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Diffstat (limited to 'tests/tlog1p.c')
-rw-r--r-- | tests/tlog1p.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/tests/tlog1p.c b/tests/tlog1p.c new file mode 100644 index 0000000..7c6320e --- /dev/null +++ b/tests/tlog1p.c @@ -0,0 +1,150 @@ +/* Test file for mpfr_log1p. + +Copyright 2001, 2002, 2003, 2004, 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. */ + +#include <stdio.h> +#include <stdlib.h> + +#include "mpfr-test.h" + +#ifdef CHECK_EXTERNAL +static int +test_log1p (mpfr_ptr a, mpfr_srcptr b, mpfr_rnd_t rnd_mode) +{ + int res; + int ok = rnd_mode == MPFR_RNDN && mpfr_number_p (b) && mpfr_get_prec (a)>=53; + if (ok) + { + mpfr_print_raw (b); + } + res = mpfr_log1p (a, b, rnd_mode); + if (ok) + { + printf (" "); + mpfr_print_raw (a); + printf ("\n"); + } + return res; +} +#else +#define test_log1p mpfr_log1p +#endif + +#define TEST_FUNCTION test_log1p +#define TEST_RANDOM_EMAX 80 +#include "tgeneric.c" + +static void +special (void) +{ + mpfr_t x; + int inex; + + mpfr_init (x); + + mpfr_set_nan (x); + mpfr_clear_flags (); + inex = test_log1p (x, x, MPFR_RNDN); + MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0); + MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN); + + mpfr_set_inf (x, -1); + mpfr_clear_flags (); + inex = test_log1p (x, x, MPFR_RNDN); + MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0); + MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN); + + mpfr_set_inf (x, 1); + mpfr_clear_flags (); + inex = test_log1p (x, x, MPFR_RNDN); + MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) > 0 && inex == 0); + MPFR_ASSERTN (__gmpfr_flags == 0); + + mpfr_set_ui (x, 0, MPFR_RNDN); + mpfr_clear_flags (); + inex = test_log1p (x, x, MPFR_RNDN); + MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS (x) && inex == 0); + MPFR_ASSERTN (__gmpfr_flags == 0); + mpfr_neg (x, x, MPFR_RNDN); + mpfr_clear_flags (); + inex = test_log1p (x, x, MPFR_RNDN); + MPFR_ASSERTN (mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_NEG (x) && inex == 0); + MPFR_ASSERTN (__gmpfr_flags == 0); + + mpfr_set_si (x, -1, MPFR_RNDN); + mpfr_clear_flags (); + inex = test_log1p (x, x, MPFR_RNDN); + MPFR_ASSERTN (mpfr_inf_p (x) && mpfr_sgn (x) < 0 && inex == 0); + MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_DIVBY0); + + mpfr_set_si (x, -2, MPFR_RNDN); + mpfr_clear_flags (); + inex = test_log1p (x, x, MPFR_RNDN); + MPFR_ASSERTN (mpfr_nan_p (x) && inex == 0); + MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN); + + mpfr_clear (x); +} + +static void +other (void) +{ + mpfr_t x, y; + + /* Bug reported by Guillaume Melquiond on 2006-08-14. */ + mpfr_init2 (x, 53); + mpfr_set_str (x, "-1.5e4f72873ed9a@-100", 16, MPFR_RNDN); + mpfr_init2 (y, 57); + mpfr_log1p (y, x, MPFR_RNDU); + if (mpfr_cmp (x, y) != 0) + { + printf ("Error in tlog1p for x = "); + mpfr_out_str (stdout, 16, 0, x, MPFR_RNDN); + printf (", rnd = MPFR_RNDU\nExpected "); + mpfr_out_str (stdout, 16, 15, x, MPFR_RNDN); + printf ("\nGot "); + mpfr_out_str (stdout, 16, 15, y, MPFR_RNDN); + printf ("\n"); + exit (1); + } + + mpfr_clear (y); + mpfr_clear (x); + return; +} + +int +main (int argc, char *argv[]) +{ + tests_start_mpfr (); + + special (); + other (); + + test_generic (2, 100, 50); + + data_check ("data/log1p", mpfr_log1p, "mpfr_log1p"); + bad_cases (mpfr_log1p, mpfr_expm1, "mpfr_log1p", 256, -64, 40, + 4, 128, 800, 40); + + tests_end_mpfr (); + return 0; +} |