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

integer izamax_(integer *n, doublecomplex *zx, integer *incx)
{
    /* System generated locals */
    integer ret_val, i__1;
    /* Local variables */
    static integer i__, ix;
    static doublereal smax;
    extern doublereal dcabs1_(doublecomplex *);
/*  Purpose   
    =======   
       finds the index of element having max. absolute value.   
       jack dongarra, 1/15/85.   
       modified 3/93 to return if incx .le. 0.   
       modified 12/3/93, array(1) declarations changed to array(*)   
       Parameter adjustments */
    --zx;
    /* Function Body */
    ret_val = 0;
    if (*n < 1 || *incx <= 0) {
	return ret_val;
    }
    ret_val = 1;
    if (*n == 1) {
	return ret_val;
    }
    if (*incx == 1) {
	goto L20;
    }
/*        code for increment not equal to 1 */
    ix = 1;
    smax = dcabs1_(&zx[1]);
    ix += *incx;
    i__1 = *n;
    for (i__ = 2; i__ <= i__1; ++i__) {
	if (dcabs1_(&zx[ix]) <= smax) {
	    goto L5;
	}
	ret_val = i__;
	smax = dcabs1_(&zx[ix]);
L5:
	ix += *incx;
/* L10: */
    }
    return ret_val;
/*        code for increment equal to 1 */
L20:
    smax = dcabs1_(&zx[1]);
    i__1 = *n;
    for (i__ = 2; i__ <= i__1; ++i__) {
	if (dcabs1_(&zx[i__]) <= smax) {
	    goto L30;
	}
	ret_val = i__;
	smax = dcabs1_(&zx[i__]);
L30:
	;
    }
    return ret_val;
} /* izamax_ */