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

integer isamax_(integer *n, real *sx, integer *incx)
{
    /* System generated locals */
    integer ret_val, i__1;
    real r__1;
    /* Local variables */
    static real smax;
    static integer i__, ix;
/*     finds the index of element having max. absolute value.   
       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 */
    --sx;
    /* 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 = dabs(sx[1]);
    ix += *incx;
    i__1 = *n;
    for (i__ = 2; i__ <= i__1; ++i__) {
	if ((r__1 = sx[ix], dabs(r__1)) <= smax) {
	    goto L5;
	}
	ret_val = i__;
	smax = (r__1 = sx[ix], dabs(r__1));
L5:
	ix += *incx;
/* L10: */
    }
    return ret_val;
/*        code for increment equal to 1 */
L20:
    smax = dabs(sx[1]);
    i__1 = *n;
    for (i__ = 2; i__ <= i__1; ++i__) {
	if ((r__1 = sx[i__], dabs(r__1)) <= smax) {
	    goto L30;
	}
	ret_val = i__;
	smax = (r__1 = sx[i__], dabs(r__1));
L30:
	;
    }
    return ret_val;
} /* isamax_ */

