LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ schkec()

subroutine schkec ( real  THRESH,
logical  TSTERR,
integer  NIN,
integer  NOUT 
)

SCHKEC

Purpose:
 SCHKEC tests eigen- condition estimation routines
        SLALN2, SLASY2, SLANV2, SLAQTR, SLAEXC,
        STRSYL, STREXC, STRSNA, STRSEN, STGEXC

 In all cases, the routine runs through a fixed set of numerical
 examples, subjects them to various tests, and compares the test
 results to a threshold THRESH. In addition, STREXC, STRSNA and STRSEN
 are tested by reading in precomputed examples from a file (on input
 unit NIN).  Output is written to output unit NOUT.
Parameters
[in]THRESH
          THRESH is REAL
          Threshold for residual tests.  A computed test ratio passes
          the threshold if it is less than THRESH.
[in]TSTERR
          TSTERR is LOGICAL
          Flag that indicates whether error exits are to be tested.
[in]NIN
          NIN is INTEGER
          The logical unit number for input.
[in]NOUT
          NOUT is INTEGER
          The logical unit number for output.
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.

Definition at line 75 of file schkec.f.

76 *
77 * -- LAPACK test routine --
78 * -- LAPACK is a software package provided by Univ. of Tennessee, --
79 * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
80 *
81 * .. Scalar Arguments ..
82  LOGICAL TSTERR
83  INTEGER NIN, NOUT
84  REAL THRESH
85 * ..
86 *
87 * =====================================================================
88 *
89 * .. Local Scalars ..
90  LOGICAL OK
91  CHARACTER*3 PATH
92  INTEGER KLAEXC, KLALN2, KLANV2, KLAQTR, KLASY2, KTREXC,
93  $ KTRSEN, KTRSNA, KTRSYL, LLAEXC, LLALN2, LLANV2,
94  $ LLAQTR, LLASY2, LTREXC, LTRSYL, NLANV2, NLAQTR,
95  $ NLASY2, NTESTS, NTRSYL, KTGEXC, NTGEXC, LTGEXC
96  REAL EPS, RLAEXC, RLALN2, RLANV2, RLAQTR, RLASY2,
97  $ RTREXC, RTRSYL, SFMIN, RTGEXC
98 * ..
99 * .. Local Arrays ..
100  INTEGER LTRSEN( 3 ), LTRSNA( 3 ), NLAEXC( 2 ),
101  $ NLALN2( 2 ), NTREXC( 3 ), NTRSEN( 3 ),
102  $ NTRSNA( 3 )
103  REAL RTRSEN( 3 ), RTRSNA( 3 )
104 * ..
105 * .. External Subroutines ..
106  EXTERNAL serrec, sget31, sget32, sget33, sget34, sget35,
108 * ..
109 * .. External Functions ..
110  REAL SLAMCH
111  EXTERNAL slamch
112 * ..
113 * .. Executable Statements ..
114 *
115  path( 1: 1 ) = 'Single precision'
116  path( 2: 3 ) = 'EC'
117  eps = slamch( 'P' )
118  sfmin = slamch( 'S' )
119 *
120 * Print header information
121 *
122  WRITE( nout, fmt = 9989 )
123  WRITE( nout, fmt = 9988 )eps, sfmin
124  WRITE( nout, fmt = 9987 )thresh
125 *
126 * Test error exits if TSTERR is .TRUE.
127 *
128  IF( tsterr )
129  $ CALL serrec( path, nout )
130 *
131  ok = .true.
132  CALL sget31( rlaln2, llaln2, nlaln2, klaln2 )
133  IF( rlaln2.GT.thresh .OR. nlaln2( 1 ).NE.0 ) THEN
134  ok = .false.
135  WRITE( nout, fmt = 9999 )rlaln2, llaln2, nlaln2, klaln2
136  END IF
137 *
138  CALL sget32( rlasy2, llasy2, nlasy2, klasy2 )
139  IF( rlasy2.GT.thresh ) THEN
140  ok = .false.
141  WRITE( nout, fmt = 9998 )rlasy2, llasy2, nlasy2, klasy2
142  END IF
143 *
144  CALL sget33( rlanv2, llanv2, nlanv2, klanv2 )
145  IF( rlanv2.GT.thresh .OR. nlanv2.NE.0 ) THEN
146  ok = .false.
147  WRITE( nout, fmt = 9997 )rlanv2, llanv2, nlanv2, klanv2
148  END IF
149 *
150  CALL sget34( rlaexc, llaexc, nlaexc, klaexc )
151  IF( rlaexc.GT.thresh .OR. nlaexc( 2 ).NE.0 ) THEN
152  ok = .false.
153  WRITE( nout, fmt = 9996 )rlaexc, llaexc, nlaexc, klaexc
154  END IF
155 *
156  CALL sget35( rtrsyl, ltrsyl, ntrsyl, ktrsyl )
157  IF( rtrsyl.GT.thresh ) THEN
158  ok = .false.
159  WRITE( nout, fmt = 9995 )rtrsyl, ltrsyl, ntrsyl, ktrsyl
160  END IF
161 *
162  CALL sget36( rtrexc, ltrexc, ntrexc, ktrexc, nin )
163  IF( rtrexc.GT.thresh .OR. ntrexc( 3 ).GT.0 ) THEN
164  ok = .false.
