X-Git-Url: https://oss.titaniummirror.com/gitweb/?a=blobdiff_plain;f=gmp%2Ftests%2Fmpf%2Ft-dm2exp.c;fp=gmp%2Ftests%2Fmpf%2Ft-dm2exp.c;h=da43e28ac3b8b7aab4932b232790f0f56df4874a;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=0000000000000000000000000000000000000000;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/gmp/tests/mpf/t-dm2exp.c b/gmp/tests/mpf/t-dm2exp.c new file mode 100644 index 00000000..da43e28a --- /dev/null +++ b/gmp/tests/mpf/t-dm2exp.c @@ -0,0 +1,119 @@ +/* Test mpf_div, mpf_div_2exp, mpf_mul_2exp. + +Copyright 1996, 2000, 2001 Free Software Foundation, Inc. + +This file is part of the GNU MP Library. + +The GNU MP 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 MP 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 MP Library. If not, see http://www.gnu.org/licenses/. */ + +#include +#include + +#include "gmp.h" +#include "gmp-impl.h" +#include "tests.h" + +#ifndef SIZE +#define SIZE 16 +#endif + +int +main (int argc, char **argv) +{ + int reps = 100000; + int i; + mpf_t u, v, w1, w2, w3; + mp_size_t bprec = 100; + mpf_t rerr, limit_rerr; + mp_size_t un; + mp_exp_t ue; + + tests_start (); + + if (argc > 1) + { + reps = strtol (argv[1], 0, 0); + if (argc > 2) + bprec = strtol (argv[2], 0, 0); + } + + mpf_set_default_prec (bprec); + + mpf_init (rerr); + mpf_init (limit_rerr); + + mpf_init (u); + mpf_init (v); + mpf_init (w1); + mpf_init (w2); + mpf_init (w3); + + for (i = 0; i < reps; i++) + { + unsigned long int res_prec; + unsigned long int pow2; + + res_prec = urandom () % (bprec + 100); + mpf_set_prec (w1, res_prec); + mpf_set_prec (w2, res_prec); + mpf_set_prec (w3, res_prec); + + mpf_set_ui (limit_rerr, 1); + mpf_div_2exp (limit_rerr, limit_rerr, res_prec); + + pow2 = urandom () % 0x10000; + mpf_set_ui (v, 1); + mpf_mul_2exp (v, v, pow2); + + un = urandom () % (2 * SIZE) - SIZE; + ue = urandom () % SIZE; + mpf_random2 (u, un, ue); + + mpf_div_2exp (w1, u, pow2); + mpf_div (w2, u, v); + mpf_reldiff (rerr, w1, w2); + if (mpf_cmp (rerr, limit_rerr) > 0) + { + printf ("ERROR in mpf_div or mpf_div_2exp after %d tests\n", i); + printf (" u = "); mpf_dump (u); + printf (" v = "); mpf_dump (v); + printf (" w1 = "); mpf_dump (w1); + printf (" w2 = "); mpf_dump (w2); + abort (); + } + mpf_mul_2exp (w3, w1, pow2); + mpf_reldiff (rerr, u, w3); + if (mpf_cmp (rerr, limit_rerr) > 0) + { + printf ("ERROR in mpf_mul_2exp after %d tests\n", i); + printf (" u = "); mpf_dump (u); + printf (" v = "); mpf_dump (v); + printf (" w1 = "); mpf_dump (w1); + printf (" w3 = "); mpf_dump (w3); + abort (); + } + } + + mpf_clear (rerr); + mpf_clear (limit_rerr); + + mpf_clear (u); + mpf_clear (v); + mpf_clear (w1); + mpf_clear (w2); + mpf_clear (w3); + + tests_end (); + exit (0); +}