1245 lines
44 KiB
Fortran
1245 lines
44 KiB
Fortran
*> \brief \b DCHKGG
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*
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* =========== DOCUMENTATION ===========
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*
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* Online html documentation available at
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* http://www.netlib.org/lapack/explore-html/
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*
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* Definition:
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* ===========
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*
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* SUBROUTINE DCHKGG( NSIZES, NN, NTYPES, DOTYPE, ISEED, THRESH,
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* TSTDIF, THRSHN, NOUNIT, A, LDA, B, H, T, S1,
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* S2, P1, P2, U, LDU, V, Q, Z, ALPHR1, ALPHI1,
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* BETA1, ALPHR3, ALPHI3, BETA3, EVECTL, EVECTR,
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* WORK, LWORK, LLWORK, RESULT, INFO )
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*
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* .. Scalar Arguments ..
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* LOGICAL TSTDIF
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* INTEGER INFO, LDA, LDU, LWORK, NOUNIT, NSIZES, NTYPES
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* DOUBLE PRECISION THRESH, THRSHN
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* ..
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* .. Array Arguments ..
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* LOGICAL DOTYPE( * ), LLWORK( * )
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* INTEGER ISEED( 4 ), NN( * )
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* DOUBLE PRECISION A( LDA, * ), ALPHI1( * ), ALPHI3( * ),
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* $ ALPHR1( * ), ALPHR3( * ), B( LDA, * ),
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* $ BETA1( * ), BETA3( * ), EVECTL( LDU, * ),
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* $ EVECTR( LDU, * ), H( LDA, * ), P1( LDA, * ),
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* $ P2( LDA, * ), Q( LDU, * ), RESULT( 15 ),
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* $ S1( LDA, * ), S2( LDA, * ), T( LDA, * ),
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* $ U( LDU, * ), V( LDU, * ), WORK( * ),
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* $ Z( LDU, * )
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* ..
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*
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*
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*> \par Purpose:
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* =============
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*>
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*> \verbatim
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*>
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*> DCHKGG checks the nonsymmetric generalized eigenvalue problem
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*> routines.
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*> T T T
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*> DGGHRD factors A and B as U H V and U T V , where means
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*> transpose, H is hessenberg, T is triangular and U and V are
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*> orthogonal.
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*> T T
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*> DHGEQZ factors H and T as Q S Z and Q P Z , where P is upper
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*> triangular, S is in generalized Schur form (block upper triangular,
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*> with 1x1 and 2x2 blocks on the diagonal, the 2x2 blocks
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*> corresponding to complex conjugate pairs of generalized
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*> eigenvalues), and Q and Z are orthogonal. It also computes the
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*> generalized eigenvalues (alpha(1),beta(1)),...,(alpha(n),beta(n)),
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*> where alpha(j)=S(j,j) and beta(j)=P(j,j) -- thus,
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*> w(j) = alpha(j)/beta(j) is a root of the generalized eigenvalue
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*> problem
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*>
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*> det( A - w(j) B ) = 0
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*>
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*> and m(j) = beta(j)/alpha(j) is a root of the essentially equivalent
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*> problem
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*>
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*> det( m(j) A - B ) = 0
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*>
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*> DTGEVC computes the matrix L of left eigenvectors and the matrix R
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*> of right eigenvectors for the matrix pair ( S, P ). In the
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*> description below, l and r are left and right eigenvectors
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*> corresponding to the generalized eigenvalues (alpha,beta).
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*>
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*> When DCHKGG is called, a number of matrix "sizes" ("n's") and a
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*> number of matrix "types" are specified. For each size ("n")
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*> and each type of matrix, one matrix will be generated and used
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*> to test the nonsymmetric eigenroutines. For each matrix, 15
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*> tests will be performed. The first twelve "test ratios" should be
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*> small -- O(1). They will be compared with the threshold THRESH:
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*>
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*> T
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*> (1) | A - U H V | / ( |A| n ulp )
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*>
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*> T
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*> (2) | B - U T V | / ( |B| n ulp )
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*>
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*> T
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*> (3) | I - UU | / ( n ulp )
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*>
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*> T
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*> (4) | I - VV | / ( n ulp )
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*>
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*> T
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*> (5) | H - Q S Z | / ( |H| n ulp )
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*>
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*> T
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*> (6) | T - Q P Z | / ( |T| n ulp )
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*>
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*> T
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*> (7) | I - QQ | / ( n ulp )
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*>
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*> T
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*> (8) | I - ZZ | / ( n ulp )
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*>
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*> (9) max over all left eigenvalue/-vector pairs (beta/alpha,l) of
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*>
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*> | l**H * (beta S - alpha P) | / ( ulp max( |beta S|, |alpha P| ) )
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*>
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*> (10) max over all left eigenvalue/-vector pairs (beta/alpha,l') of
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*> T
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*> | l'**H * (beta H - alpha T) | / ( ulp max( |beta H|, |alpha T| ) )
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*>
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*> where the eigenvectors l' are the result of passing Q to
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*> DTGEVC and back transforming (HOWMNY='B').
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*>
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*> (11) max over all right eigenvalue/-vector pairs (beta/alpha,r) of
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*>
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*> | (beta S - alpha T) r | / ( ulp max( |beta S|, |alpha T| ) )
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*>
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*> (12) max over all right eigenvalue/-vector pairs (beta/alpha,r') of
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*>
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*> | (beta H - alpha T) r' | / ( ulp max( |beta H|, |alpha T| ) )
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*>
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*> where the eigenvectors r' are the result of passing Z to
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*> DTGEVC and back transforming (HOWMNY='B').
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*>
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*> The last three test ratios will usually be small, but there is no
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*> mathematical requirement that they be so. They are therefore
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*> compared with THRESH only if TSTDIF is .TRUE.
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*>
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*> (13) | S(Q,Z computed) - S(Q,Z not computed) | / ( |S| ulp )
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*>
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*> (14) | P(Q,Z computed) - P(Q,Z not computed) | / ( |P| ulp )
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*>
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*> (15) max( |alpha(Q,Z computed) - alpha(Q,Z not computed)|/|S| ,
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*> |beta(Q,Z computed) - beta(Q,Z not computed)|/|P| ) / ulp
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*>
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*> In addition, the normalization of L and R are checked, and compared
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*> with the threshold THRSHN.
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*>
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*> Test Matrices
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*> ---- --------
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*>
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*> The sizes of the test matrices are specified by an array
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*> NN(1:NSIZES); the value of each element NN(j) specifies one size.
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*> The "types" are specified by a logical array DOTYPE( 1:NTYPES ); if
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*> DOTYPE(j) is .TRUE., then matrix type "j" will be generated.
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*> Currently, the list of possible types is:
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*>
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*> (1) ( 0, 0 ) (a pair of zero matrices)
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*>
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*> (2) ( I, 0 ) (an identity and a zero matrix)
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*>
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*> (3) ( 0, I ) (an identity and a zero matrix)
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*>
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*> (4) ( I, I ) (a pair of identity matrices)
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*>
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*> t t
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*> (5) ( J , J ) (a pair of transposed Jordan blocks)
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*>
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*> t ( I 0 )
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*> (6) ( X, Y ) where X = ( J 0 ) and Y = ( t )
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*> ( 0 I ) ( 0 J )
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*> and I is a k x k identity and J a (k+1)x(k+1)
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*> Jordan block; k=(N-1)/2
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*>
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*> (7) ( D, I ) where D is diag( 0, 1,..., N-1 ) (a diagonal
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*> matrix with those diagonal entries.)
