--- rpl/lapack/lapack/dlaqr1.f 2014/01/27 09:28:21 1.13
+++ rpl/lapack/lapack/dlaqr1.f 2023/08/07 08:38:55 1.20
@@ -2,24 +2,24 @@
*
* =========== 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 DLAQR1 + dependencies
-*>
-*> [TGZ]
-*>
-*> [ZIP]
-*>
+*> Download DLAQR1 + dependencies
+*>
+*> [TGZ]
+*>
+*> [ZIP]
+*>
*> [TXT]
-*> \endhtmlonly
+*> \endhtmlonly
*
* Definition:
* ===========
*
* SUBROUTINE DLAQR1( N, H, LDH, SR1, SI1, SR2, SI2, V )
-*
+*
* .. Scalar Arguments ..
* DOUBLE PRECISION SI1, SI2, SR1, SR2
* INTEGER LDH, N
@@ -27,7 +27,7 @@
* .. Array Arguments ..
* DOUBLE PRECISION H( LDH, * ), V( * )
* ..
-*
+*
*
*> \par Purpose:
* =============
@@ -55,21 +55,21 @@
*
*> \param[in] N
*> \verbatim
-*> N is integer
+*> N is INTEGER
*> Order of the matrix H. N must be either 2 or 3.
*> \endverbatim
*>
*> \param[in] H
*> \verbatim
-*> H is DOUBLE PRECISION array of dimension (LDH,N)
+*> H is DOUBLE PRECISION array, dimension (LDH,N)
*> The 2-by-2 or 3-by-3 matrix H in (*).
*> \endverbatim
*>
*> \param[in] LDH
*> \verbatim
-*> LDH is integer
+*> LDH is INTEGER
*> The leading dimension of H as declared in
-*> the calling procedure. LDH.GE.N
+*> the calling procedure. LDH >= N
*> \endverbatim
*>
*> \param[in] SR1
@@ -95,7 +95,7 @@
*>
*> \param[out] V
*> \verbatim
-*> V is DOUBLE PRECISION array of dimension N
+*> V is DOUBLE PRECISION array, dimension (N)
*> A scalar multiple of the first column of the
*> matrix K in (*).
*> \endverbatim
@@ -103,12 +103,10 @@
* Authors:
* ========
*
-*> \author Univ. of Tennessee
-*> \author Univ. of California Berkeley
-*> \author Univ. of Colorado Denver
-*> \author NAG Ltd.
-*
-*> \date September 2012
+*> \author Univ. of Tennessee
+*> \author Univ. of California Berkeley
+*> \author Univ. of Colorado Denver
+*> \author NAG Ltd.
*
*> \ingroup doubleOTHERauxiliary
*
@@ -121,10 +119,9 @@
* =====================================================================
SUBROUTINE DLAQR1( N, H, LDH, SR1, SI1, SR2, SI2, V )
*
-* -- LAPACK auxiliary routine (version 3.4.2) --
+* -- LAPACK auxiliary routine --
* -- LAPACK is a software package provided by Univ. of Tennessee, --
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
-* September 2012
*
* .. Scalar Arguments ..
DOUBLE PRECISION SI1, SI2, SR1, SR2
@@ -147,6 +144,13 @@
INTRINSIC ABS
* ..
* .. Executable Statements ..
+*
+* Quick return if possible
+*
+ IF( N.NE.2 .AND. N.NE.3 ) THEN
+ RETURN
+ END IF
+*
IF( N.EQ.2 ) THEN
S = ABS( H( 1, 1 )-SR2 ) + ABS( SI2 ) + ABS( H( 2, 1 ) )
IF( S.EQ.ZERO ) THEN