1*> \brief \b SERRLQT
2*
3*  =========== DOCUMENTATION ===========
4*
5* Online html documentation available at
6*            http://www.netlib.org/lapack/explore-html/
7*
8*  Definition:
9*  ===========
10*
11*       SUBROUTINE SERRLQT( PATH, NUNIT )
12*
13*       .. Scalar Arguments ..
14*       CHARACTER*3        PATH
15*       INTEGER            NUNIT
16*       ..
17*
18*
19*> \par Purpose:
20*  =============
21*>
22*> \verbatim
23*>
24*> DERRLQT tests the error exits for the DOUBLE PRECISION routines
25*> that use the LQT decomposition of a general matrix.
26*> \endverbatim
27*
28*  Arguments:
29*  ==========
30*
31*> \param[in] PATH
32*> \verbatim
33*>          PATH is CHARACTER*3
34*>          The LAPACK path name for the routines to be tested.
35*> \endverbatim
36*>
37*> \param[in] NUNIT
38*> \verbatim
39*>          NUNIT is INTEGER
40*>          The unit number for output.
41*> \endverbatim
42*
43*  Authors:
44*  ========
45*
46*> \author Univ. of Tennessee
47*> \author Univ. of California Berkeley
48*> \author Univ. of Colorado Denver
49*> \author NAG Ltd.
50*
51*> \ingroup double_lin
52*
53*  =====================================================================
54      SUBROUTINE SERRLQT( PATH, NUNIT )
55      IMPLICIT NONE
56*
57*  -- LAPACK test routine --
58*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
59*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
60*
61*     .. Scalar Arguments ..
62      CHARACTER*3        PATH
63      INTEGER            NUNIT
64*     ..
65*
66*  =====================================================================
67*
68*     .. Parameters ..
69      INTEGER            NMAX
70      PARAMETER          ( NMAX = 2 )
71*     ..
72*     .. Local Scalars ..
73      INTEGER            I, INFO, J
74*     ..
75*     .. Local Arrays ..
76      REAL               A( NMAX, NMAX ), T( NMAX, NMAX ), W( NMAX ),
77     $                   C( NMAX, NMAX )
78*     ..
79*     .. External Subroutines ..
80      EXTERNAL           ALAESM, CHKXER, SGELQT3, SGELQT,
81     $                   SGEMLQT
82*     ..
83*     .. Scalars in Common ..
84      LOGICAL            LERR, OK
85      CHARACTER*32       SRNAMT
86      INTEGER            INFOT, NOUT
87*     ..
88*     .. Common blocks ..
89      COMMON             / INFOC / INFOT, NOUT, OK, LERR
90      COMMON             / SRNAMC / SRNAMT
91*     ..
92*     .. Intrinsic Functions ..
93      INTRINSIC          REAL
94*     ..
95*     .. Executable Statements ..
96*
97      NOUT = NUNIT
98      WRITE( NOUT, FMT = * )
99*
100*     Set the variables to innocuous values.
