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Diff for /rpl/lapack/lapack/dlaed4.f between versions 1.18 and 1.19

version 1.18, 2020/05/21 21:45:58 version 1.19, 2023/08/07 08:38:53
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 *> \brief \b DLAED4 used by sstedc. Finds a single root of the secular equation.  *> \brief \b DLAED4 used by DSTEDC. Finds a single root of the secular equation.
 *  *
 *  =========== DOCUMENTATION ===========  *  =========== DOCUMENTATION ===========
 *  *
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 *> \author Univ. of Colorado Denver  *> \author Univ. of Colorado Denver
 *> \author NAG Ltd.  *> \author NAG Ltd.
 *  *
 *> \date December 2016  
 *  
 *> \ingroup auxOTHERcomputational  *> \ingroup auxOTHERcomputational
 *  *
 *> \par Contributors:  *> \par Contributors:
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 *  =====================================================================  *  =====================================================================
       SUBROUTINE DLAED4( N, I, D, Z, DELTA, RHO, DLAM, INFO )        SUBROUTINE DLAED4( N, I, D, Z, DELTA, RHO, DLAM, INFO )
 *  *
 *  -- LAPACK computational routine (version 3.7.0) --  *  -- LAPACK computational routine --
 *  -- 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..--
 *     December 2016  
 *  *
 *     .. Scalar Arguments ..  *     .. Scalar Arguments ..
       INTEGER            I, INFO, N        INTEGER            I, INFO, N
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          IF( C.LT.ZERO )           IF( C.LT.ZERO )
      $      C = ABS( C )       $      C = ABS( C )
          IF( C.EQ.ZERO ) THEN           IF( C.EQ.ZERO ) THEN
 *          ETA = B/A  *           ETA = B/A
 *           ETA = RHO - TAU  *           ETA = RHO - TAU
             ETA = DLTUB - TAU  *           ETA = DLTUB - TAU
   *
   *           Update proposed by Li, Ren-Cang:
               ETA = -W / ( DPSI+DPHI )
          ELSE IF( A.GE.ZERO ) THEN           ELSE IF( A.GE.ZERO ) THEN
             ETA = ( A+SQRT( ABS( A*A-FOUR*B*C ) ) ) / ( TWO*C )              ETA = ( A+SQRT( ABS( A*A-FOUR*B*C ) ) ) / ( TWO*C )
          ELSE           ELSE
Removed from v.1.18  
changed lines
  Added in v.1.19

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