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SUBROUTINE SERRGT( PATH, NUNIT )
*
* -- LAPACK test routine (version 3.0) --
* Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd.,
* Courant Institute, Argonne National Lab, and Rice University
* February 29, 1992
*
* .. Scalar Arguments ..
CHARACTER*3 PATH
INTEGER NUNIT
* ..
*
* Purpose
* =======
*
* SERRGT tests the error exits for the REAL tridiagonal
* routines.
*
* 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 = 2 )
* ..
* .. Local Scalars ..
CHARACTER*2 C2
INTEGER INFO
REAL ANORM, RCOND
* ..
* .. Local Arrays ..
INTEGER IP( NMAX ), IW( NMAX )
REAL B( NMAX ), C( NMAX ), CF( NMAX ), D( NMAX ),
$ DF( NMAX ), E( NMAX ), EF( NMAX ), F( NMAX ),
$ R1( NMAX ), R2( NMAX ), W( NMAX ), X( NMAX )
* ..
* .. External Functions ..
LOGICAL LSAMEN
EXTERNAL LSAMEN
* ..
* .. External Subroutines ..
EXTERNAL ALAESM, CHKXER, SGTCON, SGTRFS, SGTTRF, SGTTRS,
$ SPTCON, SPTRFS, SPTTRF, SPTTRS
* ..
* .. Scalars in Common ..
LOGICAL LERR, OK
CHARACTER*6 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 )
D( 1 ) = 1.
D( 2 ) = 2.
DF( 1 ) = 1.
DF( 2 ) = 2.
E( 1 ) = 3.
E( 2 ) = 4.
EF( 1 ) = 3.
EF( 2 ) = 4.
ANORM = 1.0
OK = .TRUE.
*
IF( LSAMEN( 2, C2, 'GT' ) ) THEN
*
* Test error exits for the general tridiagonal routines.
*
* SGTTRF
*
SRNAMT = 'SGTTRF'
INFOT = 1
CALL SGTTRF( -1, C, D, E, F, IP, INFO )
CALL CHKXER( 'SGTTRF', INFOT, NOUT, LERR, OK )
*
* SGTTRS
*
SRNAMT = 'SGTTRS'
INFOT = 1
CALL SGTTRS( '/', 0, 0, C, D, E, F, IP, X, 1, INFO )
CALL CHKXER( 'SGTTRS', INFOT, NOUT, LERR, OK )
INFOT = 2
CALL SGTTRS( 'N', -1, 0, C, D, E, F, IP, X, 1, INFO )
CALL CHKXER( 'SGTTRS', INFOT, NOUT, LERR, OK )
INFOT = 3
CALL SGTTRS( 'N', 0, -1, C, D, E, F, IP, X, 1, INFO )
CALL CHKXER( 'SGTTRS', INFOT, NOUT, LERR, OK )
INFOT = 10
CALL SGTTRS( 'N', 2, 1, C, D, E, F, IP, X, 1, INFO )
CALL CHKXER( 'SGTTRS', INFOT, NOUT, LERR, OK )
*
* SGTRFS
*
SRNAMT = 'SGTRFS'
INFOT = 1
CALL SGTRFS( '/', 0, 0, C, D, E, CF, DF, EF, F, IP, B, 1, X, 1,
$ R1, R2, W, IW, INFO )
CALL CHKXER( 'SGTRFS', INFOT, NOUT, LERR, OK )
INFOT = 2
CALL SGTRFS( 'N', -1, 0, C, D, E, CF, DF, EF, F, IP, B, 1, X,
$ 1, R1, R2, W, IW, INFO )
CALL CHKXER( 'SGTRFS', INFOT, NOUT, LERR, OK )
INFOT = 3
CALL SGTRFS( 'N', 0, -1, C, D, E, CF, DF, EF, F, IP, B, 1, X,
