diff options
Diffstat (limited to 'mpfr/tests/tset_q.c')
| -rw-r--r-- | mpfr/tests/tset_q.c | 72 |
1 files changed, 51 insertions, 21 deletions
diff --git a/mpfr/tests/tset_q.c b/mpfr/tests/tset_q.c index d833378cd..9807c6ea8 100644 --- a/mpfr/tests/tset_q.c +++ b/mpfr/tests/tset_q.c @@ -1,24 +1,25 @@ /* Test file for mpfr_set_q. -Copyright (C) 2000 Free Software Foundation. +Copyright (C) 2000, 2001 Free Software Foundation, Inc. This file is part of the MPFR Library. The MPFR Library is free software; you can redistribute it and/or modify -it under the terms of the GNU Library General Public License as published by -the Free Software Foundation; either version 2 of the License, or (at your +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The 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 Library General Public +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 Library General Public License +You should have received a copy of the GNU Lesser General Public License along with the MPFR Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include "gmp.h" @@ -26,29 +27,57 @@ MA 02111-1307, USA. */ void check _PROTO((long int, long int, mp_rnd_t, double)); -void check(long int n, long int d, mp_rnd_t rnd, double y) +void +check (long int n, long int d, mp_rnd_t rnd, double y) { - mpq_t q; mpfr_t x; double z; + mpq_t q; + mpfr_t x, t; + double z; + int inexact, compare; - mpfr_init2(x, 53); mpq_init(q); - mpq_set_si(q, n, d); + mpfr_init2 (x, 53); + mpfr_init2 (t, mpfr_get_prec (x) + mp_bits_per_limb); + mpq_init (q); + mpq_set_si (q, n, d); #ifdef TEST - mpfr_set_machine_rnd_mode(rnd); + mpfr_set_machine_rnd_mode (rnd); y = (double) n / d; #endif - mpfr_set_q(x, q, rnd); - z = mpfr_get_d(x); - if (y != z) { - fprintf(stderr, "Error for q=%ld/%lu and rnd=%s\n", n, d, - mpfr_print_rnd_mode(rnd)); - fprintf(stderr, "libm.a gives %1.20e, mpfr_set_q gives %1.20e\n", - y, z); - exit(1); - } - mpfr_clear(x); mpq_clear(q); + inexact = mpfr_set_q (x, q, rnd); + z = mpfr_get_d (x); + + /* check values */ + if (y != z) + { + fprintf (stderr, "Error for q=%ld/%lu and rnd=%s\n", n, d, + mpfr_print_rnd_mode (rnd)); + fprintf (stderr, "libm.a gives %1.20e, mpfr_set_q gives %1.20e\n", y, z); + exit (1); + } + + /* check inexact flag */ + if (mpfr_mul_ui (t, x, (d < 0) ? (-d) : d, rnd)) + { + fprintf (stderr, "t <- x * d should be exact\n"); + exit (1); + } + compare = mpfr_cmp_si (t, n); + if (((inexact == 0) && (compare != 0)) || + ((inexact < 0) && (compare >= 0)) || + ((inexact > 0) && (compare <= 0))) + { + fprintf (stderr, "wrong inexact flag: expected %d, got %d\n", compare, + inexact); + exit (1); + } + + mpfr_clear (x); + mpfr_clear (t); + mpq_clear (q); } -int main() +int +main (void) { #ifdef TEST long int i, n; @@ -74,5 +103,6 @@ int main() check(75504803, 400207282, GMP_RNDU, 1.8866424074712365155e-1); check(643562308, 23100894, GMP_RNDD, 2.7858762002890447462e1); check(632549085, 1831935802, GMP_RNDN, 3.4528998467600230393e-1); + return 0; } |