3 * =========== DOCUMENTATION ===========
5 * Online html documentation available at
6 * http://www.netlib.org/lapack/explore-html/
11 * SUBROUTINE DCOPY(N,DX,INCX,DY,INCY)
13 * .. Scalar Arguments ..
16 * .. Array Arguments ..
17 * DOUBLE PRECISION DX(*),DY(*)
26 *> DCOPY copies a vector, x, to a vector, y.
27 *> uses unrolled loops for increments equal to one.
33 *> \author Univ. of Tennessee
34 *> \author Univ. of California Berkeley
35 *> \author Univ. of Colorado Denver
38 *> \date November 2011
40 *> \ingroup double_blas_level1
42 *> \par Further Details:
43 * =====================
47 *> jack dongarra, linpack, 3/11/78.
48 *> modified 12/3/93, array(1) declarations changed to array(*)
51 * =====================================================================
52 SUBROUTINE DCOPY(N,DX,INCX,DY,INCY)
54 * -- Reference BLAS level1 routine (version 3.4.0) --
55 * -- Reference BLAS is a software package provided by Univ. of Tennessee, --
56 * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
59 * .. Scalar Arguments ..
62 * .. Array Arguments ..
63 DOUBLE PRECISION DX(*),DY(*)
66 * =====================================================================
71 * .. Intrinsic Functions ..
75 IF (INCX.EQ.1 .AND. INCY.EQ.1) THEN
77 * code for both increments equal to 1
101 * code for unequal increments or equal increments
106 IF (INCX.LT.0) IX = (-N+1)*INCX + 1
107 IF (INCY.LT.0) IY = (-N+1)*INCY + 1