d4/dd2/zlacgv_8f_source.html

00001       SUBROUTINE ZLACGV( N, X, INCX )
00002 *
00003 *  -- LAPACK auxiliary routine (version 3.2) --
00004 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
00005 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
00006 *     November 2006
00007 *
00008 *     .. Scalar Arguments ..
00009       INTEGER            INCX, N
00010 *     ..
00011 *     .. Array Arguments ..
00012       COMPLEX*16         X( * )
00013 *     ..
00014 *
00015 *  Purpose
00016 *  =======
00017 *
00018 *  ZLACGV conjugates a complex vector of length N.
00019 *
00020 *  Arguments
00021 *  =========
00022 *
00023 *  N       (input) INTEGER
00024 *          The length of the vector X.  N >= 0.
00025 *
00026 *  X       (input/output) COMPLEX*16 array, dimension
00027 *                         (1+(N-1)*abs(INCX))
00028 *          On entry, the vector of length N to be conjugated.
00029 *          On exit, X is overwritten with conjg(X).
00030 *
00031 *  INCX    (input) INTEGER
00032 *          The spacing between successive elements of X.
00033 *
00034 * =====================================================================
00035 *
00036 *     .. Local Scalars ..
00037       INTEGER            I, IOFF
00038 *     ..
00039 *     .. Intrinsic Functions ..
00040       INTRINSIC          DCONJG
00041 *     ..
00042 *     .. Executable Statements ..
00043 *
00044       IF( INCX.EQ.1 ) THEN
00045          DO 10 I = 1, N
00046             X( I ) = DCONJG( X( I ) )
00047    10    CONTINUE
00048       ELSE
00049          IOFF = 1
00050          IF( INCX.LT.0 )
00051      $      IOFF = 1 - ( N-1 )*INCX
00052          DO 20 I = 1, N
00053             X( IOFF ) = DCONJG( X( IOFF ) )
00054             IOFF = IOFF + INCX
00055    20    CONTINUE
00056       END IF
00057       RETURN
00058 *
00059 *     End of ZLACGV
00060 *
00061       END