1*> \brief \b ZERRTSQR
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 ZERRTSQR( 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*> ZERRTSQR tests the error exits for the ZOUBLE PRECISION routines
25*> that use the TSQR 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 Zenver
49*> \author NAG Ltd.
50*
51*> \ingroup double_lin
52*
53*  =====================================================================
54      SUBROUTINE ZERRTSQR( 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, NB
74*     ..
75*     .. Local Arrays ..
76      COMPLEX*16         A( NMAX, NMAX ), T( NMAX, NMAX ), W( NMAX ),
77     $                   C( NMAX, NMAX ), TAU(NMAX)
78*     ..
79*     .. External Subroutines ..
80      EXTERNAL           ALAESM, CHKXER, ZGEQR,
81     $                   ZGEMQR, ZGELQ, ZGEMLQ
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          DBLE
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 / DBLE( I+J )
105            C( I, J ) = 1.D0 / DBLE( I+J )
106            T( I, J ) = 1.D0 / DBLE( I+J )
107         END DO
108         W( J ) = 0.D0
109      END DO
110      OK = .TRUE.
111*
112*     Error exits for TS factorization
113*
114*     ZGEQR
115*
116      SRNAMT = 'ZGEQR'
117      INFOT = 1
118      CALL ZGEQR( -1, 0, A, 1, TAU, 1, W, 1, INFO )
119      CALL CHKXER( 'ZGEQR', INFOT, NOUT, LERR, OK )
120      INFOT = 2
121      CALL ZGEQR( 0, -1, A, 1, TAU, 1, W, 1, INFO )
122      CALL CHKXER( 'ZGEQR', INFOT, NOUT, LERR, OK )
123      INFOT = 4
124      CALL ZGEQR( 1, 1, A, 0, TAU, 1, W, 1, INFO )
125      CALL CHKXER( 'ZGEQR', INFOT, NOUT, LERR, OK )
126      INFOT = 6
127      CALL ZGEQR( 3, 2, A, 3, TAU, 1, W, 1, INFO )
128      CALL CHKXER( 'ZGEQR', INFOT, NOUT, LERR, OK )
129      INFOT = 8
130      CALL ZGEQR( 3, 2, A, 3, TAU, 8, W, 0, INFO )
131      CALL CHKXER( 'ZGEQR', INFOT, NOUT, LERR, OK )
132*
133*     ZGEMQR
134*
135      TAU(1)=1
136      TAU(2)=1
137      SRNAMT = 'ZGEMQR'
138      NB=1
139      INFOT = 1
140      CALL ZGEMQR( '/', 'N', 0, 0, 0, A, 1, TAU, 1, C, 1, W, 1,INFO)
141      CALL CHKXER( 'ZGEMQR', INFOT, NOUT, LERR, OK )
142      INFOT = 2
143      CALL ZGEMQR( 'L', '/', 0, 0, 0, A, 1, TAU, 1, C, 1, W, 1,INFO)
144      CALL CHKXER( 'ZGEMQR', INFOT, NOUT, LERR, OK )
145      INFOT = 3
146      CALL ZGEMQR( 'L', 'N', -1, 0, 0, A, 1, TAU, 1, C, 1, W,1,INFO)
147      CALL CHKXER( 'ZGEMQR', INFOT, NOUT, LERR, OK )
148      INFOT = 4
149      CALL ZGEMQR( 'L', 'N', 0, -1, 0, A, 1, TAU, 1, C, 1, W,1,INFO)
150      CALL CHKXER( 'ZGEMQR', INFOT, NOUT, LERR, OK )
151      INFOT = 5
152      CALL ZGEMQR( 'L', 'N', 0, 0, -1, A, 1, TAU, 1, C, 1, W,1,INFO)
153      CALL CHKXER( 'ZGEMQR', INFOT, NOUT, LERR, OK )
154      INFOT = 5
155      CALL ZGEMQR( 'R', 'N', 0, 0, -1, A, 1, TAU, 1, C, 1, W,1,INFO)
156      CALL CHKXER( 'ZGEMQR', INFOT, NOUT, LERR, OK )
157      INFOT = 7
158      CALL ZGEMQR( 'L', 'N', 2, 1, 0, A, 0, TAU, 1, C, 1, W, 1,INFO)
159      CALL CHKXER( 'ZGEMQR', INFOT, NOUT, LERR, OK )
160      INFOT = 9
161      CALL ZGEMQR( 'R', 'N', 2, 2, 1, A, 2, TAU, 0, C, 1, W, 1,INFO)