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*> (8) ( I, D )
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*>
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*> (9) ( big*D, small*I ) where "big" is near overflow and small=1/big
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*>
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*> (10) ( small*D, big*I )
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*>
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*> (11) ( big*I, small*D )
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*>
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*> (12) ( small*I, big*D )
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*>
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*> (13) ( big*D, big*I )
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*>
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*> (14) ( small*D, small*I )
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*>
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*> (15) ( D1, D2 ) where D1 is diag( 0, 0, 1, ..., N-3, 0 ) and
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*> D2 is diag( 0, N-3, N-4,..., 1, 0, 0 )
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*> t t
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*> (16) U ( J , J ) V where U and V are random orthogonal matrices.
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*>
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*> (17) U ( T1, T2 ) V where T1 and T2 are upper triangular matrices
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*> with random O(1) entries above the diagonal
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*> and diagonal entries diag(T1) =
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*> ( 0, 0, 1, ..., N-3, 0 ) and diag(T2) =
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*> ( 0, N-3, N-4,..., 1, 0, 0 )
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*>
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*> (18) U ( T1, T2 ) V diag(T1) = ( 0, 0, 1, 1, s, ..., s, 0 )
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*> diag(T2) = ( 0, 1, 0, 1,..., 1, 0 )
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*> s = machine precision.
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*>
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*> (19) U ( T1, T2 ) V diag(T1)=( 0,0,1,1, 1-d, ..., 1-(N-5)*d=s, 0 )
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*> diag(T2) = ( 0, 1, 0, 1, ..., 1, 0 )
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*>
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*> N-5
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*> (20) U ( T1, T2 ) V diag(T1)=( 0, 0, 1, 1, a, ..., a =s, 0 )
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*> diag(T2) = ( 0, 1, 0, 1, ..., 1, 0, 0 )
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*>
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*> (21) U ( T1, T2 ) V diag(T1)=( 0, 0, 1, r1, r2, ..., r(N-4), 0 )
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*> diag(T2) = ( 0, 1, 0, 1, ..., 1, 0, 0 )
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*> where r1,..., r(N-4) are random.
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*>
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*> (22) U ( big*T1, small*T2 ) V diag(T1) = ( 0, 0, 1, ..., N-3, 0 )
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*> diag(T2) = ( 0, 1, ..., 1, 0, 0 )
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*>
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*> (23) U ( small*T1, big*T2 ) V diag(T1) = ( 0, 0, 1, ..., N-3, 0 )
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*> diag(T2) = ( 0, 1, ..., 1, 0, 0 )
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*>
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*> (24) U ( small*T1, small*T2 ) V diag(T1) = ( 0, 0, 1, ..., N-3, 0 )
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*> diag(T2) = ( 0, 1, ..., 1, 0, 0 )
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*>
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*> (25) U ( big*T1, big*T2 ) V diag(T1) = ( 0, 0, 1, ..., N-3, 0 )
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*> diag(T2) = ( 0, 1, ..., 1, 0, 0 )
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*>
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*> (26) U ( T1, T2 ) V where T1 and T2 are random upper-triangular
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*> matrices.
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*> \endverbatim
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*
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* Arguments:
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* ==========
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*
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*> \param[in] NSIZES
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*> \verbatim
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*> NSIZES is INTEGER
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*> The number of sizes of matrices to use. If it is zero,
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*> DCHKGG does nothing. It must be at least zero.
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*> \endverbatim
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*>
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*> \param[in] NN
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*> \verbatim
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*> NN is INTEGER array, dimension (NSIZES)
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*> An array containing the sizes to be used for the matrices.
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*> Zero values will be skipped. The values must be at least
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*> zero.
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*> \endverbatim
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*>
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*> \param[in] NTYPES
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*> \verbatim
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*> NTYPES is INTEGER
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*> The number of elements in DOTYPE. If it is zero, DCHKGG
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*> does nothing. It must be at least zero. If it is MAXTYP+1
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*> and NSIZES is 1, then an additional type, MAXTYP+1 is
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*> defined, which is to use whatever matrix is in A. This
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*> is only useful if DOTYPE(1:MAXTYP) is .FALSE. and
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*> DOTYPE(MAXTYP+1) is .TRUE. .
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*> \endverbatim
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*>
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*> \param[in] DOTYPE
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*> \verbatim
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*> DOTYPE is LOGICAL array, dimension (NTYPES)
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*> If DOTYPE(j) is .TRUE., then for each size in NN a
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*> matrix of that size and of type j will be generated.
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*> If NTYPES is smaller than the maximum number of types
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*> defined (PARAMETER MAXTYP), then types NTYPES+1 through
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*> MAXTYP will not be generated. If NTYPES is larger
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*> than MAXTYP, DOTYPE(MAXTYP+1) through DOTYPE(NTYPES)
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*> will be ignored.
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*> \endverbatim
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*>
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*> \param[in,out] ISEED
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*> \verbatim
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*> ISEED is INTEGER array, dimension (4)
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*> On entry ISEED specifies the seed of the random number
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*> generator. The array elements should be between 0 and 4095;
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*> if not they will be reduced mod 4096. Also, ISEED(4) must
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*> be odd. The random number generator uses a linear
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*> congruential sequence limited to small integers, and so
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*> should produce machine independent random numbers. The
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*> values of ISEED are changed on exit, and can be used in the
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*> next call to DCHKGG to continue the same random number
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*> sequence.
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*> \endverbatim
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*>
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*> \param[in] THRESH
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*> \verbatim
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*> THRESH is DOUBLE PRECISION
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*> A test will count as "failed" if the "error", computed as
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*> described above, exceeds THRESH. Note that the error is
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*> scaled to be O(1), so THRESH should be a reasonably small
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*> multiple of 1, e.g., 10 or 100. In particular, it should
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*> not depend on the precision (single vs. double) or the size
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*> of the matrix. It must be at least zero.
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*> \endverbatim
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*>
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*> \param[in] TSTDIF
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*> \verbatim
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*> TSTDIF is LOGICAL
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*> Specifies whether test ratios 13-15 will be computed and
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*> compared with THRESH.
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*> = .FALSE.: Only test ratios 1-12 will be computed and tested.
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*> Ratios 13-15 will be set to zero.
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*> = .TRUE.: All the test ratios 1-15 will be computed and
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*> tested.
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*> \endverbatim
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*>
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*> \param[in] THRSHN
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*> \verbatim
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*> THRSHN is DOUBLE PRECISION
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*> Threshold for reporting eigenvector normalization error.
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*> If the normalization of any eigenvector differs from 1 by
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*> more than THRSHN*ulp, then a special error message will be
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*> printed. (This is handled separately from the other tests,
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*> since only a compiler or programming error should cause an
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*> error message, at least if THRSHN is at least 5--10.)
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*> \endverbatim
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*>
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*> \param[in] NOUNIT
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*> \verbatim
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*> NOUNIT is INTEGER
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*> The FORTRAN unit number for printing out error messages
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*> (e.g., if a routine returns IINFO not equal to 0.)
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*> \endverbatim
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*>
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*> \param[in,out] A
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*> \verbatim
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*> A is DOUBLE PRECISION array, dimension
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*> (LDA, max(NN))
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*> Used to hold the original A matrix. Used as input only
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*> if NTYPES=MAXTYP+1, DOTYPE(1:MAXTYP)=.FALSE., and
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*> DOTYPE(MAXTYP+1)=.TRUE.
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*> \endverbatim
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*>
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*> \param[in] LDA
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*> \verbatim
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*> LDA is INTEGER
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*> The leading dimension of A, B, H, T, S1, P1, S2, and P2.
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*> It must be at least 1 and at least max( NN ).