$ 1, R1, R2, W, IW, INFO )
CALL CHKXER( 'SGTRFS', INFOT, NOUT, LERR, OK )
INFOT = 13
CALL SGTRFS( 'N', 2, 1, C, D, E, CF, DF, EF, F, IP, B, 1, X, 2,
$ R1, R2, W, IW, INFO )
CALL CHKXER( 'SGTRFS', INFOT, NOUT, LERR, OK )
INFOT = 15
CALL SGTRFS( 'N', 2, 1, C, D, E, CF, DF, EF, F, IP, B, 2, X, 1,
$ R1, R2, W, IW, INFO )
CALL CHKXER( 'SGTRFS', INFOT, NOUT, LERR, OK )
*
* SGTCON
*
SRNAMT = 'SGTCON'
INFOT = 1
CALL SGTCON( '/', 0, C, D, E, F, IP, ANORM, RCOND, W, IW,
$ INFO )
CALL CHKXER( 'SGTCON', INFOT, NOUT, LERR, OK )
INFOT = 2
CALL SGTCON( 'I', -1, C, D, E, F, IP, ANORM, RCOND, W, IW,
$ INFO )
CALL CHKXER( 'SGTCON', INFOT, NOUT, LERR, OK )
INFOT = 8
CALL SGTCON( 'I', 0, C, D, E, F, IP, -ANORM, RCOND, W, IW,
$ INFO )
CALL CHKXER( 'SGTCON', INFOT, NOUT, LERR, OK )
*
ELSE IF( LSAMEN( 2, C2, 'PT' ) ) THEN
*
* Test error exits for the positive definite tridiagonal
* routines.
*
* SPTTRF
*
SRNAMT = 'SPTTRF'
INFOT = 1
CALL SPTTRF( -1, D, E, INFO )
CALL CHKXER( 'SPTTRF', INFOT, NOUT, LERR, OK )
*
* SPTTRS
*
SRNAMT = 'SPTTRS'
INFOT = 1
CALL SPTTRS( -1, 0, D, E, X, 1, INFO )
CALL CHKXER( 'SPTTRS', INFOT, NOUT, LERR, OK )
INFOT = 2
CALL SPTTRS( 0, -1, D, E, X, 1, INFO )
CALL CHKXER( 'SPTTRS', INFOT, NOUT, LERR, OK )
INFOT = 6
CALL SPTTRS( 2, 1, D, E, X, 1, INFO )
CALL CHKXER( 'SPTTRS', INFOT, NOUT, LERR, OK )
*
* SPTRFS
*
SRNAMT = 'SPTRFS'
INFOT = 1
CALL SPTRFS( -1, 0, D, E, DF, EF, B, 1, X, 1, R1, R2, W, INFO )
CALL CHKXER( 'SPTRFS', INFOT, NOUT, LERR, OK )
INFOT = 2
CALL SPTRFS( 0, -1, D, E, DF, EF, B, 1, X, 1, R1, R2, W, INFO )
CALL CHKXER( 'SPTRFS', INFOT, NOUT, LERR, OK )
INFOT = 8
CALL SPTRFS( 2, 1, D, E, DF, EF, B, 1, X, 2, R1, R2, W, INFO )
CALL CHKXER( 'SPTRFS', INFOT, NOUT, LERR, OK )
INFOT = 10
CALL SPTRFS( 2, 1, D, E, DF, EF, B, 2, X, 1, R1, R2, W, INFO )
CALL CHKXER( 'SPTRFS', INFOT, NOUT, LERR, OK )
*
* SPTCON
*
SRNAMT = 'SPTCON'
INFOT = 1
CALL SPTCON( -1, D, E, ANORM, RCOND, W, INFO )
CALL CHKXER( 'SPTCON', INFOT, NOUT, LERR, OK )
INFOT = 4
CALL SPTCON( 0, D, E, -ANORM, RCOND, W, INFO )
CALL CHKXER( 'SPTCON', INFOT, NOUT, LERR, OK )
END IF
*
* Print a summary line.
*
CALL ALAESM( PATH, OK, NOUT )
*
RETURN
*
* End of SERRGT
*
END
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