--- rpl/lapack/lapack/ztgsja.f 2012/08/22 09:48:41 1.11
+++ rpl/lapack/lapack/ztgsja.f 2023/08/07 08:39:40 1.18
@@ -2,18 +2,18 @@
*
* =========== 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 ZTGSJA + dependencies
-*>
-*> [TGZ]
-*>
-*> [ZIP]
-*>
+*> Download ZTGSJA + dependencies
+*>
+*> [TGZ]
+*>
+*> [ZIP]
+*>
*> [TXT]
-*> \endhtmlonly
+*> \endhtmlonly
*
* Definition:
* ===========
@@ -21,7 +21,7 @@
* SUBROUTINE ZTGSJA( JOBU, JOBV, JOBQ, M, P, N, K, L, A, LDA, B,
* LDB, TOLA, TOLB, ALPHA, BETA, U, LDU, V, LDV,
* Q, LDQ, WORK, NCYCLE, INFO )
-*
+*
* .. Scalar Arguments ..
* CHARACTER JOBQ, JOBU, JOBV
* INTEGER INFO, K, L, LDA, LDB, LDQ, LDU, LDV, M, N,
@@ -33,7 +33,7 @@
* COMPLEX*16 A( LDA, * ), B( LDB, * ), Q( LDQ, * ),
* $ U( LDU, * ), V( LDV, * ), WORK( * )
* ..
-*
+*
*
*> \par Purpose:
* =============
@@ -346,12 +346,10 @@
* 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 complex16OTHERcomputational
*
@@ -379,10 +377,9 @@
$ LDB, TOLA, TOLB, ALPHA, BETA, U, LDU, V, LDV,
$ Q, LDQ, WORK, NCYCLE, INFO )
*
-* -- LAPACK computational routine (version 3.4.0) --
+* -- LAPACK computational 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 ..
CHARACTER JOBQ, JOBU, JOBV
@@ -401,7 +398,7 @@
* .. Parameters ..
INTEGER MAXIT
PARAMETER ( MAXIT = 40 )
- DOUBLE PRECISION ZERO, ONE
+ DOUBLE PRECISION ZERO, ONE, HUGENUM
PARAMETER ( ZERO = 0.0D+0, ONE = 1.0D+0 )
COMPLEX*16 CZERO, CONE
PARAMETER ( CZERO = ( 0.0D+0, 0.0D+0 ),
@@ -424,7 +421,8 @@
$ ZLASET, ZROT
* ..
* .. Intrinsic Functions ..
- INTRINSIC ABS, DBLE, DCONJG, MAX, MIN
+ INTRINSIC ABS, DBLE, DCONJG, MAX, MIN, HUGE
+ PARAMETER ( HUGENUM = HUGE(ZERO) )
* ..
* .. Executable Statements ..
*
@@ -610,9 +608,9 @@
*
A1 = DBLE( A( K+I, N-L+I ) )
B1 = DBLE( B( I, N-L+I ) )
+ GAMMA = B1 / A1
*
- IF( A1.NE.ZERO ) THEN
- GAMMA = B1 / A1
+ IF( (GAMMA.LE.HUGENUM).AND.(GAMMA.GE.-HUGENUM) ) THEN
*
IF( GAMMA.LT.ZERO ) THEN
CALL ZDSCAL( L-I+1, -ONE, B( I, N-L+I ), LDB )