forked from lijiext/lammps
117 lines
2.8 KiB
Fortran
117 lines
2.8 KiB
Fortran
*> \brief \b ZLACGV conjugates a complex vector.
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*
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* =========== DOCUMENTATION ===========
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*
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* Online html documentation available at
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* http://www.netlib.org/lapack/explore-html/
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*
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*> \htmlonly
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*> Download ZLACGV + dependencies
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zlacgv.f">
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*> [TGZ]</a>
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zlacgv.f">
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*> [ZIP]</a>
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*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zlacgv.f">
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*> [TXT]</a>
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*> \endhtmlonly
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*
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* Definition:
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* ===========
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*
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* SUBROUTINE ZLACGV( N, X, INCX )
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*
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* .. Scalar Arguments ..
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* INTEGER INCX, N
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* ..
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* .. Array Arguments ..
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* COMPLEX*16 X( * )
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* ..
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*
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*
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*> \par Purpose:
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* =============
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*>
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*> \verbatim
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*>
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*> ZLACGV conjugates a complex vector of length N.
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*> \endverbatim
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*
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* Arguments:
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* ==========
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*
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*> \param[in] N
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*> \verbatim
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*> N is INTEGER
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*> The length of the vector X. N >= 0.
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*> \endverbatim
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*>
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*> \param[in,out] X
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*> \verbatim
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*> X is COMPLEX*16 array, dimension
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*> (1+(N-1)*abs(INCX))
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*> On entry, the vector of length N to be conjugated.
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*> On exit, X is overwritten with conjg(X).
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*> \endverbatim
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*>
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*> \param[in] INCX
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*> \verbatim
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*> INCX is INTEGER
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*> The spacing between successive elements of X.
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*> \endverbatim
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*
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* Authors:
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* ========
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*
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*> \author Univ. of Tennessee
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*> \author Univ. of California Berkeley
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*> \author Univ. of Colorado Denver
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*> \author NAG Ltd.
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*
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*> \date December 2016
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*
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*> \ingroup complex16OTHERauxiliary
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*
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* =====================================================================
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SUBROUTINE ZLACGV( N, X, INCX )
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*
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* -- LAPACK auxiliary routine (version 3.7.0) --
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* -- LAPACK is a software package provided by Univ. of Tennessee, --
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* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
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* December 2016
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*
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* .. Scalar Arguments ..
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INTEGER INCX, N
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* ..
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* .. Array Arguments ..
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COMPLEX*16 X( * )
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* ..
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*
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* =====================================================================
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*
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* .. Local Scalars ..
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INTEGER I, IOFF
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* ..
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* .. Intrinsic Functions ..
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INTRINSIC DCONJG
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* ..
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* .. Executable Statements ..
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*
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IF( INCX.EQ.1 ) THEN
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DO 10 I = 1, N
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X( I ) = DCONJG( X( I ) )
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10 CONTINUE
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ELSE
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IOFF = 1
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IF( INCX.LT.0 )
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$ IOFF = 1 - ( N-1 )*INCX
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DO 20 I = 1, N
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X( IOFF ) = DCONJG( X( IOFF ) )
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IOFF = IOFF + INCX
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20 CONTINUE
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END IF
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RETURN
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*
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* End of ZLACGV
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*
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END
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