zerrgt.f

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*> \brief \b ZERRGT
*
*  =========== DOCUMENTATION ===========
*
* Online html documentation available at
*            http://www.netlib.org/lapack/explore-html/
*
*  Definition:
*  ===========
*
*       SUBROUTINE ZERRGT( PATH, NUNIT )
*
*       .. Scalar Arguments ..
*       CHARACTER*3        PATH
*       INTEGER            NUNIT
*       ..
*
*
*> \par Purpose:
*  =============
*>
*> \verbatim
*>
*> ZERRGT tests the error exits for the COMPLEX*16 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.
*
*> \ingroup complex16_lin
*
*  =====================================================================
      SUBROUTINE zerrgt( PATH, NUNIT )
*
*  -- 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 ..
      CHARACTER*3        PATH
      INTEGER            NUNIT
*     ..
*
*  =====================================================================
*
*     .. Parameters ..
      INTEGER            NMAX
      parameter( nmax = 2 )
*     ..
*     .. Local Scalars ..
      CHARACTER*2        C2
      INTEGER            I, INFO
      DOUBLE PRECISION   ANORM, RCOND
*     ..
*     .. Local Arrays ..
      INTEGER            IP( NMAX )
      DOUBLE PRECISION   D( NMAX ), DF( NMAX ), R1( NMAX ), R2( NMAX ),
     $                   RW( NMAX )
      COMPLEX*16         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, chkxer, zgtcon, zgtrfs, zgttrf, zgttrs,
     $                   zptcon, zptrfs, zpttrf, zpttrs
*     ..
*     .. 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.d0
         e( i ) = 2.d0
         dl( i ) = 3.d0
         du( i ) = 4.d0
   10 CONTINUE
      anorm = 1.0d0
      ok = .true.
*
      IF( lsamen( 2, c2, 'GT' ) ) THEN
*
*        Test error exits for the general tridiagonal routines.
*
*        ZGTTRF
*
         srnamt = 'ZGTTRF'
         infot = 1
         CALL zgttrf( -1, dl, e, du, du2, ip, info )
         CALL chkxer( 'ZGTTRF', infot, nout, lerr, ok )
*
*        ZGTTRS
*
         srnamt = 'ZGTTRS'
         infot = 1
         CALL zgttrs( '/', 0, 0, dl, e, du, du2, ip, x, 1, info )
         CALL chkxer( 'ZGTTRS', infot, nout, lerr, ok )
         infot = 2
         CALL zgttrs( 'N', -1, 0, dl, e, du, du2, ip, x, 1, info )
         CALL chkxer( 'ZGTTRS', infot, nout, lerr, ok )
         infot = 3
         CALL zgttrs( 'N', 0, -1, dl, e, du, du2, ip, x, 1, info )
         CALL chkxer( 'ZGTTRS', infot, nout, lerr, ok )
         infot = 10
         CALL zgttrs( 'N', 2, 1, dl, e, du, du2, ip, x, 1, info )
         CALL chkxer( 'ZGTTRS', infot, nout, lerr, ok )
*
*        ZGTRFS
*
         srnamt = 'ZGTRFS'
         infot = 1
         CALL zgtrfs( '/', 0, 0, dl, e, du, dlf, ef, duf, du2, ip, b, 1,
     $                x, 1, r1, r2, w, rw, info )
         CALL chkxer( 'zgtrfs', INFOT, NOUT, LERR, OK )
         INFOT = 2
         CALL ZGTRFS( 'n', -1, 0, DL, E, DU, DLF, EF, DUF, DU2, IP, B,
     $                1, X, 1, R1, R2, W, RW, INFO )
         CALL CHKXER( 'zgtrfs', INFOT, NOUT, LERR, OK )
         INFOT = 3
         CALL ZGTRFS( 'n', 0, -1, DL, E, DU, DLF, EF, DUF, DU2, IP, B,
     $                1, X, 1, R1, R2, W, RW, INFO )
         CALL CHKXER( 'zgtrfs', INFOT, NOUT, LERR, OK )
         INFOT = 13
         CALL ZGTRFS( 'n', 2, 1, DL, E, DU, DLF, EF, DUF, DU2, IP, B, 1,
     $                X, 2, R1, R2, W, RW, INFO )
         CALL CHKXER( 'zgtrfs', INFOT, NOUT, LERR, OK )
         INFOT = 15
         CALL ZGTRFS( 'n', 2, 1, DL, E, DU, DLF, EF, DUF, DU2, IP, B, 2,
     $                X, 1, R1, R2, W, RW, INFO )
         CALL CHKXER( 'zgtrfs', INFOT, NOUT, LERR, OK )
*
*        ZGTCON
*
         SRNAMT = 'zgtcon'
         INFOT = 1
         CALL ZGTCON( '/', 0, DL, E, DU, DU2, IP, ANORM, RCOND, W,
     $                INFO )
         CALL CHKXER( 'zgtcon', INFOT, NOUT, LERR, OK )
         INFOT = 2
         CALL ZGTCON( 'i', -1, DL, E, DU, DU2, IP, ANORM, RCOND, W,
     $                INFO )
         CALL CHKXER( 'zgtcon', INFOT, NOUT, LERR, OK )
         INFOT = 8
         CALL ZGTCON( 'i', 0, DL, E, DU, DU2, IP, -ANORM, RCOND, W,
     $                INFO )
         CALL CHKXER( 'zgtcon', INFOT, NOUT, LERR, OK )
*
      ELSE IF( LSAMEN( 2, C2, 'pt' ) ) THEN
*
*        Test error exits for the positive definite tridiagonal
*        routines.
