--- rpl/lapack/lapack/zgetc2.f 2011/11/21 22:19:46 1.9
+++ rpl/lapack/lapack/zgetc2.f 2018/05/29 06:55:22 1.19
@@ -1,25 +1,25 @@
-*> \brief \b ZGETC2
+*> \brief \b ZGETC2 computes the LU factorization with complete pivoting of the general n-by-n 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 ZGETC2 + dependencies
-*>
-*> [TGZ]
-*>
-*> [ZIP]
-*>
+*> Download ZGETC2 + dependencies
+*>
+*> [TGZ]
+*>
+*> [ZIP]
+*>
*> [TXT]
-*> \endhtmlonly
+*> \endhtmlonly
*
* Definition:
* ===========
*
* SUBROUTINE ZGETC2( N, A, LDA, IPIV, JPIV, INFO )
-*
+*
* .. Scalar Arguments ..
* INTEGER INFO, LDA, N
* ..
@@ -27,7 +27,7 @@
* INTEGER IPIV( * ), JPIV( * )
* COMPLEX*16 A( LDA, * )
* ..
-*
+*
*
*> \par Purpose:
* =============
@@ -93,12 +93,12 @@
* 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 June 2016
*
*> \ingroup complex16GEauxiliary
*
@@ -111,10 +111,10 @@
* =====================================================================
SUBROUTINE ZGETC2( N, A, LDA, IPIV, JPIV, INFO )
*
-* -- LAPACK auxiliary routine (version 3.4.0) --
+* -- LAPACK auxiliary routine (version 3.8.0) --
* -- LAPACK is a software package provided by Univ. of Tennessee, --
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
-* November 2011
+* June 2016
*
* .. Scalar Arguments ..
INTEGER INFO, LDA, N
@@ -135,7 +135,7 @@
DOUBLE PRECISION BIGNUM, EPS, SMIN, SMLNUM, XMAX
* ..
* .. External Subroutines ..
- EXTERNAL ZGERU, ZSWAP
+ EXTERNAL ZGERU, ZSWAP, DLABAD
* ..
* .. External Functions ..
DOUBLE PRECISION DLAMCH
@@ -146,14 +146,32 @@
* ..
* .. Executable Statements ..
*
+ INFO = 0
+*
+* Quick return if possible
+*
+ IF( N.EQ.0 )
+ $ RETURN
+*
* Set constants to control overflow
*
- INFO = 0
EPS = DLAMCH( 'P' )
SMLNUM = DLAMCH( 'S' ) / EPS
BIGNUM = ONE / SMLNUM
CALL DLABAD( SMLNUM, BIGNUM )
*
+* Handle the case N=1 by itself
+*
+ IF( N.EQ.1 ) THEN
+ IPIV( 1 ) = 1
+ JPIV( 1 ) = 1
+ IF( ABS( A( 1, 1 ) ).LT.SMLNUM ) THEN
+ INFO = 1
+ A( 1, 1 ) = DCMPLX( SMLNUM, ZERO )
+ END IF
+ RETURN
+ END IF
+*
* Factorize A using complete pivoting.
* Set pivots less than SMIN to SMIN
*
@@ -203,6 +221,12 @@
INFO = N
A( N, N ) = DCMPLX( SMIN, ZERO )
END IF
+*
+* Set last pivots to N
+*
+ IPIV( N ) = N
+ JPIV( N ) = N
+*
RETURN
*
* End of ZGETC2