version 1.11, 2012/08/22 09:48:37
|
version 1.12, 2012/12/14 12:30:33
|
Line 1
|
Line 1
|
*> \brief \b ZLARFB |
*> \brief \b ZLARFB applies a block reflector or its conjugate-transpose to a general rectangular matrix. |
* |
* |
* =========== DOCUMENTATION =========== |
* =========== DOCUMENTATION =========== |
* |
* |
Line 159
|
Line 159
|
*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
* |
*> \date November 2011 |
*> \date September 2012 |
* |
* |
*> \ingroup complex16OTHERauxiliary |
*> \ingroup complex16OTHERauxiliary |
* |
* |
Line 195
|
Line 195
|
SUBROUTINE ZLARFB( SIDE, TRANS, DIRECT, STOREV, M, N, K, V, LDV, |
SUBROUTINE ZLARFB( SIDE, TRANS, DIRECT, STOREV, M, N, K, V, LDV, |
$ T, LDT, C, LDC, WORK, LDWORK ) |
$ T, LDT, C, LDC, WORK, LDWORK ) |
* |
* |
* -- LAPACK auxiliary routine (version 3.4.0) -- |
* -- LAPACK auxiliary routine (version 3.4.2) -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- LAPACK is a software package provided by Univ. of Tennessee, -- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- |
* November 2011 |
* September 2012 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
CHARACTER DIRECT, SIDE, STOREV, TRANS |
CHARACTER DIRECT, SIDE, STOREV, TRANS |
Line 382
|
Line 382
|
* Form H * C or H**H * C where C = ( C1 ) |
* Form H * C or H**H * C where C = ( C1 ) |
* ( C2 ) |
* ( C2 ) |
* |
* |
LASTV = MAX( K, ILAZLR( M, K, V, LDV ) ) |
LASTC = ILAZLC( M, N, C, LDC ) |
LASTC = ILAZLC( LASTV, N, C, LDC ) |
|
* |
* |
* W := C**H * V = (C1**H * V1 + C2**H * V2) (stored in WORK) |
* W := C**H * V = (C1**H * V1 + C2**H * V2) (stored in WORK) |
* |
* |
* W := C2**H |
* W := C2**H |
* |
* |
DO 70 J = 1, K |
DO 70 J = 1, K |
CALL ZCOPY( LASTC, C( LASTV-K+J, 1 ), LDC, |
CALL ZCOPY( LASTC, C( M-K+J, 1 ), LDC, |
$ WORK( 1, J ), 1 ) |
$ WORK( 1, J ), 1 ) |
CALL ZLACGV( LASTC, WORK( 1, J ), 1 ) |
CALL ZLACGV( LASTC, WORK( 1, J ), 1 ) |
70 CONTINUE |
70 CONTINUE |
Line 398
|
Line 397
|
* W := W * V2 |
* W := W * V2 |
* |
* |
CALL ZTRMM( 'Right', 'Upper', 'No transpose', 'Unit', |
CALL ZTRMM( 'Right', 'Upper', 'No transpose', 'Unit', |
$ LASTC, K, ONE, V( LASTV-K+1, 1 ), LDV, |
$ LASTC, K, ONE, V( M-K+1, 1 ), LDV, |
$ WORK, LDWORK ) |
$ WORK, LDWORK ) |
IF( LASTV.GT.K ) THEN |
IF( M.GT.K ) THEN |
* |
* |
* W := W + C1**H*V1 |
* W := W + C1**H*V1 |
* |
* |
CALL ZGEMM( 'Conjugate transpose', 'No transpose', |
CALL ZGEMM( 'Conjugate transpose', 'No transpose', |
$ LASTC, K, LASTV-K, |
$ LASTC, K, M-K, |
$ ONE, C, LDC, V, LDV, |
$ ONE, C, LDC, V, LDV, |
$ ONE, WORK, LDWORK ) |
$ ONE, WORK, LDWORK ) |
END IF |
END IF |
Line 417
|
Line 416
|
* |
* |
* C := C - V * W**H |
* C := C - V * W**H |
* |
* |
IF( LASTV.GT.K ) THEN |