*
*        ZPTTRF
*
         SRNAMT = 'zpttrf'
         INFOT = 1
         CALL ZPTTRF( -1, D, E, INFO )
         CALL CHKXER( 'zpttrf', INFOT, NOUT, LERR, OK )
*
*        ZPTTRS
*
         SRNAMT = 'zpttrs'
         infot = 1
         CALL zpttrs( '/', 1, 0, d, e, x, 1, info )
         CALL chkxer( 'ZPTTRS', infot, nout, lerr, ok )
         infot = 2
         CALL zpttrs( 'U', -1, 0, d, e, x, 1, info )
         CALL chkxer( 'ZPTTRS', infot, nout, lerr, ok )
         infot = 3
         CALL zpttrs( 'U', 0, -1, d, e, x, 1, info )
         CALL chkxer( 'ZPTTRS', infot, nout, lerr, ok )
         infot = 7
         CALL zpttrs( 'U', 2, 1, d, e, x, 1, info )
         CALL chkxer( 'ZPTTRS', infot, nout, lerr, ok )
*
*        ZPTRFS
*
         srnamt = 'ZPTRFS'
         infot = 1
         CALL zptrfs( '/', 1, 0, d, e, df, ef, b, 1, x, 1, r1, r2, w,
     $                rw, info )
         CALL chkxer( 'ZPTRFS', infot, nout, lerr, ok )
         infot = 2
         CALL zptrfs( 'U', -1, 0, d, e, df, ef, b, 1, x, 1, r1, r2, w,
     $                rw, info )
         CALL chkxer( 'ZPTRFS', infot, nout, lerr, ok )
         infot = 3
         CALL zptrfs( 'u', 0, -1, D, E, DF, EF, B, 1, X, 1, R1, R2, W,
     $                RW, INFO )
         CALL CHKXER( 'zptrfs', INFOT, NOUT, LERR, OK )
         INFOT = 9
         CALL ZPTRFS( 'u', 2, 1, D, E, DF, EF, B, 1, X, 2, R1, R2, W,
     $                RW, INFO )
         CALL CHKXER( 'zptrfs', INFOT, NOUT, LERR, OK )
         INFOT = 11
         CALL ZPTRFS( 'u', 2, 1, D, E, DF, EF, B, 2, X, 1, R1, R2, W,
     $                RW, INFO )
         CALL CHKXER( 'zptrfs', INFOT, NOUT, LERR, OK )
*
*        ZPTCON
*
         SRNAMT = 'zptcon'
         INFOT = 1
         CALL ZPTCON( -1, D, E, ANORM, RCOND, RW, INFO )
         CALL CHKXER( 'zptcon', INFOT, NOUT, LERR, OK )
         INFOT = 4
         CALL ZPTCON( 0, D, E, -ANORM, RCOND, RW, INFO )
         CALL CHKXER( 'zptcon', INFOT, NOUT, LERR, OK )
      END IF
*
*     Print a summary line.
*
      CALL ALAESM( PATH, OK, NOUT )
*
      RETURN
*
*     End of ZERRGT
*
      END