122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
/* Test mpn_divrem_1 and mpn_preinv_divrem_1.
|
|
|
|
Copyright 2003 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., 51 Franklin Street, Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "mpir.h"
|
|
#include "gmp-impl.h"
|
|
#include "tests.h"
|
|
|
|
|
|
void
|
|
check_data (void)
|
|
{
|
|
static const struct {
|
|
mp_limb_t n[1];
|
|
mp_size_t nsize;
|
|
mp_limb_t d;
|
|
mp_size_t qxn;
|
|
mp_limb_t want_q[5];
|
|
mp_limb_t want_r;
|
|
} data[] = {
|
|
{ { 0 }, 1, 1, 0,
|
|
{ 0 }, 0},
|
|
|
|
{ { 5 }, 1, 2, 0,
|
|
{ 2 }, 1},
|
|
|
|
#if GMP_NUMB_BITS == 32
|
|
{ { 0x3C }, 1, 0xF2, 1,
|
|
{ 0x3F789854, 0 }, 0x98 },
|
|
#endif
|
|
|
|
#if GMP_NUMB_BITS == 64
|
|
{ { 0x3C }, 1, 0xF2, 1,
|
|
{ CNST_LIMB(0x3F789854A0CB1B81), 0 }, 0x0E },
|
|
|
|
/* This case exposed some wrong code generated by SGI cc on mips64 irix
|
|
6.5 with -n32 -O2, in the fractional loop for normalized divisor
|
|
using udiv_qrnnd_preinv. A test "x>al" in one of the sub_ddmmss
|
|
expansions came out wrong, leading to an incorrect quotient. */
|
|
{ { CNST_LIMB(0x3C00000000000000) }, 1, CNST_LIMB(0xF200000000000000), 1,
|
|
{ CNST_LIMB(0x3F789854A0CB1B81), 0 }, CNST_LIMB(0x0E00000000000000) },
|
|
#endif
|
|
};
|
|
|
|
mp_limb_t dinv, got_r, got_q[numberof(data[0].want_q)];
|
|
mp_size_t qsize;
|
|
int i, shift;
|
|
|
|
for (i = 0; i < numberof (data); i++)
|
|
{
|
|
qsize = data[i].nsize + data[i].qxn;
|
|
ASSERT_ALWAYS (qsize <= numberof (got_q));
|
|
|
|
got_r = mpn_divrem_1 (got_q, data[i].qxn, data[i].n, data[i].nsize,
|
|
data[i].d);
|
|
if (got_r != data[i].want_r
|
|
|| refmpn_cmp (got_q, data[i].want_q, qsize) != 0)
|
|
{
|
|
printf ("mpn_divrem_1 wrong at data[%d]\n", i);
|
|
bad:
|
|
mpn_trace (" n", data[i].n, data[i].nsize);
|
|
printf (" nsize=%ld\n", (long) data[i].nsize);
|
|
mp_limb_trace (" d", data[i].d);
|
|
printf (" qxn=%ld\n", (long) data[i].qxn);
|
|
mpn_trace (" want q", data[i].want_q, qsize);
|
|
mpn_trace (" got q", got_q, qsize);
|
|
mp_limb_trace (" want r", data[i].want_r);
|
|
mp_limb_trace (" got r", got_r);
|
|
abort ();
|
|
}
|
|
|
|
/* test if available */
|
|
#if USE_PREINV_DIVREM_1 || HAVE_NATIVE_mpn_preinv_divrem_1
|
|
shift = refmpn_count_leading_zeros (data[i].d);
|
|
dinv = refmpn_invert_limb (data[i].d << shift);
|
|
got_r = mpn_preinv_divrem_1 (got_q, data[i].qxn,
|
|
data[i].n, data[i].nsize,
|
|
data[i].d, dinv, shift);
|
|
if (got_r != data[i].want_r
|
|
|| refmpn_cmp (got_q, data[i].want_q, qsize) != 0)
|
|
{
|
|
printf ("mpn_preinv_divrem_1 wrong at data[%d]\n", i);
|
|
printf (" shift=%d\n", shift);
|
|
mp_limb_trace (" dinv", dinv);
|
|
goto bad;
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
tests_start ();
|
|
mp_trace_base = -16;
|
|
|
|
check_data ();
|
|
|
|
tests_end ();
|
|
exit (0);
|
|
}
|