LAPACK  3.7.1
LAPACK: Linear Algebra PACKage
zcopy.f
Go to the documentation of this file.
1 *> \brief \b ZCOPY
2 *
3 * =========== DOCUMENTATION ===========
4 *
5 * Online html documentation available at
6 * http://www.netlib.org/lapack/explore-html/
7 *
8 * Definition:
9 * ===========
10 *
11 * SUBROUTINE ZCOPY(N,ZX,INCX,ZY,INCY)
12 *
13 * .. Scalar Arguments ..
14 * INTEGER INCX,INCY,N
15 * ..
16 * .. Array Arguments ..
17 * COMPLEX*16 ZX(*),ZY(*)
18 * ..
19 *
20 *
21 *> \par Purpose:
22 * =============
23 *>
24 *> \verbatim
25 *>
26 *> ZCOPY copies a vector, x, to a vector, y.
27 *> \endverbatim
28 *
29 * Arguments:
30 * ==========
31 *
32 *> \param[in] N
33 *> \verbatim
34 *> N is INTEGER
35 *> number of elements in input vector(s)
36 *> \endverbatim
37 *>
38 *> \param[in] ZX
39 *> \verbatim
40 *> ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
41 *> \endverbatim
42 *>
43 *> \param[in] INCX
44 *> \verbatim
45 *> INCX is INTEGER
46 *> storage spacing between elements of ZX
47 *> \endverbatim
48 *>
49 *> \param[out] ZY
50 *> \verbatim
51 *> ZY is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCY ) )
52 *> \endverbatim
53 *>
54 *> \param[in] INCY
55 *> \verbatim
56 *> INCY is INTEGER
57 *> storage spacing between elements of ZY
58 *> \endverbatim
59 *
60 * Authors:
61 * ========
62 *
63 *> \author Univ. of Tennessee
64 *> \author Univ. of California Berkeley
65 *> \author Univ. of Colorado Denver
66 *> \author NAG Ltd.
67 *
68 *> \date December 2016
69 *
70 *> \ingroup complex16_blas_level1
71 *
72 *> \par Further Details:
73 * =====================
74 *>
75 *> \verbatim
76 *>
77 *> jack dongarra, linpack, 4/11/78.
78 *> modified 12/3/93, array(1) declarations changed to array(*)
79 *> \endverbatim
80 *>
81 * =====================================================================
82  SUBROUTINE zcopy(N,ZX,INCX,ZY,INCY)
83 *
84 * -- Reference BLAS level1 routine (version 3.7.0) --
85 * -- Reference BLAS is a software package provided by Univ. of Tennessee, --
86 * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
87 * December 2016
88 *
89 * .. Scalar Arguments ..
90  INTEGER INCX,INCY,N
91 * ..
92 * .. Array Arguments ..
93  COMPLEX*16 ZX(*),ZY(*)
94 * ..
95 *
96 * =====================================================================
97 *
98 * .. Local Scalars ..
99  INTEGER I,IX,IY
100 * ..
101  IF (n.LE.0) RETURN
102  IF (incx.EQ.1 .AND. incy.EQ.1) THEN
103 *
104 * code for both increments equal to 1
105 *
106  DO i = 1,n
107  zy(i) = zx(i)
108  END DO
109  ELSE
110 *
111 * code for unequal increments or equal increments
112 * not equal to 1
113 *
114  ix = 1
115  iy = 1
116  IF (incx.LT.0) ix = (-n+1)*incx + 1
117  IF (incy.LT.0) iy = (-n+1)*incy + 1
118  DO i = 1,n
119  zy(iy) = zx(ix)
120  ix = ix + incx
121  iy = iy + incy
122  END DO
123  END IF
124  RETURN
125  END
subroutine zcopy(N, ZX, INCX, ZY, INCY)
ZCOPY
Definition: zcopy.f:83