--- rpl/lapack/lapack/dlarre.f	2017/06/17 11:06:25	1.20
+++ rpl/lapack/lapack/dlarre.f	2023/08/07 08:38:57	1.24
@@ -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
@@ -276,8 +276,6 @@
 *> \author Univ. of Colorado Denver
 *> \author NAG Ltd.
 *
-*> \date June 2016
-*
 *> \ingroup OTHERauxiliary
 *
 *> \par Further Details:
@@ -305,10 +303,9 @@
      $                    W, WERR, WGAP, IBLOCK, INDEXW, GERS, PIVMIN,
      $                    WORK, IWORK, INFO )
 *
-*  -- LAPACK auxiliary routine (version 3.7.0) --
+*  -- 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