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Diffstat (limited to 'tests/tgeneric_ui.c')
| -rw-r--r-- | tests/tgeneric_ui.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/tests/tgeneric_ui.c b/tests/tgeneric_ui.c new file mode 100644 index 0000000..22b6170 --- /dev/null +++ b/tests/tgeneric_ui.c @@ -0,0 +1,130 @@ +/* Generic test file for functions with one mpfr_t argument and an integer. + +Copyright 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. +Contributed by the AriC and Caramel projects, INRIA. + +This file is part of the GNU MPFR Library. + +The GNU MPFR Library is free software; you can redistribute it and/or modify +it under the terms of the GNU Lesser 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 MPFR Library 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 Lesser General Public +License for more details. + +You should have received a copy of the GNU Lesser General Public License +along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see +http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., +51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ + +/* define INTEGER_TYPE to what we want */ +#ifndef INTEGER_TYPE +# define INTEGER_TYPE mp_limb_t +#endif +#ifndef RAND_FUNCTION +# define RAND_FUNCTION(x) mpfr_urandomb ((x), RANDS) +#endif +#ifndef INT_RAND_FUNCTION +# define INT_RAND_FUNCTION() (INTEGER_TYPE) randlimb () +#endif + +static void +test_generic_ui (mpfr_prec_t p0, mpfr_prec_t p1, unsigned int N) +{ + mpfr_prec_t prec, yprec; + mpfr_t x, y, z, t; + INTEGER_TYPE u; + mpfr_rnd_t rnd; + int inexact, compare, compare2; + unsigned int n; + + mpfr_init (x); + mpfr_init (y); + mpfr_init (z); + mpfr_init (t); + + /* generic test */ + for (prec = p0; prec <= p1; prec++) + { + mpfr_set_prec (x, prec); + mpfr_set_prec (z, prec); + mpfr_set_prec (t, prec); + yprec = prec + 10; + + for (n = 0; n <= N; n++) + { + if (n > 1 || prec < p1) + RAND_FUNCTION (x); + else + { + /* Special cases tested in precision p1 if n <= 1. */ + mpfr_set_si (x, n == 0 ? 1 : -1, MPFR_RNDN); + mpfr_set_exp (x, mpfr_get_emin ()); + } + u = INT_RAND_FUNCTION (); + rnd = RND_RAND (); + mpfr_set_prec (y, yprec); + compare = TEST_FUNCTION (y, x, u, rnd); + if (mpfr_can_round (y, yprec, rnd, rnd, prec)) + { + mpfr_set (t, y, rnd); + inexact = TEST_FUNCTION (z, x, u, rnd); + if (mpfr_cmp (t, z)) + { + printf ("results differ for x="); + mpfr_out_str (stdout, 2, prec, x, MPFR_RNDN); + printf ("\nu=%lu", (unsigned long) u); + printf (" prec=%lu rnd_mode=%s\n", + (unsigned long ) prec, mpfr_print_rnd_mode (rnd)); +#ifdef TEST_FUNCTION_NAME + printf ("Function: %s\n", TEST_FUNCTION_NAME); +#endif + printf ("got "); + mpfr_out_str (stdout, 2, prec, z, MPFR_RNDN); + puts (""); + printf ("expected "); + mpfr_out_str (stdout, 2, prec, t, MPFR_RNDN); + puts (""); + printf ("approx "); + mpfr_print_binary (y); + puts (""); + exit (1); + } + compare2 = mpfr_cmp (t, y); + /* if rounding to nearest, cannot know the sign of t - f(x) + because of composed rounding: y = o(f(x)) and t = o(y) */ + if (compare * compare2 >= 0) + compare = compare + compare2; + else + compare = inexact; /* cannot determine sign(t-f(x)) */ + if (((inexact == 0) && (compare != 0)) || + ((inexact > 0) && (compare <= 0)) || + ((inexact < 0) && (compare >= 0))) + { + printf ("Wrong inexact flag for rnd=%s: expected %d, got %d" + "\n", mpfr_print_rnd_mode (rnd), compare, inexact); + printf ("x="); mpfr_print_binary (x); puts (""); + printf ("u=%lu", (unsigned long) u); + printf ("y="); mpfr_print_binary (y); puts (""); + printf ("t="); mpfr_print_binary (t); puts (""); + exit (1); + } + } + } + } + + mpfr_clear (x); + mpfr_clear (y); + mpfr_clear (z); + mpfr_clear (t); +} + +#undef RAND_FUNCTION +#undef INTEGER_TYPE +#undef TEST_FUNCTION +#undef TEST_FUNCTION_NAME +#undef test_generic_ui +#undef INT_RAND_FUNCTION |