diff options
Diffstat (limited to 'mpfr/tests/tpow.c')
| -rw-r--r-- | mpfr/tests/tpow.c | 77 |
1 files changed, 71 insertions, 6 deletions
diff --git a/mpfr/tests/tpow.c b/mpfr/tests/tpow.c index 4bad9b73f..b47dd9697 100644 --- a/mpfr/tests/tpow.c +++ b/mpfr/tests/tpow.c @@ -1,28 +1,31 @@ /* Test file for mpfr_pow and mpfr_pow_ui. -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 "gmp.h" #include "mpfr.h" void check_pow_ui (void); +void check_inexact (mp_prec_t); void check_pow_ui () { @@ -59,8 +62,70 @@ void check_pow_ui () mpfr_clear (b); } -int main () +void +check_inexact (mp_prec_t p) { + mpfr_t x, y, z, t; + unsigned long u; + mp_prec_t q; + int inexact, cmp; + mp_rnd_t rnd; + + mpfr_init2 (x, p); + mpfr_init (y); + mpfr_init (z); + mpfr_init (t); + mpfr_random (x); + u = lrand48() % 2; + for (q=1; q<=p; q++) + for (rnd=0; rnd<4; rnd++) + { + mpfr_set_prec (y, q); + mpfr_set_prec (z, q + 10); + mpfr_set_prec (t, q); + inexact = mpfr_pow_ui (y, x, u, rnd); + cmp = mpfr_pow_ui (z, x, u, rnd); + if (mpfr_can_round (z, q + 10, rnd, rnd, q)) + { + cmp = mpfr_set (t, z, rnd) || cmp; + if (mpfr_cmp (y, t)) + { + fprintf (stderr, "results differ for u=%lu rnd=%s\n", u, + mpfr_print_rnd_mode(rnd)); + printf ("x="); mpfr_print_raw (x); putchar ('\n'); + printf ("y="); mpfr_print_raw (y); putchar ('\n'); + printf ("t="); mpfr_print_raw (t); putchar ('\n'); + printf ("z="); mpfr_print_raw (z); putchar ('\n'); + exit (1); + } + if (((inexact == 0) && (cmp != 0)) || + ((inexact != 0) && (cmp == 0))) + { + fprintf (stderr, "Wrong inexact flag for p=%u, q=%u, rnd=%s\n", + (unsigned) p, (unsigned) q, mpfr_print_rnd_mode (rnd)); + printf ("expected %d, got %d\n", cmp, inexact); + printf ("u=%lu x=", u); mpfr_print_raw (x); putchar ('\n'); + printf ("y="); mpfr_print_raw (y); putchar ('\n'); + exit (1); + } + } + } + + mpfr_clear (x); + mpfr_clear (y); + mpfr_clear (z); + mpfr_clear (t); +} + +int +main (void) +{ + mp_prec_t p; + check_pow_ui (); + + for (p=1; p<100; p++) + check_inexact (p); + return 0; } |