--- rpl/lapack/lapack/dlangb.f	2020/05/21 21:45:59	1.18
+++ rpl/lapack/lapack/dlangb.f	2023/08/07 08:38:54	1.19
@@ -116,20 +116,16 @@
 *> \author Univ. of Colorado Denver
 *> \author NAG Ltd.
 *
-*> \date December 2016
-*
 *> \ingroup doubleGBauxiliary
 *
 *  =====================================================================
       DOUBLE PRECISION FUNCTION DLANGB( NORM, N, KL, KU, AB, LDAB,
      $                 WORK )
 *
-*  -- 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..--
-*     December 2016
 *
-      IMPLICIT NONE
 *     .. Scalar Arguments ..
       CHARACTER          NORM
       INTEGER            KL, KU, LDAB, N
@@ -140,24 +136,22 @@
 *
 * =====================================================================
 *
+*
 *     .. Parameters ..
       DOUBLE PRECISION   ONE, ZERO
       PARAMETER          ( ONE = 1.0D+0, ZERO = 0.0D+0 )
 *     ..
 *     .. Local Scalars ..
       INTEGER            I, J, K, L
-      DOUBLE PRECISION   SUM, VALUE, TEMP
+      DOUBLE PRECISION   SCALE, SUM, VALUE, TEMP
 *     ..
-*     .. Local Arrays ..
-      DOUBLE PRECISION   SSQ( 2 ), COLSSQ( 2 )
+*     .. External Subroutines ..
+      EXTERNAL           DLASSQ
 *     ..
 *     .. External Functions ..
       LOGICAL            LSAME, DISNAN
       EXTERNAL           LSAME, DISNAN
 *     ..
-*     .. External Subroutines ..
-      EXTERNAL           DLASSQ, DCOMBSSQ
-*     ..
 *     .. Intrinsic Functions ..
       INTRINSIC          ABS, MAX, MIN, SQRT
 *     ..
@@ -209,22 +203,15 @@
       ELSE IF( ( LSAME( NORM, 'F' ) ) .OR. ( LSAME( NORM, 'E' ) ) ) THEN
 *
 *        Find normF(A).
-*        SSQ(1) is scale
-*        SSQ(2) is sum-of-squares
-*        For better accuracy, sum each column separately.
 *
-         SSQ( 1 ) = ZERO
-         SSQ( 2 ) = ONE
+         SCALE = ZERO
+         SUM = ONE
          DO 90 J = 1, N
             L = MAX( 1, J-KU )
             K = KU + 1 - J + L
-            COLSSQ( 1 ) = ZERO
-            COLSSQ( 2 ) = ONE
-            CALL DLASSQ( MIN( N, J+KL )-L+1, AB( K, J ), 1,
-     $                   COLSSQ( 1 ), COLSSQ( 2 ) )
-            CALL DCOMBSSQ( SSQ, COLSSQ )
+            CALL DLASSQ( MIN( N, J+KL )-L+1, AB( K, J ), 1, SCALE, SUM )
    90    CONTINUE
-         VALUE = SSQ( 1 )*SQRT( SSQ( 2 ) )
+         VALUE = SCALE*SQRT( SUM )
       END IF
 *
       DLANGB = VALUE