165  WRITE( nout, fmt = 9994 )rtrexc, ltrexc, ntrexc, ktrexc
166  END IF
167 *
168  CALL sget37( rtrsna, ltrsna, ntrsna, ktrsna, nin )
169  IF( rtrsna( 1 ).GT.thresh .OR. rtrsna( 2 ).GT.thresh .OR.
170  $ ntrsna( 1 ).NE.0 .OR. ntrsna( 2 ).NE.0 .OR. ntrsna( 3 ).NE.0 )
171  $ THEN
172  ok = .false.
173  WRITE( nout, fmt = 9993 )rtrsna, ltrsna, ntrsna, ktrsna
174  END IF
175 *
176  CALL sget38( rtrsen, ltrsen, ntrsen, ktrsen, nin )
177  IF( rtrsen( 1 ).GT.thresh .OR. rtrsen( 2 ).GT.thresh .OR.
178  $ ntrsen( 1 ).NE.0 .OR. ntrsen( 2 ).NE.0 .OR. ntrsen( 3 ).NE.0 )
179  $ THEN
180  ok = .false.
181  WRITE( nout, fmt = 9992 )rtrsen, ltrsen, ntrsen, ktrsen
182  END IF
183 *
184  CALL sget39( rlaqtr, llaqtr, nlaqtr, klaqtr )
185  IF( rlaqtr.GT.thresh ) THEN
186  ok = .false.
187  WRITE( nout, fmt = 9991 )rlaqtr, llaqtr, nlaqtr, klaqtr
188  END IF
189 *
190  CALL sget40( rtgexc, ltgexc, ntgexc, ktgexc, nin )
191  IF( rtgexc.GT.thresh ) THEN
192  ok = .false.
193  WRITE( nout, fmt = 9986 )rtgexc, ltgexc, ntgexc, ktgexc
194  END IF
195 *
196  ntests = klaln2 + klasy2 + klanv2 + klaexc + ktrsyl + ktrexc +
197  $ ktrsna + ktrsen + klaqtr
198  IF( ok )
199  $ WRITE( nout, fmt = 9990 )path, ntests
200 *
201  RETURN
202  9999 FORMAT( ' Error in SLALN2: RMAX =', e12.3, / ' LMAX = ', i8, ' N',
203  $ 'INFO=', 2i8, ' KNT=', i8 )
204  9998 FORMAT( ' Error in SLASY2: RMAX =', e12.3, / ' LMAX = ', i8, ' N',
205  $ 'INFO=', i8, ' KNT=', i8 )
206  9997 FORMAT( ' Error in SLANV2: RMAX =', e12.3, / ' LMAX = ', i8, ' N',
207  $ 'INFO=', i8, ' KNT=', i8 )
208  9996 FORMAT( ' Error in SLAEXC: RMAX =', e12.3, / ' LMAX = ', i8, ' N',
209  $ 'INFO=', 2i8, ' KNT=', i8 )
210  9995 FORMAT( ' Error in STRSYL: RMAX =', e12.3, / ' LMAX = ', i8, ' N',
211  $ 'INFO=', i8, ' KNT=', i8 )
212  9994 FORMAT( ' Error in STREXC: RMAX =', e12.3, / ' LMAX = ', i8, ' N',
213  $ 'INFO=', 3i8, ' KNT=', i8 )
214  9993 FORMAT( ' Error in STRSNA: RMAX =', 3e12.3, / ' LMAX = ', 3i8,
215  $ ' NINFO=', 3i8, ' KNT=', i8 )
216  9992 FORMAT( ' Error in STRSEN: RMAX =', 3e12.3, / ' LMAX = ', 3i8,
217  $ ' NINFO=', 3i8, ' KNT=', i8 )
218  9991 FORMAT( ' Error in SLAQTR: RMAX =', e12.3, / ' LMAX = ', i8, ' N',
219  $ 'INFO=', i8, ' KNT=', i8 )
220  9990 FORMAT( / 1x, 'All tests for ', a3, ' routines passed the thresh',
221  $ 'old ( ', i6, ' tests run)' )
222  9989 FORMAT( ' Tests of the Nonsymmetric eigenproblem condition estim',
223  $ 'ation routines', / ' SLALN2, SLASY2, SLANV2, SLAEXC, STRS',
224  $ 'YL, STREXC, STRSNA, STRSEN, SLAQTR', / )
225  9988 FORMAT( ' Relative machine precision (EPS) = ', e16.6, / ' Safe ',
226  $ 'minimum (SFMIN) = ', e16.6, / )
227  9987 FORMAT( ' Routines pass computational tests if test ratio is les',
228  $ 's than', f8.2, / / )
229  9986 FORMAT( ' Error in STGEXC: RMAX =', e12.3, / ' LMAX = ', i8, ' N',
230  $ 'INFO=', i8, ' KNT=', i8 )
231 *
232 * End of SCHKEC
233 *
subroutine sget40(RMAX, LMAX, NINFO, KNT, NIN)
SGET40
Definition: sget40.f:83
subroutine sget36(RMAX, LMAX, NINFO, KNT, NIN)
SGET36
Definition: sget36.f:88
subroutine sget38(RMAX, LMAX, NINFO, KNT, NIN)
SGET38
Definition: sget38.f:91
subroutine sget33(RMAX, LMAX, NINFO, KNT)
SGET33
Definition: sget33.f:76
subroutine sget31(RMAX, LMAX, NINFO, KNT)
SGET31
Definition: sget31.f:91
subroutine serrec(PATH, NUNIT)
SERREC
Definition: serrec.f:56
subroutine sget34(RMAX, LMAX, NINFO, KNT)
SGET34
Definition: sget34.f:82
subroutine sget37(RMAX, LMAX, NINFO, KNT, NIN)
SGET37
Definition: sget37.f:90
subroutine sget35(RMAX, LMAX, NINFO, KNT)
SGET35
Definition: sget35.f:78
subroutine sget39(RMAX, LMAX, NINFO, KNT)
SGET39
Definition: sget39.f:103
subroutine sget32(RMAX, LMAX, NINFO, KNT)
SGET32
Definition: sget32.f:82
real function slamch(CMACH)
SLAMCH
Definition: slamch.f:68
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