derrbd.f

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*> \brief \b DERRBD
*
*  =========== DOCUMENTATION ===========
*
* Online html documentation available at 
*            http://www.netlib.org/lapack/explore-html/ 
*
*  Definition:
*  ===========
*
*       SUBROUTINE DERRBD( PATH, NUNIT )
* 
*       .. Scalar Arguments ..
*       CHARACTER*3        PATH
*       INTEGER            NUNIT
*       ..
*  
*
*> \par Purpose:
*  =============
*>
*> \verbatim
*>
*> DERRBD tests the error exits for DGEBRD, DORGBR, DORMBR, DBDSQR and
*> DBDSDC.
*> \endverbatim
*
*  Arguments:
*  ==========
*
*> \param[in] PATH
*> \verbatim
*>          PATH is CHARACTER*3
*>          The LAPACK path name for the routines to be tested.
*> \endverbatim
*>
*> \param[in] NUNIT
*> \verbatim
*>          NUNIT is INTEGER
*>          The unit number for output.
*> \endverbatim
*
*  Authors:
*  ========
*
*> \author Univ. of Tennessee 
*> \author Univ. of California Berkeley 
*> \author Univ. of Colorado Denver 
*> \author NAG Ltd. 
*
*> \date November 2011
*
*> \ingroup double_eig
*
*  =====================================================================
      SUBROUTINE derrbd( PATH, NUNIT )
*
*  -- LAPACK test routine (version 3.4.0) --
*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
*     November 2011
*
*     .. Scalar Arguments ..
      CHARACTER*3        path
      INTEGER            nunit
*     ..
*
*  =====================================================================
*
*     .. Parameters ..
      INTEGER            nmax, lw
      parameter( nmax = 4, lw = nmax )
*     ..
*     .. Local Scalars ..
      CHARACTER*2        c2
      INTEGER            i, info, j, nt
*     ..
*     .. Local Arrays ..
      INTEGER            iq( nmax, nmax ), iw( nmax )
      DOUBLE PRECISION   a( nmax, nmax ), d( nmax ), e( nmax ),
     $                   q( nmax, nmax ), tp( nmax ), tq( nmax ),
     $                   u( nmax, nmax ), v( nmax, nmax ), w( lw )
*     ..
*     .. External Functions ..
      LOGICAL            lsamen
      EXTERNAL           lsamen
*     ..
*     .. External Subroutines ..
      EXTERNAL           chkxer, dbdsdc, dbdsqr, dgebd2, dgebrd, dorgbr,
     $                   dormbr
*     ..
*     .. Scalars in Common ..
      LOGICAL            lerr, ok
      CHARACTER*32       srnamt
      INTEGER            infot, nout
*     ..
*     .. Common blocks ..
      common             / infoc / infot, nout, ok, lerr
      common             / srnamc / srnamt
*     ..
*     .. Intrinsic Functions ..
      INTRINSIC          dble
*     ..
*     .. Executable Statements ..
*
      nout = nunit
      WRITE( nout, fmt = * )
      c2 = path( 2: 3 )
*
*     Set the variables to innocuous values.
*
      DO 20 j = 1, nmax
         DO 10 i = 1, nmax
            a( i, j ) = 1.d0 / dble( i+j )
   10    continue
   20 continue
      ok = .true.
      nt = 0
*
*     Test error exits of the SVD routines.
