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author | Kevin Ryde <user42@zip.com.au> | 2000-09-05 23:28:08 +0200 |
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committer | Kevin Ryde <user42@zip.com.au> | 2000-09-05 23:28:08 +0200 |
commit | a5d6412e9ba237e8cde5f032ff71e148807dd8f0 (patch) | |
tree | b7305f1804ed9bdd698192632660effa53072069 /tests/t-modlinv.c | |
parent | fb94e79fe7843e484a8f2e6a106f296396c05944 (diff) | |
download | gmp-a5d6412e9ba237e8cde5f032ff71e148807dd8f0.tar.gz |
* tests/t-modlinv.c: New file.
Diffstat (limited to 'tests/t-modlinv.c')
-rw-r--r-- | tests/t-modlinv.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/tests/t-modlinv.c b/tests/t-modlinv.c new file mode 100644 index 000000000..a5458286a --- /dev/null +++ b/tests/t-modlinv.c @@ -0,0 +1,79 @@ +/* Test modlimb_invert. */ + +/* +Copyright (C) 2000 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 2.1 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; 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 "gmp.h" +#include "gmp-impl.h" +#include "longlong.h" +#include "urandom.h" + + +void +one (mp_limb_t n) +{ + mp_limb_t inv, prod; + + modlimb_invert (inv, n); + prod = inv * n; + if (prod != 1) + { + printf ("modlimb_invert wrong on n=0x%lX, got 0x%lX, product 0x%lX\n", + n, inv, prod); + abort (); + } +} + +void +some (void) +{ + int i; + for (i = 0; i < 10000; i++) + one (urandom () | 1); +} + +void +all (void) +{ + mp_limb_t n; + + n = 1; + do { + one (n); + n += 2; + } while (n != 1); +} + + +int +main (int argc, char *argv[]) +{ + if (argc >= 2 && strcmp (argv[1], "-a") == 0) + { + /* it's feasible to run all values on a 32-bit limb, but not a 64-bit */ + all (); + exit (0); + } + + some (); + exit (0); +} |