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*> \endverbatim
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*>
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*> \param[in,out] B
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*> \verbatim
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*> B is DOUBLE PRECISION array, dimension
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*> (LDA, max(NN))
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*> Used to hold the original B matrix. Used as input only
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*> if NTYPES=MAXTYP+1, DOTYPE(1:MAXTYP)=.FALSE., and
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*> DOTYPE(MAXTYP+1)=.TRUE.
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*> \endverbatim
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*>
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*> \param[out] H
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*> \verbatim
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*> H is DOUBLE PRECISION array, dimension (LDA, max(NN))
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*> The upper Hessenberg matrix computed from A by DGGHRD.
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*> \endverbatim
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*>
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*> \param[out] T
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*> \verbatim
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*> T is DOUBLE PRECISION array, dimension (LDA, max(NN))
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*> The upper triangular matrix computed from B by DGGHRD.
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*> \endverbatim
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*>
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*> \param[out] S1
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*> \verbatim
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*> S1 is DOUBLE PRECISION array, dimension (LDA, max(NN))
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*> The Schur (block upper triangular) matrix computed from H by
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*> DHGEQZ when Q and Z are also computed.
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*> \endverbatim
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*>
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*> \param[out] S2
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*> \verbatim
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*> S2 is DOUBLE PRECISION array, dimension (LDA, max(NN))
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*> The Schur (block upper triangular) matrix computed from H by
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*> DHGEQZ when Q and Z are not computed.
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*> \endverbatim
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*>
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*> \param[out] P1
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*> \verbatim
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*> P1 is DOUBLE PRECISION array, dimension (LDA, max(NN))
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*> The upper triangular matrix computed from T by DHGEQZ
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*> when Q and Z are also computed.
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*> \endverbatim
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*>
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*> \param[out] P2
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*> \verbatim
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*> P2 is DOUBLE PRECISION array, dimension (LDA, max(NN))
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*> The upper triangular matrix computed from T by DHGEQZ
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*> when Q and Z are not computed.
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*> \endverbatim
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*>
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*> \param[out] U
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*> \verbatim
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*> U is DOUBLE PRECISION array, dimension (LDU, max(NN))
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*> The (left) orthogonal matrix computed by DGGHRD.
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*> \endverbatim
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*>
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*> \param[in] LDU
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*> \verbatim
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*> LDU is INTEGER
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*> The leading dimension of U, V, Q, Z, EVECTL, and EVEZTR. It
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*> must be at least 1 and at least max( NN ).
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*> \endverbatim
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*>
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*> \param[out] V
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*> \verbatim
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*> V is DOUBLE PRECISION array, dimension (LDU, max(NN))
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*> The (right) orthogonal matrix computed by DGGHRD.
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*> \endverbatim
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*>
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*> \param[out] Q
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*> \verbatim
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*> Q is DOUBLE PRECISION array, dimension (LDU, max(NN))
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*> The (left) orthogonal matrix computed by DHGEQZ.
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*> \endverbatim
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*>
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*> \param[out] Z
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*> \verbatim
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*> Z is DOUBLE PRECISION array, dimension (LDU, max(NN))
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*> The (left) orthogonal matrix computed by DHGEQZ.
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*> \endverbatim
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*>
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*> \param[out] ALPHR1
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*> \verbatim
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*> ALPHR1 is DOUBLE PRECISION array, dimension (max(NN))
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*> \endverbatim
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*>
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*> \param[out] ALPHI1
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*> \verbatim
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*> ALPHI1 is DOUBLE PRECISION array, dimension (max(NN))
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*> \endverbatim
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*>
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*> \param[out] BETA1
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*> \verbatim
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*> BETA1 is DOUBLE PRECISION array, dimension (max(NN))
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*>
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*> The generalized eigenvalues of (A,B) computed by DHGEQZ
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*> when Q, Z, and the full Schur matrices are computed.
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*> On exit, ( ALPHR1(k)+ALPHI1(k)*i ) / BETA1(k) is the k-th
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*> generalized eigenvalue of the matrices in A and B.
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*> \endverbatim
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*>
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*> \param[out] ALPHR3
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*> \verbatim
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*> ALPHR3 is DOUBLE PRECISION array, dimension (max(NN))
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*> \endverbatim
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*>
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*> \param[out] ALPHI3
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*> \verbatim
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*> ALPHI3 is DOUBLE PRECISION array, dimension (max(NN))
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*> \endverbatim
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*>
|
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*> \param[out] BETA3
|
|
*> \verbatim
|
|
*> BETA3 is DOUBLE PRECISION array, dimension (max(NN))
|
|
*> \endverbatim
|
|
*>
|
|
*> \param[out] EVECTL
|
|
*> \verbatim
|
|
*> EVECTL is DOUBLE PRECISION array, dimension (LDU, max(NN))
|
|
*> The (block lower triangular) left eigenvector matrix for
|
|
*> the matrices in S1 and P1. (See DTGEVC for the format.)
|
|
*> \endverbatim
|
|
*>
|
|
*> \param[out] EVECTR
|
|
*> \verbatim
|
|
*> EVECTR is DOUBLE PRECISION array, dimension (LDU, max(NN))
|
|
*> The (block upper triangular) right eigenvector matrix for
|
|
*> the matrices in S1 and P1. (See DTGEVC for the format.)
|
|
*> \endverbatim
|
|
*>
|
|
*> \param[out] WORK
|
|
*> \verbatim
|
|
*> WORK is DOUBLE PRECISION array, dimension (LWORK)
|
|
*> \endverbatim
|
|
*>
|
|
*> \param[in] LWORK
|
|
*> \verbatim
|
|
*> LWORK is INTEGER
|
|
*> The number of entries in WORK. This must be at least
|
|
*> max( 2 * N**2, 6*N, 1 ), for all N=NN(j).
|
|
*> \endverbatim
|
|
*>
|
|
*> \param[out] LLWORK
|
|
*> \verbatim
|
|
*> LLWORK is LOGICAL array, dimension (max(NN))
|
|
*> \endverbatim
|
|
*>
|
|
*> \param[out] RESULT
|
|
*> \verbatim
|
|
*> RESULT is DOUBLE PRECISION array, dimension (15)
|
|
*> The values computed by the tests described above.
|
|
*> The values are currently limited to 1/ulp, to avoid
|
|
*> overflow.
|
|
*> \endverbatim
|
|
*>
|
|
*> \param[out] INFO
|
|
*> \verbatim
|
|
*> INFO is INTEGER
|
|
*> = 0: successful exit
|
|
*> < 0: if INFO = -i, the i-th argument had an illegal value
|
|
*> > 0: A routine returned an error code. INFO is the
|
|
*> absolute value of the INFO value returned.
|
|
*> \endverbatim
|
|
*
|
|
* Authors:
|
|
* ========
|
|
*
|
|
*> \author Univ. of Tennessee
|
|
*> \author Univ. of California Berkeley
|
|
*> \author Univ. of Colorado Denver
|
|
*> \author NAG Ltd.
|
|
*
|
|
*> \date June 2016
|
|
*
|
|
*> \ingroup double_eig
|
|
*
|
|
* =====================================================================
|
|
SUBROUTINE DCHKGG( NSIZES, NN, NTYPES, DOTYPE, ISEED, THRESH,
|
|
$ TSTDIF, THRSHN, NOUNIT, A, LDA, B, H, T, S1,
|
|
$ S2, P1, P2, U, LDU, V, Q, Z, ALPHR1, ALPHI1,
|
|
$ BETA1, ALPHR3, ALPHI3, BETA3, EVECTL, EVECTR,
|
|
$ WORK, LWORK, LLWORK, RESULT, INFO )
|
|
*
|
|
* -- LAPACK test routine (version 3.7.0) --
|
|
* -- LAPACK is a software package provided by Univ. of Tennessee, --
|
|
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
|
|
* June 2016
|
|
*
|
|
* .. Scalar Arguments ..