*
      IF( lsamen( 2, c2, 'BD' ) ) THEN
*
*        DGEBRD
*
         srnamt = 'DGEBRD'
         infot = 1
         CALL dgebrd( -1, 0, a, 1, d, e, tq, tp, w, 1, info )
         CALL chkxer( 'DGEBRD', infot, nout, lerr, ok )
         infot = 2
         CALL dgebrd( 0, -1, a, 1, d, e, tq, tp, w, 1, info )
         CALL chkxer( 'DGEBRD', infot, nout, lerr, ok )
         infot = 4
         CALL dgebrd( 2, 1, a, 1, d, e, tq, tp, w, 2, info )
         CALL chkxer( 'DGEBRD', infot, nout, lerr, ok )
         infot = 10
         CALL dgebrd( 2, 1, a, 2, d, e, tq, tp, w, 1, info )
         CALL chkxer( 'DGEBRD', infot, nout, lerr, ok )
         nt = nt + 4
*
*        DGEBD2
*
         srnamt = 'DGEBD2'
         infot = 1
         CALL dgebd2( -1, 0, a, 1, d, e, tq, tp, w, info )
         CALL chkxer( 'DGEBD2', infot, nout, lerr, ok )
         infot = 2
         CALL dgebd2( 0, -1, a, 1, d, e, tq, tp, w, info )
         CALL chkxer( 'DGEBD2', infot, nout, lerr, ok )
         infot = 4
         CALL dgebd2( 2, 1, a, 1, d, e, tq, tp, w, info )
         CALL chkxer( 'DGEBD2', infot, nout, lerr, ok )
         nt = nt + 3
*
*        DORGBR
*
         srnamt = 'DORGBR'
         infot = 1
         CALL dorgbr( '/', 0, 0, 0, a, 1, tq, w, 1, info )
         CALL chkxer( 'DORGBR', infot, nout, lerr, ok )
         infot = 2
         CALL dorgbr( 'Q', -1, 0, 0, a, 1, tq, w, 1, info )
         CALL chkxer( 'DORGBR', infot, nout, lerr, ok )
         infot = 3
         CALL dorgbr( 'Q', 0, -1, 0, a, 1, tq, w, 1, info )
         CALL chkxer( 'DORGBR', infot, nout, lerr, ok )
         infot = 3
         CALL dorgbr( 'Q', 0, 1, 0, a, 1, tq, w, 1, info )
         CALL chkxer( 'DORGBR', infot, nout, lerr, ok )
         infot = 3
         CALL dorgbr( 'Q', 1, 0, 1, a, 1, tq, w, 1, info )
         CALL chkxer( 'DORGBR', infot, nout, lerr, ok )
         infot = 3
         CALL dorgbr( 'P', 1, 0, 0, a, 1, tq, w, 1, info )
         CALL chkxer( 'DORGBR', infot, nout, lerr, ok )
         infot = 3
         CALL dorgbr( 'P', 0, 1, 1, a, 1, tq, w, 1, info )
         CALL chkxer( 'DORGBR', infot, nout, lerr, ok )
         infot = 4
         CALL dorgbr( 'Q', 0, 0, -1, a, 1, tq, w, 1, info )
         CALL chkxer( 'DORGBR', infot, nout, lerr, ok )
         infot = 6
         CALL dorgbr( 'Q', 2, 1, 1, a, 1, tq, w, 1, info )
         CALL chkxer( 'DORGBR', infot, nout, lerr, ok )
         infot = 9
         CALL dorgbr( 'Q', 2, 2, 1, a, 2, tq, w, 1, info )
         CALL chkxer( 'DORGBR', infot, nout, lerr, ok )
         nt = nt + 10
*
*        DORMBR
*
         srnamt = 'DORMBR'
         infot = 1
         CALL dormbr( '/', 'L', 'T', 0, 0, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'DORMBR', infot, nout, lerr, ok )
         infot = 2
         CALL dormbr( 'Q', '/', 'T', 0, 0, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'DORMBR', infot, nout, lerr, ok )
         infot = 3
         CALL dormbr( 'Q', 'L', '/', 0, 0, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'DORMBR', infot, nout, lerr, ok )
         infot = 4
         CALL dormbr( 'Q', 'L', 'T', -1, 0, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'DORMBR', infot, nout, lerr, ok )
         infot = 5
         CALL dormbr( 'Q', 'L', 'T', 0, -1, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'DORMBR', infot, nout, lerr, ok )
         infot = 6
         CALL dormbr( 'Q', 'L', 'T', 0, 0, -1, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'DORMBR', infot, nout, lerr, ok )
         infot = 8
         CALL dormbr( 'Q', 'L', 'T', 2, 0, 0, a, 1, tq, u, 2, w, 1,
     $                info )
         CALL chkxer( 'DORMBR', infot, nout, lerr, ok )
