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Diff for /rpl/lapack/lapack/dtgex2.f between versions 1.4 and 1.5

version 1.4, 2010/08/06 15:32:36 version 1.5, 2010/08/07 13:18:08
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       SUBROUTINE DTGEX2( WANTQ, WANTZ, N, A, LDA, B, LDB, Q, LDQ, Z,        SUBROUTINE DTGEX2( WANTQ, WANTZ, N, A, LDA, B, LDB, Q, LDQ, Z,
      $                   LDZ, J1, N1, N2, WORK, LWORK, INFO )       $                   LDZ, J1, N1, N2, WORK, LWORK, INFO )
 *  *
 *  -- LAPACK auxiliary routine (version 3.2) --  *  -- LAPACK auxiliary routine (version 3.2.2) --
 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --  *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--  *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
 *     November 2006  *     June 2010
 *  *
 *     .. Scalar Arguments ..  *     .. Scalar Arguments ..
       LOGICAL            WANTQ, WANTZ        LOGICAL            WANTQ, WANTZ
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 *  N       (input) INTEGER  *  N       (input) INTEGER
 *          The order of the matrices A and B. N >= 0.  *          The order of the matrices A and B. N >= 0.
 *  *
 *  A      (input/output) DOUBLE PRECISION arrays, dimensions (LDA,N)  *  A       (input/output) DOUBLE PRECISION array, dimensions (LDA,N)
 *          On entry, the matrix A in the pair (A, B).  *          On entry, the matrix A in the pair (A, B).
 *          On exit, the updated matrix A.  *          On exit, the updated matrix A.
 *  *
 *  LDA     (input)  INTEGER  *  LDA     (input) INTEGER
 *          The leading dimension of the array A. LDA >= max(1,N).  *          The leading dimension of the array A. LDA >= max(1,N).
 *  *
 *  B      (input/output) DOUBLE PRECISION arrays, dimensions (LDB,N)  *  B       (input/output) DOUBLE PRECISION array, dimensions (LDB,N)
 *          On entry, the matrix B in the pair (A, B).  *          On entry, the matrix B in the pair (A, B).
 *          On exit, the updated matrix B.  *          On exit, the updated matrix B.
 *  *
 *  LDB     (input)  INTEGER  *  LDB     (input) INTEGER
 *          The leading dimension of the array B. LDB >= max(1,N).  *          The leading dimension of the array B. LDB >= max(1,N).
 *  *
 *  Q       (input/output) DOUBLE PRECISION array, dimension (LDZ,N)  *  Q       (input/output) DOUBLE PRECISION array, dimension (LDQ,N)
 *          On entry, if WANTQ = .TRUE., the orthogonal matrix Q.  *          On entry, if WANTQ = .TRUE., the orthogonal matrix Q.
 *          On exit, the updated matrix Q.  *          On exit, the updated matrix Q.
 *          Not referenced if WANTQ = .FALSE..  *          Not referenced if WANTQ = .FALSE..
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 *     .. Parameters ..  *     .. Parameters ..
       DOUBLE PRECISION   ZERO, ONE        DOUBLE PRECISION   ZERO, ONE
       PARAMETER          ( ZERO = 0.0D+0, ONE = 1.0D+0 )        PARAMETER          ( ZERO = 0.0D+0, ONE = 1.0D+0 )
       DOUBLE PRECISION   TEN        DOUBLE PRECISION   TWENTY
       PARAMETER          ( TEN = 1.0D+01 )        PARAMETER          ( TWENTY = 2.0D+01 )
       INTEGER            LDST        INTEGER            LDST
       PARAMETER          ( LDST = 4 )        PARAMETER          ( LDST = 4 )
       LOGICAL            WANDS        LOGICAL            WANDS
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       CALL DLACPY( 'Full', M, M, T, LDST, WORK, M )        CALL DLACPY( 'Full', M, M, T, LDST, WORK, M )
       CALL DLASSQ( M*M, WORK, 1, DSCALE, DSUM )        CALL DLASSQ( M*M, WORK, 1, DSCALE, DSUM )
       DNORM = DSCALE*SQRT( DSUM )        DNORM = DSCALE*SQRT( DSUM )
       THRESH = MAX( TEN*EPS*DNORM, SMLNUM )  *
   *     THRES has been changed from 
   *        THRESH = MAX( TEN*EPS*SA, SMLNUM )
   *     to
   *        THRESH = MAX( TWENTY*EPS*SA, SMLNUM )
   *     on 04/01/10.
   *     "Bug" reported by Ondra Kamenik, confirmed by Julie Langou, fixed by
   *     Jim Demmel and Guillaume Revy. See forum post 1783.
   *
         THRESH = MAX( TWENTY*EPS*DNORM, SMLNUM )
 *  *
       IF( M.EQ.2 ) THEN        IF( M.EQ.2 ) THEN
 *  *
Removed from v.1.4  
changed lines
  Added in v.1.5

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