--- rpl/lapack/lapack/zlangt.f	2012/08/22 09:48:35	1.10
+++ rpl/lapack/lapack/zlangt.f	2012/12/14 12:30:31	1.11
@@ -1,4 +1,4 @@
-*> \brief \b ZLANGT
+*> \brief \b ZLANGT returns the value of the 1-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a general tridiagonal matrix.
 *
 *  =========== DOCUMENTATION ===========
 *
@@ -99,17 +99,17 @@
 *> \author Univ. of Colorado Denver 
 *> \author NAG Ltd. 
 *
-*> \date November 2011
+*> \date September 2012
 *
 *> \ingroup complex16OTHERauxiliary
 *
 *  =====================================================================
       DOUBLE PRECISION FUNCTION ZLANGT( NORM, N, DL, D, DU )
 *
-*  -- 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
@@ -127,17 +127,17 @@
 *     ..
 *     .. Local Scalars ..
       INTEGER            I
-      DOUBLE PRECISION   ANORM, SCALE, SUM
+      DOUBLE PRECISION   ANORM, SCALE, SUM, TEMP
 *     ..
 *     .. External Functions ..
-      LOGICAL            LSAME
-      EXTERNAL           LSAME
+      LOGICAL            LSAME, DISNAN
+      EXTERNAL           LSAME, DISNAN
 *     ..
 *     .. External Subroutines ..
       EXTERNAL           ZLASSQ
 *     ..
 *     .. Intrinsic Functions ..
-      INTRINSIC          ABS, MAX, SQRT
+      INTRINSIC          ABS, SQRT
 *     ..
 *     .. Executable Statements ..
 *
@@ -149,9 +149,12 @@
 *
          ANORM = ABS( D( N ) )
          DO 10 I = 1, N - 1
-            ANORM = MAX( ANORM, ABS( DL( I ) ) )
-            ANORM = MAX( ANORM, ABS( D( I ) ) )
-            ANORM = MAX( ANORM, ABS( DU( I ) ) )
+            IF( ANORM.LT.ABS( DL( I ) ) .OR. DISNAN( ABS( DL( I ) ) ) ) 
+     $           ANORM = ABS(DL(I))
+            IF( ANORM.LT.ABS( D( I ) ) .OR. DISNAN( ABS( D( I ) ) ) ) 
+     $           ANORM = ABS(D(I))
+            IF( ANORM.LT.ABS( DU( I ) ) .OR. DISNAN (ABS( DU( I ) ) ) ) 
+     $           ANORM = ABS(DU(I))
    10    CONTINUE
       ELSE IF( LSAME( NORM, 'O' ) .OR. NORM.EQ.'1' ) THEN
 *
@@ -160,11 +163,12 @@
          IF( N.EQ.1 ) THEN
             ANORM = ABS( D( 1 ) )
          ELSE
-            ANORM = MAX( ABS( D( 1 ) )+ABS( DL( 1 ) ),
-     $              ABS( D( N ) )+ABS( DU( N-1 ) ) )
+            ANORM = ABS( D( 1 ) )+ABS( DL( 1 ) )
+            TEMP = ABS( D( N ) )+ABS( DU( N-1 ) ) 
+            IF( ANORM .LT. TEMP .OR. DISNAN( TEMP ) ) ANORM = TEMP
             DO 20 I = 2, N - 1
-               ANORM = MAX( ANORM, ABS( D( I ) )+ABS( DL( I ) )+
-     $                 ABS( DU( I-1 ) ) )
+               TEMP = ABS( D( I ) )+ABS( DL( I ) )+ABS( DU( I-1 ) )
+               IF( ANORM .LT. TEMP .OR. DISNAN( TEMP ) ) ANORM = TEMP
    20       CONTINUE
          END IF
       ELSE IF( LSAME( NORM, 'I' ) ) THEN
@@ -174,11 +178,12 @@
          IF( N.EQ.1 ) THEN
             ANORM = ABS( D( 1 ) )
          ELSE
-            ANORM = MAX( ABS( D( 1 ) )+ABS( DU( 1 ) ),
-     $              ABS( D( N ) )+ABS( DL( N-1 ) ) )
+            ANORM = ABS( D( 1 ) )+ABS( DU( 1 ) )
+            TEMP = ABS( D( N ) )+ABS( DL( N-1 ) )
+            IF( ANORM .LT. TEMP .OR. DISNAN( TEMP ) ) ANORM = TEMP
             DO 30 I = 2, N - 1
-               ANORM = MAX( ANORM, ABS( D( I ) )+ABS( DU( I ) )+
-     $                 ABS( DL( I-1 ) ) )
+               TEMP = ABS( D( I ) )+ABS( DU( I ) )+ABS( DL( I-1 ) )
+               IF( ANORM .LT. TEMP .OR. DISNAN( TEMP ) ) ANORM = TEMP
    30       CONTINUE
          END IF
       ELSE IF( ( LSAME( NORM, 'F' ) ) .OR. ( LSAME( NORM, 'E' ) ) ) THEN