/*  VAX C-Prolog Benchmark Package  /*
/*  Copyright 1985 by Tektronix, Inc., and Portland State University  /*
 
 
/*  Get an average cpu time for 5 different parameters  */
 
test_primes :-
nl, write('!**  BEGIN Primes BENCHMARK'), nl,
ave_primes(10),
ave_primes(20),
ave_primes(40),
ave_primes(60),
ave_primes(80),
nl, write('!**  END Primes BENCHMARK'), nl.
 
/*  call the benchmark 3 times and calculate the average  */
 
ave_primes(P) :-
call_primes(P,T1),
call_primes(P,T2),
call_primes(P,T3),
calc_ave_primes(P,T1,T2,T3).
 
/*  call benchmark and return cputime in msecs.  */
 
call_primes(P,T) :-
T1 is cputime,
primes(P,P_list),
T2 is cputime,
T is 1000*(T2-T1).
 
/*  calculate average of 3 times for parameter P  */
 
calc_ave_primes(P,T1,T2,T3) :-
Ave is (T1+T2+T3)/3,
nl, write('!**  Average cputime for '),
write(P), write(' primes is '),
write(Ave), write(' msecs.'), nl.
 
:- test_primes.
 
