cerrgt.f

Go to the documentation of this file.

*> \brief \b CERRGT
*
*  =========== DOCUMENTATION ===========
*
* Online html documentation available at 
*            http://www.netlib.org/lapack/explore-html/ 
*
*  Definition:
*  ===========
*
*       SUBROUTINE CERRGT( PATH, NUNIT )
* 
*       .. Scalar Arguments ..
*       CHARACTER*3        PATH
*       INTEGER            NUNIT
*       ..
*  
*
*> \par Purpose:
*  =============
*>
*> \verbatim
*>
*> CERRGT tests the error exits for the COMPLEX tridiagonal
*> routines.
*> \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 complex_lin
*
*  =====================================================================
      SUBROUTINE cerrgt( PATH, NUNIT )
*
*  -- 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 ..
      CHARACTER*2        C2
      INTEGER            I, INFO
      REAL               ANORM, RCOND
*     ..
*     .. Local Arrays ..
      INTEGER            IP( nmax )
      REAL               D( nmax ), DF( nmax ), R1( nmax ), R2( nmax ),
     $                   rw( nmax )
      COMPLEX            B( nmax ), DL( nmax ), DLF( nmax ), DU( nmax ),
     $                   du2( nmax ), duf( nmax ), e( nmax ),
     $                   ef( nmax ), w( nmax ), x( nmax )
*     ..
*     .. External Functions ..
      LOGICAL            LSAMEN
      EXTERNAL           lsamen
*     ..
*     .. External Subroutines ..
      EXTERNAL           alaesm, cgtcon, cgtrfs, cgttrf, cgttrs, chkxer,
     $                   cptcon, cptrfs, cpttrf, cpttrs
*     ..
*     .. Scalars in Common ..
      LOGICAL            LERR, OK
      CHARACTER*32       SRNAMT
      INTEGER            INFOT, NOUT
*     ..
*     .. Common blocks ..
      COMMON             / infoc / infot, nout, ok, lerr
      COMMON             / srnamc / srnamt
*     ..
*     .. Executable Statements ..
*
      nout = nunit
      WRITE( nout, fmt = * )
      c2 = path( 2: 3 )
      DO 10 i = 1, nmax
         d( i ) = 1.
         e( i ) = 2.
         dl( i ) = 3.
         du( i ) = 4.
   10 CONTINUE
      anorm = 1.0
      ok = .true.
*
      IF( lsamen( 2, c2, 'GT' ) ) THEN
*
*        Test error exits for the general tridiagonal routines.
*
*        CGTTRF
*
         srnamt = 'CGTTRF'
         infot = 1
         CALL cgttrf( -1, dl, e, du, du2, ip, info )
         CALL chkxer( 'CGTTRF', infot, nout, lerr, ok )
*
*        CGTTRS
*
         srnamt = 'CGTTRS'
         infot = 1
         CALL cgttrs( '/', 0, 0, dl, e, du, du2, ip, x, 1, info )
         CALL chkxer( 'CGTTRS', infot, nout, lerr, ok )
         infot = 2
         CALL cgttrs( 'N', -1, 0, dl, e, du, du2, ip, x, 1, info )
         CALL chkxer( 'CGTTRS', infot, nout, lerr, ok )
         infot = 3
         CALL cgttrs( 'N', 0, -1, dl, e, du, du2, ip, x, 1, info )
         CALL chkxer( 'CGTTRS', infot, nout, lerr, ok )
         infot = 10
         CALL cgttrs( 'N', 2, 1, dl, e, du, du2, ip, x, 1, info )
         CALL chkxer( 'CGTTRS', infot, nout, lerr, ok )
*
*        CGTRFS
*
         srnamt = 'CGTRFS'
         infot = 1
         CALL cgtrfs( '/', 0, 0, dl, e, du, dlf, ef, duf, du2, ip, b, 1,
     $                x, 1, r1, r2, w, rw, info )
         CALL chkxer( 'CGTRFS', infot, nout, lerr, ok )
         infot = 2
         CALL cgtrfs( 'N', -1, 0, dl, e, du, dlf, ef, duf, du2, ip, b,
     $                1, x, 1, r1, r2, w, rw, info )
         CALL chkxer( 'CGTRFS', infot, nout, lerr, ok )
