zdrvgt.f

来自「famous linear algebra library (LAPACK) p」· F 代码 · 共 504 行 · 第 1/2 页

      SUBROUTINE ZDRVGT( DOTYPE, NN, NVAL, NRHS, THRESH, TSTERR, A, AF,
     $                   B, X, XACT, WORK, RWORK, IWORK, NOUT )
*
*  -- LAPACK test routine (version 3.1) --
*     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
*     November 2006
*
*     .. Scalar Arguments ..
      LOGICAL            TSTERR
      INTEGER            NN, NOUT, NRHS
      DOUBLE PRECISION   THRESH
*     ..
*     .. Array Arguments ..
      LOGICAL            DOTYPE( * )
      INTEGER            IWORK( * ), NVAL( * )
      DOUBLE PRECISION   RWORK( * )
      COMPLEX*16         A( * ), AF( * ), B( * ), WORK( * ), X( * ),
     $                   XACT( * )
*     ..
*
*  Purpose
*  =======
*
*  ZDRVGT tests ZGTSV and -SVX.
*
*  Arguments
*  =========
*
*  DOTYPE  (input) LOGICAL array, dimension (NTYPES)
*          The matrix types to be used for testing.  Matrices of type j
*          (for 1 <= j <= NTYPES) are used for testing if DOTYPE(j) =
*          .TRUE.; if DOTYPE(j) = .FALSE., then type j is not used.
*
*  NN      (input) INTEGER
*          The number of values of N contained in the vector NVAL.
*
*  NVAL    (input) INTEGER array, dimension (NN)
*          The values of the matrix dimension N.
*
*  THRESH  (input) DOUBLE PRECISION
*          The threshold value for the test ratios.  A result is
*          included in the output file if RESULT >= THRESH.  To have
*          every test ratio printed, use THRESH = 0.
*
*  TSTERR  (input) LOGICAL
*          Flag that indicates whether error exits are to be tested.
*
*  A       (workspace) COMPLEX*16 array, dimension (NMAX*4)
*
*  AF      (workspace) COMPLEX*16 array, dimension (NMAX*4)
*
*  B       (workspace) COMPLEX*16 array, dimension (NMAX*NRHS)
*
*  X       (workspace) COMPLEX*16 array, dimension (NMAX*NRHS)
*
*  XACT    (workspace) COMPLEX*16 array, dimension (NMAX*NRHS)
*
*  WORK    (workspace) COMPLEX*16 array, dimension
*                      (NMAX*max(3,NRHS))
*
*  RWORK   (workspace) DOUBLE PRECISION array, dimension (NMAX+2*NRHS)
*
*  IWORK   (workspace) INTEGER array, dimension (2*NMAX)
*
*  NOUT    (input) INTEGER
*          The unit number for output.
*
*  =====================================================================
*
*     .. Parameters ..
      DOUBLE PRECISION   ONE, ZERO
      PARAMETER          ( ONE = 1.0D+0, ZERO = 0.0D+0 )
      INTEGER            NTYPES
      PARAMETER          ( NTYPES = 12 )
      INTEGER            NTESTS
      PARAMETER          ( NTESTS = 6 )
*     ..
*     .. Local Scalars ..
      LOGICAL            TRFCON, ZEROT
      CHARACTER          DIST, FACT, TRANS, TYPE
      CHARACTER*3        PATH
      INTEGER            I, IFACT, IMAT, IN, INFO, ITRAN, IX, IZERO, J,
     $                   K, K1, KL, KOFF, KU, LDA, M, MODE, N, NERRS,
     $                   NFAIL, NIMAT, NRUN, NT
      DOUBLE PRECISION   AINVNM, ANORM, ANORMI, ANORMO, COND, RCOND,
     $                   RCONDC, RCONDI, RCONDO
*     ..
*     .. Local Arrays ..
      CHARACTER          TRANSS( 3 )
      INTEGER            ISEED( 4 ), ISEEDY( 4 )
      DOUBLE PRECISION   RESULT( NTESTS ), Z( 3 )
*     ..
*     .. External Functions ..
      DOUBLE PRECISION   DGET06, DZASUM, ZLANGT
      EXTERNAL           DGET06, DZASUM, ZLANGT
*     ..
*     .. External Subroutines ..
      EXTERNAL           ALADHD, ALAERH, ALASVM, ZCOPY, ZDSCAL, ZERRVX,
     $                   ZGET04, ZGTSV, ZGTSVX, ZGTT01, ZGTT02, ZGTT05,
     $                   ZGTTRF, ZGTTRS, ZLACPY, ZLAGTM, ZLARNV, ZLASET,
     $                   ZLATB4, ZLATMS
*     ..
*     .. Intrinsic Functions ..
      INTRINSIC          DCMPLX, MAX
*     ..
*     .. Scalars in Common ..
      LOGICAL            LERR, OK
      CHARACTER*6        SRNAMT
      INTEGER            INFOT, NUNIT
*     ..
*     .. Common blocks ..
      COMMON             / INFOC / INFOT, NUNIT, OK, LERR
      COMMON             / SRNAMC / SRNAMT
*     ..
