LAPACK 3.12.1
LAPACK: Linear Algebra PACKage
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◆ serrgt()

subroutine serrgt ( character*3 path,
integer nunit )

SERRGT

Purpose:
!>
!> SERRGT tests the error exits for the REAL tridiagonal
!> routines.
!>
Parameters
[in]PATH
!>          PATH is CHARACTER*3
!>          The LAPACK path name for the routines to be tested.
!>
[in]NUNIT
!>          NUNIT is INTEGER
!>          The unit number for output.
!>
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.

Definition at line 54 of file serrgt.f.

55*
56* -- LAPACK test routine --
57* -- LAPACK is a software package provided by Univ. of Tennessee, --
58* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
59*
60* .. Scalar Arguments ..
61 CHARACTER*3 PATH
62 INTEGER NUNIT
63* ..
64*
65* =====================================================================
66*
67* .. Parameters ..
68 INTEGER NMAX
69 parameter( nmax = 2 )
70* ..
71* .. Local Scalars ..
72 CHARACTER*2 C2
73 INTEGER INFO
74 REAL ANORM, RCOND
75* ..
76* .. Local Arrays ..
77 INTEGER IP( NMAX ), IW( NMAX )
78 REAL B( NMAX ), C( NMAX ), CF( NMAX ), D( NMAX ),
79 $ DF( NMAX ), E( NMAX ), EF( NMAX ), F( NMAX ),
80 $ R1( NMAX ), R2( NMAX ), W( NMAX ), X( NMAX )
81* ..
82* .. External Functions ..
83 LOGICAL LSAMEN
84 EXTERNAL lsamen
85* ..
86* .. External Subroutines ..
87 EXTERNAL alaesm, chkxer, sgtcon, sgtrfs, sgttrf, sgttrs,
88 $ sptcon, sptrfs, spttrf, spttrs
89* ..
90* .. Scalars in Common ..
91 LOGICAL LERR, OK
92 CHARACTER*32 SRNAMT
93 INTEGER INFOT, NOUT
94* ..
95* .. Common blocks ..
96 COMMON / infoc / infot, nout, ok, lerr
97 COMMON / srnamc / srnamt
98* ..
99* .. Executable Statements ..
100*
101 nout = nunit
102 WRITE( nout, fmt = * )
103 c2 = path( 2: 3 )
104 d( 1 ) = 1.
105 d( 2 ) = 2.
106 df( 1 ) = 1.
107 df( 2 ) = 2.
108 e( 1 ) = 3.
109 e( 2 ) = 4.
110 ef( 1 ) = 3.
111 ef( 2 ) = 4.
112 anorm = 1.0
113 ok = .true.
114*
115 IF( lsamen( 2, c2, 'GT' ) ) THEN
116*
117* Test error exits for the general tridiagonal routines.
118*
119* SGTTRF
120*
121 srnamt = 'SGTTRF'
122 infot = 1
123 CALL sgttrf( -1, c, d, e, f, ip, info )
124 CALL chkxer( 'SGTTRF', infot, nout, lerr, ok )
125*
126* SGTTRS
127*
128 srnamt = 'SGTTRS'
129 infot = 1
130 CALL sgttrs( '/', 0, 0, c, d, e, f, ip, x, 1, info )
131 CALL chkxer( 'SGTTRS', infot, nout, lerr, ok )
132 infot = 2
133 CALL sgttrs( 'N', -1, 0, c, d, e, f, ip, x, 1, info )
134 CALL chkxer( 'SGTTRS', infot, nout, lerr, ok )
135 infot = 3
136 CALL sgttrs( 'N', 0, -1, c, d, e, f, ip, x, 1, info )
137 CALL chkxer( 'SGTTRS', infot, nout, lerr, ok )
138 infot = 10
139 CALL sgttrs( 'N', 2, 1, c, d, e, f, ip, x, 1, info )
140 CALL chkxer( 'SGTTRS', infot, nout, lerr, ok )
141*
142* SGTRFS
143*
144 srnamt = 'SGTRFS'
145 infot = 1
146 CALL sgtrfs( '/', 0, 0, c, d, e, cf, df, ef, f, ip, b, 1, x, 1,
147 $ r1, r2, w, iw, info )
148 CALL chkxer( 'SGTRFS', infot, nout, lerr, ok )
149 infot = 2
150 CALL sgtrfs( 'N', -1, 0, c, d, e, cf, df, ef, f, ip, b, 1, x,
151 $ 1, r1, r2, w, iw, info )
152 CALL chkxer( 'SGTRFS', infot, nout, lerr, ok )
153 infot = 3
154 CALL sgtrfs( 'N', 0, -1, c, d, e, cf, df, ef, f, ip, b, 1, x,
155 $ 1, r1, r2, w, iw, info )
156 CALL chkxer( 'SGTRFS', infot, nout, lerr, ok )
157 infot = 13
158 CALL sgtrfs( 'N', 2, 1, c, d, e, cf, df, ef, f, ip, b, 1, x, 2,
159 $ r1, r2, w, iw, info )
