Function dcopy_

numpy/linalg/lapack_lite/f2c_blas.c:6642–6736

Subroutine */

} /* dcabs1_ */

/* Subroutine */ int dcopy_(integer *n, doublereal *dx, integer *incx,
	doublereal *dy, integer *incy)
{
    /* System generated locals */
    integer i__1;

    /* Local variables */
    static integer i__, m, ix, iy, mp1;


/*
    Purpose
    =======

       DCOPY copies a vector, x, to a vector, y.
       uses unrolled loops for increments equal to one.

    Further Details
    ===============

       jack dongarra, linpack, 3/11/78.
       modified 12/3/93, array(1) declarations changed to array(*)

    =====================================================================
*/

    /* Parameter adjustments */
    --dy;
    --dx;

    /* Function Body */
    if (*n <= 0) {
	return 0;
    }
    if (*incx == 1 && *incy == 1) {
	goto L20;
    }

/*
          code for unequal increments or equal increments
            not equal to 1
*/

    ix = 1;
    iy = 1;
    if (*incx < 0) {
	ix = (-(*n) + 1) * *incx + 1;
    }
    if (*incy < 0) {
	iy = (-(*n) + 1) * *incy + 1;
    }
    i__1 = *n;
    for (i__ = 1; i__ <= i__1; ++i__) {
	dy[iy] = dx[ix];
	ix += *incx;
	iy += *incy;
/* L10: */
    }