mirror of
https://github.com/Mercury-Language/mercury.git
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fdd141bf77
tests/invalid/*.{m,err_exp}:
tests/misc_tests/*.m:
tests/mmc_make/*.m:
tests/par_conj/*.m:
tests/purity/*.m:
tests/stm/*.m:
tests/string_format/*.m:
tests/structure_reuse/*.m:
tests/submodules/*.m:
tests/tabling/*.m:
tests/term/*.m:
tests/trailing/*.m:
tests/typeclasses/*.m:
tests/valid/*.m:
tests/warnings/*.{m,exp}:
Make these tests use four-space indentation, and ensure that
each module is imported on its own line. (I intend to use the latter
to figure out which subdirectories' tests can be executed in parallel.)
These changes usually move code to different lines. For the tests
that check compiler error messages, expect the new line numbers.
browser/cterm.m:
browser/tree234_cc.m:
Import only one module per line.
tests/hard_coded/boyer.m:
Fix something I missed.
62 lines
1.3 KiB
Mathematica
62 lines
1.3 KiB
Mathematica
% vim: ts=4 sw=4 et ft=mercury
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:- module par_fib.
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:- interface.
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:- import_module io.
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:- pred main(io::di, io::uo) is cc_multi.
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:- implementation.
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:- import_module benchmarking.
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:- import_module int.
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:- import_module list.
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:- import_module require.
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:- import_module string.
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main(!IO) :-
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perform_trial(35, Res),
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io.write_int(Res, !IO),
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io.nl(!IO).
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:- pred perform_trial(int::in, int::out) is cc_multi.
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perform_trial(N, Res) :-
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trial(N, Res, SeqTime, ParTime),
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trace [compile_time(flag("show_times")), io(!IO)] (
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io.format("fib(%d): sequential %d vs parallel %d (user times)\n",
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[i(N), i(SeqTime), i(ParTime)], !IO)
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).
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:- pred trial(int::in, int::out, int::out, int::out) is cc_multi.
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trial(N, SeqRes, SeqTime, ParTime) :-
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benchmark_det(seq_fib, N, SeqRes, 1, SeqTime),
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benchmark_det(par_fib, N, ParRes, 1, ParTime),
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require(unify(SeqRes, ParRes), "parallelism produces wrong answer").
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:- pred seq_fib(int::in, int::out) is det.
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seq_fib(N, F) :-
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( N < 2 ->
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F = 1
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;
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seq_fib(N - 1, F1),
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seq_fib(N - 2, F2),
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F = F1 + F2
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).
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:- pred par_fib(int::in, int::out) is det.
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par_fib(N, F) :-
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( N < 2 ->
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F = 1
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;
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( par_fib(N - 1, F1)
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& par_fib(N - 2, F2)
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),
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F = F1 + F2
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).
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