67 lines
1.8 KiB
Perl
67 lines
1.8 KiB
Perl
|
% ----------------------------------------------------------------------
|
||
|
|
% The Computer Language Benchmarks Game
|
||
|
|
% http://shootout.alioth.debian.org/
|
||
|
|
%
|
||
|
|
% Based on D language implementation by David Fladebo
|
||
|
|
% Contributed by Anthony Borla
|
||
|
|
% Modified to run with YAP by Glendon Holst
|
||
|
|
% ----------------------------------------------------------------------
|
||
|
|
|
||
|
|
:- yap_flag(unknown,error).
|
||
|
|
|
||
|
|
:- initialization(main).
|
||
|
|
|
||
|
|
main :-
|
||
|
|
unix( argv([H|_]) ), number_atom(N,H),
|
||
|
|
compute_sums(N, SUMS),
|
||
|
|
print_sums(SUMS),
|
||
|
|
|
||
|
|
statistics,
|
||
|
|
statistics_jit.
|
||
|
|
|
||
|
|
% ------------------------------- %
|
||
|
|
|
||
|
|
compute_sums(N, SUMS) :-
|
||
|
|
SUMS0 = [0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0],
|
||
|
|
compute_sums_(1.0, N, 1.0, SUMS0, SUMS).
|
||
|
|
|
||
|
|
% ------------- %
|
||
|
|
|
||
|
|
compute_sums_(D, N, _, SUMS, SUMS) :- D > N, !.
|
||
|
|
|
||
|
|
compute_sums_(D, N, ALT, SUMS0, SUMS) :-
|
||
|
|
SUMS0 = [A1, A2, A3, A4, A5, A6, A7, A8, A9],
|
||
|
|
|
||
|
|
D2 is D * D, D3 is D2 * D, DS is sin(D), DC is cos(D),
|
||
|
|
|
||
|
|
A1N is A1 + (2 / 3.0) ** (D - 1.0),
|
||
|
|
A2N is A2 + 1 / sqrt(D),
|
||
|
|
A3N is A3 + 1 / (D * (D + 1)),
|
||
|
|
A4N is A4 + 1 / (D3 * DS * DS),
|
||
|
|
A5N is A5 + 1 / (D3 * DC * DC),
|
||
|
|
A6N is A6 + 1 / D,
|
||
|
|
A7N is A7 + 1 / (D2),
|
||
|
|
A8N is A8 + ALT / D,
|
||
|
|
A9N is A9 + ALT / (2 * D - 1),
|
||
|
|
|
||
|
|
SUMS1 = [A1N, A2N, A3N, A4N, A5N, A6N, A7N, A8N, A9N],
|
||
|
|
DN is D + 1.0, ALTN is -ALT, !,
|
||
|
|
compute_sums_(DN, N, ALTN, SUMS1, SUMS).
|
||
|
|
|
||
|
|
% ------------------------------- %
|
||
|
|
|
||
|
|
print_sums(SUMS) :-
|
||
|
|
SUMS = [A1, A2, A3, A4, A5, A6, A7, A8, A9],
|
||
|
|
|
||
|
|
format('~9f\t~w\n', [A1, '(2/3)^k']),
|
||
|
|
format('~9f\t~w\n', [A2, 'k^-0.5']),
|
||
|
|
format('~9f\t~w\n', [A3, '1/k(k+1)']),
|
||
|
|
format('~9f\t~w\n', [A4, 'Flint Hills']),
|
||
|
|
format('~9f\t~w\n', [A5, 'Cookson Hills']),
|
||
|
|
format('~9f\t~w\n', [A6, 'Harmonic']),
|
||
|
|
format('~9f\t~w\n', [A7, 'Riemann Zeta']),
|
||
|
|
format('~9f\t~w\n', [A8, 'Alternating Harmonic']),
|
||
|
|
format('~9f\t~w\n', [A9, 'Gregory']).
|
||
|
|
|
||
|
|
% ------------------------------- %
|