SUBROUTINE PDLAPRNT( M, N, A, IA, JA, DESCA, IRPRNT, ICPRNT,
$ CMATNM, NOUT, WORK )
*
* -- ScaLAPACK tools routine (version 1.5) --
* University of Tennessee, Knoxville, Oak Ridge National Laboratory,
* and University of California, Berkeley.
* May 1, 1997
*
* .. Scalar Arguments ..
INTEGER IA, ICPRNT, IRPRNT, JA, M, N, NOUT
* ..
* .. Array Arguments ..
CHARACTER*(*) CMATNM
INTEGER DESCA( * )
DOUBLE PRECISION A( * ), WORK( * )
* ..
*
* Purpose
* the BLACS process grid A is distribu- * ted over. The context itself is glo- * bal, but the handle (the integer * value) may vary. * M_A (global) DESCA( M_ ) The number of rows in the global * array A. * N_A (global) DESCA( N_ ) The number of columns in the global * array A. * MB_A (global) DESCA( MB_ ) The blocking factor used to distribute * the rows of the array. * NB_A (global) DESCA( NB_ ) The blocking factor used to distribute * the columns of the array. * RSRC_A (global) DESCA( RSRC_ ) The process row over which the first * row of the array A is distributed. * CSRC_A (global) DESCA( CSRC_ ) The process column over which the * first column of the array A is * distributed. * LLD_A (local) DESCA( LLD_ ) The leading dimension of the local * array. LLD_A >= MAX(1,LOCr(M_A)).
*
* Let K be the number of rows or columns of a distributed matrix,
* and assume that its process grid has dimension p x q.
* LOCr( K ) denotes the number of elements of K that a process
* would receive if K were distributed over the p processes of its
* process column.
* Similarly, LOCc( K ) denotes the number of elements of K that a
* process would receive if K were distributed over the q processes of
* its process row.
* The values of LOCr() and LOCc() may be determined via a call to the
* ScaLAPACK tool function, NUMROC:
* LOCr( M ) = NUMROC( M, MB_A, MYROW, RSRC_A, NPROW ), * LOCc( N ) = NUMROC( N, NB_A, MYCOL, CSRC_A, NPCOL ). * An upper bound for these quantities may be computed by: * LOCr( M ) <= ceil( ceil(M/MB_A)/NPROW )*MB_A * LOCc( N ) <= ceil( ceil(N/NB_A)/NPCOL )*NB_A
*
* Arguments
* M (global input) INTEGER * The number of rows to be operated on i.e the number of rows * of the distributed submatrix sub( A ). M >= 0. * * N (global input) INTEGER * The number of columns to be operated on i.e the number of * columns of the distributed submatrix sub( A ). N >= 0. * * A (local input) DOUBLE PRECISION pointer into the local memory to a * local array of dimension (LLD_A, LOCc(JA+N-1) ) containing * the local pieces of the distributed matrix sub( A ). * * IA (global input) INTEGER * The row index in the global array A indicating the first * row of sub( A ). * * JA (global input) INTEGER * The column index in the global array A indicating the * first column of sub( A ).
*
* DESCA (global and local input) INTEGER array of dimension DLEN_.
* The array descriptor for the distributed matrix A.
*
* IRPRNT (global input) INTEGER
* The row index of the printing process.
*
* ICPRNT (global input) INTEGER
* The column index of the printing process.
*
* CMATNM (global input) CHARACTER*(*)
* Identifier of the distributed matrix to be printed.
*
* NOUT (global input) INTEGER
* The unit number for output file. NOUT = 6, ouput to screen, * NOUT = 0, output to stderr.
*
* WORK (local workspace) DOUBLE PRECISION
* Working array of minimum size equal to MB_A.
*
* .. Parameters ..
INTEGER BLOCK_CYCLIC_2D, CSRC_, CTXT_, DLEN_, DTYPE_,
$ LLD_, MB_, M_, NB_, N_, RSRC_
PARAMETER ( BLOCK_CYCLIC_2D = 1, DLEN_ = 9, DTYPE_ = 1,
$ CTXT_ = 2, M_ = 3, N_ = 4, MB_ = 5, NB_ = 6,
$ RSRC_ = 7, CSRC_ = 8, LLD_ = 9 )
* ..
* .. Local Scalars ..