|
|
LOGICAL TSTDIF
|
|
INTEGER INFO, LDA, LDU, LWORK, NOUNIT, NSIZES, NTYPES
|
|
DOUBLE PRECISION THRESH, THRSHN
|
|
* ..
|
|
* .. Array Arguments ..
|
|
LOGICAL DOTYPE( * ), LLWORK( * )
|
|
INTEGER ISEED( 4 ), NN( * )
|
|
DOUBLE PRECISION A( LDA, * ), ALPHI1( * ), ALPHI3( * ),
|
|
$ ALPHR1( * ), ALPHR3( * ), B( LDA, * ),
|
|
$ BETA1( * ), BETA3( * ), EVECTL( LDU, * ),
|
|
$ EVECTR( LDU, * ), H( LDA, * ), P1( LDA, * ),
|
|
$ P2( LDA, * ), Q( LDU, * ), RESULT( 15 ),
|
|
$ S1( LDA, * ), S2( LDA, * ), T( LDA, * ),
|
|
$ U( LDU, * ), V( LDU, * ), WORK( * ),
|
|
$ Z( LDU, * )
|
|
* ..
|
|
*
|
|
* =====================================================================
|
|
*
|
|
* .. Parameters ..
|
|
DOUBLE PRECISION ZERO, ONE
|
|
PARAMETER ( ZERO = 0.0D0, ONE = 1.0D0 )
|
|
INTEGER MAXTYP
|
|
PARAMETER ( MAXTYP = 26 )
|
|
* ..
|
|
* .. Local Scalars ..
|
|
LOGICAL BADNN
|
|
INTEGER I1, IADD, IINFO, IN, J, JC, JR, JSIZE, JTYPE,
|
|
$ LWKOPT, MTYPES, N, N1, NERRS, NMATS, NMAX,
|
|
$ NTEST, NTESTT
|
|
DOUBLE PRECISION ANORM, BNORM, SAFMAX, SAFMIN, TEMP1, TEMP2,
|
|
$ ULP, ULPINV
|
|
* ..
|
|
* .. Local Arrays ..
|
|
INTEGER IASIGN( MAXTYP ), IBSIGN( MAXTYP ),
|
|
$ IOLDSD( 4 ), KADD( 6 ), KAMAGN( MAXTYP ),
|
|
$ KATYPE( MAXTYP ), KAZERO( MAXTYP ),
|
|
$ KBMAGN( MAXTYP ), KBTYPE( MAXTYP ),
|
|
$ KBZERO( MAXTYP ), KCLASS( MAXTYP ),
|
|
$ KTRIAN( MAXTYP ), KZ1( 6 ), KZ2( 6 )
|
|
DOUBLE PRECISION DUMMA( 4 ), RMAGN( 0: 3 )
|
|
* ..
|
|
* .. External Functions ..
|
|
DOUBLE PRECISION DLAMCH, DLANGE, DLARND
|
|
EXTERNAL DLAMCH, DLANGE, DLARND
|
|
* ..
|
|
* .. External Subroutines ..
|
|
EXTERNAL DGEQR2, DGET51, DGET52, DGGHRD, DHGEQZ, DLABAD,
|
|
$ DLACPY, DLARFG, DLASET, DLASUM, DLATM4, DORM2R,
|
|
$ DTGEVC, XERBLA
|
|
* ..
|
|
* .. Intrinsic Functions ..
|
|
INTRINSIC ABS, DBLE, MAX, MIN, SIGN
|
|
* ..
|
|
* .. Data statements ..
|
|
DATA KCLASS / 15*1, 10*2, 1*3 /
|
|
DATA KZ1 / 0, 1, 2, 1, 3, 3 /
|
|
DATA KZ2 / 0, 0, 1, 2, 1, 1 /
|
|
DATA KADD / 0, 0, 0, 0, 3, 2 /
|
|
DATA KATYPE / 0, 1, 0, 1, 2, 3, 4, 1, 4, 4, 1, 1, 4,
|
|
$ 4, 4, 2, 4, 5, 8, 7, 9, 4*4, 0 /
|
|
DATA KBTYPE / 0, 0, 1, 1, 2, -3, 1, 4, 1, 1, 4, 4,
|
|
$ 1, 1, -4, 2, -4, 8*8, 0 /
|
|
DATA KAZERO / 6*1, 2, 1, 2*2, 2*1, 2*2, 3, 1, 3,
|
|
$ 4*5, 4*3, 1 /
|
|
DATA KBZERO / 6*1, 1, 2, 2*1, 2*2, 2*1, 4, 1, 4,
|
|
$ 4*6, 4*4, 1 /
|
|
DATA KAMAGN / 8*1, 2, 3, 2, 3, 2, 3, 7*1, 2, 3, 3,
|
|
$ 2, 1 /
|
|
DATA KBMAGN / 8*1, 3, 2, 3, 2, 2, 3, 7*1, 3, 2, 3,
|
|
$ 2, 1 /
|
|
DATA KTRIAN / 16*0, 10*1 /
|
|
DATA IASIGN / 6*0, 2, 0, 2*2, 2*0, 3*2, 0, 2, 3*0,
|
|
$ 5*2, 0 /
|
|
DATA IBSIGN / 7*0, 2, 2*0, 2*2, 2*0, 2, 0, 2, 9*0 /
|
|
* ..
|
|
* .. Executable Statements ..
|
|
*
|
|
* Check for errors
|
|
*
|
|
INFO = 0
|
|
*
|
|
BADNN = .FALSE.
|
|
NMAX = 1
|
|
DO 10 J = 1, NSIZES
|
|
NMAX = MAX( NMAX, NN( J ) )
|
|
IF( NN( J ).LT.0 )
|
|
$ BADNN = .TRUE.
|
|
10 CONTINUE
|
|
*
|
|
* Maximum blocksize and shift -- we assume that blocksize and number
|
|
* of shifts are monotone increasing functions of N.
|
|
*
|
|
LWKOPT = MAX( 6*NMAX, 2*NMAX*NMAX, 1 )
|
|
*
|
|
* Check for errors
|
|
*
|
|
IF( NSIZES.LT.0 ) THEN
|
|
INFO = -1
|
|
ELSE IF( BADNN ) THEN
|
|
INFO = -2
|
|
ELSE IF( NTYPES.LT.0 ) THEN
|
|
INFO = -3
|
|
ELSE IF( THRESH.LT.ZERO ) THEN
|
|
INFO = -6
|
|
ELSE IF( LDA.LE.1 .OR. LDA.LT.NMAX ) THEN
|
|
INFO = -10
|
|
ELSE IF( LDU.LE.1 .OR. LDU.LT.NMAX ) THEN
|
|
INFO = -19
|
|
ELSE IF( LWKOPT.GT.LWORK ) THEN
|
|
INFO = -30
|
|
END IF
|
|
*
|
|
IF( INFO.NE.0 ) THEN
|
|
CALL XERBLA( 'DCHKGG', -INFO )
|
|
RETURN
|
|
END IF
|
|
*
|
|
* Quick return if possible
|
|
*
|
|
IF( NSIZES.EQ.0 .OR. NTYPES.EQ.0 )
|
|
$ RETURN
|
|
*
|
|
SAFMIN = DLAMCH( 'Safe minimum' )
|
|
ULP = DLAMCH( 'Epsilon' )*DLAMCH( 'Base' )
|
|
SAFMIN = SAFMIN / ULP
|
|
SAFMAX = ONE / SAFMIN
|
|
CALL DLABAD( SAFMIN, SAFMAX )
|
|
ULPINV = ONE / ULP
|
|
*
|
|
* The values RMAGN(2:3) depend on N, see below.
