--- rpl/lapack/lapack/dormql.f 2010/08/13 21:03:54 1.6
+++ rpl/lapack/lapack/dormql.f 2017/06/17 10:53:59 1.17
@@ -1,10 +1,176 @@
+*> \brief \b DORMQL
+*
+* =========== DOCUMENTATION ===========
+*
+* Online html documentation available at
+* http://www.netlib.org/lapack/explore-html/
+*
+*> \htmlonly
+*> Download DORMQL + dependencies
+*>
+*> [TGZ]
+*>
+*> [ZIP]
+*>
+*> [TXT]
+*> \endhtmlonly
+*
+* Definition:
+* ===========
+*
+* SUBROUTINE DORMQL( SIDE, TRANS, M, N, K, A, LDA, TAU, C, LDC,
+* WORK, LWORK, INFO )
+*
+* .. Scalar Arguments ..
+* CHARACTER SIDE, TRANS
+* INTEGER INFO, K, LDA, LDC, LWORK, M, N
+* ..
+* .. Array Arguments ..
+* DOUBLE PRECISION A( LDA, * ), C( LDC, * ), TAU( * ), WORK( * )
+* ..
+*
+*
+*> \par Purpose:
+* =============
+*>
+*> \verbatim
+*>
+*> DORMQL overwrites the general real M-by-N matrix C with
+*>
+*> SIDE = 'L' SIDE = 'R'
+*> TRANS = 'N': Q * C C * Q
+*> TRANS = 'T': Q**T * C C * Q**T
+*>
+*> where Q is a real orthogonal matrix defined as the product of k
+*> elementary reflectors
+*>
+*> Q = H(k) . . . H(2) H(1)
+*>
+*> as returned by DGEQLF. Q is of order M if SIDE = 'L' and of order N
+*> if SIDE = 'R'.
+*> \endverbatim
+*
+* Arguments:
+* ==========
+*
+*> \param[in] SIDE
+*> \verbatim
+*> SIDE is CHARACTER*1
+*> = 'L': apply Q or Q**T from the Left;
+*> = 'R': apply Q or Q**T from the Right.
+*> \endverbatim
+*>
+*> \param[in] TRANS
+*> \verbatim
+*> TRANS is CHARACTER*1
+*> = 'N': No transpose, apply Q;
+*> = 'T': Transpose, apply Q**T.
+*> \endverbatim
+*>
+*> \param[in] M
+*> \verbatim
+*> M is INTEGER
+*> The number of rows of the matrix C. M >= 0.
+*> \endverbatim
+*>
+*> \param[in] N
+*> \verbatim
+*> N is INTEGER
+*> The number of columns of the matrix C. N >= 0.
+*> \endverbatim
+*>
+*> \param[in] K
+*> \verbatim
+*> K is INTEGER
+*> The number of elementary reflectors whose product defines
+*> the matrix Q.
+*> If SIDE = 'L', M >= K >= 0;
+*> if SIDE = 'R', N >= K >= 0.
+*> \endverbatim
+*>
+*> \param[in] A
+*> \verbatim
+*> A is DOUBLE PRECISION array, dimension (LDA,K)
+*> The i-th column must contain the vector which defines the
+*> elementary reflector H(i), for i = 1,2,...,k, as returned by
+*> DGEQLF in the last k columns of its array argument A.
+*> \endverbatim
+*>
+*> \param[in] LDA
+*> \verbatim
+*> LDA is INTEGER
+*> The leading dimension of the array A.
+*> If SIDE = 'L', LDA >= max(1,M);
+*> if SIDE = 'R', LDA >= max(1,N).
+*> \endverbatim
+*>
+*> \param[in] TAU
+*> \verbatim
+*> TAU is DOUBLE PRECISION array, dimension (K)
+*> TAU(i) must contain the scalar factor of the elementary
+*> reflector H(i), as returned by DGEQLF.
+*> \endverbatim
+*>
+*> \param[in,out] C
+*> \verbatim
+*> C is DOUBLE PRECISION array, dimension (LDC,N)
+*> On entry, the M-by-N matrix C.
+*> On exit, C is overwritten by Q*C or Q**T*C or C*Q**T or C*Q.
+*> \endverbatim
+*>
+*> \param[in] LDC
+*> \verbatim
+*> LDC is INTEGER
+*> The leading dimension of the array C. LDC >= max(1,M).
+*> \endverbatim
+*>
+*> \param[out] WORK
+*> \verbatim
+*> WORK is DOUBLE PRECISION array, dimension (MAX(1,LWORK))
+*> On exit, if INFO = 0, WORK(1) returns the optimal LWORK.
