diff options
author | Thomas Voss <mail@thomasvoss.com> | 2024-06-21 23:36:36 +0200 |
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committer | Thomas Voss <mail@thomasvoss.com> | 2024-06-21 23:42:26 +0200 |
commit | a89a14ef5da44684a16b204e7a70460cc8c4922a (patch) | |
tree | b23b4c6b155977909ef508fdae2f48d33d802813 /vendor/gmp-6.3.0/tests/mpz/t-get_d.c | |
parent | 1db63fcedab0b288820d66e100b1877b1a5a8851 (diff) |
Basic constant folding implementation
Diffstat (limited to 'vendor/gmp-6.3.0/tests/mpz/t-get_d.c')
-rw-r--r-- | vendor/gmp-6.3.0/tests/mpz/t-get_d.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/vendor/gmp-6.3.0/tests/mpz/t-get_d.c b/vendor/gmp-6.3.0/tests/mpz/t-get_d.c new file mode 100644 index 0000000..f4c839f --- /dev/null +++ b/vendor/gmp-6.3.0/tests/mpz/t-get_d.c @@ -0,0 +1,80 @@ +/* Test mpz_get_d. + +Copyright 2002, 2012, 2020 Free Software Foundation, Inc. + +This file is part of the GNU MP Library test suite. + +The GNU MP Library test suite is free software; you can redistribute it +and/or modify it under the terms of the GNU 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 test suite 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 General +Public License for more details. + +You should have received a copy of the GNU General Public License along with +the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */ + +#include <stdio.h> +#include <stdlib.h> +#include "gmp-impl.h" +#include "tests.h" + + +void +check_onebit (void) +{ + int i; + mpz_t z; + double got, want; + /* FIXME: It'd be better to base this on the float format. */ +#if defined (__vax) || defined (__vax__) + int limit = 127 - 1; /* vax fp numbers have limited range */ +#else + int limit = 512; +#endif + + mpz_init (z); + + got = mpz_get_d (z); + if (got != 0) + { + printf ("mpz_get_d wrong on zero\n"); + abort(); + } + + mpz_set_ui (z, 1L); + want = 1.0; + + for (i = 0; i < limit; i++) + { + got = mpz_get_d (z); + + if (got != want) + { + printf ("mpz_get_d wrong on 2**%d\n", i); + mpz_trace (" z ", z); + printf (" want %.20g\n", want); + printf (" got %.20g\n", got); + abort(); + } + + mpz_mul_2exp (z, z, 1L); + want *= 2.0; + } + mpz_clear (z); +} + + +int +main (void) +{ + tests_start (); + + check_onebit (); + + tests_end (); + exit (0); +} |