|
|
*
|
|
RMAGN( 0 ) = ZERO
|
|
RMAGN( 1 ) = ONE
|
|
*
|
|
* Loop over sizes, types
|
|
*
|
|
NTESTT = 0
|
|
NERRS = 0
|
|
NMATS = 0
|
|
*
|
|
DO 240 JSIZE = 1, NSIZES
|
|
N = NN( JSIZE )
|
|
N1 = MAX( 1, N )
|
|
RMAGN( 2 ) = SAFMAX*ULP / DBLE( N1 )
|
|
RMAGN( 3 ) = SAFMIN*ULPINV*N1
|
|
*
|
|
IF( NSIZES.NE.1 ) THEN
|
|
MTYPES = MIN( MAXTYP, NTYPES )
|
|
ELSE
|
|
MTYPES = MIN( MAXTYP+1, NTYPES )
|
|
END IF
|
|
*
|
|
DO 230 JTYPE = 1, MTYPES
|
|
IF( .NOT.DOTYPE( JTYPE ) )
|
|
$ GO TO 230
|
|
NMATS = NMATS + 1
|
|
NTEST = 0
|
|
*
|
|
* Save ISEED in case of an error.
|
|
*
|
|
DO 20 J = 1, 4
|
|
IOLDSD( J ) = ISEED( J )
|
|
20 CONTINUE
|
|
*
|
|
* Initialize RESULT
|
|
*
|
|
DO 30 J = 1, 15
|
|
RESULT( J ) = ZERO
|
|
30 CONTINUE
|
|
*
|
|
* Compute A and B
|
|
*
|
|
* Description of control parameters:
|
|
*
|
|
* KZLASS: =1 means w/o rotation, =2 means w/ rotation,
|
|
* =3 means random.
|
|
* KATYPE: the "type" to be passed to DLATM4 for computing A.
|
|
* KAZERO: the pattern of zeros on the diagonal for A:
|
|
* =1: ( xxx ), =2: (0, xxx ) =3: ( 0, 0, xxx, 0 ),
|
|
* =4: ( 0, xxx, 0, 0 ), =5: ( 0, 0, 1, xxx, 0 ),
|
|
* =6: ( 0, 1, 0, xxx, 0 ). (xxx means a string of
|
|
* non-zero entries.)
|
|
* KAMAGN: the magnitude of the matrix: =0: zero, =1: O(1),
|
|
* =2: large, =3: small.
|
|
* IASIGN: 1 if the diagonal elements of A are to be
|
|
* multiplied by a random magnitude 1 number, =2 if
|
|
* randomly chosen diagonal blocks are to be rotated
|
|
* to form 2x2 blocks.
|
|
* KBTYPE, KBZERO, KBMAGN, IBSIGN: the same, but for B.
|
|
* KTRIAN: =0: don't fill in the upper triangle, =1: do.
|
|
* KZ1, KZ2, KADD: used to implement KAZERO and KBZERO.
|
|
* RMAGN: used to implement KAMAGN and KBMAGN.
|
|
*
|
|
IF( MTYPES.GT.MAXTYP )
|
|
$ GO TO 110
|
|
IINFO = 0
|
|
IF( KCLASS( JTYPE ).LT.3 ) THEN
|
|
*
|
|
* Generate A (w/o rotation)
|
|
*
|
|
IF( ABS( KATYPE( JTYPE ) ).EQ.3 ) THEN
|
|
IN = 2*( ( N-1 ) / 2 ) + 1
|
|
IF( IN.NE.N )
|
|
$ CALL DLASET( 'Full', N, N, ZERO, ZERO, A, LDA )
|
|
ELSE
|
|
IN = N
|
|
END IF
|
|
CALL DLATM4( KATYPE( JTYPE ), IN, KZ1( KAZERO( JTYPE ) ),
|
|
$ KZ2( KAZERO( JTYPE ) ), IASIGN( JTYPE ),
|
|
$ RMAGN( KAMAGN( JTYPE ) ), ULP,
|
|
$ RMAGN( KTRIAN( JTYPE )*KAMAGN( JTYPE ) ), 2,
|
|
$ ISEED, A, LDA )
|
|
IADD = KADD( KAZERO( JTYPE ) )
|
|
IF( IADD.GT.0 .AND. IADD.LE.N )
|
|
$ A( IADD, IADD ) = RMAGN( KAMAGN( JTYPE ) )
|
|
*
|
|
* Generate B (w/o rotation)
|
|
*
|
|
IF( ABS( KBTYPE( JTYPE ) ).EQ.3 ) THEN
|
|
IN = 2*( ( N-1 ) / 2 ) + 1
|
|
IF( IN.NE.N )
|
|
$ CALL DLASET( 'Full', N, N, ZERO, ZERO, B, LDA )
|
|
ELSE
|
|
IN = N
|
|
END IF
|
|
CALL DLATM4( KBTYPE( JTYPE ), IN, KZ1( KBZERO( JTYPE ) ),
|
|
$ KZ2( KBZERO( JTYPE ) ), IBSIGN( JTYPE ),
|
|
$ RMAGN( KBMAGN( JTYPE ) ), ONE,
|
|
$ RMAGN( KTRIAN( JTYPE )*KBMAGN( JTYPE ) ), 2,
|
|
$ ISEED, B, LDA )
|
|
IADD = KADD( KBZERO( JTYPE ) )
|
|
IF( IADD.NE.0 .AND. IADD.LE.N )
|
|
$ B( IADD, IADD ) = RMAGN( KBMAGN( JTYPE ) )
|
|
*
|
|
IF( KCLASS( JTYPE ).EQ.2 .AND. N.GT.0 ) THEN
|
|
*
|
|
* Include rotations
|
|
*
|
|
* Generate U, V as Householder transformations times
|
|
* a diagonal matrix.
