LAPACK  3.4.2 LAPACK: Linear Algebra PACKage
cdrvrf1.f
Go to the documentation of this file.
1 *> \brief \b CDRVRF1
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 CDRVRF1( NOUT, NN, NVAL, THRESH, A, LDA, ARF, WORK )
12 *
13 * .. Scalar Arguments ..
14 * INTEGER LDA, NN, NOUT
15 * REAL THRESH
16 * ..
17 * .. Array Arguments ..
18 * INTEGER NVAL( NN )
19 * REAL WORK( * )
20 * COMPLEX A( LDA, * ), ARF( * )
21 * ..
22 *
23 *
24 *> \par Purpose:
25 * =============
26 *>
27 *> \verbatim
28 *>
29 *> CDRVRF1 tests the LAPACK RFP routines:
30 *> CLANHF.F
31 *> \endverbatim
32 *
33 * Arguments:
34 * ==========
35 *
36 *> \param[in] NOUT
37 *> \verbatim
38 *> NOUT is INTEGER
39 *> The unit number for output.
40 *> \endverbatim
41 *>
42 *> \param[in] NN
43 *> \verbatim
44 *> NN is INTEGER
45 *> The number of values of N contained in the vector NVAL.
46 *> \endverbatim
47 *>
48 *> \param[in] NVAL
49 *> \verbatim
50 *> NVAL is INTEGER array, dimension (NN)
51 *> The values of the matrix dimension N.
52 *> \endverbatim
53 *>
54 *> \param[in] THRESH
55 *> \verbatim
56 *> THRESH is REAL
57 *> The threshold value for the test ratios. A result is
58 *> included in the output file if RESULT >= THRESH. To have
59 *> every test ratio printed, use THRESH = 0.
60 *> \endverbatim
61 *>
62 *> \param[out] A
63 *> \verbatim
64 *> A is COMPLEX array, dimension (LDA,NMAX)
65 *> \endverbatim
66 *>
67 *> \param[in] LDA
68 *> \verbatim
69 *> LDA is INTEGER
70 *> The leading dimension of the array A. LDA >= max(1,NMAX).
71 *> \endverbatim
72 *>
73 *> \param[out] ARF
74 *> \verbatim
75 *> ARF is COMPLEX array, dimension ((NMAX*(NMAX+1))/2).
76 *> \endverbatim
77 *>
78 *> \param[out] WORK
79 *> \verbatim
80 *> WORK is COMPLEX array, dimension ( NMAX )
81 *> \endverbatim
82 *
83 * Authors:
84 * ========
85 *
86 *> \author Univ. of Tennessee
87 *> \author Univ. of California Berkeley
88 *> \author Univ. of Colorado Denver
89 *> \author NAG Ltd.
90 *
91 *> \date November 2011
92 *
93 *> \ingroup complex_lin
94 *
95 * =====================================================================
96  SUBROUTINE cdrvrf1( NOUT, NN, NVAL, THRESH, A, LDA, ARF, WORK )
97 *
98 * -- LAPACK test routine (version 3.4.0) --
99 * -- LAPACK is a software package provided by Univ. of Tennessee, --
100 * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
101 * November 2011
102 *
103 * .. Scalar Arguments ..
104  INTEGER lda, nn, nout
105  REAL thresh
106 * ..
107 * .. Array Arguments ..
108  INTEGER nval( nn )
109  REAL work( * )
110  COMPLEX a( lda, * ), arf( * )
111 * ..
112 *
113 * =====================================================================
114 * ..
115 * .. Parameters ..
116  REAL one
117  parameter( one = 1.0e+0 )
118  INTEGER ntests
119  parameter( ntests = 1 )
120 * ..
121 * .. Local Scalars ..
122  CHARACTER uplo, cform, norm
123  INTEGER i, iform, iin, iit, info, inorm, iuplo, j, n,
124  + nerrs, nfail, nrun
125  REAL eps, large, norma, normarf, small
126 * ..
127 * .. Local Arrays ..
128  CHARACTER uplos( 2 ), forms( 2 ), norms( 4 )
129  INTEGER iseed( 4 ), iseedy( 4 )
130  REAL result( ntests )
131 * ..
132 * .. External Functions ..
133  COMPLEX clarnd
134  REAL slamch, clanhe, clanhf
135  EXTERNAL slamch, clarnd, clanhe, clanhf
136 * ..
137 * .. External Subroutines ..
138  EXTERNAL ctrttf
139 * ..
140 * .. Scalars in Common ..
141  CHARACTER*32 srnamt
142 * ..
143 * .. Common blocks ..
144  common / srnamc / srnamt
145 * ..
146 * .. Data statements ..
147  DATA iseedy / 1988, 1989, 1990, 1991 /
148  DATA uplos / 'U', 'L' /
149  DATA forms / 'N', 'C' /
150  DATA norms / 'M', '1', 'I', 'F' /
151 * ..
