--- rpl/lapack/lapack/zlanht.f	2012/08/22 09:48:36	1.10
+++ rpl/lapack/lapack/zlanht.f	2012/12/14 12:30:31	1.11
@@ -1,4 +1,4 @@
-*> \brief \b ZLANHT
+*> \brief \b ZLANHT returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a complex Hermitian tridiagonal matrix.
 *
 *  =========== DOCUMENTATION ===========
 *
@@ -94,17 +94,17 @@
 *> \author Univ. of Colorado Denver 
 *> \author NAG Ltd. 
 *
-*> \date November 2011
+*> \date September 2012
 *
 *> \ingroup complex16OTHERauxiliary
 *
 *  =====================================================================
       DOUBLE PRECISION FUNCTION ZLANHT( NORM, N, D, E )
 *
-*  -- LAPACK auxiliary routine (version 3.4.0) --
+*  -- LAPACK auxiliary routine (version 3.4.2) --
 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
-*     November 2011
+*     September 2012
 *
 *     .. Scalar Arguments ..
       CHARACTER          NORM
@@ -126,8 +126,8 @@
       DOUBLE PRECISION   ANORM, SCALE, SUM
 *     ..
 *     .. External Functions ..
-      LOGICAL            LSAME
-      EXTERNAL           LSAME
+      LOGICAL            LSAME, DISNAN
+      EXTERNAL           LSAME, DISNAN
 *     ..
 *     .. External Subroutines ..
       EXTERNAL           DLASSQ, ZLASSQ
@@ -145,8 +145,10 @@
 *
          ANORM = ABS( D( N ) )
          DO 10 I = 1, N - 1
-            ANORM = MAX( ANORM, ABS( D( I ) ) )
-            ANORM = MAX( ANORM, ABS( E( I ) ) )
+            SUM =  ABS( D( I ) )
+            IF( ANORM .LT. SUM .OR. DISNAN( SUM ) ) ANORM = SUM
+            SUM = ABS( E( I ) )
+            IF( ANORM .LT. SUM .OR. DISNAN( SUM ) ) ANORM = SUM
    10    CONTINUE
       ELSE IF( LSAME( NORM, 'O' ) .OR. NORM.EQ.'1' .OR.
      $         LSAME( NORM, 'I' ) ) THEN
@@ -156,11 +158,12 @@
          IF( N.EQ.1 ) THEN
             ANORM = ABS( D( 1 ) )
          ELSE
-            ANORM = MAX( ABS( D( 1 ) )+ABS( E( 1 ) ),
-     $              ABS( E( N-1 ) )+ABS( D( N ) ) )
+            ANORM = ABS( D( 1 ) )+ABS( E( 1 ) )
+            SUM = ABS( E( N-1 ) )+ABS( D( N ) )
+            IF( ANORM .LT. SUM .OR. DISNAN( SUM ) ) ANORM = SUM
             DO 20 I = 2, N - 1
-               ANORM = MAX( ANORM, ABS( D( I ) )+ABS( E( I ) )+
-     $                 ABS( E( I-1 ) ) )
+               SUM = ABS( D( I ) )+ABS( E( I ) )+ABS( E( I-1 ) )
+               IF( ANORM .LT. SUM .OR. DISNAN( SUM ) ) ANORM = SUM
    20       CONTINUE
          END IF
       ELSE IF( ( LSAME( NORM, 'F' ) ) .OR. ( LSAME( NORM, 'E' ) ) ) THEN