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SUBROUTINE PCLASIZESEPR( DESCA, IPREPAD, IPOSTPAD, SIZEMQRLEFT,
$ SIZEMQRRIGHT, SIZEQRF, SIZETMS, SIZEQTQ,
$ SIZECHK, SIZEHEEVR, RSIZEHEEVR,
$ ISIZEHEEVR, SIZESUBTST, RSIZESUBTST,
$ ISIZESUBTST, SIZETST, RSIZETST,
$ ISIZETST )
*
* -- ScaLAPACK routine (@(MODE)version *TBA*) --
* University of California, Berkeley and
* University of Tennessee, Knoxville.
* October 21, 2006
*
IMPLICIT NONE
*
* .. Scalar Arguments ..
INTEGER IPOSTPAD, IPREPAD, ISIZEHEEVR, ISIZESUBTST,
$ ISIZETST, RSIZEHEEVR, RSIZESUBTST, RSIZETST,
$ SIZECHK, SIZEHEEVR, SIZEMQRLEFT, SIZEMQRRIGHT,
$ SIZEQRF, SIZEQTQ, SIZESUBTST, SIZETMS, SIZETST
* ..
* .. Array Arguments ..
INTEGER DESCA( * )
*
* Purpose
* =======
*
* PCLASIZESEPR computes the amount of memory needed by
* various SEPR test routines, as well as PCHEEVR itself.
*
* Arguments
* =========
*
* DESCA (global input) INTEGER array dimension ( DLEN_ )
* Array descriptor for dense matrix.
*
* SIZEMQRLEFT LWORK for the 1st PCUNMQR call in PCLAGHE
*
* SIZEMQRRIGHT LWORK for the 2nd PCUNMQR call in PCLAGHE
*
* SIZEQRF LWORK for PCGEQRF in PCLAGHE
*
* SIZETMS LWORK for PCLATMS
*
* SIZEQTQ LWORK for PCSEPQTQ
*
* SIZECHK LWORK for PCSEPCHK
*
* SIZEHEEVR LWORK for PCHEEVR
*
* RSIZEHEEVR LRWORK for PCHEEVR
*
* ISIZEHEEVR LIWORK for PCHEEVR
*
* SIZESUBTST LWORK for PCSEPRSUBTST
*
* RSIZESUBTST LRWORK for PCSEPRSUBTST
*
* ISIZESUBTST LIWORK for PCSEPRSUBTST
*
* SIZETST LWORK for PCSEPRTST
*
* RSIZETST LRWORK for PCSEPRTST
*
* ISIZETST LIWORK for PCSEPRTST
*
*
* .. Parameters ..
INTEGER CTXT_, M_,
$ MB_, NB_, RSRC_, CSRC_, LLD_
PARAMETER (
$ CTXT_ = 2, M_ = 3, MB_ = 5, NB_ = 6,
$ RSRC_ = 7, CSRC_ = 8, LLD_ = 9 )
* ..
* .. Local Scalars ..
INTEGER CSRC_A, IACOL, IAROW, ICOFFA, IROFFA, LCM,
$ LCMQ, LDA, MQ0, MYCOL, MYROW, N, NB, NEIG, NN,
$ NNP, NP, NP0, NPCOL, NPROW, NQ, RSRC_A
INTEGER ANB, ICTXT, NHETRD_LWOPT, NPS, SQNPC
* ..
* .. External Functions ..
INTEGER ICEIL, ILCM, INDXG2P, NUMROC
EXTERNAL ICEIL, ILCM, INDXG2P, NUMROC
INTEGER PJLAENV
EXTERNAL PJLAENV
*
* .. External Subroutines ..
EXTERNAL BLACS_GRIDINFO
* ..
* .. Intrinsic Functions ..
INTRINSIC DBLE, INT, MAX, SQRT
* ..
* .. Executable Statements ..