+*> \endverbatim
+*>
+*> \param[in] LWORK
+*> \verbatim
+*> LWORK is INTEGER
+*> The dimension of the array WORK.
+*> If SIDE = 'L', LWORK >= max(1,N);
+*> if SIDE = 'R', LWORK >= max(1,M).
+*> For good performance, LWORK should generally be larger.
+*>
+*> If LWORK = -1, then a workspace query is assumed; the routine
+*> only calculates the optimal size of the WORK array, returns
+*> this value as the first entry of the WORK array, and no error
+*> message related to LWORK is issued by XERBLA.
+*> \endverbatim
+*>
+*> \param[out] INFO
+*> \verbatim
+*> INFO is INTEGER
+*> = 0: successful exit
+*> < 0: if INFO = -i, the i-th argument had an illegal value
+*> \endverbatim
+*
+* Authors:
+* ========
+*
+*> \author Univ. of Tennessee
+*> \author Univ. of California Berkeley
+*> \author Univ. of Colorado Denver
+*> \author NAG Ltd.
+*
+*> \date December 2016
+*
+*> \ingroup doubleOTHERcomputational
+*
+* =====================================================================
SUBROUTINE DORMQL( SIDE, TRANS, M, N, K, A, LDA, TAU, C, LDC,
$ WORK, LWORK, INFO )
*
-* -- LAPACK routine (version 3.2) --
+* -- LAPACK computational routine (version 3.7.0) --
* -- LAPACK is a software package provided by Univ. of Tennessee, --
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
-* November 2006
+* December 2016
*
* .. Scalar Arguments ..
CHARACTER SIDE, TRANS
@@ -14,102 +180,18 @@
DOUBLE PRECISION A( LDA, * ), C( LDC, * ), TAU( * ), WORK( * )
* ..
*
-* Purpose
-* =======
-*
-* DORMQL overwrites the general real M-by-N matrix C with
-*
-* SIDE = 'L' SIDE = 'R'
-* TRANS = 'N': Q * C C * Q
-* TRANS = 'T': Q**T * C C * Q**T
-*
-* where Q is a real orthogonal matrix defined as the product of k
-* elementary reflectors
-*
-* Q = H(k) . . . H(2) H(1)
-*
-* as returned by DGEQLF. Q is of order M if SIDE = 'L' and of order N
-* if SIDE = 'R'.
-*
-* Arguments
-* =========
-*
-* SIDE (input) CHARACTER*1
-* = 'L': apply Q or Q**T from the Left;
-* = 'R': apply Q or Q**T from the Right.
-*
-* TRANS (input) CHARACTER*1
-* = 'N': No transpose, apply Q;
-* = 'T': Transpose, apply Q**T.
-*
-* M (input) INTEGER
-* The number of rows of the matrix C. M >= 0.
-*
-* N (input) INTEGER
-* The number of columns of the matrix C. N >= 0.
-*
-* K (input) INTEGER
-* The number of elementary reflectors whose product defines
-* the matrix Q.
-* If SIDE = 'L', M >= K >= 0;
-* if SIDE = 'R', N >= K >= 0.
-*
-* A (input) DOUBLE PRECISION array, dimension (LDA,K)
-* The i-th column must contain the vector which defines the
-* elementary reflector H(i), for i = 1,2,...,k, as returned by
-* DGEQLF in the last k columns of its array argument A.
-* A is modified by the routine but restored on exit.
-*
-* LDA (input) INTEGER
-* The leading dimension of the array A.
-* If SIDE = 'L', LDA >= max(1,M);
-* if SIDE = 'R', LDA >= max(1,N).
-*
-* TAU (input) DOUBLE PRECISION array, dimension (K)
-* TAU(i) must contain the scalar factor of the elementary
-* reflector H(i), as returned by DGEQLF.
-*
-* C (input/output) DOUBLE PRECISION array, dimension (LDC,N)
-* On entry, the M-by-N matrix C.
-* On exit, C is overwritten by Q*C or Q**T*C or C*Q**T or C*Q.
-*
-* LDC (input) INTEGER
-* The leading dimension of the array C. LDC >= max(1,M).
-*
-* WORK (workspace/output) DOUBLE PRECISION array, dimension (MAX(1,LWORK))
-* On exit, if INFO = 0, WORK(1) returns the optimal LWORK.
-*
-* LWORK (input) INTEGER
-* The dimension of the array WORK.
-* If SIDE = 'L', LWORK >= max(1,N);
-* if SIDE = 'R', LWORK >= max(1,M).
-* For optimum performance LWORK >= N*NB if SIDE = 'L', and
-* LWORK >= M*NB if SIDE = 'R', where NB is the optimal
-* blocksize.