         infot = 8
         CALL dormbr( 'Q', 'R', 'T', 0, 2, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'DORMBR', infot, nout, lerr, ok )
         infot = 8
         CALL dormbr( 'P', 'L', 'T', 2, 0, 2, a, 1, tq, u, 2, w, 1,
     $                info )
         CALL chkxer( 'DORMBR', infot, nout, lerr, ok )
         infot = 8
         CALL dormbr( 'P', 'R', 'T', 0, 2, 2, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'DORMBR', infot, nout, lerr, ok )
         infot = 11
         CALL dormbr( 'Q', 'R', 'T', 2, 0, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'DORMBR', infot, nout, lerr, ok )
         infot = 13
         CALL dormbr( 'Q', 'L', 'T', 0, 2, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'DORMBR', infot, nout, lerr, ok )
         infot = 13
         CALL dormbr( 'Q', 'R', 'T', 2, 0, 0, a, 1, tq, u, 2, w, 1,
     $                info )
         CALL chkxer( 'DORMBR', infot, nout, lerr, ok )
         nt = nt + 13
*
*        DBDSQR
*
         srnamt = 'DBDSQR'
         infot = 1
         CALL dbdsqr( '/', 0, 0, 0, 0, d, e, v, 1, u, 1, a, 1, w, info )
         CALL chkxer( 'DBDSQR', infot, nout, lerr, ok )
         infot = 2
         CALL dbdsqr( 'U', -1, 0, 0, 0, d, e, v, 1, u, 1, a, 1, w,
     $                info )
         CALL chkxer( 'DBDSQR', infot, nout, lerr, ok )
         infot = 3
         CALL dbdsqr( 'U', 0, -1, 0, 0, d, e, v, 1, u, 1, a, 1, w,
     $                info )
         CALL chkxer( 'DBDSQR', infot, nout, lerr, ok )
         infot = 4
         CALL dbdsqr( 'U', 0, 0, -1, 0, d, e, v, 1, u, 1, a, 1, w,
     $                info )
         CALL chkxer( 'DBDSQR', infot, nout, lerr, ok )
         infot = 5
         CALL dbdsqr( 'U', 0, 0, 0, -1, d, e, v, 1, u, 1, a, 1, w,
     $                info )
         CALL chkxer( 'DBDSQR', infot, nout, lerr, ok )
         infot = 9
         CALL dbdsqr( 'U', 2, 1, 0, 0, d, e, v, 1, u, 1, a, 1, w, info )
         CALL chkxer( 'DBDSQR', infot, nout, lerr, ok )
         infot = 11
         CALL dbdsqr( 'U', 0, 0, 2, 0, d, e, v, 1, u, 1, a, 1, w, info )
         CALL chkxer( 'DBDSQR', infot, nout, lerr, ok )
         infot = 13
         CALL dbdsqr( 'U', 2, 0, 0, 1, d, e, v, 1, u, 1, a, 1, w, info )
         CALL chkxer( 'DBDSQR', infot, nout, lerr, ok )
         nt = nt + 8
*
*        DBDSDC
*
         srnamt = 'DBDSDC'
         infot = 1
         CALL dbdsdc( '/', 'N', 0, d, e, u, 1, v, 1, q, iq, w, iw,
     $                info )
         CALL chkxer( 'DBDSDC', infot, nout, lerr, ok )
         infot = 2
         CALL dbdsdc( 'U', '/', 0, d, e, u, 1, v, 1, q, iq, w, iw,
     $                info )
         CALL chkxer( 'DBDSDC', infot, nout, lerr, ok )
         infot = 3
         CALL dbdsdc( 'U', 'N', -1, d, e, u, 1, v, 1, q, iq, w, iw,
     $                info )
         CALL chkxer( 'DBDSDC', infot, nout, lerr, ok )
         infot = 7
         CALL dbdsdc( 'U', 'I', 2, d, e, u, 1, v, 1, q, iq, w, iw,
     $                info )
         CALL chkxer( 'DBDSDC', infot, nout, lerr, ok )
         infot = 9
         CALL dbdsdc( 'U', 'I', 2, d, e, u, 2, v, 1, q, iq, w, iw,
     $                info )
         CALL chkxer( 'DBDSDC', infot, nout, lerr, ok )
         nt = nt + 5
      END IF
*
*     Print a summary line.
*
      IF( ok ) THEN
         WRITE( nout, fmt = 9999 )path, nt
      ELSE
         WRITE( nout, fmt = 9998 )path
      END IF
*
 9999 format( 1x, a3, ' routines passed the tests of the error exits',
     $      ' (', i3, ' tests done)' )
 9998 format( ' *** ', a3, ' routines failed the tests of the error ',
     $      'exits ***' )
*
      return
*
*     End of DERRBD
*
      END