         infot = 3
         CALL cgtrfs( 'N', 0, -1, dl, e, du, dlf, ef, duf, du2, ip, b,
     $                1, x, 1, r1, r2, w, rw, info )
         CALL chkxer( 'CGTRFS', infot, nout, lerr, ok )
         infot = 13
         CALL cgtrfs( 'N', 2, 1, dl, e, du, dlf, ef, duf, du2, ip, b, 1,
     $                x, 2, r1, r2, w, rw, info )
         CALL chkxer( 'CGTRFS', infot, nout, lerr, ok )
         infot = 15
         CALL cgtrfs( 'N', 2, 1, dl, e, du, dlf, ef, duf, du2, ip, b, 2,
     $                x, 1, r1, r2, w, rw, info )
         CALL chkxer( 'CGTRFS', infot, nout, lerr, ok )
*
*        CGTCON
*
         srnamt = 'CGTCON'
         infot = 1
         CALL cgtcon( '/', 0, dl, e, du, du2, ip, anorm, rcond, w,
     $                info )
         CALL chkxer( 'CGTCON', infot, nout, lerr, ok )
         infot = 2
         CALL cgtcon( 'I', -1, dl, e, du, du2, ip, anorm, rcond, w,
     $                info )
         CALL chkxer( 'CGTCON', infot, nout, lerr, ok )
         infot = 8
         CALL cgtcon( 'I', 0, dl, e, du, du2, ip, -anorm, rcond, w,
     $                info )
         CALL chkxer( 'CGTCON', infot, nout, lerr, ok )
*
      ELSE IF( lsamen( 2, c2, 'PT' ) ) THEN
*
*        Test error exits for the positive definite tridiagonal
*        routines.
*
*        CPTTRF
*
         srnamt = 'CPTTRF'
         infot = 1
         CALL cpttrf( -1, d, e, info )
         CALL chkxer( 'CPTTRF', infot, nout, lerr, ok )
*
*        CPTTRS
*
         srnamt = 'CPTTRS'
         infot = 1
         CALL cpttrs( '/', 1, 0, d, e, x, 1, info )
         CALL chkxer( 'CPTTRS', infot, nout, lerr, ok )
         infot = 2
         CALL cpttrs( 'U', -1, 0, d, e, x, 1, info )
         CALL chkxer( 'CPTTRS', infot, nout, lerr, ok )
         infot = 3
         CALL cpttrs( 'U', 0, -1, d, e, x, 1, info )
         CALL chkxer( 'CPTTRS', infot, nout, lerr, ok )
         infot = 7
         CALL cpttrs( 'U', 2, 1, d, e, x, 1, info )
         CALL chkxer( 'CPTTRS', infot, nout, lerr, ok )
*
*        CPTRFS
*
         srnamt = 'CPTRFS'
         infot = 1
         CALL cptrfs( '/', 1, 0, d, e, df, ef, b, 1, x, 1, r1, r2, w,
     $                rw, info )
         CALL chkxer( 'CPTRFS', infot, nout, lerr, ok )
         infot = 2
         CALL cptrfs( 'U', -1, 0, d, e, df, ef, b, 1, x, 1, r1, r2, w,
     $                rw, info )
         CALL chkxer( 'CPTRFS', infot, nout, lerr, ok )
         infot = 3
         CALL cptrfs( 'U', 0, -1, d, e, df, ef, b, 1, x, 1, r1, r2, w,
     $                rw, info )
         CALL chkxer( 'CPTRFS', infot, nout, lerr, ok )
         infot = 9
         CALL cptrfs( 'U', 2, 1, d, e, df, ef, b, 1, x, 2, r1, r2, w,
     $                rw, info )
         CALL chkxer( 'CPTRFS', infot, nout, lerr, ok )
         infot = 11
         CALL cptrfs( 'U', 2, 1, d, e, df, ef, b, 2, x, 1, r1, r2, w,
     $                rw, info )
         CALL chkxer( 'CPTRFS', infot, nout, lerr, ok )
*
*        CPTCON
*
         srnamt = 'CPTCON'
         infot = 1
         CALL cptcon( -1, d, e, anorm, rcond, rw, info )
         CALL chkxer( 'CPTCON', infot, nout, lerr, ok )
         infot = 4
         CALL cptcon( 0, d, e, -anorm, rcond, rw, info )
         CALL chkxer( 'CPTCON', infot, nout, lerr, ok )
      END IF
*
*     Print a summary line.
*
      CALL alaesm( path, ok, nout )
*
      RETURN
*
*     End of CERRGT
*
      END