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zlacgv.f
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1996-09-28
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SUBROUTINE ZLACGV( N, X, INCX )
*
* -- LAPACK auxiliary routine (version 2.0) --
* Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd.,
* Courant Institute, Argonne National Lab, and Rice University
* October 31, 1992
*
* .. Scalar Arguments ..
INTEGER INCX, N
* ..
* .. Array Arguments ..
COMPLEX*16 X( * )
* ..
*
* Purpose
* =======
*
* ZLACGV conjugates a complex vector of length N.
*
* Arguments
* =========
*
* N (input) INTEGER
* The length of the vector X. N >= 0.
*
* X (input/output) COMPLEX*16 array, dimension
* (1+(N-1)*abs(INCX))
* On entry, the vector of length N to be conjugated.
* On exit, X is overwritten with conjg(X).
*
* INCX (input) INTEGER
* The spacing between successive elements of X.
*
* =====================================================================
*
* .. Local Scalars ..
INTEGER I, IOFF
* ..
* .. Intrinsic Functions ..
INTRINSIC DCONJG
* ..
* .. Executable Statements ..
*
IF( INCX.EQ.1 ) THEN
DO 10 I = 1, N
X( I ) = DCONJG( X( I ) )
10 CONTINUE
ELSE
IOFF = 1
IF( INCX.LT.0 )
$ IOFF = 1 - ( N-1 )*INCX
DO 20 I = 1, N
X( IOFF ) = DCONJG( X( IOFF ) )
IOFF = IOFF + INCX
20 CONTINUE
END IF
RETURN
*
* End of ZLACGV
*
END