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| author | jofret | 2009-04-28 07:17:00 +0000 |
|---|---|---|
| committer | jofret | 2009-04-28 07:17:00 +0000 |
| commit | 8c8d2f518968ce7057eec6aa5cd5aec8faab861a (patch) | |
| tree | 3dd1788b71d6a3ce2b73d2d475a3133580e17530 /src/lib/lapack/zungl2.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/zungl2.f')
| -rw-r--r-- | src/lib/lapack/zungl2.f | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/src/lib/lapack/zungl2.f b/src/lib/lapack/zungl2.f deleted file mode 100644 index 502411b4..00000000 --- a/src/lib/lapack/zungl2.f +++ /dev/null @@ -1,136 +0,0 @@ - SUBROUTINE ZUNGL2( M, N, K, A, LDA, TAU, WORK, INFO ) -* -* -- LAPACK routine (version 3.1) -- -* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. -* November 2006 -* -* .. Scalar Arguments .. - INTEGER INFO, K, LDA, M, N -* .. -* .. Array Arguments .. - COMPLEX*16 A( LDA, * ), TAU( * ), WORK( * ) -* .. -* -* Purpose -* ======= -* -* ZUNGL2 generates an m-by-n complex matrix Q with orthonormal rows, -* which is defined as the first m rows of a product of k elementary -* reflectors of order n -* -* Q = H(k)' . . . H(2)' H(1)' -* -* as returned by ZGELQF. -* -* Arguments -* ========= -* -* M (input) INTEGER -* The number of rows of the matrix Q. M >= 0. -* -* N (input) INTEGER -* The number of columns of the matrix Q. N >= M. -* -* K (input) INTEGER -* The number of elementary reflectors whose product defines the -* matrix Q. M >= K >= 0. -* -* A (input/output) COMPLEX*16 array, dimension (LDA,N) -* On entry, the i-th row must contain the vector which defines -* the elementary reflector H(i), for i = 1,2,...,k, as returned -* by ZGELQF in the first k rows of its array argument A. -* On exit, the m by n matrix Q. -* -* LDA (input) INTEGER -* The first dimension of the array A. LDA >= max(1,M). -* -* TAU (input) COMPLEX*16 array, dimension (K) -* TAU(i) must contain the scalar factor of the elementary -* reflector H(i), as returned by ZGELQF. -* -* WORK (workspace) COMPLEX*16 array, dimension (M) -* -* INFO (output) INTEGER -* = 0: successful exit -* < 0: if INFO = -i, the i-th argument has an illegal value -* -* ===================================================================== -* -* .. Parameters .. - COMPLEX*16 ONE, ZERO - PARAMETER ( ONE = ( 1.0D+0, 0.0D+0 ), - $ ZERO = ( 0.0D+0, 0.0D+0 ) ) -* .. -* .. Local Scalars .. - INTEGER I, J, L -* .. -* .. External Subroutines .. - EXTERNAL XERBLA, ZLACGV, ZLARF, ZSCAL -* .. -* .. Intrinsic Functions .. - INTRINSIC DCONJG, MAX -* .. -* .. Executable Statements .. -* -* Test the input arguments -* - INFO = 0 - IF( M.LT.0 ) THEN - INFO = -1 - ELSE IF( N.LT.M ) THEN - INFO = -2 - ELSE IF( K.LT.0 .OR. K.GT.M ) THEN - INFO = -3 - ELSE IF( LDA.LT.MAX( 1, M ) ) THEN - INFO = -5 - END IF - IF( INFO.NE.0 ) THEN - CALL XERBLA( 'ZUNGL2', -INFO ) - RETURN - END IF -* -* Quick return if possible -* - IF( M.LE.0 ) - $ RETURN -* - IF( K.LT.M ) THEN -* -* Initialise rows k+1:m to rows of the unit matrix -* - DO 20 J = 1, N - DO 10 L = K + 1, M - A( L, J ) = ZERO - 10 CONTINUE - IF( J.GT.K .AND. J.LE.M ) - $ A( J, J ) = ONE - 20 CONTINUE - END IF -* - DO 40 I = K, 1, -1 -* -* Apply H(i)' to A(i:m,i:n) from the right -* - IF( I.LT.N ) THEN - CALL ZLACGV( N-I, A( I, I+1 ), LDA ) - IF( I.LT.M ) THEN - A( I, I ) = ONE - CALL ZLARF( 'Right', M-I, N-I+1, A( I, I ), LDA, - $ DCONJG( TAU( I ) ), A( I+1, I ), LDA, WORK ) - END IF - CALL ZSCAL( N-I, -TAU( I ), A( I, I+1 ), LDA ) - CALL ZLACGV( N-I, A( I, I+1 ), LDA ) - END IF - A( I, I ) = ONE - DCONJG( TAU( I ) ) -* -* Set A(i,1:i-1) to zero -* - DO 30 L = 1, I - 1 - A( I, L ) = ZERO - 30 CONTINUE - 40 CONTINUE - RETURN -* -* End of ZUNGL2 -* - END |