160 CALL chkxer( 'SGTRFS', infot, nout, lerr, ok )
161 infot = 15
162 CALL sgtrfs( 'N', 2, 1, c, d, e, cf, df, ef, f, ip, b, 2, x, 1,
163 $ r1, r2, w, iw, info )
164 CALL chkxer( 'SGTRFS', infot, nout, lerr, ok )
165*
166* SGTCON
167*
168 srnamt = 'SGTCON'
169 infot = 1
170 CALL sgtcon( '/', 0, c, d, e, f, ip, anorm, rcond, w, iw,
171 $ info )
172 CALL chkxer( 'SGTCON', infot, nout, lerr, ok )
173 infot = 2
174 CALL sgtcon( 'I', -1, c, d, e, f, ip, anorm, rcond, w, iw,
175 $ info )
176 CALL chkxer( 'SGTCON', infot, nout, lerr, ok )
177 infot = 8
178 CALL sgtcon( 'I', 0, c, d, e, f, ip, -anorm, rcond, w, iw,
179 $ info )
180 CALL chkxer( 'SGTCON', infot, nout, lerr, ok )
181*
182 ELSE IF( lsamen( 2, c2, 'PT' ) ) THEN
183*
184* Test error exits for the positive definite tridiagonal
185* routines.
186*
187* SPTTRF
188*
189 srnamt = 'SPTTRF'
190 infot = 1
191 CALL spttrf( -1, d, e, info )
192 CALL chkxer( 'SPTTRF', infot, nout, lerr, ok )
193*
194* SPTTRS
195*
196 srnamt = 'SPTTRS'
197 infot = 1
198 CALL spttrs( -1, 0, d, e, x, 1, info )
199 CALL chkxer( 'SPTTRS', infot, nout, lerr, ok )
200 infot = 2
201 CALL spttrs( 0, -1, d, e, x, 1, info )
202 CALL chkxer( 'SPTTRS', infot, nout, lerr, ok )
203 infot = 6
204 CALL spttrs( 2, 1, d, e, x, 1, info )
205 CALL chkxer( 'SPTTRS', infot, nout, lerr, ok )
206*
207* SPTRFS
208*
209 srnamt = 'SPTRFS'
210 infot = 1
211 CALL sptrfs( -1, 0, d, e, df, ef, b, 1, x, 1, r1, r2, w, info )
212 CALL chkxer( 'SPTRFS', infot, nout, lerr, ok )
213 infot = 2
214 CALL sptrfs( 0, -1, d, e, df, ef, b, 1, x, 1, r1, r2, w, info )
215 CALL chkxer( 'SPTRFS', infot, nout, lerr, ok )
216 infot = 8
217 CALL sptrfs( 2, 1, d, e, df, ef, b, 1, x, 2, r1, r2, w, info )
218 CALL chkxer( 'SPTRFS', infot, nout, lerr, ok )
219 infot = 10
220 CALL sptrfs( 2, 1, d, e, df, ef, b, 2, x, 1, r1, r2, w, info )
221 CALL chkxer( 'SPTRFS', infot, nout, lerr, ok )
222*
223* SPTCON
224*
225 srnamt = 'SPTCON'
226 infot = 1
227 CALL sptcon( -1, d, e, anorm, rcond, w, info )
228 CALL chkxer( 'SPTCON', infot, nout, lerr, ok )
229 infot = 4
230 CALL sptcon( 0, d, e, -anorm, rcond, w, info )
231 CALL chkxer( 'SPTCON', infot, nout, lerr, ok )
232 END IF
233*
234* Print a summary line.
235*
236 CALL alaesm( path, ok, nout )
237*
238 RETURN
239*
240* End of SERRGT
241*
alaesm
subroutine alaesm(path, ok, nout)
ALAESM
Definition alaesm.f:63
chkxer
subroutine chkxer(srnamt, infot, nout, lerr, ok)
Definition cblat2.f:3224
sgtcon
subroutine sgtcon(norm, n, dl, d, du, du2, ipiv, anorm, rcond, work, iwork, info)
SGTCON
Definition sgtcon.f:144
sgtrfs
subroutine sgtrfs(trans, n, nrhs, dl, d, du, dlf, df, duf, du2, ipiv, b, ldb, x, ldx, ferr, berr, work, iwork, info)
SGTRFS
Definition sgtrfs.f:208
sgttrf
subroutine sgttrf(n, dl, d, du, du2, ipiv, info)
SGTTRF
Definition sgttrf.f:122
sgttrs
subroutine sgttrs(trans, n, nrhs, dl, d, du, du2, ipiv, b, ldb, info)
SGTTRS
Definition sgttrs.f:137
lsamen
logical function lsamen(n, ca, cb)
LSAMEN
Definition lsamen.f:72
sptcon
subroutine sptcon(n, d, e, anorm, rcond, work, info)
SPTCON
Definition sptcon.f:116
sptrfs
subroutine sptrfs(n, nrhs, d, e, df, ef, b, ldb, x, ldx, ferr, berr, work, info)
SPTRFS
Definition sptrfs.f:161
spttrf
subroutine spttrf(n, d, e, info)
SPTTRF
Definition spttrf.f:89
spttrs
subroutine spttrs(n, nrhs, d, e, b, ldb, info)
SPTTRS
Definition spttrs.f:107
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