--- rpl/lapack/lapack/dlanst.f 2012/08/22 09:48:18 1.10
+++ rpl/lapack/lapack/dlanst.f 2018/05/29 07:17:57 1.17
@@ -1,25 +1,25 @@
-*> \brief \b DLANST
+*> \brief \b DLANST returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a real symmetric tridiagonal matrix.
*
* =========== 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 DLANST + dependencies
-*>
-*> [TGZ]
-*>
-*> [ZIP]
-*>
+*> Download DLANST + dependencies
+*>
+*> [TGZ]
+*>
+*> [ZIP]
+*>
*> [TXT]
-*> \endhtmlonly
+*> \endhtmlonly
*
* Definition:
* ===========
*
* DOUBLE PRECISION FUNCTION DLANST( NORM, N, D, E )
-*
+*
* .. Scalar Arguments ..
* CHARACTER NORM
* INTEGER N
@@ -27,7 +27,7 @@
* .. Array Arguments ..
* DOUBLE PRECISION D( * ), E( * )
* ..
-*
+*
*
*> \par Purpose:
* =============
@@ -88,22 +88,22 @@
* 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 auxOTHERauxiliary
+*> \ingroup OTHERauxiliary
*
* =====================================================================
DOUBLE PRECISION FUNCTION DLANST( NORM, N, D, E )
*
-* -- LAPACK auxiliary routine (version 3.4.0) --
+* -- LAPACK auxiliary 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 NORM
@@ -124,14 +124,14 @@
DOUBLE PRECISION ANORM, SCALE, SUM
* ..
* .. External Functions ..
- LOGICAL LSAME
- EXTERNAL LSAME
+ LOGICAL LSAME, DISNAN
+ EXTERNAL LSAME, DISNAN
* ..
* .. External Subroutines ..
EXTERNAL DLASSQ
* ..
* .. Intrinsic Functions ..
- INTRINSIC ABS, MAX, SQRT
+ INTRINSIC ABS, SQRT
* ..
* .. Executable Statements ..
*
@@ -143,8 +143,10 @@
*
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
@@ -154,11 +156,12 @@
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