|
|
*
|
|
DO 50 JC = 1, N - 1
|
|
DO 40 JR = JC, N
|
|
U( JR, JC ) = DLARND( 3, ISEED )
|
|
V( JR, JC ) = DLARND( 3, ISEED )
|
|
40 CONTINUE
|
|
CALL DLARFG( N+1-JC, U( JC, JC ), U( JC+1, JC ), 1,
|
|
$ WORK( JC ) )
|
|
WORK( 2*N+JC ) = SIGN( ONE, U( JC, JC ) )
|
|
U( JC, JC ) = ONE
|
|
CALL DLARFG( N+1-JC, V( JC, JC ), V( JC+1, JC ), 1,
|
|
$ WORK( N+JC ) )
|
|
WORK( 3*N+JC ) = SIGN( ONE, V( JC, JC ) )
|
|
V( JC, JC ) = ONE
|
|
50 CONTINUE
|
|
U( N, N ) = ONE
|
|
WORK( N ) = ZERO
|
|
WORK( 3*N ) = SIGN( ONE, DLARND( 2, ISEED ) )
|
|
V( N, N ) = ONE
|
|
WORK( 2*N ) = ZERO
|
|
WORK( 4*N ) = SIGN( ONE, DLARND( 2, ISEED ) )
|
|
*
|
|
* Apply the diagonal matrices
|
|
*
|
|
DO 70 JC = 1, N
|
|
DO 60 JR = 1, N
|
|
A( JR, JC ) = WORK( 2*N+JR )*WORK( 3*N+JC )*
|
|
$ A( JR, JC )
|
|
B( JR, JC ) = WORK( 2*N+JR )*WORK( 3*N+JC )*
|
|
$ B( JR, JC )
|
|
60 CONTINUE
|
|
70 CONTINUE
|
|
CALL DORM2R( 'L', 'N', N, N, N-1, U, LDU, WORK, A,
|
|
$ LDA, WORK( 2*N+1 ), IINFO )
|
|
IF( IINFO.NE.0 )
|
|
$ GO TO 100
|
|
CALL DORM2R( 'R', 'T', N, N, N-1, V, LDU, WORK( N+1 ),
|
|
$ A, LDA, WORK( 2*N+1 ), IINFO )
|
|
IF( IINFO.NE.0 )
|
|
$ GO TO 100
|
|
CALL DORM2R( 'L', 'N', N, N, N-1, U, LDU, WORK, B,
|
|
$ LDA, WORK( 2*N+1 ), IINFO )
|
|
IF( IINFO.NE.0 )
|
|
$ GO TO 100
|
|
CALL DORM2R( 'R', 'T', N, N, N-1, V, LDU, WORK( N+1 ),
|
|
$ B, LDA, WORK( 2*N+1 ), IINFO )
|
|
IF( IINFO.NE.0 )
|
|
$ GO TO 100
|
|
END IF
|
|
ELSE
|
|
*
|
|
* Random matrices
|
|
*
|
|
DO 90 JC = 1, N
|
|
DO 80 JR = 1, N
|
|
A( JR, JC ) = RMAGN( KAMAGN( JTYPE ) )*
|
|
$ DLARND( 2, ISEED )
|
|
B( JR, JC ) = RMAGN( KBMAGN( JTYPE ) )*
|
|
$ DLARND( 2, ISEED )
|
|
80 CONTINUE
|
|
90 CONTINUE
|
|
END IF
|
|
*
|
|
ANORM = DLANGE( '1', N, N, A, LDA, WORK )
|
|
BNORM = DLANGE( '1', N, N, B, LDA, WORK )
|
|
*
|
|
100 CONTINUE
|
|
*
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'Generator', IINFO, N, JTYPE,
|
|
$ IOLDSD
|
|
INFO = ABS( IINFO )
|
|
RETURN
|
|
END IF
|
|
*
|
|
110 CONTINUE
|
|
*
|
|
* Call DGEQR2, DORM2R, and DGGHRD to compute H, T, U, and V
|
|
*
|
|
CALL DLACPY( ' ', N, N, A, LDA, H, LDA )
|
|
CALL DLACPY( ' ', N, N, B, LDA, T, LDA )
|
|
NTEST = 1
|
|
RESULT( 1 ) = ULPINV
|
|
*
|
|
CALL DGEQR2( N, N, T, LDA, WORK, WORK( N+1 ), IINFO )
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'DGEQR2', IINFO, N, JTYPE,
|
|
$ IOLDSD
|
|
INFO = ABS( IINFO )
|
|
GO TO 210
|
|
END IF
|
|
*
|
|
CALL DORM2R( 'L', 'T', N, N, N, T, LDA, WORK, H, LDA,
|
|
$ WORK( N+1 ), IINFO )
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'DORM2R', IINFO, N, JTYPE,
|
|
$ IOLDSD
|
|
INFO = ABS( IINFO )
|
|
GO TO 210
|
|
END IF
|
|
*
|
|
CALL DLASET( 'Full', N, N, ZERO, ONE, U, LDU )
|
|
CALL DORM2R( 'R', 'N', N, N, N, T, LDA, WORK, U, LDU,
|
|
$ WORK( N+1 ), IINFO )
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'DORM2R', IINFO, N, JTYPE,
|
|
$ IOLDSD
|
|
INFO = ABS( IINFO )
|
|
GO TO 210
|
|
END IF
|
|
*
|
|
CALL DGGHRD( 'V', 'I', N, 1, N, H, LDA, T, LDA, U, LDU, V,
|
|
$ LDU, IINFO )
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'DGGHRD', IINFO, N, JTYPE,
|
|
$ IOLDSD
|
|
INFO = ABS( IINFO )
|
|
GO TO 210
|
|
END IF
|
|
NTEST = 4
|
|
*
|
|
* Do tests 1--4
|
|
*
|
|
CALL DGET51( 1, N, A, LDA, H, LDA, U, LDU, V, LDU, WORK,
|
|
$ RESULT( 1 ) )
|
|
CALL DGET51( 1, N, B, LDA, T, LDA, U, LDU, V, LDU, WORK,
|
|
$ RESULT( 2 ) )
|
|
CALL DGET51( 3, N, B, LDA, T, LDA, U, LDU, U, LDU, WORK,
|
|
$ RESULT( 3 ) )
|
|
CALL DGET51( 3, N, B, LDA, T, LDA, V, LDU, V, LDU, WORK,
|
|
$ RESULT( 4 ) )
|
|
*
|
|
* Call DHGEQZ to compute S1, P1, S2, P2, Q, and Z, do tests.
|
|
*
|
|
* Compute T1 and UZ
|
|
*
|
|
* Eigenvalues only
|
|
*
|
|
CALL DLACPY( ' ', N, N, H, LDA, S2, LDA )
|
|
CALL DLACPY( ' ', N, N, T, LDA, P2, LDA )
|
|
NTEST = 5
|
|
RESULT( 5 ) = ULPINV
|
|
*
|
|
CALL DHGEQZ( 'E', 'N', 'N', N, 1, N, S2, LDA, P2, LDA,
|
|
$ ALPHR3, ALPHI3, BETA3, Q, LDU, Z, LDU, WORK,
|
|
$ LWORK, IINFO )
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'DHGEQZ(E)', IINFO, N, JTYPE,
|
|
$ IOLDSD
|
|
INFO = ABS( IINFO )
|
|
GO TO 210
|
|
END IF
|
|
*
|
|
* Eigenvalues and Full Schur Form
|
|
*
|
|
CALL DLACPY( ' ', N, N, H, LDA, S2, LDA )
|
|
CALL DLACPY( ' ', N, N, T, LDA, P2, LDA )
|
|
*
|
|
CALL DHGEQZ( 'S', 'N', 'N', N, 1, N, S2, LDA, P2, LDA,
|
|
$ ALPHR1, ALPHI1, BETA1, Q, LDU, Z, LDU, WORK,
|
|
$ LWORK, IINFO )
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'DHGEQZ(S)', IINFO, N, JTYPE,
|
|
$ IOLDSD
|
|
INFO = ABS( IINFO )
|
|
GO TO 210
|
|
END IF
|
|
*
|
|
* Eigenvalues, Schur Form, and Schur Vectors
|
|
*
|
|
CALL DLACPY( ' ', N, N, H, LDA, S1, LDA )
|
|
CALL DLACPY( ' ', N, N, T, LDA, P1, LDA )
|
|
*
|
|
CALL DHGEQZ( 'S', 'I', 'I', N, 1, N, S1, LDA, P1, LDA,
|
|
$ ALPHR1, ALPHI1, BETA1, Q, LDU, Z, LDU, WORK,
|
|
$ LWORK, IINFO )
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'DHGEQZ(V)', IINFO, N, JTYPE,
|
|
$ IOLDSD
|
|
INFO = ABS( IINFO )
|
|
GO TO 210
|
|
END IF
|
|
*
|
|
NTEST = 8
|
|
*
|
|
* Do Tests 5--8
|
|
*
|
|
CALL DGET51( 1, N, H, LDA, S1, LDA, Q, LDU, Z, LDU, WORK,
|
|
$ RESULT( 5 ) )
|
|
CALL DGET51( 1, N, T, LDA, P1, LDA, Q, LDU, Z, LDU, WORK,
|
|
$ RESULT( 6 ) )
|
|
CALL DGET51( 3, N, T, LDA, P1, LDA, Q, LDU, Q, LDU, WORK,
|
|
$ RESULT( 7 ) )
|
|
CALL DGET51( 3, N, T, LDA, P1, LDA, Z, LDU, Z, LDU, WORK,
|
|
$ RESULT( 8 ) )
|
|
*
|
|
* Compute the Left and Right Eigenvectors of (S1,P1)
|
|
*
|
|
* 9: Compute the left eigenvector Matrix without
|
|
* back transforming:
|
|
*
|
|
NTEST = 9
|
|
RESULT( 9 ) = ULPINV
|
|
*
|
|
* To test "SELECT" option, compute half of the eigenvectors
|
|
* in one call, and half in another
|
|
*
|
|
I1 = N / 2
|
|
DO 120 J = 1, I1
|
|
LLWORK( J ) = .TRUE.
