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Man Pages
elpa_mult_at_b_real_double(3) FreeBSD Library Functions Manual elpa_mult_at_b_real_double(3)

elpa_mult_at_b_ral_double - Performs C = transpose(A) * B (legacy interface)
 

use elpa1
 
 
success = elpa_mult_at_b_real_double (uplo_a, uplo_c, na, ncb, a, lda, ldaCols, b, ldb, ldbCols, nblk, mpi_comm_rows, mpi_comm_cols, c, ldc, ldcCols)
 
 
With the definitions of the input and output variables:
 
character, intent(in) uplo_a: 'U' if a is upper triangular, 'L' if a is lower triangular, anything else if a is a full matrix
 
character, intent(in) uplo_c: 'U' if only the upper diagonal part of c is needed, 'L' if only the lower diagonal part of c is needed, anything else if the full matrix c is needed
 
integer, intent(in) na: Number of rows/columns of a, number of rows of b and c
 
integer, intent(in) ncb: Number of /columns of b and c
 
real*8, intent(inout) a: locally distributed part of the matrix a. The local dimensions are lda x ldaCols
 
integer, intent(in) lda: leading dimension of locally distributed matrix a
 
integer, intent(in) ldaCols: number of columns of locally distributed matrices a
 
real*8, intent(inout) b: locally distributed part of the matrix b. The local dimensions are ldb x ldbCols
 
integer, intent(in) ldb: leading dimension of locally distributed matrix b
 
integer, intent(in) ldbCols: number of columns of locally distributed matrices b
 
integer, intent(in) nblk: blocksize of cyclic distribution, must be the same in both directions
 
integer, intent(in) mpi_comm_rows: communicator for communication in rows. Constructed with elpa_get_communicators(3)
 
integer, intent(in) mpi_comm_cols: communicator for communication in colums. Constructed with elpa_get_communicators(3)
 
real*8, intent(inout) c: locally distributed part of the matrix c. The local dimensions are ldc x ldcCols
 
integer, intent(in) ldc: leading dimension of locally distributed matrix c
 
integer, intent(in) ldcCols: number of columns of locally distributed matrices c
 
logical success: return value indicating success or failure
 

#include "elpa_legacy.h"
 
int success = elpa_mult_at_b_real_double (char uplo_a, char uplo_c, int na, int ncb, double *a, int lda, int ldaCols, double *b, int ldb, int ldbCols, int nblk, int mpi_comm_rows, int mpi_comm_cols, double *c, int lc, int ldcCols );
 
 
With the definitions of the input and output variables:
 
char uplo_a: 'U' if a is upper triangular, 'L' if a is lower triangular, anything else if a is a full matrix
 
char uplo_c: 'U' if only the upper diagonal part of c is needed, 'L' if only the lower diagonal part of c is needed, anything else if the full matrix c is needed
 
int na: Number of rows/columns of a, number of rows of b and c
 
int ncb: Number of /columns of b and c
 
double * a: locally distributed part of the matrix a. The local dimensions are lda x ldaCols
 
int lda: leading dimension of locally distributed matrix a
 
int ldaCols: number of columns of locally distributed matrices a
 
double * b: locally distributed part of the matrix b. The local dimensions are ldb x ldbCols
 
int ldb: leading dimension of locally distributed matrix b
 
int ldbCols: number of columns of locally distributed matrices b
 
int nblk: blocksize of cyclic distribution, must be the same in both directions
 
int mpi_comm_rows: communicator for communication in rows. Constructed with elpa_get_communicators(3)
 
int mpi_comm_cols: communicator for communication in colums. Constructed with elpa_get_communicators(3)
 
double * c: locally distributed part of the matrix c. The local dimensions are ldc x ldcCols
 
int ldc: leading dimension of locally distributed matrix c
 
int ldcCols: number of columns of locally distributed matrices c
 
int success: return value indicating success (1) or failure (0)

Does c = transpose(a) * b. The ELPA communicators mpi_comm_rows and mpi_comm_cols are obtained with the elpa_get_communicators(3) function.
 
This function is part of the legacy API of the ELPA library. Better use the current API.
 

Old interface: elpa_get_communicators(3) elpa_mult_at_b_real_single(3) elpa_mult_ah_b_complex_single(3) elpa_mult_ah_b_complex_double(3)
 
Current interface: elpa2_print_kernels(1)
Wed May 17 2017 ELPA

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