IF( M.GT.K ) THEN |
* |
* |
* C1 := C1 - V1 * W**H |
* C1 := C1 - V1 * W**H |
* |
* |
CALL ZGEMM( 'No transpose', 'Conjugate transpose', |
CALL ZGEMM( 'No transpose', 'Conjugate transpose', |
$ LASTV-K, LASTC, K, |
$ M-K, LASTC, K, |
$ -ONE, V, LDV, WORK, LDWORK, |
$ -ONE, V, LDV, WORK, LDWORK, |
$ ONE, C, LDC ) |
$ ONE, C, LDC ) |
END IF |
END IF |
Line 430
|
Line 429
|
* W := W * V2**H |
* W := W * V2**H |
* |
* |
CALL ZTRMM( 'Right', 'Upper', 'Conjugate transpose', |
CALL ZTRMM( 'Right', 'Upper', 'Conjugate transpose', |
$ 'Unit', LASTC, K, ONE, V( LASTV-K+1, 1 ), LDV, |
$ 'Unit', LASTC, K, ONE, V( M-K+1, 1 ), LDV, |
$ WORK, LDWORK ) |
$ WORK, LDWORK ) |
* |
* |
* C2 := C2 - W**H |
* C2 := C2 - W**H |
* |
* |
DO 90 J = 1, K |
DO 90 J = 1, K |
DO 80 I = 1, LASTC |
DO 80 I = 1, LASTC |
C( LASTV-K+J, I ) = C( LASTV-K+J, I ) - |
C( M-K+J, I ) = C( M-K+J, I ) - |
$ DCONJG( WORK( I, J ) ) |
$ DCONJG( WORK( I, J ) ) |
80 CONTINUE |
80 CONTINUE |
90 CONTINUE |
90 CONTINUE |
Line 446
|
Line 445
|
* |
* |
* Form C * H or C * H**H where C = ( C1 C2 ) |
* Form C * H or C * H**H where C = ( C1 C2 ) |
* |
* |
LASTV = MAX( K, ILAZLR( N, K, V, LDV ) ) |
LASTC = ILAZLR( M, N, C, LDC ) |
LASTC = ILAZLR( M, LASTV, C, LDC ) |
|
* |
* |
* W := C * V = (C1*V1 + C2*V2) (stored in WORK) |
* W := C * V = (C1*V1 + C2*V2) (stored in WORK) |
* |
* |
* W := C2 |
* W := C2 |
* |
* |
DO 100 J = 1, K |
DO 100 J = 1, K |
CALL ZCOPY( LASTC, C( 1, LASTV-K+J ), 1, |
CALL ZCOPY( LASTC, C( 1, N-K+J ), 1, |
$ WORK( 1, J ), 1 ) |
$ WORK( 1, J ), 1 ) |
100 CONTINUE |
100 CONTINUE |
* |
* |
* W := W * V2 |
* W := W * V2 |
* |
* |
CALL ZTRMM( 'Right', 'Upper', 'No transpose', 'Unit', |
CALL ZTRMM( 'Right', 'Upper', 'No transpose', 'Unit', |
$ LASTC, K, ONE, V( LASTV-K+1, 1 ), LDV, |
$ LASTC, K, ONE, V( N-K+1, 1 ), LDV, |
$ WORK, LDWORK ) |
$ WORK, LDWORK ) |
IF( LASTV.GT.K ) THEN |
IF( N.GT.K ) THEN |
* |
* |
* W := W + C1 * V1 |
* W := W + C1 * V1 |
* |
* |
CALL ZGEMM( 'No transpose', 'No transpose', |
CALL ZGEMM( 'No transpose', 'No transpose', |
$ LASTC, K, LASTV-K, |
$ LASTC, K, N-K, |
$ ONE, C, LDC, V, LDV, ONE, WORK, LDWORK ) |
$ ONE, C, LDC, V, LDV, ONE, WORK, LDWORK ) |
END IF |
END IF |
* |
* |
Line 479
|
Line 477
|
* |
* |
* C := C - W * V**H |
* C := C - W * V**H |
* |
* |
IF( LASTV.GT.K ) THEN |
IF( N.GT.K ) THEN |
* |
* |
* C1 := C1 - W * V1**H |
* C1 := C1 - W * V1**H |
* |
* |
CALL ZGEMM( 'No transpose', 'Conjugate transpose', |
CALL ZGEMM( 'No transpose', 'Conjugate transpose', |
$ LASTC, LASTV-K, K, -ONE, WORK, LDWORK, V, LDV, |
$ LASTC, N-K, K, -ONE, WORK, LDWORK, V, LDV, |
$ ONE, C, LDC ) |
$ ONE, C, LDC ) |
END IF |
END IF |
* |
* |
* W := W * V2**H |
