--- rpl/lapack/lapack/zsyswapr.f 2010/12/21 13:53:56 1.2
+++ rpl/lapack/lapack/zsyswapr.f 2023/08/07 08:39:38 1.13
@@ -1,59 +1,120 @@
- SUBROUTINE ZSYSWAPR( UPLO, N, A, I1, I2)
+*> \brief \b ZSYSWAPR
*
-* -- LAPACK auxiliary routine (version 3.3.0) --
+* =========== DOCUMENTATION ===========
+*
+* Online html documentation available at
+* http://www.netlib.org/lapack/explore-html/
+*
+*> \htmlonly
+*> Download ZSYSWAPR + dependencies
+*>
+*> [TGZ]
+*>
+*> [ZIP]
+*>
+*> [TXT]
+*> \endhtmlonly
+*
+* Definition:
+* ===========
+*
+* SUBROUTINE ZSYSWAPR( UPLO, N, A, LDA, I1, I2)
+*
+* .. Scalar Arguments ..
+* CHARACTER UPLO
+* INTEGER I1, I2, LDA, N
+* ..
+* .. Array Arguments ..
+* COMPLEX*16 A( LDA, N )
+*
+*
+*> \par Purpose:
+* =============
+*>
+*> \verbatim
+*>
+*> ZSYSWAPR applies an elementary permutation on the rows and the columns of
+*> a symmetric matrix.
+*> \endverbatim
+*
+* Arguments:
+* ==========
+*
+*> \param[in] UPLO
+*> \verbatim
+*> UPLO is CHARACTER*1
+*> Specifies whether the details of the factorization are stored
+*> as an upper or lower triangular matrix.
+*> = 'U': Upper triangular, form is A = U*D*U**T;
+*> = 'L': Lower triangular, form is A = L*D*L**T.
+*> \endverbatim
+*>
+*> \param[in] N
+*> \verbatim
+*> N is INTEGER
+*> The order of the matrix A. N >= 0.
+*> \endverbatim
+*>
+*> \param[in,out] A
+*> \verbatim
+*> A is COMPLEX*16 array, dimension (LDA,*)
+*> On entry, the N-by-N matrix A. On exit, the permuted matrix
+*> where the rows I1 and I2 and columns I1 and I2 are interchanged.
+*> If UPLO = 'U', the interchanges are applied to the upper
+*> triangular part and the strictly lower triangular part of A is
+*> not referenced; if UPLO = 'L', the interchanges are applied to
+*> the lower triangular part and the part of A above the diagonal
+*> is not referenced.
+*> \endverbatim
+*>
+*> \param[in] LDA
+*> \verbatim
+*> LDA is INTEGER
+*> The leading dimension of the array A. LDA >= max(1,N).
+*> \endverbatim
+*>
+*> \param[in] I1
+*> \verbatim
+*> I1 is INTEGER
+*> Index of the first row to swap
+*> \endverbatim
+*>
+*> \param[in] I2
+*> \verbatim
+*> I2 is INTEGER
+*> Index of the second row to swap
+*> \endverbatim
+*
+* Authors:
+* ========
+*
+*> \author Univ. of Tennessee
+*> \author Univ. of California Berkeley
+*> \author Univ. of Colorado Denver
+*> \author NAG Ltd.
+*
+*> \ingroup complex16SYauxiliary
+*
+* =====================================================================
+ SUBROUTINE ZSYSWAPR( UPLO, N, A, LDA, I1, I2)
+*
+* -- 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 2010
*
* .. Scalar Arguments ..
CHARACTER UPLO
- INTEGER I1, I2, N
+ INTEGER I1, I2, LDA, N
* ..
* .. Array Arguments ..
- DOUBLE COMPLEX A(N,N)
-*
-* Purpose
-* =======
-*
-* ZSYSWAPR applies an elementary permutation on the rows and the columns of
-* a symmetric matrix.
-*
-* Arguments
-* =========
-*
-* UPLO (input) CHARACTER*1
-* Specifies whether the details of the factorization are stored
-* as an upper or lower triangular matrix.
