(uplo, m, n, a, ia, ja, desca, b, ib, jb, descb)
call pdlacp2(uplo, m, n, a, ia, ja, desca, b, ib, jb, descb)
call pclacp2(uplo, m, n, a, ia, ja, desca, b, ib, jb, descb)
call pzlacp2(uplo, m, n, a, ia, ja, desca, b, ib, jb, descb)
Description
The p?lacp2routine copies all or part of a distributed matrix A to another distributed matrix B. No communication is performed, p?lacp2 performs a local copy sub(A):= sub(B), where sub(A) denotes A(ia:ia+m-1, a:ja+n-1) and sub(B) denotes B(ib:ib+m-1, jb:jb+n-1).
p?lacp2 requires that only dimension of the matrix operands is distributed.
Input Parameters
- uplo
-
(global) CHARACTER. Specifies the part of the distributed matrix sub(A) to be copied:
= 'U': Upper triangular part is copied; the strictly lower triangular part of sub(A) is not referenced;
= 'L': Lower triangular part is copied; the strictly upper triangular part of sub(A) is not referenced.
Otherwise: all of the matrix sub(A) is copied.
- m
-
(global) INTEGER.
The number of rows in the distributed matrix sub(A). (m ≥ 0).
- n
-
(global) INTEGER.
The number of columns in the distributed matrix sub(A). (n ≥ 0).
- a
-
(local).
REAL for pslacp2
DOUBLE PRECISION for pdlacp2
COMPLEX for pclacp2
COMPLEX*16 for pzlacp2.
Pointer into the local memory to an array of size(lld_a, LOCc(ja+n-1)).
On entry, this array contains the local pieces of the m-by-n distributed matrix sub(A).
- ia, ja
-
(global) INTEGER. The row and column indices in the global matrix A indicating the first row and the first column of sub(A), respectively.
- desca
-
(global and local) INTEGER array of size dlen_. The array descriptor for the distributed matrix A.
- ib, jb
-
(global) INTEGER. The row and column indices in the global matrix B indicating the first row and the first column of sub(B), respectively.
- descb
-
(global and local) INTEGER array of size dlen_. The array descriptor for the distributed matrix B.
Output Parameters
- b
-
(local).
REAL for pslacp2
DOUBLE PRECISION for pdlacp2
COMPLEX for pclacp2
COMPLEX*16 for pzlacp2.
Pointer into the local memory to an array of size (lld_b, LOCc(jb+n-1)). This array contains on exit the local pieces of the distributed matrix sub( B ) set as follows:
if uplo = 'U', B(ib+i-1, jb+j-1) = A(ia+i-1, ja+j-1), 1≤i≤j, 1≤j≤n;
if uplo = 'L', B(ib+i-1, jb+j-1) = A(ia+i-1, ja+j-1), j≤i≤m, 1≤j≤n;
otherwise, B(ib+i-1, jb+j-1) = A(ia+i-1, ja+j-1), 1≤i≤m, 1≤j≤n.