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SUBROUTINE PCLAWRITE( FILNAM, M, N, A, IA, JA, DESCA, IRWRIT,
$ ICWRIT, WORK )
*
* -- ScaLAPACK tools routine (version 1.8) --
* University of Tennessee, Knoxville, Oak Ridge National Laboratory,
* and University of California, Berkeley.
*
* written by Antoine Petitet, August 1995 (petitet@cs.utk.edu)
* adapted by Julie Langou, April 2007 (julie@cs.utk.edu)
*
* .. Scalar Arguments ..
INTEGER IA, ICWRIT, IRWRIT, JA, M, N
* ..
* .. Array Arguments ..
CHARACTER*(*) FILNAM
INTEGER DESCA( * )
COMPLEX A( * ), WORK( * )
* ..
*
* Purpose
* =======
*
* PCLAWRITE writes to a file named FILNAMa distributed matrix sub( A )
* denoting A(IA:IA+M-1,JA:JA+N-1). The local pieces are sent to and
* written by the process of coordinates (IRWWRITE, ICWRIT).
*
* WORK must be of size >= MB_ = DESCA( MB_ ).
*
* =====================================================================
*
* .. Parameters ..
INTEGER NOUT
PARAMETER ( NOUT = 13 )
INTEGER BLOCK_CYCLIC_2D, CSRC_, CTXT_, DLEN_, DT_,
$ LLD_, MB_, M_, NB_, N_, RSRC_
PARAMETER ( BLOCK_CYCLIC_2D = 1, DLEN_ = 9, DT_ = 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,
$ CGERV2D, CGESD2D
* ..
* .. External Functions ..
INTEGER ICEIL
EXTERNAL ICEIL
* ..
* .. Intrinsic Functions ..
INTRINSIC AIMAG, REAL, MIN, MOD
* ..
* .. Executable Statements ..
*
* Get grid parameters
*
ICTXT = DESCA( CTXT_ )
CALL BLACS_GRIDINFO( ICTXT, NPROW, NPCOL, MYROW, MYCOL )
*
IF( MYROW.EQ.IRWRIT .AND. MYCOL.EQ.ICWRIT ) THEN
OPEN( NOUT, FILE=FILNAM, STATUS='UNKNOWN' )
WRITE( NOUT, FMT = * ) M, N
END IF
*
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.IRWRIT .AND. ICURCOL.EQ.ICWRIT ) THEN
IF( MYROW.EQ.IRWRIT .AND. MYCOL.EQ.ICWRIT ) THEN
DO 10 K = 0, IB-1
WRITE( NOUT, FMT = 9999 ) A( II+K+(JJ+H-1)*LDA )
10 CONTINUE
END IF
ELSE
IF( MYROW.EQ.ICURROW .AND. MYCOL.EQ.ICURCOL ) THEN
CALL CGESD2D( ICTXT, IB, 1, A( II+(JJ+H-1)*LDA ), LDA,
$ IRWRIT, ICWRIT )
ELSE IF( MYROW.EQ.IRWRIT .AND. MYCOL.EQ.ICWRIT ) THEN
CALL CGERV2D( ICTXT, IB, 1, WORK, DESCA( MB_ ),
$ ICURROW, ICURCOL )
DO 20 K = 1, IB
WRITE( NOUT, FMT = 9999 ) REAL(WORK( K )),
$ AIMAG(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.IRWRIT .AND. ICURCOL.EQ.ICWRIT ) THEN
IF( MYROW.EQ.IRWRIT .AND. MYCOL.EQ.ICWRIT ) THEN
DO 30 K = 0, IB-1
WRITE( NOUT, FMT = 9999 )
$ REAL (A( II+K+(JJ+H-1)*LDA )),
$ AIMAG (A( II+K+(JJ+H-1)*LDA ))
30 CONTINUE
END IF
ELSE
IF( MYROW.EQ.ICURROW .AND. MYCOL.EQ.ICURCOL ) THEN
CALL CGESD2D( ICTXT, IB, 1, A( II+(JJ+H-1)*LDA ),
$ LDA, IRWRIT, ICWRIT )
ELSE IF( MYROW.EQ.IRWRIT .AND. MYCOL.EQ.ICWRIT ) THEN
CALL CGERV2D( ICTXT, IB, 1, WORK, DESCA( MB_ ),
$ ICURROW, ICURCOL )
DO 40 K = 1, IB
WRITE( NOUT, FMT = 9999 ) REAL (WORK( K )),
$ AIMAG (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.IRWRIT .AND. ICURCOL.EQ.ICWRIT ) THEN
IF( MYROW.EQ.IRWRIT .AND. MYCOL.EQ.ICWRIT ) THEN
DO 70 K = 0, IB-1
WRITE( NOUT, FMT = 9999 )
$ REAL (A( II+K+(JJ+H-1)*LDA )),
$ AIMAG (A( II+K+(JJ+H-1)*LDA ))
70 CONTINUE
END IF
ELSE
IF( MYROW.EQ.ICURROW .AND. MYCOL.EQ.ICURCOL ) THEN
CALL CGESD2D( ICTXT, IB, 1, A( II+(JJ+H-1)*LDA ),
$ LDA, IRWRIT, ICWRIT )
ELSE IF( MYROW.EQ.IRWRIT .AND. MYCOL.EQ.ICWRIT ) THEN
CALL CGERV2D( ICTXT, IB, 1, WORK, DESCA( MB_ ),
$ ICURROW, ICURCOL )
DO 80 K = 1, IB
WRITE( NOUT, FMT = 9999 ) REAL (WORK( K )),
$ AIMAG (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.IRWRIT .AND. ICURCOL.EQ.ICWRIT ) THEN
IF( MYROW.EQ.IRWRIT .AND. MYCOL.EQ.ICWRIT ) THEN
DO 90 K = 0, IB-1
WRITE( NOUT, FMT = 9999 )
$ REAL (A( II+K+(JJ+H-1)*LDA )),
$ AIMAG (A( II+K+(JJ+H-1)*LDA ))
90 CONTINUE
END IF
ELSE
IF( MYROW.EQ.ICURROW .AND. MYCOL.EQ.ICURCOL ) THEN
CALL CGESD2D( ICTXT, IB, 1, A( II+(JJ+H-1)*LDA ),
$ LDA, IRWRIT, ICWRIT )
ELSE IF( MYROW.EQ.IRWRIT .AND. MYCOL.EQ.ICWRIT ) THEN
CALL CGERV2D( ICTXT, IB, 1, WORK, DESCA( MB_ ),
$ ICURROW, ICURCOL )
DO 100 K = 1, IB
WRITE( NOUT, FMT = 9999 ) REAL (WORK( K )),
$ AIMAG (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
*
IF( MYROW.EQ.IRWRIT .AND. MYCOL.EQ.ICWRIT ) THEN
CLOSE( NOUT )
END IF
*
9999 FORMAT( D30.18,D30.18 )
*
RETURN
*
* End of PCLAWRITE
*
END
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