1*> \brief \b DERRTSQR
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 DERRTSQR( 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*> DERRTSQR tests the error exits for the DOUBLE 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 Denver
49*> \author NAG Ltd.
50*
51*> \date December 2016
52*
53*> \ingroup double_lin
54*
55*  =====================================================================
56      SUBROUTINE DERRTSQR( PATH, NUNIT )
57      IMPLICIT NONE
58*
59*  -- LAPACK test routine (version 3.7.0) --
60*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
61*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
62*     December 2016
63*
64*     .. Scalar Arguments ..
65      CHARACTER*3        PATH
66      INTEGER            NUNIT
67*     ..
68*
69*  =====================================================================
70*
71*     .. Parameters ..
72      INTEGER            NMAX
73      PARAMETER          ( NMAX = 2 )
74*     ..
75*     .. Local Scalars ..
76      INTEGER            I, INFO, J, NB
77*     ..
78*     .. Local Arrays ..
79      DOUBLE PRECISION   A( NMAX, NMAX ), T( NMAX, NMAX ), W( NMAX ),
80     $                   C( NMAX, NMAX ), TAU(NMAX*2)
81*     ..
82*     .. External Subroutines ..
83      EXTERNAL           ALAESM, CHKXER, DGEQR,
84     $                   DGEMQR, DGELQ, DGEMLQ
85*     ..
86*     .. Scalars in Common ..
87      LOGICAL            LERR, OK
88      CHARACTER*32       SRNAMT
89      INTEGER            INFOT, NOUT
90*     ..
91*     .. Common blocks ..
92      COMMON             / INFOC / INFOT, NOUT, OK, LERR
93      COMMON             / SRNAMC / SRNAMT
94*     ..
95*     .. Intrinsic Functions ..
96      INTRINSIC          DBLE
97*     ..
98*     .. Executable Statements ..
99*
100      NOUT = NUNIT
101      WRITE( NOUT, FMT = * )
102*
103*     Set the variables to innocuous values.
104*
105      DO J = 1, NMAX
106         DO I = 1, NMAX
107            A( I, J ) = 1.D0 / DBLE( I+J )
108            C( I, J ) = 1.D0 / DBLE( I+J )
109            T( I, J ) = 1.D0 / DBLE( I+J )
110         END DO
111         W( J ) = 0.D0
112      END DO
113      OK = .TRUE.
114*
115*     Error exits for TS factorization
116*
117*     DGEQR
118*
119      SRNAMT = 'DGEQR'
120      INFOT = 1
121      CALL DGEQR( -1, 0, A, 1, TAU, 1, W, 1, INFO )
122      CALL CHKXER( 'DGEQR', INFOT, NOUT, LERR, OK )
123      INFOT = 2
124      CALL DGEQR( 0, -1, A, 1, TAU, 1, W, 1, INFO )
125      CALL CHKXER( 'DGEQR', INFOT, NOUT, LERR, OK )
126      INFOT = 4
127      CALL DGEQR( 1, 1, A, 0, TAU, 1, W, 1, INFO )
128      CALL CHKXER( 'DGEQR', INFOT, NOUT, LERR, OK )
129      INFOT = 6
130      CALL DGEQR( 3, 2, A, 3, TAU, 1, W, 1, INFO )
131      CALL CHKXER( 'DGEQR', INFOT, NOUT, LERR, OK )
132      INFOT = 8
133      CALL DGEQR( 3, 2, A, 3, TAU, 7, W, 0, INFO )
134      CALL CHKXER( 'DGEQR', INFOT, NOUT, LERR, OK )
135*
136*     DGEMQR
137*
138      TAU(1)=1
139      TAU(2)=1
140      TAU(3)=1
141      TAU(4)=1
142      SRNAMT = 'DGEMQR'
143      NB=1
144      INFOT = 1
145      CALL DGEMQR( '/', 'N', 0, 0, 0, A, 1, TAU, 1, C, 1, W, 1,INFO)
146      CALL CHKXER( 'DGEMQR', INFOT, NOUT, LERR, OK )
147      INFOT = 2
148      CALL DGEMQR( 'L', '/', 0, 0, 0, A, 1, TAU, 1, C, 1, W, 1,INFO)
149      CALL CHKXER( 'DGEMQR', INFOT, NOUT, LERR, OK )
150      INFOT = 3
151      CALL DGEMQR( 'L', 'N', -1, 0, 0, A, 1, TAU, 1, C, 1, W,1,INFO)
152      CALL CHKXER( 'DGEMQR', INFOT, NOUT, LERR, OK )
153      INFOT = 4
154      CALL DGEMQR( 'L', 'N', 0, -1, 0, A, 1, TAU, 1, C, 1, W,1,INFO)
155      CALL CHKXER( 'DGEMQR', INFOT, NOUT, LERR, OK )
