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/* 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);
}
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