--- rpl/lapack/lapack/dlarre.f	2016/08/27 15:34:30	1.18
+++ rpl/lapack/lapack/dlarre.f	2023/08/07 08:38:57	1.24
@@ -2,18 +2,18 @@
 *
 *  =========== DOCUMENTATION ===========
 *
-* Online html documentation available at 
-*            http://www.netlib.org/lapack/explore-html/ 
+* Online html documentation available at
+*            http://www.netlib.org/lapack/explore-html/
 *
 *> \htmlonly
-*> Download DLARRE + dependencies 
-*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlarre.f"> 
-*> [TGZ]</a> 
-*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlarre.f"> 
-*> [ZIP]</a> 
-*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlarre.f"> 
+*> Download DLARRE + dependencies
+*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlarre.f">
+*> [TGZ]</a>
+*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlarre.f">
+*> [ZIP]</a>
+*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlarre.f">
 *> [TXT]</a>
-*> \endhtmlonly 
+*> \endhtmlonly
 *
 *  Definition:
 *  ===========
@@ -22,7 +22,7 @@
 *                           RTOL1, RTOL2, SPLTOL, NSPLIT, ISPLIT, M,
 *                           W, WERR, WGAP, IBLOCK, INDEXW, GERS, PIVMIN,
 *                           WORK, IWORK, INFO )
-* 
+*
 *       .. Scalar Arguments ..
 *       CHARACTER          RANGE
 *       INTEGER            IL, INFO, IU, M, N, NSPLIT
@@ -34,7 +34,7 @@
 *       DOUBLE PRECISION   D( * ), E( * ), E2( * ), GERS( * ),
 *      $                   W( * ),WERR( * ), WGAP( * ), WORK( * )
 *       ..
-*  
+*
 *
 *> \par Purpose:
 *  =============
@@ -150,7 +150,7 @@
 *>          RTOL2 is DOUBLE PRECISION
 *>           Parameters for bisection.
 *>           An interval [LEFT,RIGHT] has converged if
-*>           RIGHT-LEFT.LT.MAX( RTOL1*GAP, RTOL2*MAX(|LEFT|,|RIGHT|) )
+*>           RIGHT-LEFT < MAX( RTOL1*GAP, RTOL2*MAX(|LEFT|,|RIGHT|) )
 *> \endverbatim
 *>
 *> \param[in] SPLTOL
@@ -271,14 +271,12 @@
 *  Authors:
 *  ========
 *
-*> \author Univ. of Tennessee 
-*> \author Univ. of California Berkeley 
-*> \author Univ. of Colorado Denver 
-*> \author NAG Ltd. 
+*> \author Univ. of Tennessee
+*> \author Univ. of California Berkeley
+*> \author Univ. of Colorado Denver
+*> \author NAG Ltd.
 *
-*> \date June 2016
-*
-*> \ingroup auxOTHERauxiliary
+*> \ingroup OTHERauxiliary
 *
 *> \par Further Details:
 *  =====================
@@ -305,10 +303,9 @@
      $                    W, WERR, WGAP, IBLOCK, INDEXW, GERS, PIVMIN,
      $                    WORK, IWORK, INFO )
 *
-*  -- LAPACK auxiliary routine (version 3.6.1) --
+*  -- LAPACK auxiliary routine --
 *  -- 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 ..
       CHARACTER          RANGE
@@ -360,7 +357,7 @@
 *     ..
 *     .. External Subroutines ..
       EXTERNAL           DCOPY, DLARNV, DLARRA, DLARRB, DLARRC, DLARRD,
-     $                   DLASQ2
+     $                   DLASQ2, DLARRK
 *     ..
 *     .. Intrinsic Functions ..
       INTRINSIC          ABS, MAX, MIN
@@ -370,7 +367,12 @@
 *
 
       INFO = 0
-
+*
+*     Quick return if possible
+*
+      IF( N.LE.0 ) THEN
+         RETURN
+      END IF
 *
 *     Decode RANGE
 *
@@ -894,6 +896,6 @@
 
       RETURN
 *
-*     end of DLARRE
+*     End of DLARRE
 *
       END