#include "blaswrap.h"
#include "f2c.h"

doublereal dasum_(integer *n, doublereal *dx, integer *incx)
{
    /* System generated locals */
    integer i__1, i__2;
    doublereal ret_val, d__1, d__2, d__3, d__4, d__5, d__6;
    /* Local variables */
    static integer i__, m, mp1;
    static doublereal dtemp;
    static integer nincx;
/*  Purpose   
    =======   
       takes the sum of the absolute values.   
       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 */
    ret_val = 0.;
    dtemp = 0.;
    if (*n <= 0 || *incx <= 0) {
	return ret_val;
    }
    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) {
	dtemp += (d__1 = dx[i__], abs(d__1));
/* L10: */
    }
    ret_val = dtemp;
    return ret_val;
/*        code for increment equal to 1   
          clean-up loop */
L20:
    m = *n % 6;
    if (m == 0) {
	goto L40;
    }
    i__2 = m;
    for (i__ = 1; i__ <= i__2; ++i__) {
	dtemp += (d__1 = dx[i__], abs(d__1));
/* L30: */
    }
    if (*n < 6) {
	goto L60;
    }
L40:
    mp1 = m + 1;
    i__2 = *n;
    for (i__ = mp1; i__ <= i__2; i__ += 6) {
	dtemp = dtemp + (d__1 = dx[i__], abs(d__1)) + (d__2 = dx[i__ + 1], 
		abs(d__2)) + (d__3 = dx[i__ + 2], abs(d__3)) + (d__4 = dx[i__ 
		+ 3], abs(d__4)) + (d__5 = dx[i__ + 4], abs(d__5)) + (d__6 = 
		dx[i__ + 5], abs(d__6));
/* L50: */
    }
L60:
    ret_val = dtemp;
    return ret_val;
} /* dasum_ */