derrpo.f

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      SUBROUTINE derrpo( PATH, NUNIT )
*
      include 'plasmaf.h'
*
*
*  -- LAPACK test routine (version 3.1) --
*     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
*     November 2006
*
*     .. Scalar Arguments ..
      CHARACTER*3        path
      INTEGER            nunit
*     ..
*
*  Purpose
*  =======
*
*  DERRPO tests the error exits for the DOUBLE PRECISION routines
*  for symmetric positive definite matrices.
*
*  Arguments
*  =========
*
*  PATH    (input) CHARACTER*3
*          The LAPACK path name for the routines to be tested.
*
*  NUNIT   (input) INTEGER
*          The unit number for output.
*
*  =====================================================================
*
*     .. Parameters ..
      INTEGER            nmax
      parameter( nmax = 4 )
*     ..
*     .. Local Scalars ..
      CHARACTER*2        c2
      INTEGER            i, info, j
      DOUBLE PRECISION   anrm, rcond
*     ..
*     .. Local Arrays ..
      INTEGER            iw( nmax )
      DOUBLE PRECISION   a( nmax, nmax ), af( nmax, nmax ), b( nmax ),
     $                   r1( nmax ), r2( nmax ), w( 3*nmax ), x( nmax )
*     ..
*     .. External Functions ..
      LOGICAL            lsamen
      EXTERNAL           lsamen
*     ..
*     .. External Subroutines ..
      EXTERNAL           alaesm, chkxer
*     ..
*     .. 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 )
*
*     Disable PLASMA warnings/errors
* 
      CALL plasma_disable( plasma_warnings, info )
      CALL plasma_disable( plasma_errors,   info )
*
*     Set the variables to innocuous values.
*
      DO 20 j = 1, nmax
         DO 10 i = 1, nmax
            a( i, j ) = 1.d0 / dble( i+j )
            af( i, j ) = 1.d0 / dble( i+j )
   10    continue
         b( j ) = 0.d0
         r1( j ) = 0.d0
         r2( j ) = 0.d0
         w( j ) = 0.d0
         x( j ) = 0.d0
         iw( j ) = j
   20 continue
      ok = .true.
*
      IF( lsamen( 2, c2, 'PO' ) ) THEN
*
*        Test error exits of the routines that use the Cholesky
*        decomposition of a symmetric positive definite matrix.
*
*        DPOTRF
*
         srnamt = 'DPOTRF'
         infot = 1
         CALL plasma_dpotrf( '/', 0, a, 1, info )
         CALL chkxer( 'DPOTRF', infot, nout, info, ok )
         infot = 2
         CALL plasma_dpotrf( plasmaupper, -1, a, 1, info )
         CALL chkxer( 'DPOTRF', infot, nout, info, ok )
         infot = 4
         CALL plasma_dpotrf( plasmaupper, 2, a, 1, info )
         CALL chkxer( 'DPOTRF', infot, nout, info, ok )
*
*        DPOTRS
*
         srnamt = 'DPOTRS'
         infot = 1
         CALL plasma_dpotrs( '/', 0, 0, a, 1, b, 1, info )
         CALL chkxer( 'DPOTRS', infot, nout, info, ok )
         infot = 2
         CALL plasma_dpotrs( plasmaupper, -1, 0, a, 1, b, 1, info )
         CALL chkxer( 'DPOTRS', infot, nout, info, ok )
         infot = 3
         CALL plasma_dpotrs( plasmaupper, 0, -1, a, 1, b, 1, info )
         CALL chkxer( 'DPOTRS', infot, nout, info, ok )
         infot = 5
         CALL plasma_dpotrs( plasmaupper, 2, 1, a, 1, b, 2, info )
         CALL chkxer( 'DPOTRS', infot, nout, info, ok )
         infot = 7
         CALL plasma_dpotrs( plasmaupper, 2, 1, a, 2, b, 1, info )
         CALL chkxer( 'DPOTRS', infot, nout, info, ok )
      END IF
*
*     Print a summary line.
*
      CALL alaesm( path, ok, nout )
*
*     Enable PLASMA warnings/errors
* 
      CALL plasma_enable( plasma_warnings, info )
      CALL plasma_enable( plasma_errors,   info )
*
      return
*
*     End of DERRPO
*
      END