LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ zcopy()

subroutine zcopy ( integer  N,
complex*16, dimension(*)  ZX,
integer  INCX,
complex*16, dimension(*)  ZY,
integer  INCY 
)

ZCOPY

Purpose:
    ZCOPY copies a vector, x, to a vector, y.
Parameters
[in]N
          N is INTEGER
         number of elements in input vector(s)
[in]ZX
          ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
[in]INCX
          INCX is INTEGER
         storage spacing between elements of ZX
[out]ZY
          ZY is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCY ) )
[in]INCY
          INCY is INTEGER
         storage spacing between elements of ZY
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Further Details:
     jack dongarra, linpack, 4/11/78.
     modified 12/3/93, array(1) declarations changed to array(*)

Definition at line 80 of file zcopy.f.

81 *
82 * -- Reference BLAS level1 routine --
83 * -- Reference BLAS is a software package provided by Univ. of Tennessee, --
84 * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
85 *
86 * .. Scalar Arguments ..
87  INTEGER INCX,INCY,N
88 * ..
89 * .. Array Arguments ..
90  COMPLEX*16 ZX(*),ZY(*)
91 * ..
92 *
93 * =====================================================================
94 *
95 * .. Local Scalars ..
96  INTEGER I,IX,IY
97 * ..
98  IF (n.LE.0) RETURN
99  IF (incx.EQ.1 .AND. incy.EQ.1) THEN
100 *
101 * code for both increments equal to 1
102 *
103  DO i = 1,n
104  zy(i) = zx(i)
105  END DO
106  ELSE
107 *
108 * code for unequal increments or equal increments
109 * not equal to 1
110 *
111  ix = 1
112  iy = 1
113  IF (incx.LT.0) ix = (-n+1)*incx + 1
114  IF (incy.LT.0) iy = (-n+1)*incy + 1
115  DO i = 1,n
116  zy(iy) = zx(ix)
117  ix = ix + incx
118  iy = iy + incy
119  END DO
120  END IF
121  RETURN
122 *
123 * End of ZCOPY
124 *