diff options
Diffstat (limited to 'SRC/zlamtsqr.f')
| -rw-r--r-- | SRC/zlamtsqr.f | 52 |
1 files changed, 26 insertions, 26 deletions
diff --git a/SRC/zlamtsqr.f b/SRC/zlamtsqr.f index 21513027..7195f9e1 100644 --- a/SRC/zlamtsqr.f +++ b/SRC/zlamtsqr.f @@ -1,8 +1,8 @@ -* +* * Definition: * =========== * -* SUBROUTINE ZLAMTSQR( SIDE, TRANS, M, N, K, MB, NB, A, LDA, T, +* SUBROUTINE ZLAMTSQR( SIDE, TRANS, M, N, K, MB, NB, A, LDA, T, * $ LDT, C, LDC, WORK, LWORK, INFO ) * * @@ -17,15 +17,15 @@ * ============= *> *> \verbatim -*> +*> *> ZLAMTSQR overwrites the general complex M-by-N matrix C with *> -*> +*> *> SIDE = 'L' SIDE = 'R' *> TRANS = 'N': Q * C C * Q *> TRANS = 'C': Q**C * C C * Q**C -*> where Q is a real orthogonal matrix defined as the product -*> of blocked elementary reflectors computed by tall skinny +*> where Q is a real orthogonal matrix defined as the product +*> of blocked elementary reflectors computed by tall skinny *> QR factorization (ZLATSQR) *> \endverbatim * @@ -59,29 +59,29 @@ *> The number of elementary reflectors whose product defines *> the matrix Q. *> N >= K >= 0; -*> +*> *> \endverbatim *> *> \param[in] MB *> \verbatim *> MB is INTEGER -*> The block size to be used in the blocked QR. +*> The block size to be used in the blocked QR. *> MB > N. (must be the same as DLATSQR) *> \endverbatim *> *> \param[in] NB *> \verbatim *> NB is INTEGER -*> The column block size to be used in the blocked QR. +*> The column block size to be used in the blocked QR. *> N >= NB >= 1. *> \endverbatim *> *> \param[in,out] A *> \verbatim *> A is COMPLEX*16 array, dimension (LDA,K) -*> The i-th column must contain the vector which defines the -*> blockedelementary reflector H(i), for i = 1,2,...,k, as -*> returned by DLATSQR in the first k columns of +*> The i-th column must contain the vector which defines the +*> blockedelementary reflector H(i), for i = 1,2,...,k, as +*> returned by DLATSQR in the first k columns of *> its array argument A. *> \endverbatim *> @@ -95,7 +95,7 @@ *> *> \param[in] T *> \verbatim -*> T is COMPLEX*16 array, dimension +*> T is COMPLEX*16 array, dimension *> ( N * Number of blocks(CEIL(M-K/MB-K)), *> The blocked upper triangular block reflectors stored in compact form *> as a sequence of upper triangular blocks. See below @@ -119,13 +119,13 @@ *> \param[out] WORK *> \verbatim *> (workspace) COMPLEX*16 array, dimension (MAX(1,LWORK)) -*> +*> *> \endverbatim *> \param[in] LWORK *> \verbatim *> LWORK is INTEGER *> The dimension of the array WORK. -*> +*> *> If SIDE = 'L', LWORK >= max(1,N)*NB; *> if SIDE = 'R', LWORK >= max(1,MB)*NB. *> If LWORK = -1, then a workspace query is assumed; the routine @@ -172,7 +172,7 @@ *> block reflectors, stored in array T(1:LDT,(i-1)*N+1:i*N). *> The last Q(k) may use fewer rows. *> For more information see Further Details in TPQRT. -*> +*> *> For more details of the overall algorithm, see the description of *> Sequential TSQR in Section 2.2 of [1]. *> @@ -182,7 +182,7 @@ *> \endverbatim *> * ===================================================================== - SUBROUTINE ZLAMTSQR( SIDE, TRANS, M, N, K, MB, NB, A, LDA, T, + SUBROUTINE ZLAMTSQR( SIDE, TRANS, M, N, K, MB, NB, A, LDA, T, $ LDT, C, LDC, WORK, LWORK, INFO ) * * -- LAPACK computational routine (version 3.5.0) -- @@ -210,7 +210,7 @@ LOGICAL LSAME EXTERNAL LSAME * .. External Subroutines .. - EXTERNAL ZGEMQRT, ZTPMQRT, XERBLA + EXTERNAL ZGEMQRT, ZTPMQRT, XERBLA * .. * .. Executable Statements .. * @@ -249,11 +249,11 @@ END IF * * Determine the block size if it is tall skinny or short and wide -* +* IF( INFO.EQ.0) THEN WORK(1) = LW END IF -* +* IF( INFO.NE.0 ) THEN CALL XERBLA( 'ZLAMTSQR', -INFO ) RETURN @@ -268,10 +268,10 @@ END IF * IF((MB.LE.K).OR.(MB.GE.MAX(M,N,K))) THEN - CALL ZGEMQRT( SIDE, TRANS, M, N, K, NB, A, LDA, - $ T, LDT, C, LDC, WORK, INFO) + CALL ZGEMQRT( SIDE, TRANS, M, N, K, NB, A, LDA, + $ T, LDT, C, LDC, WORK, INFO) RETURN - END IF + END IF * IF(LEFT.AND.NOTRAN) THEN * @@ -327,7 +327,7 @@ IF(II.LE.M) THEN * * Multiply Q to the last block of C -* +* CALL ZTPMQRT('L','C',KK , N, K, 0,NB, A(II,1), LDA, $ T(1, CTR * K + 1), LDT, C(1,1), LDC, $ C(II,1), LDC, WORK, INFO ) @@ -397,9 +397,9 @@ * END IF * - WORK(1) = LW + WORK(1) = LW RETURN * * End of ZLAMTSQR * - END
\ No newline at end of file + END |