INTEGER H, I, IACOL, IAROW, IB, ICTXT, ICURCOL,
$ ICURROW, II, IIA, IN, J, JB, JJ, JJA, JN, K,
$ LDA, MYCOL, MYROW, NPCOL, NPROW
* ..
* .. External Subroutines ..
EXTERNAL BLACS_BARRIER, BLACS_GRIDINFO, INFOG2L,
$ DGERV2D, DGESD2D
* ..
* .. External Functions ..
INTEGER ICEIL
EXTERNAL ICEIL
* ..
* .. Intrinsic Functions ..
INTRINSIC MIN
* ..
* .. Executable Statements ..
*
* Get grid parameters
*
ICTXT = DESCA( CTXT_ )
CALL BLACS_GRIDINFO( ICTXT, NPROW, NPCOL, MYROW, MYCOL )
*
CALL INFOG2L( IA, JA, DESCA, NPROW, NPCOL, MYROW, MYCOL,
$ IIA, JJA, IAROW, IACOL )
ICURROW = IAROW
ICURCOL = IACOL
II = IIA
JJ = JJA
LDA = DESCA( LLD_ )
*
* Handle the first block of column separately
*
JN = MIN( ICEIL( JA, DESCA( NB_ ) ) * DESCA( NB_ ), JA+N-1 )
JB = JN-JA+1
DO 60 H = 0, JB-1
IN = MIN( ICEIL( IA, DESCA( MB_ ) ) * DESCA( MB_ ), IA+M-1 )
IB = IN-IA+1
IF( ICURROW.EQ.IRPRNT .AND. ICURCOL.EQ.ICPRNT ) THEN
IF( MYROW.EQ.IRPRNT .AND. MYCOL.EQ.ICPRNT ) THEN
DO 10 K = 0, IB-1
WRITE( NOUT, FMT = 9999 )
$ CMATNM, IA+K, JA+H, A( II+K+(JJ+H-1)*LDA )
10 CONTINUE
END IF
ELSE
IF( MYROW.EQ.ICURROW .AND. MYCOL.EQ.ICURCOL ) THEN
CALL DGESD2D( ICTXT, IB, 1, A( II+(JJ+H-1)*LDA ), LDA,
$ IRPRNT, ICPRNT )
ELSE IF( MYROW.EQ.IRPRNT .AND. MYCOL.EQ.ICPRNT ) THEN
CALL DGERV2D( ICTXT, IB, 1, WORK, DESCA( MB_ ),
$ ICURROW, ICURCOL )
DO 20 K = 1, IB
WRITE( NOUT, FMT = 9999 )
$ CMATNM, IA+K-1, JA+H, WORK( K )
20 CONTINUE
END IF
END IF
IF( MYROW.EQ.ICURROW )
$ II = II + IB
ICURROW = MOD( ICURROW+1, NPROW )
CALL BLACS_BARRIER( ICTXT, 'All' )
*
* Loop over remaining block of rows
*
DO 50 I = IN+1, IA+M-1, DESCA( MB_ )
IB = MIN( DESCA( MB_ ), IA+M-I )
IF( ICURROW.EQ.IRPRNT .AND. ICURCOL.EQ.ICPRNT ) THEN
IF( MYROW.EQ.IRPRNT .AND. MYCOL.EQ.ICPRNT ) THEN
DO 30 K = 0, IB-1
WRITE( NOUT, FMT = 9999 )
$ CMATNM, I+K, JA+H, A( II+K+(JJ+H-1)*LDA )
30 CONTINUE
END IF
ELSE
IF( MYROW.EQ.ICURROW .AND. MYCOL.EQ.ICURCOL ) THEN
CALL DGESD2D( ICTXT, IB, 1, A( II+(JJ+H-1)*LDA ),
$ LDA, IRPRNT, ICPRNT )
ELSE IF( MYROW.EQ.IRPRNT .AND. MYCOL.EQ.ICPRNT ) THEN
CALL DGERV2D( ICTXT, IB, 1, WORK, DESCA( MB_ ),
$ ICURROW, ICURCOL )
DO 40 K = 1, IB
WRITE( NOUT, FMT = 9999 )
$ CMATNM, I+K-1, JA+H, WORK( K )
40 CONTINUE
