t-mul_ui.c
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上传日期:2022-08-06
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- /* Exercise mpf_mul_ui.
- Copyright 2004 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 <stdio.h>
- #include <stdlib.h>
- #include "gmp.h"
- #include "gmp-impl.h"
- #include "tests.h"
- void
- check_one (const char *desc, mpf_ptr got, mpf_srcptr u, unsigned long v)
- {
- mp_size_t usize, usign;
- mp_ptr wp;
- mpf_t want;
- MPF_CHECK_FORMAT (got);
- /* this code not nailified yet */
- ASSERT_ALWAYS (BITS_PER_ULONG <= GMP_NUMB_BITS);
- usign = SIZ (u);
- usize = ABS (usign);
- wp = refmpn_malloc_limbs (usize + 1);
- wp[usize] = mpn_mul_1 (wp, PTR(u), usize, (mp_limb_t) v);
- PTR(want) = wp;
- SIZ(want) = (usign >= 0 ? usize+1 : -(usize+1));
- EXP(want) = EXP(u) + 1;
- refmpf_normalize (want);
- if (! refmpf_validate ("mpf_mul_ui", got, want))
- {
- mp_trace_base = -16;
- printf (" %sn", desc);
- mpf_trace (" u", u);
- printf (" v %ld 0x%lXn", v, v);
- abort ();
- }
- free (wp);
- }
- void
- check_rand (void)
- {
- unsigned long min_prec = __GMPF_BITS_TO_PREC (1);
- gmp_randstate_ptr rands = RANDS;
- mpf_t got, u;
- unsigned long prec, v;
- int i;
- /* The nails code in mpf_mul_ui currently isn't exact, so suppress these
- tests for now. */
- if (BITS_PER_ULONG > GMP_NUMB_BITS)
- return;
- mpf_init (got);
- mpf_init (u);
- for (i = 0; i < 200; i++)
- {
- /* got precision */
- prec = min_prec + gmp_urandomm_ui (rands, 15L);
- refmpf_set_prec_limbs (got, prec);
- /* u precision */
- prec = min_prec + gmp_urandomm_ui (rands, 15L);
- refmpf_set_prec_limbs (u, prec);
- /* u, possibly negative */
- mpf_random2 (u, PREC(u), (mp_exp_t) 20);
- if (gmp_urandomb_ui (rands, 1L))
- mpf_neg (u, u);
- /* v, 0 to BITS_PER_ULONG bits (inclusive) */
- prec = gmp_urandomm_ui (rands, BITS_PER_ULONG+1);
- v = gmp_urandomb_ui (rands, prec);
- if ((i % 2) == 0)
- {
- /* separate */
- mpf_mul_ui (got, u, v);
- check_one ("separate", got, u, v);
- }
- else
- {
- /* overlap */
- prec = refmpf_set_overlap (got, u);
- mpf_mul_ui (got, got, v);
- check_one ("overlap src==dst", got, u, v);
- mpf_set_prec_raw (got, prec);
- }
- }
- mpf_clear (got);
- mpf_clear (u);
- }
- void
- check_various (void)
- {
- mpf_t u, got, want;
- char *s;
- mpf_init2 (u, 2*8*sizeof(long));
- mpf_init2 (got, 2*8*sizeof(long));
- mpf_init2 (want, 2*8*sizeof(long));
- s = "0 * ULONG_MAX";
- mpf_set_ui (u, 0L);
- mpf_mul_ui (got, u, ULONG_MAX);
- MPF_CHECK_FORMAT (got);
- mpf_set_ui (want, 0L);
- if (mpf_cmp (got, want) != 0)
- {
- error:
- printf ("Wrong result from %sn", s);
- mpf_trace ("u ", u);
- mpf_trace ("got ", got);
- mpf_trace ("want", want);
- abort ();
- }
- s = "1 * ULONG_MAX";
- mpf_set_ui (u, 1L);
- mpf_mul_ui (got, u, ULONG_MAX);
- MPF_CHECK_FORMAT (got);
- mpf_set_ui (want, ULONG_MAX);
- if (mpf_cmp (got, want) != 0)
- goto error;
- mpf_clear (u);
- mpf_clear (got);
- mpf_clear (want);
- }
- int
- main (void)
- {
- tests_start ();
- check_various ();
- check_rand ();
- tests_end ();
- exit (0);
- }