*
N = DESCA( M_ )
NB = DESCA( MB_ )
RSRC_A = DESCA( RSRC_ )
CSRC_A = DESCA( CSRC_ )
*
LDA = DESCA( LLD_ )
CALL BLACS_GRIDINFO( DESCA( CTXT_ ), NPROW, NPCOL, MYROW, MYCOL )
*
LCM = ILCM( NPROW, NPCOL )
LCMQ = LCM / NPCOL
IROFFA = 0
ICOFFA = 0
IAROW = INDXG2P( 1, NB, MYROW, RSRC_A, NPROW )
IACOL = INDXG2P( 1, NB, MYCOL, CSRC_A, NPCOL )
NP = NUMROC( N+IROFFA, NB, MYROW, IAROW, NPROW )
NQ = NUMROC( N+ICOFFA, NB, MYCOL, IACOL, NPCOL )
SIZEMQRLEFT = MAX( ( NB*( NB-1 ) ) / 2, ( NP+NQ )*NB ) + NB*NB
SIZEMQRRIGHT = MAX( ( NB*( NB-1 ) ) / 2,
$ ( NQ+MAX( NP+NUMROC( NUMROC( N+ICOFFA, NB, 0, 0,
$ NPCOL ), NB, 0, 0, LCMQ ), NP ) )*NB ) + NB*NB
SIZEQRF = NB*NP + NB*NQ + NB*NB
SIZETMS = ( LDA+1 )*MAX( 1, NQ ) +
$ MAX( SIZEMQRLEFT, SIZEMQRRIGHT, SIZEQRF )
*
NP0 = NUMROC( N, DESCA( MB_ ), 0, 0, NPROW )
MQ0 = NUMROC( N, DESCA( NB_ ), 0, 0, NPCOL )
SIZEQTQ = 2 + MAX( DESCA( MB_ ), 2 )*( 2*NP0+MQ0 )
SIZECHK = NUMROC( N, DESCA( NB_ ), MYCOL, 0, NPCOL )
*
NEIG = N
NN = MAX( N, NB, 2 ) + 1
NP0 = NUMROC( NN, NB, 0, 0, NPROW )
MQ0 = NUMROC( MAX( NEIG, NB, 2 ), NB, 0, 0, NPCOL )
NNP = MAX( N, NPROW*NPCOL+1, 4 )
*
*
SIZEHEEVR = 1+N + ( NP0+MQ0+NB )*NB
SIZEHEEVR = MAX(3, SIZEHEEVR)
RSIZEHEEVR = 1 + 5*N + MAX( 18*NN, NP0*MQ0+2*NB*NB ) +
$ (2 + ICEIL( NEIG, NPROW*NPCOL ))*NN
RSIZEHEEVR = MAX(3, RSIZEHEEVR)
*
ISIZEHEEVR = 12*NNP + 2*N
*
ICTXT = DESCA( CTXT_ )
ANB = PJLAENV( ICTXT, 3, 'PCHETTRD', 'L', 0, 0, 0, 0 )
SQNPC = INT( SQRT( DBLE( NPROW*NPCOL ) ) )
NPS = MAX( NUMROC( N, 1, 0, 0, SQNPC ), 2*ANB )
NHETRD_LWOPT = 2*( ANB+1 )*( 4*NPS+2 ) + ( NPS+2 )*NPS
SIZEHEEVR = MAX( SIZEHEEVR, N + NHETRD_LWOPT )
*
SIZESUBTST = MAX( SIZETMS, SIZEHEEVR ) +
$ IPREPAD + IPOSTPAD
RSIZESUBTST = MAX( SIZEQTQ, SIZECHK, RSIZEHEEVR ) +
$ IPREPAD + IPOSTPAD
ISIZESUBTST = ISIZEHEEVR + IPREPAD + IPOSTPAD
*
* Allow room for A, COPYA, Z, WORK
*
SIZETST = 3*( LDA*NP+IPREPAD+IPOSTPAD ) + SIZESUBTST
*
* Allow room for DIAG, WIN, WNEW, GAP, RWORK
*
RSIZETST = 4*( N+IPREPAD+IPOSTPAD ) + RSIZESUBTST
*
* Allow room for IFAIL, ICLUSTR, and IWORK
* (only needed for PCHEEVX)
*
ISIZETST = N + 2*NPROW*NPCOL + 2*( IPREPAD+IPOSTPAD ) +
$ ISIZESUBTST
*
*
RETURN
END
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