101*
102      DO J = 1, NMAX
103         DO I = 1, NMAX
104            A( I, J ) = 1.D0 / REAL( I+J )
105            C( I, J ) = 1.D0 / REAL( I+J )
106            T( I, J ) = 1.D0 / REAL( I+J )
107         END DO
108         W( J ) = 0.D0
109      END DO
110      OK = .TRUE.
111*
112*     Error exits for LQT factorization
113*
114*     SGELQT
115*
116      SRNAMT = 'SGELQT'
117      INFOT = 1
118      CALL SGELQT( -1, 0, 1, A, 1, T, 1, W, INFO )
119      CALL CHKXER( 'SGELQT', INFOT, NOUT, LERR, OK )
120      INFOT = 2
121      CALL SGELQT( 0, -1, 1, A, 1, T, 1, W, INFO )
122      CALL CHKXER( 'SGELQT', INFOT, NOUT, LERR, OK )
123      INFOT = 3
124      CALL SGELQT( 0, 0, 0, A, 1, T, 1, W, INFO )
125      CALL CHKXER( 'SGELQT', INFOT, NOUT, LERR, OK )
126      INFOT = 5
127      CALL SGELQT( 2, 1, 1, A, 1, T, 1, W, INFO )
128      CALL CHKXER( 'SGELQT', INFOT, NOUT, LERR, OK )
129      INFOT = 7
130      CALL SGELQT( 2, 2, 2, A, 2, T, 1, W, INFO )
131      CALL CHKXER( 'SGELQT', INFOT, NOUT, LERR, OK )
132*
133*     SGELQT3
134*
135      SRNAMT = 'SGELQT3'
136      INFOT = 1
137      CALL SGELQT3( -1, 0, A, 1, T, 1, INFO )
138      CALL CHKXER( 'SGELQT3', INFOT, NOUT, LERR, OK )
139      INFOT = 2
140      CALL SGELQT3( 0, -1, A, 1, T, 1, INFO )
141      CALL CHKXER( 'SGELQT3', INFOT, NOUT, LERR, OK )
142      INFOT = 4
143      CALL SGELQT3( 2, 2, A, 1, T, 1, INFO )
144      CALL CHKXER( 'SGELQT3', INFOT, NOUT, LERR, OK )
145      INFOT = 6
146      CALL SGELQT3( 2, 2, A, 2, T, 1, INFO )
147      CALL CHKXER( 'SGELQT3', INFOT, NOUT, LERR, OK )
148*
149*     SGEMLQT
150*
151      SRNAMT = 'SGEMLQT'
152      INFOT = 1
153      CALL SGEMLQT( '/', 'N', 0, 0, 0, 1, A, 1, T, 1, C, 1, W, INFO )
154      CALL CHKXER( 'SGEMLQT', INFOT, NOUT, LERR, OK )
155      INFOT = 2
156      CALL SGEMLQT( 'L', '/', 0, 0, 0, 1, A, 1, T, 1, C, 1, W, INFO )
157      CALL CHKXER( 'SGEMLQT', INFOT, NOUT, LERR, OK )
158      INFOT = 3
159      CALL SGEMLQT( 'L', 'N', -1, 0, 0, 1, A, 1, T, 1, C, 1, W, INFO )
160      CALL CHKXER( 'SGEMLQT', INFOT, NOUT, LERR, OK )
161      INFOT = 4
162      CALL SGEMLQT( 'L', 'N', 0, -1, 0, 1, A, 1, T, 1, C, 1, W, INFO )
163      CALL CHKXER( 'SGEMLQT', INFOT, NOUT, LERR, OK )
164      INFOT = 5
165      CALL SGEMLQT( 'L', 'N', 0, 0, -1, 1, A, 1, T, 1, C, 1, W, INFO )
166      CALL CHKXER( 'SGEMLQT', INFOT, NOUT, LERR, OK )
167      INFOT = 5
168      CALL SGEMLQT( 'R', 'N', 0, 0, -1, 1, A, 1, T, 1, C, 1, W, INFO )
169      CALL CHKXER( 'SGEMLQT', INFOT, NOUT, LERR, OK )
170      INFOT = 6
171      CALL SGEMLQT( 'L', 'N', 0, 0, 0, 0, A, 1, T, 1, C, 1, W, INFO )
172      CALL CHKXER( 'SGEMLQT', INFOT, NOUT, LERR, OK )
173      INFOT = 8
174      CALL SGEMLQT( 'R', 'N', 2, 2, 2, 1, A, 1, T, 1, C, 1, W, INFO )
175      CALL CHKXER( 'SGEMLQT', INFOT, NOUT, LERR, OK )
176      INFOT = 8
177      CALL SGEMLQT( 'L', 'N', 2, 2, 2, 1, A, 1, T, 1, C, 1, W, INFO )
178      CALL CHKXER( 'SGEMLQT', INFOT, NOUT, LERR, OK )
179      INFOT = 10
180      CALL SGEMLQT( 'R', 'N', 1, 1, 1, 1, A, 1, T, 0, C, 1, W, INFO )
181      CALL CHKXER( 'SGEMLQT', INFOT, NOUT, LERR, OK )
182      INFOT = 12
183      CALL SGEMLQT( 'L', 'N', 1, 1, 1, 1, A, 1, T, 1, C, 0, W, INFO )
184      CALL CHKXER( 'SGEMLQT', INFOT, NOUT, LERR, OK )
185*
186*     Print a summary line.
187*
188      CALL ALAESM( PATH, OK, NOUT )
189*
190      RETURN
191*
192*     End of SERRLQT
193*
194      END
195