-*
-* If LWORK = -1, then a workspace query is assumed; the routine
-* only calculates the optimal size of the WORK array, returns
-* this value as the first entry of the WORK array, and no error
-* message related to LWORK is issued by XERBLA.
-*
-* INFO (output) INTEGER
-* = 0: successful exit
-* < 0: if INFO = -i, the i-th argument had an illegal value
-*
* =====================================================================
*
* .. Parameters ..
- INTEGER NBMAX, LDT
- PARAMETER ( NBMAX = 64, LDT = NBMAX+1 )
+ INTEGER NBMAX, LDT, TSIZE
+ PARAMETER ( NBMAX = 64, LDT = NBMAX+1,
+ $ TSIZE = LDT*NBMAX )
* ..
* .. Local Scalars ..
LOGICAL LEFT, LQUERY, NOTRAN
- INTEGER I, I1, I2, I3, IB, IINFO, IWS, LDWORK, LWKOPT,
+ INTEGER I, I1, I2, I3, IB, IINFO, IWT, LDWORK, LWKOPT,
$ MI, NB, NBMIN, NI, NQ, NW
* ..
-* .. Local Arrays ..
- DOUBLE PRECISION T( LDT, NBMAX )
-* ..
* .. External Functions ..
LOGICAL LSAME
INTEGER ILAENV
@@ -153,25 +235,22 @@
INFO = -7
ELSE IF( LDC.LT.MAX( 1, M ) ) THEN
INFO = -10
+ ELSE IF( LWORK.LT.NW .AND. .NOT.LQUERY ) THEN
+ INFO = -12
END IF
*
IF( INFO.EQ.0 ) THEN
+*
+* Compute the workspace requirements
+*
IF( M.EQ.0 .OR. N.EQ.0 ) THEN
LWKOPT = 1
ELSE
-*
-* Determine the block size. NB may be at most NBMAX, where
-* NBMAX is used to define the local array T.
-*
NB = MIN( NBMAX, ILAENV( 1, 'DORMQL', SIDE // TRANS, M, N,
$ K, -1 ) )
- LWKOPT = NW*NB
+ LWKOPT = NW*NB + TSIZE
END IF
WORK( 1 ) = LWKOPT
-*
- IF( LWORK.LT.NW .AND. .NOT.LQUERY ) THEN
- INFO = -12
- END IF
END IF
*
IF( INFO.NE.0 ) THEN
@@ -190,14 +269,11 @@
NBMIN = 2
LDWORK = NW
IF( NB.GT.1 .AND. NB.LT.K ) THEN
- IWS = NW*NB
- IF( LWORK.LT.IWS ) THEN
- NB = LWORK / LDWORK
+ IF( LWORK.LT.NW*NB+TSIZE ) THEN
+ NB = (LWORK-TSIZE) / LDWORK
NBMIN = MAX( 2, ILAENV( 2, 'DORMQL', SIDE // TRANS, M, N, K,
$ -1 ) )
END IF
- ELSE
- IWS = NW
END IF
*
IF( NB.LT.NBMIN .OR. NB.GE.K ) THEN
@@ -210,6 +286,7 @@
*
* Use blocked code
*
+ IWT = 1 + NW*NB
IF( ( LEFT .AND. NOTRAN ) .OR.
$ ( .NOT.LEFT .AND. .NOT.NOTRAN ) ) THEN
I1 = 1
@@ -234,24 +311,24 @@
* H = H(i+ib-1) . . . H(i+1) H(i)
*
CALL DLARFT( 'Backward', 'Columnwise', NQ-K+I+IB-1, IB,
- $ A( 1, I ), LDA, TAU( I ), T, LDT )
+ $ A( 1, I ), LDA, TAU( I ), WORK( IWT ), LDT )
IF( LEFT ) THEN
*
-* H or H' is applied to C(1:m-k+i+ib-1,1:n)
+* H or H**T is applied to C(1:m-k+i+ib-1,1:n)
*
MI = M - K + I + IB - 1
ELSE
*
-* H or H' is applied to C(1:m,1:n-k+i+ib-1)
+* H or H**T is applied to C(1:m,1:n-k+i+ib-1)
*
NI = N - K + I + IB - 1
END IF
*
-* Apply H or H'
+* Apply H or H**T
*
CALL DLARFB( SIDE, TRANS, 'Backward', 'Columnwise', MI, NI,
- $ IB, A( 1, I ), LDA, T, LDT, C, LDC, WORK,
- $ LDWORK )
+ $ IB, A( 1, I ), LDA, WORK( IWT ), LDT, C, LDC,
+ $ WORK, LDWORK )
10 CONTINUE
END IF
WORK( 1 ) = LWKOPT