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author | jofret | 2009-04-28 07:17:00 +0000 |
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committer | jofret | 2009-04-28 07:17:00 +0000 |
commit | 8c8d2f518968ce7057eec6aa5cd5aec8faab861a (patch) | |
tree | 3dd1788b71d6a3ce2b73d2d475a3133580e17530 /src/lib/lapack/zungtr.f | |
parent | 9f652ffc16a310ac6641a9766c5b9e2671e0e9cb (diff) | |
download | scilab2c-8c8d2f518968ce7057eec6aa5cd5aec8faab861a.tar.gz scilab2c-8c8d2f518968ce7057eec6aa5cd5aec8faab861a.tar.bz2 scilab2c-8c8d2f518968ce7057eec6aa5cd5aec8faab861a.zip |
Moving lapack to right place
Diffstat (limited to 'src/lib/lapack/zungtr.f')
-rw-r--r-- | src/lib/lapack/zungtr.f | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/src/lib/lapack/zungtr.f b/src/lib/lapack/zungtr.f deleted file mode 100644 index 5de7c109..00000000 --- a/src/lib/lapack/zungtr.f +++ /dev/null @@ -1,184 +0,0 @@ - SUBROUTINE ZUNGTR( UPLO, N, A, LDA, TAU, WORK, LWORK, INFO ) -* -* -- LAPACK routine (version 3.1) -- -* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. -* November 2006 -* -* .. Scalar Arguments .. - CHARACTER UPLO - INTEGER INFO, LDA, LWORK, N -* .. -* .. Array Arguments .. - COMPLEX*16 A( LDA, * ), TAU( * ), WORK( * ) -* .. -* -* Purpose -* ======= -* -* ZUNGTR generates a complex unitary matrix Q which is defined as the -* product of n-1 elementary reflectors of order N, as returned by -* ZHETRD: -* -* if UPLO = 'U', Q = H(n-1) . . . H(2) H(1), -* -* if UPLO = 'L', Q = H(1) H(2) . . . H(n-1). -* -* Arguments -* ========= -* -* UPLO (input) CHARACTER*1 -* = 'U': Upper triangle of A contains elementary reflectors -* from ZHETRD; -* = 'L': Lower triangle of A contains elementary reflectors -* from ZHETRD. -* -* N (input) INTEGER -* The order of the matrix Q. N >= 0. -* -* A (input/output) COMPLEX*16 array, dimension (LDA,N) -* On entry, the vectors which define the elementary reflectors, -* as returned by ZHETRD. -* On exit, the N-by-N unitary matrix Q. -* -* LDA (input) INTEGER -* The leading dimension of the array A. LDA >= N. -* -* TAU (input) COMPLEX*16 array, dimension (N-1) -* TAU(i) must contain the scalar factor of the elementary -* reflector H(i), as returned by ZHETRD. -* -* WORK (workspace/output) COMPLEX*16 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. LWORK >= N-1. -* For optimum performance LWORK >= (N-1)*NB, 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 .. - COMPLEX*16 ZERO, ONE - PARAMETER ( ZERO = ( 0.0D+0, 0.0D+0 ), - $ ONE = ( 1.0D+0, 0.0D+0 ) ) -* .. -* .. Local Scalars .. - LOGICAL LQUERY, UPPER - INTEGER I, IINFO, J, LWKOPT, NB -* .. -* .. External Functions .. - LOGICAL LSAME - INTEGER ILAENV - EXTERNAL LSAME, ILAENV -* .. -* .. External Subroutines .. - EXTERNAL XERBLA, ZUNGQL, ZUNGQR -* .. -* .. Intrinsic Functions .. - INTRINSIC MAX -* .. -* .. Executable Statements .. -* -* Test the input arguments -* - INFO = 0 - LQUERY = ( LWORK.EQ.-1 ) - UPPER = LSAME( UPLO, 'U' ) - IF( .NOT.UPPER .AND. .NOT.LSAME( UPLO, 'L' ) ) THEN - INFO = -1 - ELSE IF( N.LT.0 ) THEN - INFO = -2 - ELSE IF( LDA.LT.MAX( 1, N ) ) THEN - INFO = -4 - ELSE IF( LWORK.LT.MAX( 1, N-1 ) .AND. .NOT.LQUERY ) THEN - INFO = -7 - END IF -* - IF( INFO.EQ.0 ) THEN - IF( UPPER ) THEN - NB = ILAENV( 1, 'ZUNGQL', ' ', N-1, N-1, N-1, -1 ) - ELSE - NB = ILAENV( 1, 'ZUNGQR', ' ', N-1, N-1, N-1, -1 ) - END IF - LWKOPT = MAX( 1, N-1 )*NB - WORK( 1 ) = LWKOPT - END IF -* - IF( INFO.NE.0 ) THEN - CALL XERBLA( 'ZUNGTR', -INFO ) - RETURN - ELSE IF( LQUERY ) THEN - RETURN - END IF -* -* Quick return if possible -* - IF( N.EQ.0 ) THEN - WORK( 1 ) = 1 - RETURN - END IF -* - IF( UPPER ) THEN -* -* Q was determined by a call to ZHETRD with UPLO = 'U' -* -* Shift the vectors which define the elementary reflectors one -* column to the left, and set the last row and column of Q to -* those of the unit matrix -* - DO 20 J = 1, N - 1 - DO 10 I = 1, J - 1 - A( I, J ) = A( I, J+1 ) - 10 CONTINUE - A( N, J ) = ZERO - 20 CONTINUE - DO 30 I = 1, N - 1 - A( I, N ) = ZERO - 30 CONTINUE - A( N, N ) = ONE -* -* Generate Q(1:n-1,1:n-1) -* - CALL ZUNGQL( N-1, N-1, N-1, A, LDA, TAU, WORK, LWORK, IINFO ) -* - ELSE -* -* Q was determined by a call to ZHETRD with UPLO = 'L'. -* -* Shift the vectors which define the elementary reflectors one -* column to the right, and set the first row and column of Q to -* those of the unit matrix -* - DO 50 J = N, 2, -1 - A( 1, J ) = ZERO - DO 40 I = J + 1, N - A( I, J ) = A( I, J-1 ) - 40 CONTINUE - 50 CONTINUE - A( 1, 1 ) = ONE - DO 60 I = 2, N - A( I, 1 ) = ZERO - 60 CONTINUE - IF( N.GT.1 ) THEN -* -* Generate Q(2:n,2:n) -* - CALL ZUNGQR( N-1, N-1, N-1, A( 2, 2 ), LDA, TAU, WORK, - $ LWORK, IINFO ) - END IF - END IF - WORK( 1 ) = LWKOPT - RETURN -* -* End of ZUNGTR -* - END |