dbcomm - matrix multiply
SUBROUTINE DBCOMM( TRANSA, MB, N, KB, ALPHA, DESCRA, * VAL, BINDX, BJNDX, BNNZ, LB, * B, LDB, BETA, C, LDC, WORK, LWORK) INTEGER TRANSA, MB, N, KB, DESCRA(5), BNNZ, LB, * LDB, LDC, LWORK INTEGER BINDX(BNNZ), BJNDX(BNNZ) DOUBLE PRECISION ALPHA, BETA DOUBLE PRECISION VAL(LB*LB*BNNZ), B(LDB,*), C(LDC,*), WORK(LWORK) SUBROUTINE DBCOMM_64( TRANSA, MB, N, KB, ALPHA, DESCRA, * VAL, BINDX, BJNDX, BNNZ, LB, * B, LDB, BETA, C, LDC, WORK, LWORK) INTEGER*8 TRANSA, MB, N, KB, DESCRA(5), BNNZ, LB, * LDB, LDC, LWORK INTEGER*8 BINDX(BNNZ), BJNDX(BNNZ) DOUBLE PRECISION ALPHA, BETA DOUBLE PRECISION VAL(LB*LB*BNNZ), B(LDB,*), C(LDC,*), WORK(LWORK) F95 INTERFACE SUBROUTINE BCOMM(TRANSA,MB,N,KB,ALPHA,DESCRA,VAL,BINDX, BJNDX, * BNNZ, LB, B, LDB, BETA, C,LDC, WORK, LWORK) INTEGER TRANSA, MB, N, KB, BNNZ, LB INTEGER, DIMENSION(:) :: DESCRA, BINDX, BJNDX DOUBLE PRECISION ALPHA, BETA DOUBLE PRECISION, DIMENSION(:) :: VAL DOUBLE PRECISION, DIMENSION(:, :) :: B, C SUBROUTINE BCOMM_64(TRANSA,MB,N,KB,ALPHA,DESCRA,VAL,BINDX, BJNDX, * BNNZ, LB, B, LDB, BETA, C,LDC, WORK, LWORK) INTEGER*8 TRANSA, MB, N, KB, BNNZ, LB INTEGER*8, DIMENSION(:) :: DESCRA, BINDX, BJNDX DOUBLE PRECISION ALPHA, BETA DOUBLE PRECISION, DIMENSION(:) :: VAL DOUBLE PRECISION, DIMENSION(:, :) :: B, C C INTERFACE #include <sunperf.h> void dbcomm (const int transa, const int mb, const int n, const int kb, const double alpha, const int* descra, const double* val, const int* bindx, const int* bjndx, const int bnnz, const int lb, const double* b, const int ldb, const double beta, dou- ble* c, const int ldc); void dbcomm_64 (const long transa, const long mb, const long n, const long kb, const double alpha, const long* descra, const dou- ble* val, const long* bindx, const long* bjndx, const long bnnz, const long lb, const double* b, const long ldb, const double beta, double* c, const long ldc);
Oracle Solaris Studio Performance Library dbcomm(3P)
NAME
dbcomm - block coordinate matrix-matrix multiply
SYNOPSIS
SUBROUTINE DBCOMM( TRANSA, MB, N, KB, ALPHA, DESCRA,
* VAL, BINDX, BJNDX, BNNZ, LB,
* B, LDB, BETA, C, LDC, WORK, LWORK)
INTEGER TRANSA, MB, N, KB, DESCRA(5), BNNZ, LB,
* LDB, LDC, LWORK
INTEGER BINDX(BNNZ), BJNDX(BNNZ)
DOUBLE PRECISION ALPHA, BETA
DOUBLE PRECISION VAL(LB*LB*BNNZ), B(LDB,*), C(LDC,*), WORK(LWORK)
SUBROUTINE DBCOMM_64( TRANSA, MB, N, KB, ALPHA, DESCRA,
* VAL, BINDX, BJNDX, BNNZ, LB,
* B, LDB, BETA, C, LDC, WORK, LWORK)
INTEGER*8 TRANSA, MB, N, KB, DESCRA(5), BNNZ, LB,
* LDB, LDC, LWORK
INTEGER*8 BINDX(BNNZ), BJNDX(BNNZ)
DOUBLE PRECISION ALPHA, BETA
DOUBLE PRECISION VAL(LB*LB*BNNZ), B(LDB,*), C(LDC,*), WORK(LWORK)
F95 INTERFACE
SUBROUTINE BCOMM(TRANSA,MB,N,KB,ALPHA,DESCRA,VAL,BINDX, BJNDX,
* BNNZ, LB, B, LDB, BETA, C,LDC, WORK, LWORK)
INTEGER TRANSA, MB, N, KB, BNNZ, LB
INTEGER, DIMENSION(:) :: DESCRA, BINDX, BJNDX
DOUBLE PRECISION ALPHA, BETA
DOUBLE PRECISION, DIMENSION(:) :: VAL
DOUBLE PRECISION, DIMENSION(:, :) :: B, C
SUBROUTINE BCOMM_64(TRANSA,MB,N,KB,ALPHA,DESCRA,VAL,BINDX, BJNDX,
* BNNZ, LB, B, LDB, BETA, C,LDC, WORK, LWORK)
INTEGER*8 TRANSA, MB, N, KB, BNNZ, LB
INTEGER*8, DIMENSION(:) :: DESCRA, BINDX, BJNDX
DOUBLE PRECISION ALPHA, BETA
DOUBLE PRECISION, DIMENSION(:) :: VAL
DOUBLE PRECISION, DIMENSION(:, :) :: B, C
C INTERFACE
#include <sunperf.h>
void dbcomm (const int transa, const int mb, const int n, const int kb,
const double alpha, const int* descra, const double* val,
const int* bindx, const int* bjndx, const int bnnz, const int
lb, const double* b, const int ldb, const double beta, dou-
ble* c, const int ldc);
void dbcomm_64 (const long transa, const long mb, const long n, const
long kb, const double alpha, const long* descra, const dou-
ble* val, const long* bindx, const long* bjndx, const long
bnnz, const long lb, const double* b, const long ldb, const
double beta, double* c, const long ldc);
DESCRIPTION
dbcomm performs one of the matrix-matrix operations
C <- alpha op(A) B + beta C
where op( A ) is one of
op( A ) = A or op( A ) = A' or op( A ) = conjg( A' )
( ' indicates matrix transpose),
A is an (mb*lb) by (kb*lb) sparse matrix represented in the block
coordinate format, alpha and beta are scalars, C and B are dense
matrices.
