--- rpl/lapack/lapack/zsyswapr.f 2016/08/27 15:35:08 1.9
+++ rpl/lapack/lapack/zsyswapr.f 2023/08/07 08:39:38 1.13
@@ -2,31 +2,31 @@
*
* =========== 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 ZSYSWAPR + dependencies
-*>
-*> [TGZ]
-*>
-*> [ZIP]
-*>
+*> Download ZSYSWAPR + dependencies
+*>
+*> [TGZ]
+*>
+*> [ZIP]
+*>
*> [TXT]
-*> \endhtmlonly
+*> \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:
* =============
@@ -57,16 +57,14 @@
*>
*> \param[in,out] A
*> \verbatim
-*> A is COMPLEX*16 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.
+*> 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
@@ -90,36 +88,32 @@
* 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 complex16SYauxiliary
*
* =====================================================================
SUBROUTINE ZSYSWAPR( UPLO, N, A, LDA, I1, I2)
*
-* -- 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 ..
CHARACTER UPLO
INTEGER I1, I2, LDA, N
* ..
* .. Array Arguments ..
- COMPLEX*16 A( LDA, N )
+ COMPLEX*16 A( LDA, * )
*
* =====================================================================
*
* ..
* .. Local Scalars ..
LOGICAL UPPER
- INTEGER I
COMPLEX*16 TMP
*
* .. External Functions ..
@@ -136,57 +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
+* - 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