|
|
120 CONTINUE
|
|
DO 130 J = I1 + 1, N
|
|
LLWORK( J ) = .FALSE.
|
|
130 CONTINUE
|
|
*
|
|
CALL DTGEVC( 'L', 'S', LLWORK, N, S1, LDA, P1, LDA, EVECTL,
|
|
$ LDU, DUMMA, LDU, N, IN, WORK, IINFO )
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'DTGEVC(L,S1)', IINFO, N,
|
|
$ JTYPE, IOLDSD
|
|
INFO = ABS( IINFO )
|
|
GO TO 210
|
|
END IF
|
|
*
|
|
I1 = IN
|
|
DO 140 J = 1, I1
|
|
LLWORK( J ) = .FALSE.
|
|
140 CONTINUE
|
|
DO 150 J = I1 + 1, N
|
|
LLWORK( J ) = .TRUE.
|
|
150 CONTINUE
|
|
*
|
|
CALL DTGEVC( 'L', 'S', LLWORK, N, S1, LDA, P1, LDA,
|
|
$ EVECTL( 1, I1+1 ), LDU, DUMMA, LDU, N, IN,
|
|
$ WORK, IINFO )
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'DTGEVC(L,S2)', IINFO, N,
|
|
$ JTYPE, IOLDSD
|
|
INFO = ABS( IINFO )
|
|
GO TO 210
|
|
END IF
|
|
*
|
|
CALL DGET52( .TRUE., N, S1, LDA, P1, LDA, EVECTL, LDU,
|
|
$ ALPHR1, ALPHI1, BETA1, WORK, DUMMA( 1 ) )
|
|
RESULT( 9 ) = DUMMA( 1 )
|
|
IF( DUMMA( 2 ).GT.THRSHN ) THEN
|
|
WRITE( NOUNIT, FMT = 9998 )'Left', 'DTGEVC(HOWMNY=S)',
|
|
$ DUMMA( 2 ), N, JTYPE, IOLDSD
|
|
END IF
|
|
*
|
|
* 10: Compute the left eigenvector Matrix with
|
|
* back transforming:
|
|
*
|
|
NTEST = 10
|
|
RESULT( 10 ) = ULPINV
|
|
CALL DLACPY( 'F', N, N, Q, LDU, EVECTL, LDU )
|
|
CALL DTGEVC( 'L', 'B', LLWORK, N, S1, LDA, P1, LDA, EVECTL,
|
|
$ LDU, DUMMA, LDU, N, IN, WORK, IINFO )
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'DTGEVC(L,B)', IINFO, N,
|
|
$ JTYPE, IOLDSD
|
|
INFO = ABS( IINFO )
|
|
GO TO 210
|
|
END IF
|
|
*
|
|
CALL DGET52( .TRUE., N, H, LDA, T, LDA, EVECTL, LDU, ALPHR1,
|
|
$ ALPHI1, BETA1, WORK, DUMMA( 1 ) )
|
|
RESULT( 10 ) = DUMMA( 1 )
|
|
IF( DUMMA( 2 ).GT.THRSHN ) THEN
|
|
WRITE( NOUNIT, FMT = 9998 )'Left', 'DTGEVC(HOWMNY=B)',
|
|
$ DUMMA( 2 ), N, JTYPE, IOLDSD
|
|
END IF
|
|
*
|
|
* 11: Compute the right eigenvector Matrix without
|
|
* back transforming:
|
|
*
|
|
NTEST = 11
|
|
RESULT( 11 ) = ULPINV
|
|
*
|
|
* To test "SELECT" option, compute half of the eigenvectors
|
|
* in one call, and half in another
|
|
*
|
|
I1 = N / 2
|
|
DO 160 J = 1, I1
|
|
LLWORK( J ) = .TRUE.
|
|
160 CONTINUE
|
|
DO 170 J = I1 + 1, N
|
|
LLWORK( J ) = .FALSE.
|
|
170 CONTINUE
|
|
*
|
|
CALL DTGEVC( 'R', 'S', LLWORK, N, S1, LDA, P1, LDA, DUMMA,
|
|
$ LDU, EVECTR, LDU, N, IN, WORK, IINFO )
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'DTGEVC(R,S1)', IINFO, N,
|
|
$ JTYPE, IOLDSD
|
|
INFO = ABS( IINFO )
|
|
GO TO 210
|
|
END IF
|
|
*
|
|
I1 = IN
|
|
DO 180 J = 1, I1
|
|
LLWORK( J ) = .FALSE.
|
|
180 CONTINUE
|
|
DO 190 J = I1 + 1, N
|
|
LLWORK( J ) = .TRUE.
|
|
190 CONTINUE
|
|
*
|
|
CALL DTGEVC( 'R', 'S', LLWORK, N, S1, LDA, P1, LDA, DUMMA,
|
|
$ LDU, EVECTR( 1, I1+1 ), LDU, N, IN, WORK,
|
|
$ IINFO )
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'DTGEVC(R,S2)', IINFO, N,
|
|
$ JTYPE, IOLDSD
|
|
INFO = ABS( IINFO )
|
|
GO TO 210
|
|
END IF
|
|
*
|
|
CALL DGET52( .FALSE., N, S1, LDA, P1, LDA, EVECTR, LDU,
|
|
$ ALPHR1, ALPHI1, BETA1, WORK, DUMMA( 1 ) )
|
|
RESULT( 11 ) = DUMMA( 1 )
|
|
IF( DUMMA( 2 ).GT.THRESH ) THEN
|
|
WRITE( NOUNIT, FMT = 9998 )'Right', 'DTGEVC(HOWMNY=S)',
|
|
$ DUMMA( 2 ), N, JTYPE, IOLDSD
|
|
END IF
|
|
*
|
|
* 12: Compute the right eigenvector Matrix with
|
|
* back transforming:
|
|
*
|
|
NTEST = 12
|
|
RESULT( 12 ) = ULPINV
|
|
CALL DLACPY( 'F', N, N, Z, LDU, EVECTR, LDU )
|
|
CALL DTGEVC( 'R', 'B', LLWORK, N, S1, LDA, P1, LDA, DUMMA,
|
|
$ LDU, EVECTR, LDU, N, IN, WORK, IINFO )
|
|
IF( IINFO.NE.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9999 )'DTGEVC(R,B)', IINFO, N,
|
|
$ JTYPE, IOLDSD
|
|
INFO = ABS( IINFO )
|
|
GO TO 210
|
|
END IF
|
|
*
|
|
CALL DGET52( .FALSE., N, H, LDA, T, LDA, EVECTR, LDU,
|
|
$ ALPHR1, ALPHI1, BETA1, WORK, DUMMA( 1 ) )
|
|
RESULT( 12 ) = DUMMA( 1 )
|
|
IF( DUMMA( 2 ).GT.THRESH ) THEN
|
|
WRITE( NOUNIT, FMT = 9998 )'Right', 'DTGEVC(HOWMNY=B)',
|
|
$ DUMMA( 2 ), N, JTYPE, IOLDSD
|
|
END IF
|
|
*
|
|
* Tests 13--15 are done only on request
|
|
*
|
|
IF( TSTDIF ) THEN
|
|
*
|
|
* Do Tests 13--14
|
|
*
|
|
CALL DGET51( 2, N, S1, LDA, S2, LDA, Q, LDU, Z, LDU,
|
|
$ WORK, RESULT( 13 ) )
|
|
CALL DGET51( 2, N, P1, LDA, P2, LDA, Q, LDU, Z, LDU,
|
|
$ WORK, RESULT( 14 ) )
|
|
*
|
|
* Do Test 15
|
|
*
|
|
TEMP1 = ZERO
|
|
TEMP2 = ZERO
|
|
DO 200 J = 1, N
|
|
TEMP1 = MAX( TEMP1, ABS( ALPHR1( J )-ALPHR3( J ) )+
|
|
$ ABS( ALPHI1( J )-ALPHI3( J ) ) )
|
|
TEMP2 = MAX( TEMP2, ABS( BETA1( J )-BETA3( J ) ) )
|
|
200 CONTINUE
|
|
*
|
|
TEMP1 = TEMP1 / MAX( SAFMIN, ULP*MAX( TEMP1, ANORM ) )
|
|
TEMP2 = TEMP2 / MAX( SAFMIN, ULP*MAX( TEMP2, BNORM ) )
|
|
RESULT( 15 ) = MAX( TEMP1, TEMP2 )
|
|
NTEST = 15
|
|
ELSE
|
|
RESULT( 13 ) = ZERO
|
|
RESULT( 14 ) = ZERO
|
|
RESULT( 15 ) = ZERO
|
|
NTEST = 12
|
|
END IF
|
|
*
|
|
* End of Loop -- Check for RESULT(j) > THRESH
|
|
*
|
|
210 CONTINUE
|
|
*
|
|
NTESTT = NTESTT + NTEST
|
|
*
|
|
* Print out tests which fail.