* W := W * V2**H |
* |
* |
CALL ZTRMM( 'Right', 'Upper', 'Conjugate transpose', |
CALL ZTRMM( 'Right', 'Upper', 'Conjugate transpose', |
$ 'Unit', LASTC, K, ONE, V( LASTV-K+1, 1 ), LDV, |
$ 'Unit', LASTC, K, ONE, V( N-K+1, 1 ), LDV, |
$ WORK, LDWORK ) |
$ WORK, LDWORK ) |
* |
* |
* C2 := C2 - W |
* C2 := C2 - W |
* |
* |
DO 120 J = 1, K |
DO 120 J = 1, K |
DO 110 I = 1, LASTC |
DO 110 I = 1, LASTC |
C( I, LASTV-K+J ) = C( I, LASTV-K+J ) |
C( I, N-K+J ) = C( I, N-K+J ) |
$ - WORK( I, J ) |
$ - WORK( I, J ) |
110 CONTINUE |
110 CONTINUE |
120 CONTINUE |
120 CONTINUE |
Line 643
|
Line 641
|
* Form H * C or H**H * C where C = ( C1 ) |
* Form H * C or H**H * C where C = ( C1 ) |
* ( C2 ) |
* ( C2 ) |
* |
* |
LASTV = MAX( K, ILAZLC( K, M, V, LDV ) ) |
LASTC = ILAZLC( M, N, C, LDC ) |
LASTC = ILAZLC( LASTV, N, C, LDC ) |
|
* |
* |
* W := C**H * V**H = (C1**H * V1**H + C2**H * V2**H) (stored in WORK) |
* W := C**H * V**H = (C1**H * V1**H + C2**H * V2**H) (stored in WORK) |
* |
* |
* W := C2**H |
* W := C2**H |
* |
* |
DO 190 J = 1, K |
DO 190 J = 1, K |
CALL ZCOPY( LASTC, C( LASTV-K+J, 1 ), LDC, |
CALL ZCOPY( LASTC, C( M-K+J, 1 ), LDC, |
$ WORK( 1, J ), 1 ) |
$ WORK( 1, J ), 1 ) |
CALL ZLACGV( LASTC, WORK( 1, J ), 1 ) |
CALL ZLACGV( LASTC, WORK( 1, J ), 1 ) |
190 CONTINUE |
190 CONTINUE |
Line 659
|
Line 656
|
* W := W * V2**H |
* W := W * V2**H |
* |
* |
CALL ZTRMM( 'Right', 'Lower', 'Conjugate transpose', |
CALL ZTRMM( 'Right', 'Lower', 'Conjugate transpose', |
$ 'Unit', LASTC, K, ONE, V( 1, LASTV-K+1 ), LDV, |
$ 'Unit', LASTC, K, ONE, V( 1, M-K+1 ), LDV, |
$ WORK, LDWORK ) |
$ WORK, LDWORK ) |
IF( LASTV.GT.K ) THEN |
IF( M.GT.K ) THEN |
* |
* |
* W := W + C1**H * V1**H |
* W := W + C1**H * V1**H |
* |
* |
CALL ZGEMM( 'Conjugate transpose', |
CALL ZGEMM( 'Conjugate transpose', |
$ 'Conjugate transpose', LASTC, K, LASTV-K, |
$ 'Conjugate transpose', LASTC, K, M-K, |
$ ONE, C, LDC, V, LDV, ONE, WORK, LDWORK ) |
$ ONE, C, LDC, V, LDV, ONE, WORK, LDWORK ) |
END IF |
END IF |
* |
* |
Line 677
|
Line 674
|
* |
* |
* C := C - V**H * W**H |
* C := C - V**H * W**H |
* |
* |
IF( LASTV.GT.K ) THEN |
IF( M.GT.K ) THEN |
* |
* |
* C1 := C1 - V1**H * W**H |
* C1 := C1 - V1**H * W**H |
* |
* |
CALL ZGEMM( 'Conjugate transpose', |
CALL ZGEMM( 'Conjugate transpose', |
$ 'Conjugate transpose', LASTV-K, LASTC, K, |
$ 'Conjugate transpose', M-K, LASTC, K, |
$ -ONE, V, LDV, WORK, LDWORK, ONE, C, LDC ) |
$ -ONE, V, LDV, WORK, LDWORK, ONE, C, LDC ) |
END IF |
END IF |
* |
* |
* W := W * V2 |
* W := W * V2 |
* |
* |
CALL ZTRMM( 'Right', 'Lower', 'No transpose', 'Unit', |
CALL ZTRMM( 'Right', 'Lower', 'No transpose', 'Unit', |
$ LASTC, K, ONE, V( 1, LASTV-K+1 ), LDV, |
