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SUBROUTINE PSLASIZESEPR( DESCA, IPREPAD, IPOSTPAD, SIZEMQRLEFT,
$ SIZEMQRRIGHT, SIZEQRF, SIZETMS, SIZEQTQ,
$ SIZECHK, SIZESYEVR, ISIZESYEVR,
$ SIZESUBTST, ISIZESUBTST, SIZETST,
$ 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, ISIZESUBTST, ISIZESYEVR,
$ ISIZETST, SIZECHK, SIZEMQRLEFT, SIZEMQRRIGHT,
$ SIZEQRF, SIZEQTQ, SIZESUBTST, SIZESYEVR,
$ SIZETMS, SIZETST
* ..
* .. Array Arguments ..
INTEGER DESCA( * )
*
* Purpose
* =======
*
* PSLASIZESEPR computes the amount of memory needed by
* various SEPR test routines, as well as PSSYEVR itself.
*
* Arguments
* =========
*
* DESCA (global input) INTEGER array dimension ( DLEN_ )
* Array descriptor for dense matrix.
*
* SIZEMQRLEFT LWORK for the 1st PSORMQR call in PSLAGSY
*
* SIZEMQRRIGHT LWORK for the 2nd PSORMQR call in PSLAGSY
*
* SIZEQRF LWORK for PSGEQRF in PSLAGSY
*
* SIZETMS LWORK for PSLATMS
*
* SIZEQTQ LWORK for PSSEPQTQ
*
* SIZECHK LWORK for PSSEPCHK
*
* SIZESYEVR LWORK for PSSYEVR
*
* ISIZESYEVR LIWORK for PSSYEVR
*
* SIZESUBTST LWORK for PSSEPRSUBTST
*
* ISIZESUBTST LIWORK for PSSEPRSUBTST
*
* SIZETST LWORK for PSSEPRTST
*
* ISIZETST LIWORK for PSSEPRTST
*
*
* .. 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
* ..
* .. External Functions ..
INTEGER ICEIL, ILCM, INDXG2P, NUMROC
EXTERNAL ICEIL, ILCM, INDXG2P, NUMROC
*
* .. External Subroutines ..
EXTERNAL BLACS_GRIDINFO
* ..
* .. Intrinsic Functions ..
INTRINSIC MAX
* ..
* .. 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 )
*
*
SIZESYEVR = 1 + 5*N + MAX( 18*NN, NP0*MQ0+2*NB*NB ) +
$ (2 + ICEIL( NEIG, NPROW*NPCOL ))*NN
SIZESYEVR = MAX(3, SIZESYEVR)
*
ISIZESYEVR = 12*NNP + 2*N
*
SIZESUBTST = MAX( SIZETMS, SIZEQTQ, SIZECHK, SIZESYEVR ) +
$ IPREPAD + IPOSTPAD
ISIZESUBTST = ISIZESYEVR + IPREPAD + IPOSTPAD
*
* Allow room for A, COPYA and Z and DIAG, WIN, WNEW, GAP, WORK
*
SIZETST = 3*( LDA*NP+IPREPAD+IPOSTPAD ) +
$ 4*( N+IPREPAD+IPOSTPAD ) + SIZESUBTST
*
* Allow room for IFAIL, ICLUSTR, and IWORK
* (only needed for PSSYEVX)
*
ISIZETST = N + 2*NPROW*NPCOL + 2*( IPREPAD+IPOSTPAD ) +
$ ISIZESUBTST
*
*
RETURN
END
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