Increase deflation tolerance to match ?LASD7 (Reference-LAPACK PR 1286)
This commit is contained in:
Martin Kroeker
@@ -5,7 +5,6 @@
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* Online html documentation available at
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* http://www.netlib.org/lapack/explore-html/
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*
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*> \htmlonly
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*> Download DLASD2 + dependencies
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlasd2.f">
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*> [TGZ]</a>
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@@ -13,7 +12,6 @@
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*> [ZIP]</a>
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlasd2.f">
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*> [TXT]</a>
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*> \endhtmlonly
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*
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* Definition:
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* ===========
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@@ -254,7 +252,7 @@
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*> \author Univ. of Colorado Denver
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*> \author NAG Ltd.
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*
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*> \ingroup OTHERauxiliary
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*> \ingroup lasd2
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*
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*> \par Contributors:
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* ==================
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@@ -263,9 +261,11 @@
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*> California at Berkeley, USA
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*>
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* =====================================================================
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SUBROUTINE DLASD2( NL, NR, SQRE, K, D, Z, ALPHA, BETA, U, LDU, VT,
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SUBROUTINE DLASD2( NL, NR, SQRE, K, D, Z, ALPHA, BETA, U, LDU,
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$ VT,
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$ LDVT, DSIGMA, U2, LDU2, VT2, LDVT2, IDXP, IDX,
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$ IDXC, IDXQ, COLTYP, INFO )
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IMPLICIT NONE
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*
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* -- LAPACK auxiliary routine --
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* -- LAPACK is a software package provided by Univ. of Tennessee, --
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@@ -303,7 +303,8 @@
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EXTERNAL DLAMCH, DLAPY2
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* ..
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* .. External Subroutines ..
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EXTERNAL DCOPY, DLACPY, DLAMRG, DLASET, DROT, XERBLA
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EXTERNAL DCOPY, DLACPY, DLAMRG, DLASET, DROT,
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$ XERBLA
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* ..
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* .. Intrinsic Functions ..
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INTRINSIC ABS, MAX
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@@ -396,7 +397,7 @@
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*
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EPS = DLAMCH( 'Epsilon' )
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TOL = MAX( ABS( ALPHA ), ABS( BETA ) )
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TOL = EIGHT*EPS*MAX( ABS( D( N ) ), TOL )
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TOL = EIGHT*EIGHT*EPS*MAX( ABS( D( N ) ), TOL )
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*
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* There are 2 kinds of deflation -- first a value in the z-vector
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* is small, second two (or more) singular values are very close
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@@ -479,7 +480,8 @@
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IDXJ = IDXJ - 1
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END IF
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CALL DROT( N, U( 1, IDXJP ), 1, U( 1, IDXJ ), 1, C, S )
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CALL DROT( M, VT( IDXJP, 1 ), LDVT, VT( IDXJ, 1 ), LDVT, C,
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CALL DROT( M, VT( IDXJP, 1 ), LDVT, VT( IDXJ, 1 ), LDVT,
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$ C,
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$ S )
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IF( COLTYP( J ).NE.COLTYP( JPREV ) ) THEN
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COLTYP( J ) = 3
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@@ -621,7 +623,8 @@
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CALL DCOPY( N-K, DSIGMA( K+1 ), 1, D( K+1 ), 1 )
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CALL DLACPY( 'A', N, N-K, U2( 1, K+1 ), LDU2, U( 1, K+1 ),
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$ LDU )
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CALL DLACPY( 'A', N-K, M, VT2( K+1, 1 ), LDVT2, VT( K+1, 1 ),
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CALL DLACPY( 'A', N-K, M, VT2( K+1, 1 ), LDVT2, VT( K+1,
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$ 1 ),
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$ LDVT )
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END IF
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*
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@@ -5,7 +5,6 @@
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* Online html documentation available at
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* http://www.netlib.org/lapack/explore-html/
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*
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*> \htmlonly
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*> Download SLASD2 + dependencies
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/slasd2.f">
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*> [TGZ]</a>
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@@ -13,7 +12,6 @@
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*> [ZIP]</a>
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/slasd2.f">
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*> [TXT]</a>
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*> \endhtmlonly
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*
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* Definition:
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* ===========
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@@ -254,7 +252,7 @@
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*> \author Univ. of Colorado Denver
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*> \author NAG Ltd.
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*
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*> \ingroup OTHERauxiliary
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*> \ingroup lasd2
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*
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*> \par Contributors:
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* ==================
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@@ -263,9 +261,11 @@
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*> California at Berkeley, USA
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*>
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* =====================================================================
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SUBROUTINE SLASD2( NL, NR, SQRE, K, D, Z, ALPHA, BETA, U, LDU, VT,
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SUBROUTINE SLASD2( NL, NR, SQRE, K, D, Z, ALPHA, BETA, U, LDU,
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$ VT,
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$ LDVT, DSIGMA, U2, LDU2, VT2, LDVT2, IDXP, IDX,
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$ IDXC, IDXQ, COLTYP, INFO )
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IMPLICIT NONE
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*
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* -- LAPACK auxiliary routine --
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* -- LAPACK is a software package provided by Univ. of Tennessee, --
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@@ -303,7 +303,8 @@
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EXTERNAL SLAMCH, SLAPY2
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* ..
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* .. External Subroutines ..
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EXTERNAL SCOPY, SLACPY, SLAMRG, SLASET, SROT, XERBLA
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EXTERNAL SCOPY, SLACPY, SLAMRG, SLASET, SROT,
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$ XERBLA
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* ..
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* .. Intrinsic Functions ..
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INTRINSIC ABS, MAX
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@@ -396,7 +397,7 @@
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*
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EPS = SLAMCH( 'Epsilon' )
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TOL = MAX( ABS( ALPHA ), ABS( BETA ) )
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TOL = EIGHT*EPS*MAX( ABS( D( N ) ), TOL )
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TOL = EIGHT*EIGHT*EPS*MAX( ABS( D( N ) ), TOL )
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*
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* There are 2 kinds of deflation -- first a value in the z-vector
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* is small, second two (or more) singular values are very close
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@@ -479,7 +480,8 @@
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IDXJ = IDXJ - 1
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END IF
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CALL SROT( N, U( 1, IDXJP ), 1, U( 1, IDXJ ), 1, C, S )
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CALL SROT( M, VT( IDXJP, 1 ), LDVT, VT( IDXJ, 1 ), LDVT, C,
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CALL SROT( M, VT( IDXJP, 1 ), LDVT, VT( IDXJ, 1 ), LDVT,
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$ C,
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$ S )
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IF( COLTYP( J ).NE.COLTYP( JPREV ) ) THEN
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COLTYP( J ) = 3
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@@ -621,7 +623,8 @@
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CALL SCOPY( N-K, DSIGMA( K+1 ), 1, D( K+1 ), 1 )
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CALL SLACPY( 'A', N, N-K, U2( 1, K+1 ), LDU2, U( 1, K+1 ),
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$ LDU )
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CALL SLACPY( 'A', N-K, M, VT2( K+1, 1 ), LDVT2, VT( K+1, 1 ),
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CALL SLACPY( 'A', N-K, M, VT2( K+1, 1 ), LDVT2, VT( K+1,
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$ 1 ),
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$ LDVT )
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END IF
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*
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