$ LASTC, K, ONE, V( 1, M-K+1 ), LDV, |
$ WORK, LDWORK ) |
$ WORK, LDWORK ) |
* |
* |
* C2 := C2 - W**H |
* C2 := C2 - W**H |
* |
* |
DO 210 J = 1, K |
DO 210 J = 1, K |
DO 200 I = 1, LASTC |
DO 200 I = 1, LASTC |
C( LASTV-K+J, I ) = C( LASTV-K+J, I ) - |
C( M-K+J, I ) = C( M-K+J, I ) - |
$ DCONJG( WORK( I, J ) ) |
$ DCONJG( WORK( I, J ) ) |
200 CONTINUE |
200 CONTINUE |
210 CONTINUE |
210 CONTINUE |
Line 705
|
Line 702
|
* |
* |
* Form C * H or C * H**H where C = ( C1 C2 ) |
* Form C * H or C * H**H where C = ( C1 C2 ) |
* |
* |
LASTV = MAX( K, ILAZLC( K, N, V, LDV ) ) |
LASTC = ILAZLR( M, N, C, LDC ) |
LASTC = ILAZLR( M, LASTV, C, LDC ) |
|
* |
* |
* W := C * V**H = (C1*V1**H + C2*V2**H) (stored in WORK) |
* W := C * V**H = (C1*V1**H + C2*V2**H) (stored in WORK) |
* |
* |
* W := C2 |
* W := C2 |
* |
* |
DO 220 J = 1, K |
DO 220 J = 1, K |
CALL ZCOPY( LASTC, C( 1, LASTV-K+J ), 1, |
CALL ZCOPY( LASTC, C( 1, N-K+J ), 1, |
$ WORK( 1, J ), 1 ) |
$ WORK( 1, J ), 1 ) |
220 CONTINUE |
220 CONTINUE |
* |
* |
* W := W * V2**H |
* W := W * V2**H |
* |
* |
CALL ZTRMM( 'Right', 'Lower', 'Conjugate transpose', |
CALL ZTRMM( 'Right', 'Lower', 'Conjugate transpose', |
$ 'Unit', LASTC, K, ONE, V( 1, LASTV-K+1 ), LDV, |
$ 'Unit', LASTC, K, ONE, V( 1, N-K+1 ), LDV, |
$ WORK, LDWORK ) |
$ WORK, LDWORK ) |
IF( LASTV.GT.K ) THEN |
IF( N.GT.K ) THEN |
* |
* |
* W := W + C1 * V1**H |
* W := W + C1 * V1**H |
* |
* |
CALL ZGEMM( 'No transpose', 'Conjugate transpose', |
CALL ZGEMM( 'No transpose', 'Conjugate transpose', |
$ LASTC, K, LASTV-K, ONE, C, LDC, V, LDV, ONE, |
$ LASTC, K, N-K, ONE, C, LDC, V, LDV, ONE, |
$ WORK, LDWORK ) |
$ WORK, LDWORK ) |
END IF |
END IF |
* |
* |
Line 738
|
Line 734
|
* |
* |
* C := C - W * V |
* C := C - W * V |
* |
* |
IF( LASTV.GT.K ) THEN |
IF( N.GT.K ) THEN |
* |
* |
* C1 := C1 - W * V1 |
* C1 := C1 - W * V1 |
* |
* |
CALL ZGEMM( 'No transpose', 'No transpose', |
CALL ZGEMM( 'No transpose', 'No transpose', |
$ LASTC, LASTV-K, K, -ONE, WORK, LDWORK, V, LDV, |
$ LASTC, N-K, K, -ONE, WORK, LDWORK, V, LDV, |
$ ONE, C, LDC ) |
$ ONE, C, LDC ) |
END IF |
END IF |
* |
* |
* W := W * V2 |
* W := W * V2 |
* |
* |
CALL ZTRMM( 'Right', 'Lower', 'No transpose', 'Unit', |
CALL ZTRMM( 'Right', 'Lower', 'No transpose', 'Unit', |
$ LASTC, K, ONE, V( 1, LASTV-K+1 ), LDV, |
$ LASTC, K, ONE, V( 1, N-K+1 ), LDV, |
$ WORK, LDWORK ) |
$ WORK, LDWORK ) |
* |
* |
* C1 := C1 - W |
* C1 := C1 - W |
* |
* |
DO 240 J = 1, K |
DO 240 J = 1, K |
DO 230 I = 1, LASTC |
DO 230 I = 1, LASTC |
C( I, LASTV-K+J ) = C( I, LASTV-K+J ) |
C( I, N-K+J ) = C( I, N-K+J ) - WORK( I, J ) |
$ - WORK( I, J ) |
|
230 CONTINUE |
230 CONTINUE |
240 CONTINUE |
240 CONTINUE |
* |
* |