|
|
*
|
|
DO 220 JR = 1, NTEST
|
|
IF( RESULT( JR ).GE.THRESH ) THEN
|
|
*
|
|
* If this is the first test to fail,
|
|
* print a header to the data file.
|
|
*
|
|
IF( NERRS.EQ.0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9997 )'DGG'
|
|
*
|
|
* Matrix types
|
|
*
|
|
WRITE( NOUNIT, FMT = 9996 )
|
|
WRITE( NOUNIT, FMT = 9995 )
|
|
WRITE( NOUNIT, FMT = 9994 )'Orthogonal'
|
|
*
|
|
* Tests performed
|
|
*
|
|
WRITE( NOUNIT, FMT = 9993 )'orthogonal', '''',
|
|
$ 'transpose', ( '''', J = 1, 10 )
|
|
*
|
|
END IF
|
|
NERRS = NERRS + 1
|
|
IF( RESULT( JR ).LT.10000.0D0 ) THEN
|
|
WRITE( NOUNIT, FMT = 9992 )N, JTYPE, IOLDSD, JR,
|
|
$ RESULT( JR )
|
|
ELSE
|
|
WRITE( NOUNIT, FMT = 9991 )N, JTYPE, IOLDSD, JR,
|
|
$ RESULT( JR )
|
|
END IF
|
|
END IF
|
|
220 CONTINUE
|
|
*
|
|
230 CONTINUE
|
|
240 CONTINUE
|
|
*
|
|
* Summary
|
|
*
|
|
CALL DLASUM( 'DGG', NOUNIT, NERRS, NTESTT )
|
|
RETURN
|
|
*
|
|
9999 FORMAT( ' DCHKGG: ', A, ' returned INFO=', I6, '.', / 9X, 'N=',
|
|
$ I6, ', JTYPE=', I6, ', ISEED=(', 3( I5, ',' ), I5, ')' )
|
|
*
|
|
9998 FORMAT( ' DCHKGG: ', A, ' Eigenvectors from ', A, ' incorrectly ',
|
|
$ 'normalized.', / ' Bits of error=', 0P, G10.3, ',', 9X,
|
|
$ 'N=', I6, ', JTYPE=', I6, ', ISEED=(', 3( I5, ',' ), I5,
|
|
$ ')' )
|
|
*
|
|
9997 FORMAT( / 1X, A3, ' -- Real Generalized eigenvalue problem' )
|
|
*
|
|
9996 FORMAT( ' Matrix types (see DCHKGG for details): ' )
|
|
*
|
|
9995 FORMAT( ' Special Matrices:', 23X,
|
|
$ '(J''=transposed Jordan block)',
|
|
$ / ' 1=(0,0) 2=(I,0) 3=(0,I) 4=(I,I) 5=(J'',J'') ',
|
|
$ '6=(diag(J'',I), diag(I,J''))', / ' Diagonal Matrices: ( ',
|
|
$ 'D=diag(0,1,2,...) )', / ' 7=(D,I) 9=(large*D, small*I',
|
|
$ ') 11=(large*I, small*D) 13=(large*D, large*I)', /
|
|
$ ' 8=(I,D) 10=(small*D, large*I) 12=(small*I, large*D) ',
|
|
$ ' 14=(small*D, small*I)', / ' 15=(D, reversed D)' )
|
|
9994 FORMAT( ' Matrices Rotated by Random ', A, ' Matrices U, V:',
|
|
$ / ' 16=Transposed Jordan Blocks 19=geometric ',
|
|
$ 'alpha, beta=0,1', / ' 17=arithm. alpha&beta ',
|
|
$ ' 20=arithmetic alpha, beta=0,1', / ' 18=clustered ',
|
|
$ 'alpha, beta=0,1 21=random alpha, beta=0,1',
|
|
$ / ' Large & Small Matrices:', / ' 22=(large, small) ',
|
|
$ '23=(small,large) 24=(small,small) 25=(large,large)',
|
|
$ / ' 26=random O(1) matrices.' )
|
|
*
|
|
9993 FORMAT( / ' Tests performed: (H is Hessenberg, S is Schur, B, ',
|
|
$ 'T, P are triangular,', / 20X, 'U, V, Q, and Z are ', A,
|
|
$ ', l and r are the', / 20X,
|
|
$ 'appropriate left and right eigenvectors, resp., a is',
|
|
$ / 20X, 'alpha, b is beta, and ', A, ' means ', A, '.)',
|
|
$ / ' 1 = | A - U H V', A,
|
|
$ ' | / ( |A| n ulp ) 2 = | B - U T V', A,
|
|
$ ' | / ( |B| n ulp )', / ' 3 = | I - UU', A,
|
|
$ ' | / ( n ulp ) 4 = | I - VV', A,
|
|
$ ' | / ( n ulp )', / ' 5 = | H - Q S Z', A,
|
|
$ ' | / ( |H| n ulp )', 6X, '6 = | T - Q P Z', A,
|
|
$ ' | / ( |T| n ulp )', / ' 7 = | I - QQ', A,
|
|
$ ' | / ( n ulp ) 8 = | I - ZZ', A,
|
|
$ ' | / ( n ulp )', / ' 9 = max | ( b S - a P )', A,
|
|
$ ' l | / const. 10 = max | ( b H - a T )', A,
|
|
$ ' l | / const.', /
|
|
$ ' 11= max | ( b S - a P ) r | / const. 12 = max | ( b H',
|
|
$ ' - a T ) r | / const.', / 1X )
|
|
*
|
|
9992 FORMAT( ' Matrix order=', I5, ', type=', I2, ', seed=',
|
|
$ 4( I4, ',' ), ' result ', I2, ' is', 0P, F8.2 )
|
|
9991 FORMAT( ' Matrix order=', I5, ', type=', I2, ', seed=',
|
|
$ 4( I4, ',' ), ' result ', I2, ' is', 1P, D10.3 )
|
|
*
|
|
* End of DCHKGG
|
|
*
|
|
END
|