diff options
Diffstat (limited to 'gmp-6.3.0/tests/mpz/t-fib_ui.c')
| -rw-r--r-- | gmp-6.3.0/tests/mpz/t-fib_ui.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/gmp-6.3.0/tests/mpz/t-fib_ui.c b/gmp-6.3.0/tests/mpz/t-fib_ui.c new file mode 100644 index 0000000..ec9425c --- /dev/null +++ b/gmp-6.3.0/tests/mpz/t-fib_ui.c @@ -0,0 +1,155 @@ +/* Test mpz_fib_ui and mpz_fib2_ui. + +Copyright 2000-2002 Free Software Foundation, Inc. + +This file is part of the GNU MP Library test suite. + +The GNU MP Library test suite is free software; you can redistribute it +and/or modify it under the terms of the GNU General Public License as +published by the Free Software Foundation; either version 3 of the License, +or (at your option) any later version. + +The GNU MP Library test suite is distributed in the hope that it will be +useful, but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General +Public License for more details. + +You should have received a copy of the GNU General Public License along with +the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */ + +#include <stdio.h> +#include <stdlib.h> +#include "gmp-impl.h" +#include "tests.h" + + +/* Usage: t-fib_ui [x|num] + + Run with no arguments, tests goes up to the initial value of "limit" + below. With a number argument tests are carried up that far, or with a + literal "x" tests are continued without limit (this being only meant for + development purposes). + + The size tests performed are designed to partially replicate what will be + going on in mpz_fib_ui. There's plenty of ASSERTs there, but of course + they're not normally enabled. + + Misfeatures: + + The tests on MPN_FIB2_SIZE are a bit useless, since that macro includes a + +2 for the internal purposes of mpn_fib2_ui. It's probably better to + give mpn_fib2_ui a run with assertion checking enabled. */ + + +#define MPZ_FIB_SIZE_FLOAT(n) \ + ((mp_size_t) ((n) * 0.6942419 / GMP_NUMB_BITS + 1)) + + +void +check_fib_table (void) +{ + int i; + mp_limb_t want; + + ASSERT_ALWAYS (FIB_TABLE(-1) == 1); + ASSERT_ALWAYS (FIB_TABLE(0) == 0); + + for (i = 1; i <= FIB_TABLE_LIMIT; i++) + { + want = FIB_TABLE(i-1) + FIB_TABLE(i-2); + if (FIB_TABLE(i) != want) + { + printf ("FIB_TABLE(%d) wrong\n", i); + gmp_printf (" got %#Nx\n", &FIB_TABLE(i), 1); + gmp_printf (" want %#Nx\n", &want, 1); + abort (); + } + } +} + + +int +main (int argc, char *argv[]) +{ + unsigned long n; + unsigned long limit = 100 * GMP_LIMB_BITS; + mpz_t want_fn, want_fn1, got_fn, got_fn1; + + tests_start (); + mp_trace_base = -16; + if (argc > 1 && argv[1][0] == 'x') + limit = ULONG_MAX; + else + TESTS_REPS (limit, argv, argc); + + check_fib_table (); + + /* start at n==0 */ + mpz_init_set_ui (want_fn1, 1); /* F[-1] */ + mpz_init_set_ui (want_fn, 0); /* F[0] */ + mpz_init (got_fn); + mpz_init (got_fn1); + + for (n = 0; n < limit; n++) + { + /* check our float formula seems right */ + if (MPZ_FIB_SIZE_FLOAT (n) < SIZ(want_fn)) + { + printf ("MPZ_FIB_SIZE_FLOAT wrong at n=%lu\n", n); + printf (" MPZ_FIB_SIZE_FLOAT %ld\n", MPZ_FIB_SIZE_FLOAT (n)); + printf (" SIZ(want_fn) %d\n", SIZ(want_fn)); + abort (); + } + + /* check MPN_FIB2_SIZE seems right, compared to actual size and + compared to our float formula */ + if (MPN_FIB2_SIZE (n) < MPZ_FIB_SIZE_FLOAT (n)) + { + printf ("MPN_FIB2_SIZE wrong at n=%lu\n", n); + printf (" MPN_FIB2_SIZE %ld\n", MPN_FIB2_SIZE (n)); + printf (" MPZ_FIB_SIZE_FLOAT %ld\n", MPZ_FIB_SIZE_FLOAT (n)); + abort (); + } + if (MPN_FIB2_SIZE (n) < SIZ(want_fn)) + { + printf ("MPN_FIB2_SIZE wrong at n=%lu\n", n); + printf (" MPN_FIB2_SIZE %ld\n", MPN_FIB2_SIZE (n)); + printf (" SIZ(want_fn) %d\n", SIZ(want_fn)); + abort (); + } + + mpz_fib2_ui (got_fn, got_fn1, n); + MPZ_CHECK_FORMAT (got_fn); + MPZ_CHECK_FORMAT (got_fn1); + if (mpz_cmp (got_fn, want_fn) != 0 || mpz_cmp (got_fn1, want_fn1) != 0) + { + printf ("mpz_fib2_ui(%lu) wrong\n", n); + mpz_trace ("want fn ", want_fn); + mpz_trace ("got fn ", got_fn); + mpz_trace ("want fn1", want_fn1); + mpz_trace ("got fn1", got_fn1); + abort (); + } + + mpz_fib_ui (got_fn, n); + MPZ_CHECK_FORMAT (got_fn); + if (mpz_cmp (got_fn, want_fn) != 0) + { + printf ("mpz_fib_ui(%lu) wrong\n", n); + mpz_trace ("want fn", want_fn); + mpz_trace ("got fn", got_fn); + abort (); + } + + mpz_add (want_fn1, want_fn1, want_fn); /* F[n+1] = F[n] + F[n-1] */ + mpz_swap (want_fn1, want_fn); + } + + mpz_clear (want_fn); + mpz_clear (want_fn1); + mpz_clear (got_fn); + mpz_clear (got_fn1); + + tests_end (); + exit (0); +} |