ddrvrf2.f

Go to the documentation of this file.

*> \brief \b DDRVRF2
*
*  =========== DOCUMENTATION ===========
*
* Online html documentation available at
*            http://www.netlib.org/lapack/explore-html/
*
*  Definition:
*  ===========
*
*       SUBROUTINE DDRVRF2( NOUT, NN, NVAL, A, LDA, ARF, AP, ASAV  )
*
*       .. Scalar Arguments ..
*       INTEGER            LDA, NN, NOUT
*       ..
*       .. Array Arguments ..
*       INTEGER            NVAL( NN )
*       DOUBLE PRECISION   A( LDA, * ), ARF( * ), AP(*), ASAV( LDA, * )
*       ..
*
*
*> \par Purpose:
*  =============
*>
*> \verbatim
*>
*> DDRVRF2 tests the LAPACK RFP conversion routines.
*> \endverbatim
*
*  Arguments:
*  ==========
*
*> \param[in] NOUT
*> \verbatim
*>          NOUT is INTEGER
*>                The unit number for output.
*> \endverbatim
*>
*> \param[in] NN
*> \verbatim
*>          NN is INTEGER
*>                The number of values of N contained in the vector NVAL.
*> \endverbatim
*>
*> \param[in] NVAL
*> \verbatim
*>          NVAL is INTEGER array, dimension (NN)
*>                The values of the matrix dimension N.
*> \endverbatim
*>
*> \param[out] A
*> \verbatim
*>          A is DOUBLE PRECISION array, dimension (LDA,NMAX)
*> \endverbatim
*>
*> \param[in] LDA
*> \verbatim
*>          LDA is INTEGER
*>                The leading dimension of the array A.  LDA >= max(1,NMAX).
*> \endverbatim
*>
*> \param[out] ARF
*> \verbatim
*>          ARF is DOUBLE PRECISION array, dimension ((NMAX*(NMAX+1))/2).
*> \endverbatim
*>
*> \param[out] AP
*> \verbatim
*>          AP is DOUBLE PRECISION array, dimension ((NMAX*(NMAX+1))/2).
*> \endverbatim
*>
*> \param[out] ASAV
*> \verbatim
*>          ASAV is DOUBLE PRECISION array, dimension (LDA,NMAX)
*> \endverbatim
*
*  Authors:
*  ========
*
*> \author Univ. of Tennessee
*> \author Univ. of California Berkeley
*> \author Univ. of Colorado Denver
*> \author NAG Ltd.
*
*> \date December 2016
*
*> \ingroup double_lin
*
*  =====================================================================
      SUBROUTINE ddrvrf2( NOUT, NN, NVAL, A, LDA, ARF, AP, ASAV  )
*
*  -- LAPACK test routine (version 3.7.0) --
*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
*     December 2016
*
*     .. Scalar Arguments ..
      INTEGER            LDA, NN, NOUT
*     ..
*     .. Array Arguments ..
      INTEGER            NVAL( nn )
      DOUBLE PRECISION   A( lda, * ), ARF( * ), AP(*), ASAV( lda, * )
*     ..
*
*  =====================================================================
*     ..
*     .. Local Scalars ..
      LOGICAL            LOWER, OK1, OK2
      CHARACTER          UPLO, CFORM
      INTEGER            I, IFORM, IIN, INFO, IUPLO, J, N,
     +                   nerrs, nrun
*     ..
*     .. Local Arrays ..
      CHARACTER          UPLOS( 2 ), FORMS( 2 )
      INTEGER            ISEED( 4 ), ISEEDY( 4 )
*     ..
*     .. External Functions ..
      DOUBLE PRECISION   DLARND
      EXTERNAL           dlarnd
*     ..
*     .. External Subroutines ..
      EXTERNAL           dtfttr, dtfttp, dtrttf, dtrttp, dtpttr, dtpttf
*     ..
*     .. Scalars in Common ..
      CHARACTER*32       SRNAMT
*     ..
*     .. Common blocks ..
      COMMON             / srnamc / srnamt
*     ..
*     .. Data statements ..
