129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
/* Test mpz_set_f.
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Copyright 2001 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <stdio.h>
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#include <stdlib.h>
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#include "gmp.h"
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#include "gmp-impl.h"
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#include "tests.h"
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void
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check_one (mpz_srcptr z)
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{
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static const int shift[] = {
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0, 1, BITS_PER_MP_LIMB, 2*BITS_PER_MP_LIMB, 5*BITS_PER_MP_LIMB
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};
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int sh, shneg, neg;
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mpf_t f;
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mpz_t got, want;
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mpf_init2 (f, mpz_sizeinbase(z,2));
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mpz_init (got);
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mpz_init (want);
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for (sh = 0; sh < numberof(shift); sh++)
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{
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for (shneg = 0; shneg <= 1; shneg++)
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{
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for (neg = 0; neg <= 1; neg++)
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{
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mpf_set_z (f, z);
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mpz_set (want, z);
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if (neg)
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{
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mpf_neg (f, f);
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mpz_neg (want, want);
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}
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if (shneg)
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{
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mpz_tdiv_q_2exp (want, want, shift[sh]);
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mpf_div_2exp (f, f, shift[sh]);
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}
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else
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{
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mpz_mul_2exp (want, want, shift[sh]);
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mpf_mul_2exp (f, f, shift[sh]);
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}
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mpz_set_f (got, f);
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MPZ_CHECK_FORMAT (got);
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if (mpz_cmp (got, want) != 0)
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{
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printf ("wrong result\n");
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printf (" shift %d\n", shneg ? -shift[sh] : shift[sh]);
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printf (" neg %d\n", neg);
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mpf_trace (" f", f);
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mpz_trace (" got", got);
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mpz_trace (" want", want);
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abort ();
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}
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}
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}
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}
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mpf_clear (f);
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mpz_clear (got);
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mpz_clear (want);
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}
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void
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check_various (void)
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{
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mpz_t z;
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mpz_init (z);
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mpz_set_ui (z, 0L);
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check_one (z);
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mpz_set_si (z, 123L);
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check_one (z);
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mpz_rrandomb (z, RANDS, 2*BITS_PER_MP_LIMB);
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check_one (z);
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mpz_rrandomb (z, RANDS, 5*BITS_PER_MP_LIMB);
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check_one (z);
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mpz_clear (z);
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}
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int
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main (int argc, char *argv[])
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{
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#if GMP_NAIL_BITS == 0
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tests_start ();
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mp_trace_base = 16;
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check_various ();
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tests_end ();
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#endif
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exit (0);
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}
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