ARGUMENTS
TRANSA(input) On entry, integer TRANSA specifies the form
of op( A ) to be used in the matrix
multiplication as follows:
0 : operate with matrix
1 : operate with transpose matrix
2 : operate with the conjugate transpose of matrix.
2 is equivalent to 1 if matrix is real.
Unchanged on exit.
MB(input) On entry, integer MB specifies the number of block rows
in the matrix A. Unchanged on exit.
N(input) On entry, N specifies the number of columns
in the matrix C. Unchanged on exit.
KB(input) On entry, integer KB specifies the number of block
columns in the matrix A. Unchanged on exit.
ALPHA(input) On entry, ALPHA specifies the scalar alpha.
Unchanged on exit.
DESCRA (input) Descriptor argument. Five element integer array:
DESCRA(1) matrix structure
0 : general
1 : symmetric (A=A')
2 : Hermitian (A= CONJG(A'))
3 : Triangular
4 : Skew(Anti)-Symmetric (A=-A')
5 : Diagonal
6 : Skew-Hermitian (A= -CONJG(A'))
DESCRA(2) upper/lower triangular indicator
1 : lower
2 : upper
DESCRA(3) main block diagonal type
0 : non-unit
1 : unit
DESCRA(4) Array base (NOT IMPLEMENTED)
0 : C/C++ compatible
1 : Fortran compatible
DESCRA(5) repeated indices? (NOT IMPLEMENTED)
0 : unknown
1 : no repeated indices
VAL(input) On entry, VAL is a scalar array of length
LB*LB*BNNZ consisting of the non-zero block
entries of A, in any order. Each block
is stored in standard column-major form.
Unchanged on exit.
BINDX(input) On entry, BINDX is an integer array of length BNNZ
consisting of the block row indices of the non-zero
block entries of A. Unchanged on exit.
BJNDX(input) On entry, BJNDX is an integer array of length BNNZ
consisting of the block column indices of the non-zero
block entries of A. Unchanged on exit.
BNNZ (input) On entry, integer BNNZ specifies the number of nonzero
block entries in A. Unchanged on exit.
LB (input) On entry, integer LB specifies the dimension of dense
blocks composing A. Unchanged on exit.
B (input) Array of DIMENSION ( LDB, N ).
Before entry with TRANSA = 0, the leading kb*lb by n
part of the array B must contain the matrix B, otherwise
the leading mb*lb by n part of the array B must contain the
matrix B. Unchanged on exit.
LDB (input) On entry, LDB specifies the first dimension of B as declared
in the calling (sub) program. Unchanged on exit.
BETA (input) On entry, BETA specifies the scalar beta. Unchanged on exit.
C(input/output) Array of DIMENSION ( LDC, N ).
Before entry with TRANSA = 0, the leading mb*lb by n
part of the array C must contain the matrix C, otherwise
the leading kb*lb by n part of the array C must contain the
matrix C. On exit, the array C is overwritten by the matrix
( alpha*op( A )* B + beta*C ).
LDC (input) On entry, LDC specifies the first dimension of C as declared
in the calling (sub) program. Unchanged on exit.
WORK (is not referenced in the current version)
LWORK (is not referenced in the current version)
SEE ALSO
Libsunperf SPARSE BLAS is fully parallel and compatible with NIST FOR-
TRAN Sparse Blas but the sources are different. Libsunperf SPARSE BLAS
is free of bugs found in NIST FORTRAN Sparse Blas. Besides several new
features and routines are implemented.
NIST FORTRAN Sparse Blas User's Guide available at:
http://math.nist.gov/mcsd/Staff/KRemington/fspblas/
Based on the standard proposed in
"Document for the Basic Linear Algebra Subprograms (BLAS) Standard",
University of Tennessee, Knoxville, Tennessee, 1996:
http://www.netlib.org/utk/papers/sparse.ps
The routine is designed so that it provides a possibility to use just
one sparse matrix representation of a general matrix A for computing
matrix-matrix multiply for another sparse matrix composed by block
triangles and/or the main block diagonal of A. The full description of
the feature for block entry formats is given in section NOTES/BUGS for
the sbcomm manpage.
3rd Berkeley Distribution 7 Nov 2015 dbcomm(3P)