Function dscal_

numpy/linalg/lapack_lite/f2c_blas.c:7818–7899

Subroutine */

} /* drot_ */

/* Subroutine */ int dscal_(integer *n, doublereal *da, doublereal *dx,
	integer *incx)
{
    /* System generated locals */
    integer i__1, i__2;

    /* Local variables */
    static integer i__, m, mp1, nincx;


/*
    Purpose
    =======

       DSCAL scales a vector by a constant.
       uses unrolled loops for increment equal to one.

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

       jack dongarra, linpack, 3/11/78.
       modified 3/93 to return if incx .le. 0.
       modified 12/3/93, array(1) declarations changed to array(*)

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

    /* Parameter adjustments */
    --dx;

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

/*        code for increment not equal to 1 */

    nincx = *n * *incx;
    i__1 = nincx;
    i__2 = *incx;
    for (i__ = 1; i__2 < 0 ? i__ >= i__1 : i__ <= i__1; i__ += i__2) {
	dx[i__] = *da * dx[i__];
/* L10: */
    }
    return 0;

/*
          code for increment equal to 1


          clean-up loop
*/

L20:
    m = *n % 5;