162      CALL CHKXER( 'ZGEMQR', INFOT, NOUT, LERR, OK )
163      INFOT = 9
164      CALL ZGEMQR( 'L', 'N', 2, 2, 1, A, 2, TAU, 0, C, 1, W, 1,INFO)
165      CALL CHKXER( 'ZGEMQR', INFOT, NOUT, LERR, OK )
166      INFOT = 11
167      CALL ZGEMQR( 'L', 'N', 2, 1, 1, A, 2, TAU, 6, C, 0, W, 1,INFO)
168      CALL CHKXER( 'ZGEMQR', INFOT, NOUT, LERR, OK )
169      INFOT = 13
170      CALL ZGEMQR( 'L', 'N', 2, 2, 1, A, 2, TAU, 6, C, 2, W, 0,INFO)
171      CALL CHKXER( 'ZGEMQR', INFOT, NOUT, LERR, OK )
172*
173*     ZGELQ
174*
175      SRNAMT = 'ZGELQ'
176      INFOT = 1
177      CALL ZGELQ( -1, 0, A, 1, TAU, 1, W, 1, INFO )
178      CALL CHKXER( 'ZGELQ', INFOT, NOUT, LERR, OK )
179      INFOT = 2
180      CALL ZGELQ( 0, -1, A, 1, TAU, 1, W, 1, INFO )
181      CALL CHKXER( 'ZGELQ', INFOT, NOUT, LERR, OK )
182      INFOT = 4
183      CALL ZGELQ( 1, 1, A, 0, TAU, 1, W, 1, INFO )
184      CALL CHKXER( 'ZGELQ', INFOT, NOUT, LERR, OK )
185      INFOT = 6
186      CALL ZGELQ( 2, 3, A, 3, TAU, 1, W, 1, INFO )
187      CALL CHKXER( 'ZGELQ', INFOT, NOUT, LERR, OK )
188      INFOT = 8
189      CALL ZGELQ( 2, 3, A, 3, TAU, 8, W, 0, INFO )
190      CALL CHKXER( 'ZGELQ', INFOT, NOUT, LERR, OK )
191*
192*     ZGEMLQ
193*
194      TAU(1)=1
195      TAU(2)=1
196      SRNAMT = 'ZGEMLQ'
197      NB=1
198      INFOT = 1
199      CALL ZGEMLQ( '/', 'N', 0, 0, 0, A, 1, TAU, 1, C, 1, W, 1,INFO)
200      CALL CHKXER( 'ZGEMLQ', INFOT, NOUT, LERR, OK )
201      INFOT = 2
202      CALL ZGEMLQ( 'L', '/', 0, 0, 0, A, 1, TAU, 1, C, 1, W, 1,INFO)
203      CALL CHKXER( 'ZGEMLQ', INFOT, NOUT, LERR, OK )
204      INFOT = 3
205      CALL ZGEMLQ( 'L', 'N', -1, 0, 0, A, 1, TAU, 1, C, 1, W,1,INFO)
206      CALL CHKXER( 'ZGEMLQ', INFOT, NOUT, LERR, OK )
207      INFOT = 4
208      CALL ZGEMLQ( 'L', 'N', 0, -1, 0, A, 1, TAU, 1, C, 1, W,1,INFO)
209      CALL CHKXER( 'ZGEMLQ', INFOT, NOUT, LERR, OK )
210      INFOT = 5
211      CALL ZGEMLQ( 'L', 'N', 0, 0, -1, A, 1, TAU, 1, C, 1, W,1,INFO)
212      CALL CHKXER( 'ZGEMLQ', INFOT, NOUT, LERR, OK )
213      INFOT = 5
214      CALL ZGEMLQ( 'R', 'N', 0, 0, -1, A, 1, TAU, 1, C, 1, W,1,INFO)
215      CALL CHKXER( 'ZGEMLQ', INFOT, NOUT, LERR, OK )
216      INFOT = 7
217      CALL ZGEMLQ( 'L', 'N', 1, 2, 0, A, 0, TAU, 1, C, 1, W, 1,INFO)
218      CALL CHKXER( 'ZGEMLQ', INFOT, NOUT, LERR, OK )
219      INFOT = 9
220      CALL ZGEMLQ( 'R', 'N', 2, 2, 1, A, 1, TAU, 0, C, 1, W, 1,INFO)
221      CALL CHKXER( 'ZGEMLQ', INFOT, NOUT, LERR, OK )
222      INFOT = 9
223      CALL ZGEMLQ( 'L', 'N', 2, 2, 1, A, 1, TAU, 0, C, 1, W, 1,INFO)
224      CALL CHKXER( 'ZGEMLQ', INFOT, NOUT, LERR, OK )
225      INFOT = 11
226      CALL ZGEMLQ( 'L', 'N', 1, 2, 1, A, 1, TAU, 6, C, 0, W, 1,INFO)
227      CALL CHKXER( 'ZGEMLQ', INFOT, NOUT, LERR, OK )
228      INFOT = 13
229      CALL ZGEMLQ( 'L', 'N', 2, 2, 1, A, 2, TAU, 6, C, 2, W, 0,INFO)
230      CALL CHKXER( 'ZGEMLQ', INFOT, NOUT, LERR, OK )
231*
232*     Print a summary line.
233*
234      CALL ALAESM( PATH, OK, NOUT )
235*
236      RETURN
237*
238*     End of ZERRTSQR
239*
240      END
241