/**********
Copyright 1990 Regents of the University of California.  All rights reserved.
Author: 1989 Jaijeet S. Roychowdhury
**********/

#include "spice.h"
#include "distodef.h"
#include "suffix.h"

/*
 * PlusDeriv computes the partial derivatives of the addition
 * function where the arguments to the function are
 * functions of three variables p, q, and r.
 */

void
PlusDeriv(new, old1, old2)
Dderivs *new, *old1, *old2;
{

new->value = old1->value + old2->value;
new->d1_p = old1->d1_p  + old2->d1_p ;
new->d1_q = old1->d1_q  + old2->d1_q ;
new->d1_r = old1->d1_r  + old2->d1_r ;
new->d2_p2 = old1->d2_p2  + old2->d2_p2 ;
new->d2_q2 = old1->d2_q2  + old2->d2_q2 ;
new->d2_r2 = old1->d2_r2  + old2->d2_r2 ;
new->d2_pq = old1->d2_pq  + old2->d2_pq ;
new->d2_qr = old1->d2_qr  + old2->d2_qr ;
new->d2_pr = old1->d2_pr  + old2->d2_pr ;
new->d3_p3 = 
		old1->d3_p3  
		+ old2->d3_p3 ;
new->d3_q3 = 
		old1->d3_q3  
		+ old2->d3_q3 ;
new->d3_r3 = 
		old1->d3_r3  
		+ old2->d3_r3 ;
new->d3_p2r = 
		old1->d3_p2r  
		+ old2->d3_p2r ;
new->d3_p2q = 
		old1->d3_p2q  
		+ old2->d3_p2q ;
new->d3_q2r = 
		old1->d3_q2r  
		+ old2->d3_q2r ;
new->d3_pq2 = 
		old1->d3_pq2  
		+ old2->d3_pq2 ;
new->d3_pr2 = 
		old1->d3_pr2  
		+ old2->d3_pr2 ;
new->d3_qr2 = 
		old1->d3_qr2  
		+ old2->d3_qr2 ;
new->d3_pqr = 
		old1->d3_pqr  
		+ old2->d3_pqr ;
		}
