153 SUBROUTINE clavhe( UPLO, TRANS, DIAG, N, NRHS, A, LDA, IPIV, B,
162 CHARACTER diag, trans, uplo
163 INTEGER info, lda, ldb, n, nrhs
167 COMPLEX a( lda, * ),
b( ldb, * )
174 parameter( one = ( 1.0e+0, 0.0e+0 ) )
179 COMPLEX d11, d12, d21, d22, t1, t2
189 INTRINSIC abs, conjg, max
196 IF( .NOT.
lsame( uplo,
'U' ) .AND. .NOT.
lsame( uplo,
'L' ) )
THEN
198 ELSE IF( .NOT.
lsame( trans,
'N' ) .AND. .NOT.
lsame( trans,
'C' ) )
201 ELSE IF( .NOT.
lsame( diag,
'U' ) .AND. .NOT.
lsame( diag,
'N' ) )
204 ELSE IF( n.LT.0 )
THEN
206 ELSE IF( lda.LT.max( 1, n ) )
THEN
208 ELSE IF( ldb.LT.max( 1, n ) )
THEN
212 CALL
xerbla(
'CLAVHE ', -info )
221 nounit =
lsame( diag,
'N' )
227 IF(
lsame( trans,
'N' ) )
THEN
232 IF(
lsame( uplo,
'U' ) )
THEN
240 IF( ipiv( k ).GT.0 )
THEN
247 $ CALL
cscal( nrhs, a( k, k ),
b( k, 1 ), ldb )
255 CALL
cgeru( k-1, nrhs, one, a( 1, k ), 1,
b( k, 1 ),
256 $ ldb,
b( 1, 1 ), ldb )
262 $ CALL
cswap( nrhs,
b( k, 1 ), ldb,
b( kp, 1 ), ldb )
279 b( k,
j ) = d11*t1 + d12*t2
280 b( k+1,
j ) = d21*t1 + d22*t2
290 CALL
cgeru( k-1, nrhs, one, a( 1, k ), 1,
b( k, 1 ),
291 $ ldb,
b( 1, 1 ), ldb )
292 CALL
cgeru( k-1, nrhs, one, a( 1, k+1 ), 1,
293 $
b( k+1, 1 ), ldb,
b( 1, 1 ), ldb )
297 kp = abs( ipiv( k ) )
299 $ CALL
cswap( nrhs,
b( k, 1 ), ldb,
b( kp, 1 ), ldb )
321 IF( ipiv( k ).GT.0 )
THEN
328 $ CALL
cscal( nrhs, a( k, k ),
b( k, 1 ), ldb )
337 CALL
cgeru( n-k, nrhs, one, a( k+1, k ), 1,
338 $
b( k, 1 ), ldb,
b( k+1, 1 ), ldb )
344 $ CALL
cswap( nrhs,
b( k, 1 ), ldb,
b( kp, 1 ), ldb )
362 b( k-1,
j ) = d11*t1 + d12*t2
363 b( k,
j ) = d21*t1 + d22*t2
373 CALL
cgeru( n-k, nrhs, one, a( k+1, k ), 1,
374 $
b( k, 1 ), ldb,
b( k+1, 1 ), ldb )
375 CALL
cgeru( n-k, nrhs, one, a( k+1, k-1 ), 1,
376 $
b( k-1, 1 ), ldb,
b( k+1, 1 ), ldb )
381 kp = abs( ipiv( k ) )
383 $ CALL
cswap( nrhs,
b( k, 1 ), ldb,
b( kp, 1 ), ldb )
401 IF(
lsame( uplo,
'U' ) )
THEN
411 IF( ipiv( k ).GT.0 )
THEN
418 $ CALL
cswap( nrhs,
b( k, 1 ), ldb,
b( kp, 1 ), ldb )
424 CALL
clacgv( nrhs,
b( k, 1 ), ldb )
425 CALL
cgemv(
'Conjugate', k-1, nrhs, one,
b, ldb,
426 $ a( 1, k ), 1, one,
b( k, 1 ), ldb )
427 CALL
clacgv( nrhs,
b( k, 1 ), ldb )
430 $ CALL
cscal( nrhs, a( k, k ),
b( k, 1 ), ldb )
440 kp = abs( ipiv( k ) )
442 $ CALL
cswap( nrhs,
b( k-1, 1 ), ldb,
b( kp, 1 ),
450 CALL
clacgv( nrhs,
b( k, 1 ), ldb )
451 CALL
cgemv(
'Conjugate', k-2, nrhs, one,
b, ldb,
452 $ a( 1, k ), 1, one,
b( k, 1 ), ldb )
453 CALL
clacgv( nrhs,
b( k, 1 ), ldb )
455 CALL
clacgv( nrhs,
b( k-1, 1 ), ldb )
456 CALL
cgemv(
'Conjugate', k-2, nrhs, one,
b, ldb,
457 $ a( 1, k-1 ), 1, one,
b( k-1, 1 ), ldb )
458 CALL
clacgv( nrhs,
b( k-1, 1 ), ldb )
471 b( k-1,
j ) = d11*t1 + d12*t2
472 b( k,
j ) = d21*t1 + d22*t2
495 IF( ipiv( k ).GT.0 )
THEN
502 $ CALL
cswap( nrhs,
b( k, 1 ), ldb,
b( kp, 1 ), ldb )
506 CALL
clacgv( nrhs,
b( k, 1 ), ldb )
507 CALL
cgemv(
'Conjugate', n-k, nrhs, one,
b( k+1, 1 ),
508 $ ldb, a( k+1, k ), 1, one,
b( k, 1 ), ldb )
509 CALL
clacgv( nrhs,
b( k, 1 ), ldb )
512 $ CALL
cscal( nrhs, a( k, k ),
b( k, 1 ), ldb )
522 kp = abs( ipiv( k ) )
524 $ CALL
cswap( nrhs,
b( k+1, 1 ), ldb,
b( kp, 1 ),
529 CALL
clacgv( nrhs,
b( k+1, 1 ), ldb )
530 CALL
cgemv(
'Conjugate', n-k-1, nrhs, one,
531 $
b( k+2, 1 ), ldb, a( k+2, k+1 ), 1, one,
533 CALL
clacgv( nrhs,
b( k+1, 1 ), ldb )
535 CALL
clacgv( nrhs,
b( k, 1 ), ldb )
536 CALL
cgemv(
'Conjugate', n-k-1, nrhs, one,
537 $
b( k+2, 1 ), ldb, a( k+2, k ), 1, one,
539 CALL
clacgv( nrhs,
b( k, 1 ), ldb )
552 b( k,
j ) = d11*t1 + d12*t2
553 b( k+1,
j ) = d21*t1 + d22*t2