      DATA               iseedy / 1988, 1989, 1990, 1991 /
      DATA               uplos / 'U', 'L' /
      DATA               forms / 'N', 'T' /
*     ..
*     .. Executable Statements ..
*
*     Initialize constants and the random number seed.
*
      nrun = 0
      nerrs = 0
      info = 0
      DO 10 i = 1, 4
         iseed( i ) = iseedy( i )
   10 CONTINUE
*
      DO 120 iin = 1, nn
*
         n = nval( iin )
*
*        Do first for UPLO = 'U', then for UPLO = 'L'
*
         DO 110 iuplo = 1, 2
*
            uplo = uplos( iuplo )
            lower = .true.
            IF ( iuplo.EQ.1 ) lower = .false.
*
*           Do first for CFORM = 'N', then for CFORM = 'T'
*
            DO 100 iform = 1, 2
*
               cform = forms( iform )
*
               nrun = nrun + 1
*
               DO j = 1, n
                  DO i = 1, n
                     a( i, j) = dlarnd( 2, iseed )
                  END DO
               END DO
*
               srnamt = 'DTRTTF'
               CALL dtrttf( cform, uplo, n, a, lda, arf, info )
*
               srnamt = 'DTFTTP'
               CALL dtfttp( cform, uplo, n, arf, ap, info )
*
               srnamt = 'DTPTTR'
               CALL dtpttr( uplo, n, ap, asav, lda, info )
*
               ok1 = .true.
               IF ( lower ) THEN
                  DO j = 1, n
                     DO i = j, n
                        IF ( a(i,j).NE.asav(i,j) ) THEN
                           ok1 = .false.
                        END IF
                     END DO
                  END DO
               ELSE
                  DO j = 1, n
                     DO i = 1, j
                        IF ( a(i,j).NE.asav(i,j) ) THEN
                           ok1 = .false.
                        END IF
                     END DO
                  END DO
               END IF
*
               nrun = nrun + 1
*
               srnamt = 'DTRTTP'
               CALL dtrttp( uplo, n, a, lda, ap, info )
*
               srnamt = 'DTPTTF'
               CALL dtpttf( cform, uplo, n, ap, arf, info )
*
               srnamt = 'DTFTTR'
               CALL dtfttr( cform, uplo, n, arf, asav, lda, info )
*
               ok2 = .true.
               IF ( lower ) THEN
                  DO j = 1, n
                     DO i = j, n
                        IF ( a(i,j).NE.asav(i,j) ) THEN
                           ok2 = .false.
                        END IF
                     END DO
                  END DO
               ELSE
                  DO j = 1, n
                     DO i = 1, j
                        IF ( a(i,j).NE.asav(i,j) ) THEN
                           ok2 = .false.
                        END IF
                     END DO
                  END DO
               END IF
*
               IF (( .NOT.ok1 ).OR.( .NOT.ok2 )) THEN
                  IF( nerrs.EQ.0 ) THEN
                     WRITE( nout, * )
                     WRITE( nout, fmt = 9999 )
                  END IF
                  WRITE( nout, fmt = 9998 ) n, uplo, cform
                  nerrs = nerrs + 1
               END IF
*
  100       CONTINUE
  110    CONTINUE
  120 CONTINUE
*
*     Print a summary of the results.
*
      IF ( nerrs.EQ.0 ) THEN
         WRITE( nout, fmt = 9997 ) nrun
      ELSE
         WRITE( nout, fmt = 9996 ) nerrs, nrun
      END IF
*
 9999 FORMAT( 1x, ' *** Error(s) while testing the RFP conversion',
     +         ' routines ***')
 9998 FORMAT( 1x, '     Error in RFP,conversion routines N=',i5,
     +        ' UPLO=''', a1, ''', FORM =''',a1,'''')
 9997 FORMAT( 1x, 'All tests for the RFP conversion routines passed ( ',
     +        i5,' tests run)')
 9996 FORMAT( 1x, 'RFP conversion routines: ',i5,' out of ',i5,
     +        ' error message recorded')
*
      RETURN
*
*     End of DDRVRF2
*
      END