derrps()

subroutine derrps	(	character*3	path,
		integer	nunit
	)

DERRPS

Purpose:

 DERRPS tests the error exits for the DOUBLE PRECISION routines
 for DPSTRF.

Parameters

[in]	PATH	PATH is CHARACTER*3 The LAPACK path name for the routines to be tested.
[in]	NUNIT	NUNIT is INTEGER The unit number for output.

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 54 of file derrps.f.

*
*  -- 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 ..
      INTEGER            NUNIT
      CHARACTER*3        PATH
*     ..
*
*  =====================================================================
*
*     .. Parameters ..
      INTEGER            NMAX
      parameter( nmax = 4 )
*     ..
*     .. Local Scalars ..
      INTEGER            I, INFO, J, RANK
*     ..
*     .. Local Arrays ..
      DOUBLE PRECISION   A( NMAX, NMAX ), WORK( 2*NMAX )
      INTEGER            PIV( NMAX )
*     ..
*     .. External Subroutines ..
      EXTERNAL           alaesm, chkxer, dpstf2, dpstrf
*     ..
*     .. Scalars in Common ..
      INTEGER            INFOT, NOUT
      LOGICAL            LERR, OK
      CHARACTER*32       SRNAMT
*     ..
*     .. 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 110 j = 1, nmax
         DO 100 i = 1, nmax
            a( i, j ) = 1.d0 / dble( i+j )
*
  100    CONTINUE
         piv( j ) = j
         work( j ) = 0.d0
         work( nmax+j ) = 0.d0
*
  110 CONTINUE
      ok = .true.
*
*
*        Test error exits of the routines that use the Cholesky
*        decomposition of a symmetric positive semidefinite matrix.
*
*        DPSTRF
*
      srnamt = 'DPSTRF'
      infot = 1
      CALL dpstrf( '/', 0, a, 1, piv, rank, -1.d0, work, info )
      CALL chkxer( 'DPSTRF', infot, nout, lerr, ok )
      infot = 2
      CALL dpstrf( 'U', -1, a, 1, piv, rank, -1.d0, work, info )
      CALL chkxer( 'DPSTRF', infot, nout, lerr, ok )
      infot = 4
      CALL dpstrf( 'U', 2, a, 1, piv, rank, -1.d0, work, info )
      CALL chkxer( 'DPSTRF', infot, nout, lerr, ok )
*
*        DPSTF2
*
      srnamt = 'DPSTF2'
      infot = 1
      CALL dpstf2( '/', 0, a, 1, piv, rank, -1.d0, work, info )
      CALL chkxer( 'DPSTF2', infot, nout, lerr, ok )
      infot = 2
      CALL dpstf2( 'U', -1, a, 1, piv, rank, -1.d0, work, info )
      CALL chkxer( 'DPSTF2', infot, nout, lerr, ok )
      infot = 4
      CALL dpstf2( 'U', 2, a, 1, piv, rank, -1.d0, work, info )
      CALL chkxer( 'DPSTF2', infot, nout, lerr, ok )
*
*
*     Print a summary line.
*
      CALL alaesm( path, ok, nout )
*
      RETURN
*
*     End of DERRPS
*

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