/*  -- translated by f2c (version 19940927).

   You must link the resulting object file with the libraries:

	-lf2c -lm   (in that order)

*/

#include "f2c.h"

/* Subroutine */ int saxpy_(integer *n, real *sa, real *sx, integer *incx, 

	real *sy, integer *incy)

{

    /* System generated locals */

    integer i__1;

    /* Local variables */

    static integer i, m, ix, iy, mp1;

/*     constant times a vector plus a vector.   

       uses unrolled loop for increments equal to one.   

       jack dongarra, linpack, 3/11/78.   

       modified 12/3/93, array(1) declarations changed to array(*)   

   Parameter adjustments   

       Function Body */

#define SY(I) sy[(I)-1]

#define SX(I) sx[(I)-1]

    if (*n <= 0) {

	return 0;

    }

    if (*sa == 0.f) {

	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 <= *n; ++i) {

	SY(iy) += *sa * SX(ix);

	ix += *incx;

	iy += *incy;

/* L10: */

    }

    return 0;

/*        code for both increments equal to 1   

          clean-up loop */

L20:

    m = *n % 4;

    if (m == 0) {

	goto L40;

    }

    i__1 = m;

    for (i = 1; i <= m; ++i) {

	SY(i) += *sa * SX(i);

/* L30: */

    }

    if (*n < 4) {

	return 0;

    }

L40:

    mp1 = m + 1;

    i__1 = *n;

    for (i = mp1; i <= *n; i += 4) {

	SY(i) += *sa * SX(i);

	SY(i + 1) += *sa * SX(i + 1);

	SY(i + 2) += *sa * SX(i + 2);

	SY(i + 3) += *sa * SX(i + 3);

/* L50: */

    }

    return 0;

} /* saxpy_ */