152 * .. Executable Statements ..
153 *
154 * Initialize constants and the random number seed.
155 *
156  nrun = 0
157  nfail = 0
158  nerrs = 0
159  info = 0
160  DO 10 i = 1, 4
161  iseed( i ) = iseedy( i )
162  10 continue
163 *
164  eps = slamch( 'Precision' )
165  small = slamch( 'Safe minimum' )
166  large = one / small
167  small = small * lda * lda
168  large = large / lda / lda
169 *
170  DO 130 iin = 1, nn
171 *
172  n = nval( iin )
173 *
174  DO 120 iit = 1, 3
175 * Nothing to do for N=0
176  IF ( n .EQ. 0 ) exit
177 *
178 * IIT = 1 : random matrix
179 * IIT = 2 : random matrix scaled near underflow
180 * IIT = 3 : random matrix scaled near overflow
181 *
182  DO j = 1, n
183  DO i = 1, n
184  a( i, j) = clarnd( 4, iseed )
185  END DO
186  END DO
187 *
188  IF ( iit.EQ.2 ) THEN
189  DO j = 1, n
190  DO i = 1, n
191  a( i, j) = a( i, j ) * large
192  END DO
193  END DO
194  END IF
195 *
196  IF ( iit.EQ.3 ) THEN
197  DO j = 1, n
198  DO i = 1, n
199  a( i, j) = a( i, j) * small
200  END DO
201  END DO
202  END IF
203 *
204 * Do first for UPLO = 'U', then for UPLO = 'L'
205 *
206  DO 110 iuplo = 1, 2
207 *
208  uplo = uplos( iuplo )
209 *
210 * Do first for CFORM = 'N', then for CFORM = 'C'
211 *
212  DO 100 iform = 1, 2
213 *
214  cform = forms( iform )
215 *
216  srnamt = 'CTRTTF'
217  CALL ctrttf( cform, uplo, n, a, lda, arf, info )
218 *
219 * Check error code from CTRTTF
220 *
221  IF( info.NE.0 ) THEN
222  IF( nfail.EQ.0 .AND. nerrs.EQ.0 ) THEN
223  WRITE( nout, * )
224  WRITE( nout, fmt = 9999 )
225  END IF
226  WRITE( nout, fmt = 9998 ) srnamt, uplo, cform, n
227  nerrs = nerrs + 1
228  go to 100
229  END IF
230 *
231  DO 90 inorm = 1, 4
232 *
233 * Check all four norms: 'M', '1', 'I', 'F'
234 *
235  norm = norms( inorm )
236  normarf = clanhf( norm, cform, uplo, n, arf, work )
237  norma = clanhe( norm, uplo, n, a, lda, work )
238 *
239  result(1) = ( norma - normarf ) / norma / eps
240  nrun = nrun + 1
241 *
242  IF( result(1).GE.thresh ) THEN
243  IF( nfail.EQ.0 .AND. nerrs.EQ.0 ) THEN
244  WRITE( nout, * )
245  WRITE( nout, fmt = 9999 )
246  END IF
247  WRITE( nout, fmt = 9997 ) 'CLANHF',
248  + n, iit, uplo, cform, norm, result(1)
249  nfail = nfail + 1
250  END IF
251  90 continue
252  100 continue
253  110 continue
254  120 continue
255  130 continue
256 *
257 * Print a summary of the results.
258 *
259  IF ( nfail.EQ.0 ) THEN
260  WRITE( nout, fmt = 9996 )'CLANHF', nrun
261  ELSE
262  WRITE( nout, fmt = 9995 ) 'CLANHF', nfail, nrun
263  END IF
264  IF ( nerrs.NE.0 ) THEN
265  WRITE( nout, fmt = 9994 ) nerrs, 'CLANHF'
266  END IF
267 *
268  9999 format( 1x,
269 ' *** Error(s) or Failure(s) while testing CLANHF + ***')
270  9998 format( 1x, ' Error in ',a6,' with UPLO=''',a1,''', FORM=''',
271  + a1,''', N=',i5)
272  9997 format( 1x, ' Failure in ',a6,' N=',i5,' TYPE=',i5,' UPLO=''',
273  + a1, ''', FORM =''',a1,''', NORM=''',a1,''', test=',g12.5)
274  9996 format( 1x, 'All tests for ',a6,' auxiliary routine passed the ',
275  + 'threshold ( ',i5,' tests run)')
276  9995 format( 1x, a6, ' auxiliary routine: ',i5,' out of ',i5,
277  + ' tests failed to pass the threshold')
278  9994 format( 26x, i5,' error message recorded (',a6,')')
279 *
280  return
281 *
282 * End of CDRVRF1
283 *
284  END