zerrbd.f

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*> \brief \b ZERRBD
*
*  =========== DOCUMENTATION ===========
*
* Online html documentation available at
*            http://www.netlib.org/lapack/explore-html/
*
*  Definition:
*  ===========
*
*       SUBROUTINE ZERRBD( PATH, NUNIT )
*
*       .. Scalar Arguments ..
*       CHARACTER*3        PATH
*       INTEGER            NUNIT
*       ..
*
*
*> \par Purpose:
*  =============
*>
*> \verbatim
*>
*> ZERRBD tests the error exits for ZGEBRD, ZUNGBR, ZUNMBR, and ZBDSQR.
*> \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.
*
*> \ingroup complex16_eig
*
*  =====================================================================
      SUBROUTINE zerrbd( PATH, NUNIT )
*
*  -- LAPACK test routine --
*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
*
*     .. 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 ..
      DOUBLE PRECISION   D( NMAX ), E( NMAX ), RW( 4*NMAX )
      COMPLEX*16         A( NMAX, NMAX ), TP( NMAX ), TQ( NMAX ),
     $                   U( NMAX, NMAX ), V( NMAX, NMAX ), W( LW )
*     ..
*     .. External Functions ..
      LOGICAL            LSAMEN
      EXTERNAL           lsamen
*     ..
*     .. External Subroutines ..
      EXTERNAL           chkxer, zbdsqr, zgebrd, zungbr, zunmbr
*     ..
*     .. 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
*
*        ZGEBRD
*
         srnamt = 'ZGEBRD'
         infot = 1
         CALL zgebrd( -1, 0, a, 1, d, e, tq, tp, w, 1, info )
         CALL chkxer( 'ZGEBRD', infot, nout, lerr, ok )
         infot = 2
         CALL zgebrd( 0, -1, a, 1, d, e, tq, tp, w, 1, info )
         CALL chkxer( 'ZGEBRD', infot, nout, lerr, ok )
         infot = 4
         CALL zgebrd( 2, 1, a, 1, d, e, tq, tp, w, 2, info )
         CALL chkxer( 'ZGEBRD', infot, nout, lerr, ok )
         infot = 10
         CALL zgebrd( 2, 1, a, 2, d, e, tq, tp, w, 1, info )
         CALL chkxer( 'ZGEBRD', infot, nout, lerr, ok )
         nt = nt + 4
*
*        ZUNGBR
*
         srnamt = 'ZUNGBR'
         infot = 1
         CALL zungbr( '/', 0, 0, 0, a, 1, tq, w, 1, info )
         CALL chkxer( 'ZUNGBR', infot, nout, lerr, ok )
         infot = 2
         CALL zungbr( 'Q', -1, 0, 0, a, 1, tq, w, 1, info )
         CALL chkxer( 'ZUNGBR', infot, nout, lerr, ok )
         infot = 3
         CALL zungbr( 'Q', 0, -1, 0, a, 1, tq, w, 1, info )
         CALL chkxer( 'ZUNGBR', infot, nout, lerr, ok )
         infot = 3
         CALL zungbr( 'Q', 0, 1, 0, a, 1, tq, w, 1, info )
         CALL chkxer( 'ZUNGBR', infot, nout, lerr, ok )
         infot = 3
         CALL zungbr( 'Q', 1, 0, 1, a, 1, tq, w, 1, info )
         CALL chkxer( 'ZUNGBR', infot, nout, lerr, ok )
         infot = 3
         CALL zungbr( 'P', 1, 0, 0, a, 1, tq, w, 1, info )
         CALL chkxer( 'ZUNGBR', infot, nout, lerr, ok )
         infot = 3
         CALL zungbr( 'P', 0, 1, 1, a, 1, tq, w, 1, info )
         CALL chkxer( 'ZUNGBR', infot, nout, lerr, ok )
         infot = 4
         CALL zungbr( 'Q', 0, 0, -1, a, 1, tq, w, 1, info )
         CALL chkxer( 'ZUNGBR', infot, nout, lerr, ok )
         infot = 6
         CALL zungbr( 'Q', 2, 1, 1, a, 1, tq, w, 1, info )
         CALL chkxer( 'ZUNGBR', infot, nout, lerr, ok )
         infot = 9
         CALL zungbr( 'Q', 2, 2, 1, a, 2, tq, w, 1, info )
         CALL chkxer( 'ZUNGBR', infot, nout, lerr, ok )
         nt = nt + 10
*
*        ZUNMBR
*
         srnamt = 'ZUNMBR'
         infot = 1
