Visible to Intel only — GUID: GUID-6668F062-6C50-4AA3-ADC0-2C66D8EDD9BC
Visible to Intel only — GUID: GUID-6668F062-6C50-4AA3-ADC0-2C66D8EDD9BC
p?lacpy
Copies all or part of one two-dimensional array to another.
Syntax
call pslacpy(uplo, m, n, a, ia, ja, desca, b, ib, jb, descb)
call pdlacpy(uplo, m, n, a, ia, ja, desca, b, ib, jb, descb)
call pclacpy(uplo, m, n, a, ia, ja, desca, b, ib, jb, descb)
call pzlacpy(uplo, m, n, a, ia, ja, desca, b, ib, jb, descb)
Description
The p?lacpyroutine copies all or part of a distributed matrix A to another distributed matrix B. No communication is performed, p?lacpy performs a local copy sub(B):= sub(A), where sub(A) denotes A(ia:ia+m-1,ja:ja+n-1) and sub(B) denotes B(ib:ib+m-1,jb:jb+n-1).
Input Parameters
- uplo
-
(global) CHARACTER. Specifies the part of the distributed matrix sub(A) to be copied:
= 'U': Upper triangular part; the strictly lower triangular part of sub(A) is not referenced;
= 'L': Lower triangular part; 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 pslacpy
DOUBLE PRECISION for pdlacpy
COMPLEX for pclacpy
COMPLEX*16 for pzlacpy.
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 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 the matrix 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 A.
Output Parameters
- b
-
(local).
REAL for pslacpy
DOUBLE PRECISION for pdlacpy
COMPLEX for pclacpy
COMPLEX*16 for pzlacpy.
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.