END IF
END IF
IF( MYROW.EQ.ICURROW )
$ II = II + IB
ICURROW = MOD( ICURROW+1, NPROW )
CALL BLACS_BARRIER( ICTXT, 'All' )
50 CONTINUE
*
II = IIA
ICURROW = IAROW
60 CONTINUE
*
IF( MYCOL.EQ.ICURCOL )
$ JJ = JJ + JB
ICURCOL = MOD( ICURCOL+1, NPCOL )
CALL BLACS_BARRIER( ICTXT, 'All' )
*
* Loop over remaining column blocks
*
DO 130 J = JN+1, JA+N-1, DESCA( NB_ )
JB = MIN( DESCA( NB_ ), JA+N-J )
DO 120 H = 0, JB-1
IN = MIN( ICEIL( IA, DESCA( MB_ ) ) * DESCA( MB_ ), IA+M-1 )
IB = IN-IA+1
IF( ICURROW.EQ.IRPRNT .AND. ICURCOL.EQ.ICPRNT ) THEN
IF( MYROW.EQ.IRPRNT .AND. MYCOL.EQ.ICPRNT ) THEN
DO 70 K = 0, IB-1
WRITE( NOUT, FMT = 9999 )
$ CMATNM, IA+K, J+H, A( II+K+(JJ+H-1)*LDA )
70 CONTINUE
END IF
ELSE
IF( MYROW.EQ.ICURROW .AND. MYCOL.EQ.ICURCOL ) THEN
CALL DGESD2D( ICTXT, IB, 1, A( II+(JJ+H-1)*LDA ),
$ LDA, IRPRNT, ICPRNT )
ELSE IF( MYROW.EQ.IRPRNT .AND. MYCOL.EQ.ICPRNT ) THEN
CALL DGERV2D( ICTXT, IB, 1, WORK, DESCA( MB_ ),
$ ICURROW, ICURCOL )
DO 80 K = 1, IB
WRITE( NOUT, FMT = 9999 )
$ CMATNM, IA+K-1, J+H, WORK( K )
80 CONTINUE
END IF
END IF
IF( MYROW.EQ.ICURROW )
$ II = II + IB
ICURROW = MOD( ICURROW+1, NPROW )
CALL BLACS_BARRIER( ICTXT, 'All' )
*
* Loop over remaining block of rows
*
DO 110 I = IN+1, IA+M-1, DESCA( MB_ )
IB = MIN( DESCA( MB_ ), IA+M-I )
IF( ICURROW.EQ.IRPRNT .AND. ICURCOL.EQ.ICPRNT ) THEN
IF( MYROW.EQ.IRPRNT .AND. MYCOL.EQ.ICPRNT ) THEN
DO 90 K = 0, IB-1
WRITE( NOUT, FMT = 9999 )
$ CMATNM, I+K, J+H, A( II+K+(JJ+H-1)*LDA )
90 CONTINUE
END IF
ELSE
IF( MYROW.EQ.ICURROW .AND. MYCOL.EQ.ICURCOL ) THEN
CALL DGESD2D( ICTXT, IB, 1, A( II+(JJ+H-1)*LDA ),
$ LDA, IRPRNT, ICPRNT )
ELSE IF( MYROW.EQ.IRPRNT .AND. MYCOL.EQ.ICPRNT ) THEN
CALL DGERV2D( ICTXT, IB, 1, WORK, DESCA( MB_ ),
$ ICURROW, ICURCOL )
DO 100 K = 1, IB
WRITE( NOUT, FMT = 9999 )
$ CMATNM, I+K-1, J+H, WORK( K )
100 CONTINUE
END IF
END IF
IF( MYROW.EQ.ICURROW )
$ II = II + IB
ICURROW = MOD( ICURROW+1, NPROW )
CALL BLACS_BARRIER( ICTXT, 'All' )
110 CONTINUE
*
II = IIA
ICURROW = IAROW
120 CONTINUE
*
IF( MYCOL.EQ.ICURCOL )
$ JJ = JJ + JB
ICURCOL = MOD( ICURCOL+1, NPCOL )
CALL BLACS_BARRIER( ICTXT, 'All' )
*
130 CONTINUE
*
9999 FORMAT(A,'(',I6,',',I6,')=',D30.18)
*
RETURN
*
* End of PDLAPRNT
*
END