         CALL zunmbr( '/', 'L', 'T', 0, 0, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'ZUNMBR', infot, nout, lerr, ok )
         infot = 2
         CALL zunmbr( 'Q', '/', 'T', 0, 0, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'ZUNMBR', infot, nout, lerr, ok )
         infot = 3
         CALL zunmbr( 'Q', 'L', '/', 0, 0, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'ZUNMBR', infot, nout, lerr, ok )
         infot = 4
         CALL zunmbr( 'Q', 'L', 'C', -1, 0, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'ZUNMBR', infot, nout, lerr, ok )
         infot = 5
         CALL zunmbr( 'Q', 'L', 'C', 0, -1, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'ZUNMBR', infot, nout, lerr, ok )
         infot = 6
         CALL zunmbr( 'Q', 'L', 'C', 0, 0, -1, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'ZUNMBR', infot, nout, lerr, ok )
         infot = 8
         CALL zunmbr( 'Q', 'L', 'C', 2, 0, 0, a, 1, tq, u, 2, w, 1,
     $                info )
         CALL chkxer( 'ZUNMBR', infot, nout, lerr, ok )
         infot = 8
         CALL zunmbr( 'Q', 'R', 'C', 0, 2, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'ZUNMBR', infot, nout, lerr, ok )
         infot = 8
         CALL zunmbr( 'P', 'L', 'C', 2, 0, 2, a, 1, tq, u, 2, w, 1,
     $                info )
         CALL chkxer( 'ZUNMBR', infot, nout, lerr, ok )
         infot = 8
         CALL zunmbr( 'P', 'R', 'C', 0, 2, 2, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'ZUNMBR', infot, nout, lerr, ok )
         infot = 11
         CALL zunmbr( 'Q', 'R', 'C', 2, 0, 0, a, 1, tq, u, 1, w, 1,
     $                info )
         CALL chkxer( 'ZUNMBR', infot, nout, lerr, ok )
         infot = 13
         CALL zunmbr( 'Q', 'L', 'C', 0, 2, 0, a, 1, tq, u, 1, w, 0,
     $                info )
         CALL chkxer( 'ZUNMBR', infot, nout, lerr, ok )
         infot = 13
         CALL zunmbr( 'Q', 'R', 'C', 2, 0, 0, a, 1, tq, u, 2, w, 0,
     $                info )
         CALL chkxer( 'ZUNMBR', infot, nout, lerr, ok )
         nt = nt + 13
*
*        ZBDSQR
*
         srnamt = 'ZBDSQR'
         infot = 1
         CALL zbdsqr( '/', 0, 0, 0, 0, d, e, v, 1, u, 1, a, 1, rw,
     $                info )
         CALL chkxer( 'ZBDSQR', infot, nout, lerr, ok )
         infot = 2
         CALL zbdsqr( 'U', -1, 0, 0, 0, d, e, v, 1, u, 1, a, 1, rw,
     $                info )
         CALL chkxer( 'ZBDSQR', infot, nout, lerr, ok )
         infot = 3
         CALL zbdsqr( 'U', 0, -1, 0, 0, d, e, v, 1, u, 1, a, 1, rw,
     $                info )
         CALL chkxer( 'ZBDSQR', infot, nout, lerr, ok )
         infot = 4
         CALL zbdsqr( 'U', 0, 0, -1, 0, d, e, v, 1, u, 1, a, 1, rw,
     $                info )
         CALL chkxer( 'ZBDSQR', infot, nout, lerr, ok )
         infot = 5
         CALL zbdsqr( 'U', 0, 0, 0, -1, d, e, v, 1, u, 1, a, 1, rw,
     $                info )
         CALL chkxer( 'ZBDSQR', infot, nout, lerr, ok )
         infot = 9
         CALL zbdsqr( 'U', 2, 1, 0, 0, d, e, v, 1, u, 1, a, 1, rw,
     $                info )
         CALL chkxer( 'ZBDSQR', infot, nout, lerr, ok )
         infot = 11
         CALL zbdsqr( 'U', 0, 0, 2, 0, d, e, v, 1, u, 1, a, 1, rw,
     $                info )
         CALL chkxer( 'ZBDSQR', infot, nout, lerr, ok )
         infot = 13
         CALL zbdsqr( 'U', 2, 0, 0, 1, d, e, v, 1, u, 1, a, 1, rw,
     $                info )
         CALL chkxer( 'ZBDSQR', infot, nout, lerr, ok )
         nt = nt + 8
      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 ZERRBD
*
      END