*     .. Data statements ..
      DATA               ISEEDY / 0, 0, 0, 1 / , TRANSS / 'N', 'T',
     $                   'C' /
*     ..
*     .. Executable Statements ..
*
      PATH( 1: 1 ) = 'Zomplex precision'
      PATH( 2: 3 ) = 'GT'
      NRUN = 0
      NFAIL = 0
      NERRS = 0
      DO 10 I = 1, 4
         ISEED( I ) = ISEEDY( I )
   10 CONTINUE
*
*     Test the error exits
*
      IF( TSTERR )
     $   CALL ZERRVX( PATH, NOUT )
      INFOT = 0
*
      DO 140 IN = 1, NN
*
*        Do for each value of N in NVAL.
*
         N = NVAL( IN )
         M = MAX( N-1, 0 )
         LDA = MAX( 1, N )
         NIMAT = NTYPES
         IF( N.LE.0 )
     $      NIMAT = 1
*
         DO 130 IMAT = 1, NIMAT
*
*           Do the tests only if DOTYPE( IMAT ) is true.
*
            IF( .NOT.DOTYPE( IMAT ) )
     $         GO TO 130
*
*           Set up parameters with ZLATB4.
*
            CALL ZLATB4( PATH, IMAT, N, N, TYPE, KL, KU, ANORM, MODE,
     $                   COND, DIST )
*
            ZEROT = IMAT.GE.8 .AND. IMAT.LE.10
            IF( IMAT.LE.6 ) THEN
*
*              Types 1-6:  generate matrices of known condition number.
*
               KOFF = MAX( 2-KU, 3-MAX( 1, N ) )
               SRNAMT = 'ZLATMS'
               CALL ZLATMS( N, N, DIST, ISEED, TYPE, RWORK, MODE, COND,
     $                      ANORM, KL, KU, 'Z', AF( KOFF ), 3, WORK,
     $                      INFO )
*
*              Check the error code from ZLATMS.
*
               IF( INFO.NE.0 ) THEN
                  CALL ALAERH( PATH, 'ZLATMS', INFO, 0, ' ', N, N, KL,
     $                         KU, -1, IMAT, NFAIL, NERRS, NOUT )
                  GO TO 130
               END IF
               IZERO = 0
*
               IF( N.GT.1 ) THEN
                  CALL ZCOPY( N-1, AF( 4 ), 3, A, 1 )
                  CALL ZCOPY( N-1, AF( 3 ), 3, A( N+M+1 ), 1 )
               END IF
               CALL ZCOPY( N, AF( 2 ), 3, A( M+1 ), 1 )
            ELSE
*
*              Types 7-12:  generate tridiagonal matrices with
*              unknown condition numbers.
*
               IF( .NOT.ZEROT .OR. .NOT.DOTYPE( 7 ) ) THEN
*
*                 Generate a matrix with elements from [-1,1].
*
                  CALL ZLARNV( 2, ISEED, N+2*M, A )
                  IF( ANORM.NE.ONE )
     $               CALL ZDSCAL( N+2*M, ANORM, A, 1 )
               ELSE IF( IZERO.GT.0 ) THEN
*
*                 Reuse the last matrix by copying back the zeroed out
*                 elements.
*
                  IF( IZERO.EQ.1 ) THEN
                     A( N ) = Z( 2 )
                     IF( N.GT.1 )
     $                  A( 1 ) = Z( 3 )
                  ELSE IF( IZERO.EQ.N ) THEN
                     A( 3*N-2 ) = Z( 1 )
                     A( 2*N-1 ) = Z( 2 )
                  ELSE
                     A( 2*N-2+IZERO ) = Z( 1 )
                     A( N-1+IZERO ) = Z( 2 )
                     A( IZERO ) = Z( 3 )
                  END IF
               END IF
*
*              If IMAT > 7, set one column of the matrix to 0.
*
               IF( .NOT.ZEROT ) THEN
                  IZERO = 0
               ELSE IF( IMAT.EQ.8 ) THEN
                  IZERO = 1
                  Z( 2 ) = A( N )
                  A( N ) = ZERO
                  IF( N.GT.1 ) THEN
                     Z( 3 ) = A( 1 )
                     A( 1 ) = ZERO
                  END IF
               ELSE IF( IMAT.EQ.9 ) THEN
                  IZERO = N
                  Z( 1 ) = A( 3*N-2 )
                  Z( 2 ) = A( 2*N-1 )
                  A( 3*N-2 ) = ZERO
                  A( 2*N-1 ) = ZERO
               ELSE
                  IZERO = ( N+1 ) / 2
                  DO 20 I = IZERO, N - 1
                     A( 2*N-2+I ) = ZERO
                     A( N-1+I ) = ZERO
                     A( I ) = ZERO
   20             CONTINUE
                  A( 3*N-2 ) = ZERO
                  A( 2*N-1 ) = ZERO
               END IF
            END IF
*
            DO 120 IFACT = 1, 2
               IF( IFACT.EQ.1 ) THEN
                  FACT = 'F'
               ELSE
                  FACT = 'N'
               END IF
*
*              Compute the condition number for comparison with