derrqrt.f

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*> \brief \b DERRQRT
*
*  =========== DOCUMENTATION ===========
*
* Online html documentation available at 
*            http://www.netlib.org/lapack/explore-html/ 
*
*  Definition:
*  ===========
*
*       SUBROUTINE DERRQRT( PATH, NUNIT )
* 
*       .. Scalar Arguments ..
*       CHARACTER*3        PATH
*       INTEGER            NUNIT
*       ..
*  
*
*> \par Purpose:
*  =============
*>
*> \verbatim
*>
*> DERRQRT tests the error exits for the DOUBLE PRECISION routines
*> that use the QRT decomposition of a general matrix.
*> \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_lin
*
*  =====================================================================
      SUBROUTINE derrqrt( PATH, NUNIT )
      IMPLICIT NONE
*
*  -- 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
      parameter                ( nmax = 2 )
*     ..
*     .. Local Scalars ..
      INTEGER            I, INFO, J
*     ..
*     .. Local Arrays ..
      DOUBLE PRECISION   A( nmax, nmax ), T( nmax, nmax ), W( nmax ),
     $                   c( nmax, nmax )
*     ..
*     .. External Subroutines ..
      EXTERNAL           alaesm, chkxer, dgeqrt2, dgeqrt3, dgeqrt,
     $                   dgemqrt 
*     ..
*     .. 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 = * )
*
*     Set the variables to innocuous values.
*
      DO j = 1, nmax
         DO i = 1, nmax
            a( i, j ) = 1.d0 / dble( i+j )
            c( i, j ) = 1.d0 / dble( i+j )
            t( i, j ) = 1.d0 / dble( i+j )
         END DO
         w( j ) = 0.d0
      END DO
      ok = .true.
*
*     Error exits for QRT factorization
*
*     DGEQRT
*
      srnamt = 'DGEQRT'
      infot = 1
      CALL dgeqrt( -1, 0, 1, a, 1, t, 1, w, info )
      CALL chkxer( 'DGEQRT', infot, nout, lerr, ok )
      infot = 2
      CALL dgeqrt( 0, -1, 1, a, 1, t, 1, w, info )
      CALL chkxer( 'DGEQRT', infot, nout, lerr, ok )
      infot = 3
      CALL dgeqrt( 0, 0, 0, a, 1, t, 1, w, info )
      CALL chkxer( 'DGEQRT', infot, nout, lerr, ok )
      infot = 5
      CALL dgeqrt( 2, 1, 1, a, 1, t, 1, w, info )
      CALL chkxer( 'DGEQRT', infot, nout, lerr, ok )
      infot = 7
      CALL dgeqrt( 2, 2, 2, a, 2, t, 1, w, info )
      CALL chkxer( 'DGEQRT', infot, nout, lerr, ok )
*
*     DGEQRT2
*
      srnamt = 'DGEQRT2'
      infot = 1
      CALL dgeqrt2( -1, 0, a, 1, t, 1, info )
      CALL chkxer( 'DGEQRT2', infot, nout, lerr, ok )
      infot = 2
      CALL dgeqrt2( 0, -1, a, 1, t, 1, info )
      CALL chkxer( 'DGEQRT2', infot, nout, lerr, ok )
      infot = 4
      CALL dgeqrt2( 2, 1, a, 1, t, 1, info )
      CALL chkxer( 'DGEQRT2', infot, nout, lerr, ok )
      infot = 6
      CALL dgeqrt2( 2, 2, a, 2, t, 1, info )
      CALL chkxer( 'DGEQRT2', infot, nout, lerr, ok )
*
*     DGEQRT3
*
      srnamt = 'DGEQRT3'
      infot = 1
      CALL dgeqrt3( -1, 0, a, 1, t, 1, info )
      CALL chkxer( 'DGEQRT3', infot, nout, lerr, ok )
      infot = 2
      CALL dgeqrt3( 0, -1, a, 1, t, 1, info )
      CALL chkxer( 'DGEQRT3', infot, nout, lerr, ok )
      infot = 4
      CALL dgeqrt3( 2, 1, a, 1, t, 1, info )
      CALL chkxer( 'DGEQRT3', infot, nout, lerr, ok )
      infot = 6
      CALL dgeqrt3( 2, 2, a, 2, t, 1, info )
      CALL chkxer( 'DGEQRT3', infot, nout, lerr, ok )
*
*     DGEMQRT
*
      srnamt = 'DGEMQRT'
      infot = 1
      CALL dgemqrt( '/', 'N', 0, 0, 0, 1, a, 1, t, 1, c, 1, w, info )
      CALL chkxer( 'DGEMQRT', infot, nout, lerr, ok )
      infot = 2
      CALL dgemqrt( 'L', '/', 0, 0, 0, 1, a, 1, t, 1, c, 1, w, info )
      CALL chkxer( 'DGEMQRT', infot, nout, lerr, ok )
      infot = 3
      CALL dgemqrt( 'L', 'N', -1, 0, 0, 1, a, 1, t, 1, c, 1, w, info )
      CALL chkxer( 'DGEMQRT', infot, nout, lerr, ok )
      infot = 4
      CALL dgemqrt( 'L', 'N', 0, -1, 0, 1, a, 1, t, 1, c, 1, w, info )
      CALL chkxer( 'DGEMQRT', infot, nout, lerr, ok )
      infot = 5
      CALL dgemqrt( 'L', 'N', 0, 0, -1, 1, a, 1, t, 1, c, 1, w, info )
      CALL chkxer( 'DGEMQRT', infot, nout, lerr, ok )
      infot = 5
      CALL dgemqrt( 'R', 'N', 0, 0, -1, 1, a, 1, t, 1, c, 1, w, info )
      CALL chkxer( 'DGEMQRT', infot, nout, lerr, ok )
      infot = 6
      CALL dgemqrt( 'L', 'N', 0, 0, 0, 0, a, 1, t, 1, c, 1, w, info )
      CALL chkxer( 'DGEMQRT', infot, nout, lerr, ok )
      infot = 8
      CALL dgemqrt( 'R', 'N', 1, 2, 1, 1, a, 1, t, 1, c, 1, w, info )
      CALL chkxer( 'DGEMQRT', infot, nout, lerr, ok )
      infot = 8
      CALL dgemqrt( 'L', 'N', 2, 1, 1, 1, a, 1, t, 1, c, 1, w, info )
      CALL chkxer( 'DGEMQRT', infot, nout, lerr, ok )
      infot = 10
      CALL dgemqrt( 'R', 'N', 1, 1, 1, 1, a, 1, t, 0, c, 1, w, info )
      CALL chkxer( 'DGEMQRT', infot, nout, lerr, ok )
      infot = 12
      CALL dgemqrt( 'L', 'N', 1, 1, 1, 1, a, 1, t, 1, c, 0, w, info )
      CALL chkxer( 'DGEMQRT', infot, nout, lerr, ok )
*
*     Print a summary line.
*
      CALL alaesm( path, ok, nout )
*
      RETURN
*
*     End of DERRQRT
*
      END