--- rpl/lapack/lapack/dhsein.f	2012/12/14 14:22:30	1.11
+++ rpl/lapack/lapack/dhsein.f	2017/06/17 10:53:51	1.15
@@ -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 DHSEIN + dependencies 
-*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dhsein.f"> 
-*> [TGZ]</a> 
-*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dhsein.f"> 
-*> [ZIP]</a> 
-*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dhsein.f"> 
+*> Download DHSEIN + dependencies
+*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dhsein.f">
+*> [TGZ]</a>
+*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dhsein.f">
+*> [ZIP]</a>
+*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dhsein.f">
 *> [TXT]</a>
-*> \endhtmlonly 
+*> \endhtmlonly
 *
 *  Definition:
 *  ===========
@@ -21,7 +21,7 @@
 *       SUBROUTINE DHSEIN( SIDE, EIGSRC, INITV, SELECT, N, H, LDH, WR, WI,
 *                          VL, LDVL, VR, LDVR, MM, M, WORK, IFAILL,
 *                          IFAILR, INFO )
-* 
+*
 *       .. Scalar Arguments ..
 *       CHARACTER          EIGSRC, INITV, SIDE
 *       INTEGER            INFO, LDH, LDVL, LDVR, M, MM, N
@@ -32,7 +32,7 @@
 *       DOUBLE PRECISION   H( LDH, * ), VL( LDVL, * ), VR( LDVR, * ),
 *      $                   WI( * ), WORK( * ), WR( * )
 *       ..
-*  
+*
 *
 *> \par Purpose:
 *  =============
@@ -108,6 +108,7 @@
 *> \verbatim
 *>          H is DOUBLE PRECISION array, dimension (LDH,N)
 *>          The upper Hessenberg matrix H.
+*>          If a NaN is detected in H, the routine will return with INFO=-6.
 *> \endverbatim
 *>
 *> \param[in] LDH
@@ -238,12 +239,12 @@
 *  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 November 2011
+*> \date December 2016
 *
 *> \ingroup doubleOTHERcomputational
 *
@@ -262,10 +263,10 @@
      $                   VL, LDVL, VR, LDVR, MM, M, WORK, IFAILL,
      $                   IFAILR, INFO )
 *
-*  -- LAPACK computational routine (version 3.4.0) --
+*  -- LAPACK computational routine (version 3.7.0) --
 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
-*     November 2011
+*     December 2016
 *
 *     .. Scalar Arguments ..
       CHARACTER          EIGSRC, INITV, SIDE
@@ -291,9 +292,9 @@
      $                   WKR
 *     ..
 *     .. External Functions ..
-      LOGICAL            LSAME
+      LOGICAL            LSAME, DISNAN
       DOUBLE PRECISION   DLAMCH, DLANHS
-      EXTERNAL           LSAME, DLAMCH, DLANHS
+      EXTERNAL           LSAME, DLAMCH, DLANHS, DISNAN
 *     ..
 *     .. External Subroutines ..
       EXTERNAL           DLAEIN, XERBLA
@@ -423,7 +424,10 @@
 *              has not ben computed before.
 *
                HNORM = DLANHS( 'I', KR-KL+1, H( KL, KL ), LDH, WORK )
-               IF( HNORM.GT.ZERO ) THEN
+               IF( DISNAN( HNORM ) ) THEN
+                  INFO = -6
+                  RETURN
+               ELSE IF( HNORM.GT.ZERO ) THEN
                   EPS3 = HNORM*ULP
                ELSE
                   EPS3 = SMLNUM