156      INFOT = 5
157      CALL DGEMQR( 'L', 'N', 0, 0, -1, A, 1, TAU, 1, C, 1, W,1,INFO)
158      CALL CHKXER( 'DGEMQR', INFOT, NOUT, LERR, OK )
159      INFOT = 5
160      CALL DGEMQR( 'R', 'N', 0, 0, -1, A, 1, TAU, 1, C, 1, W,1,INFO)
161      CALL CHKXER( 'DGEMQR', INFOT, NOUT, LERR, OK )
162      INFOT = 7
163      CALL DGEMQR( 'L', 'N', 2, 1, 0, A, 0, TAU, 1, C, 1, W, 1,INFO)
164      CALL CHKXER( 'DGEMQR', INFOT, NOUT, LERR, OK )
165      INFOT = 9
166      CALL DGEMQR( 'R', 'N', 2, 2, 1, A, 2, TAU, 0, C, 1, W, 1,INFO)
167      CALL CHKXER( 'DGEMQR', INFOT, NOUT, LERR, OK )
168      INFOT = 9
169      CALL DGEMQR( 'L', 'N', 2, 2, 1, A, 2, TAU, 0, C, 1, W, 1,INFO)
170      CALL CHKXER( 'DGEMQR', INFOT, NOUT, LERR, OK )
171      INFOT = 11
172      CALL DGEMQR( 'L', 'N', 2, 1, 1, A, 2, TAU, 6, C, 0, W, 1,INFO)
173      CALL CHKXER( 'DGEMQR', INFOT, NOUT, LERR, OK )
174      INFOT = 13
175      CALL DGEMQR( 'L', 'N', 2, 2, 1, A, 2, TAU, 6, C, 2, W, 0,INFO)
176      CALL CHKXER( 'DGEMQR', INFOT, NOUT, LERR, OK )
177*
178*     DGELQ
179*
180      SRNAMT = 'DGELQ'
181      INFOT = 1
182      CALL DGELQ( -1, 0, A, 1, TAU, 1, W, 1, INFO )
183      CALL CHKXER( 'DGELQ', INFOT, NOUT, LERR, OK )
184      INFOT = 2
185      CALL DGELQ( 0, -1, A, 1, TAU, 1, W, 1, INFO )
186      CALL CHKXER( 'DGELQ', INFOT, NOUT, LERR, OK )
187      INFOT = 4
188      CALL DGELQ( 1, 1, A, 0, TAU, 1, W, 1, INFO )
189      CALL CHKXER( 'DGELQ', INFOT, NOUT, LERR, OK )
190      INFOT = 6
191      CALL DGELQ( 2, 3, A, 3, TAU, 1, W, 1, INFO )
192      CALL CHKXER( 'DGELQ', INFOT, NOUT, LERR, OK )
193      INFOT = 8
194      CALL DGELQ( 2, 3, A, 3, TAU, 7, W, 0, INFO )
195      CALL CHKXER( 'DGELQ', INFOT, NOUT, LERR, OK )
196*
197*     DGEMLQ
198*
199      TAU(1)=1
200      TAU(2)=1
201      SRNAMT = 'DGEMLQ'
202      NB=1
203      INFOT = 1
204      CALL DGEMLQ( '/', 'N', 0, 0, 0, A, 1, TAU, 1, C, 1, W, 1,INFO)
205      CALL CHKXER( 'DGEMLQ', INFOT, NOUT, LERR, OK )
206      INFOT = 2
207      CALL DGEMLQ( 'L', '/', 0, 0, 0, A, 1, TAU, 1, C, 1, W, 1,INFO)
208      CALL CHKXER( 'DGEMLQ', INFOT, NOUT, LERR, OK )
209      INFOT = 3
210      CALL DGEMLQ( 'L', 'N', -1, 0, 0, A, 1, TAU, 1, C, 1, W,1,INFO)
211      CALL CHKXER( 'DGEMLQ', INFOT, NOUT, LERR, OK )
212      INFOT = 4
213      CALL DGEMLQ( 'L', 'N', 0, -1, 0, A, 1, TAU, 1, C, 1, W,1,INFO)
214      CALL CHKXER( 'DGEMLQ', INFOT, NOUT, LERR, OK )
215      INFOT = 5
216      CALL DGEMLQ( 'L', 'N', 0, 0, -1, A, 1, TAU, 1, C, 1, W,1,INFO)
217      CALL CHKXER( 'DGEMLQ', INFOT, NOUT, LERR, OK )
218      INFOT = 5
219      CALL DGEMLQ( 'R', 'N', 0, 0, -1, A, 1, TAU, 1, C, 1, W,1,INFO)
220      CALL CHKXER( 'DGEMLQ', INFOT, NOUT, LERR, OK )
221      INFOT = 7
222      CALL DGEMLQ( 'L', 'N', 1, 2, 0, A, 0, TAU, 1, C, 1, W, 1,INFO)
223      CALL CHKXER( 'DGEMLQ', INFOT, NOUT, LERR, OK )
224      INFOT = 9
225      CALL DGEMLQ( 'R', 'N', 2, 2, 1, A, 1, TAU, 0, C, 1, W, 1,INFO)
226      CALL CHKXER( 'DGEMLQ', INFOT, NOUT, LERR, OK )
227      INFOT = 9
228      CALL DGEMLQ( 'L', 'N', 2, 2, 1, A, 1, TAU, 0, C, 1, W, 1,INFO)
229      CALL CHKXER( 'DGEMLQ', INFOT, NOUT, LERR, OK )
230      INFOT = 11
231      CALL DGEMLQ( 'L', 'N', 1, 2, 1, A, 1, TAU, 6, C, 0, W, 1,INFO)
232      CALL CHKXER( 'DGEMLQ', INFOT, NOUT, LERR, OK )
233      INFOT = 13
234      CALL DGEMLQ( 'L', 'N', 2, 2, 1, A, 2, TAU, 6, C, 2, W, 0,INFO)
235      CALL CHKXER( 'DGEMLQ', INFOT, NOUT, LERR, OK )
236*
237*     Print a summary line.
238*
239      CALL ALAESM( PATH, OK, NOUT )
240*
241      RETURN
242*
243*     End of DERRTSQR
244*
245      END
246