--- rpl/lapack/lapack/dlag2.f	2011/11/21 20:42:55	1.8
+++ rpl/lapack/lapack/dlag2.f	2023/08/07 08:38:54	1.19
@@ -1,26 +1,26 @@
-*> \brief \b DLAG2
+*> \brief \b DLAG2 computes the eigenvalues of a 2-by-2 generalized eigenvalue problem, with scaling as necessary to avoid over-/underflow.
 *
 *  =========== 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 DLAG2 + dependencies 
-*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlag2.f"> 
-*> [TGZ]</a> 
-*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlag2.f"> 
-*> [ZIP]</a> 
-*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlag2.f"> 
+*> Download DLAG2 + dependencies
+*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlag2.f">
+*> [TGZ]</a>
+*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlag2.f">
+*> [ZIP]</a>
+*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlag2.f">
 *> [TXT]</a>
-*> \endhtmlonly 
+*> \endhtmlonly
 *
 *  Definition:
 *  ===========
 *
 *       SUBROUTINE DLAG2( A, LDA, B, LDB, SAFMIN, SCALE1, SCALE2, WR1,
 *                         WR2, WI )
-* 
+*
 *       .. Scalar Arguments ..
 *       INTEGER            LDA, LDB
 *       DOUBLE PRECISION   SAFMIN, SCALE1, SCALE2, WI, WR1, WR2
@@ -28,7 +28,7 @@
 *       .. Array Arguments ..
 *       DOUBLE PRECISION   A( LDA, * ), B( LDB, * )
 *       ..
-*  
+*
 *
 *> \par Purpose:
 *  =============
@@ -99,7 +99,7 @@
 *>          will always be positive.  If the eigenvalues are real, then
 *>          the first (real) eigenvalue is  WR1 / SCALE1 , but this may
 *>          overflow or underflow, and in fact, SCALE1 may be zero or
-*>          less than the underflow threshhold if the exact eigenvalue
+*>          less than the underflow threshold if the exact eigenvalue
 *>          is sufficiently large.
 *> \endverbatim
 *>
@@ -112,7 +112,7 @@
 *>          eigenvalues are real, then the second (real) eigenvalue is
 *>          WR2 / SCALE2 , but this may overflow or underflow, and in
 *>          fact, SCALE2 may be zero or less than the underflow
-*>          threshhold if the exact eigenvalue is sufficiently large.
+*>          threshold if the exact eigenvalue is sufficiently large.
 *> \endverbatim
 *>
 *> \param[out] WR1
@@ -143,12 +143,10 @@
 *  Authors:
 *  ========
 *
-*> \author Univ. of Tennessee 
-*> \author Univ. of California Berkeley 
-*> \author Univ. of Colorado Denver 
-*> \author NAG Ltd. 
-*
-*> \date November 2011
+*> \author Univ. of Tennessee
+*> \author Univ. of California Berkeley
+*> \author Univ. of Colorado Denver
+*> \author NAG Ltd.
 *
 *> \ingroup doubleOTHERauxiliary
 *
@@ -156,10 +154,9 @@
       SUBROUTINE DLAG2( A, LDA, B, LDB, SAFMIN, SCALE1, SCALE2, WR1,
      $                  WR2, WI )
 *
-*  -- LAPACK auxiliary routine (version 3.4.0) --
+*  -- LAPACK auxiliary routine --
 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
-*     November 2011
 *
 *     .. Scalar Arguments ..
       INTEGER            LDA, LDB
@@ -266,8 +263,8 @@
 *     Note: the test of R in the following IF is to cover the case when
 *           DISCR is small and negative and is flushed to zero during
 *           the calculation of R.  On machines which have a consistent
-*           flush-to-zero threshhold and handle numbers above that
-*           threshhold correctly, it would not be necessary.
+*           flush-to-zero threshold and handle numbers above that
+*           threshold correctly, it would not be necessary.
 *
       IF( DISCR.GE.ZERO .OR. R.EQ.ZERO ) THEN
          SUM = PP + SIGN( R, PP )