-* = 'U': Upper triangular, form is A = U*D*U**T;
-* = 'L': Lower triangular, form is A = L*D*L**T.
-*
-* N (input) INTEGER
-* The order of the matrix A. N >= 0.
-*
-* A (input/output) DOUBLE COMPLEX array, dimension (LDA,N)
-* On entry, the NB diagonal matrix D and the multipliers
-* used to obtain the factor U or L as computed by ZSYTRF.
-*
-* On exit, if INFO = 0, the (symmetric) inverse of the original
-* matrix. If UPLO = 'U', the upper triangular part of the
-* inverse is formed and the part of A below the diagonal is not
-* referenced; if UPLO = 'L' the lower triangular part of the
-* inverse is formed and the part of A above the diagonal is
-* not referenced.
-*
-* I1 (input) INTEGER
-* Index of the first row to swap
-*
-* I2 (input) INTEGER
-* Index of the second row to swap
+ COMPLEX*16 A( LDA, * )
*
* =====================================================================
*
* ..
* .. Local Scalars ..
LOGICAL UPPER
- INTEGER I
- DOUBLE COMPLEX TMP
+ COMPLEX*16 TMP
*
* .. External Functions ..
LOGICAL LSAME
@@ -69,57 +130,43 @@
*
* UPPER
* first swap
-* - swap column I1 and I2 from I1 to I1-1
+* - swap column I1 and I2 from I1 to I1-1
CALL ZSWAP( I1-1, A(1,I1), 1, A(1,I2), 1 )
*
* second swap :
* - swap A(I1,I1) and A(I2,I2)
-* - swap row I1 from I1+1 to I2-1 with col I2 from I1+1 to I2-1
+* - swap row I1 from I1+1 to I2-1 with col I2 from I1+1 to I2-1
TMP=A(I1,I1)
A(I1,I1)=A(I2,I2)
A(I2,I2)=TMP
*
- DO I=1,I2-I1-1
- TMP=A(I1,I1+I)
- A(I1,I1+I)=A(I1+I,I2)
- A(I1+I,I2)=TMP
- END DO
+ CALL ZSWAP( I2-I1-1, A(I1,I1+1), LDA, A(I1+1,I2), 1 )
*
* third swap
* - swap row I1 and I2 from I2+1 to N
- DO I=I2+1,N
- TMP=A(I1,I)
- A(I1,I)=A(I2,I)
- A(I2,I)=TMP
- END DO
+ IF ( I2.LT.N )
+ $ CALL ZSWAP( N-I2, A(I1,I2+1), LDA, A(I2,I2+1), LDA )
*
ELSE
*
* LOWER
* first swap
-* - swap row I1 and I2 from I1 to I1-1
- CALL ZSWAP( I1-1, A(I1,1), N, A(I2,1), N )
+* - swap row I1 and I2 from I1 to I1-1
+ CALL ZSWAP( I1-1, A(I1,1), LDA, A(I2,1), LDA )
*
* second swap :
* - swap A(I1,I1) and A(I2,I2)
-* - swap col I1 from I1+1 to I2-1 with row I2 from I1+1 to I2-1
+* - swap col I1 from I1+1 to I2-1 with row I2 from I1+1 to I2-1
TMP=A(I1,I1)
A(I1,I1)=A(I2,I2)
A(I2,I2)=TMP
*
- DO I=1,I2-I1-1
- TMP=A(I1+I,I1)
- A(I1+I,I1)=A(I2,I1+I)
- A(I2,I1+I)=TMP
- END DO
+ CALL ZSWAP( I2-I1-1, A(I1+1,I1), 1, A(I2,I1+1), LDA )
*
* third swap
* - swap col I1 and I2 from I2+1 to N
- DO I=I2+1,N
- TMP=A(I,I1)
- A(I,I1)=A(I,I2)
- A(I,I2)=TMP
- END DO
+ IF ( I2.LT.N )
+ $ CALL ZSWAP( N-I2, A(I2+1,I1), 1, A(I2+1,I2), 1 )
*
ENDIF
END SUBROUTINE ZSYSWAPR