/* Test mpf_sub.
Copyright 1996 , 2001 , 2004 , 2014 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"
#ifndef SIZE
#define SIZE
16
#endif
void
check_rand (
int argc,
char **argv)
{
mp_size_t size;
mp_exp_t exp;
int reps =
20000 ;
int i;
mpf_t u, v, w, wref;
mp_size_t bprec =
100 ;
mpf_t rerr, max_rerr, limit_rerr;
if (argc >
1 )
{
reps = strtol (argv[
1 ],
0 ,
0 );
if (argc >
2 )
bprec = strtol (argv[
2 ],
0 ,
0 );
}
mpf_set_default_prec (bprec);
mpf_init_set_ui (limit_rerr,
1 );
mpf_div_2exp (limit_rerr, limit_rerr, bprec);
#if VERBOSE
mpf_dump (limit_rerr);
#endif
mpf_init (rerr);
mpf_init_set_ui (max_rerr,
0 );
mpf_init (u);
mpf_init (v);
mpf_init (w);
mpf_init (wref);
for (i =
0 ; i < reps; i++)
{
size = urandom () % (
2 * SIZE) - SIZE;
exp = urandom () % SIZE;
mpf_random2 (u, size, exp);
size = urandom () % (
2 * SIZE) - SIZE;
exp = urandom () % SIZE;
mpf_random2 (v, size, exp);
if ((urandom () &
1 ) !=
0 )
mpf_add_ui (u, v,
1 );
else if ((urandom () &
1 ) !=
0 )
mpf_sub_ui (u, v,
1 );
mpf_sub (w, u, v);
refmpf_sub (wref, u, v);
mpf_reldiff (rerr, w, wref);
if (mpf_cmp (rerr, max_rerr) >
0 )
{
mpf_set (max_rerr, rerr);
#if VERBOSE
mpf_dump (max_rerr);
#endif
if (mpf_cmp (rerr, limit_rerr) >
0 )
{
printf (
"ERROR after %d tests\n" , i);
printf (
" u = " ); mpf_dump (u);
printf (
" v = " ); mpf_dump (v);
printf (
"wref = " ); mpf_dump (wref);
printf (
" w = " ); mpf_dump (w);
abort ();
}
}
}
mpf_clear (limit_rerr);
mpf_clear (rerr);
mpf_clear (max_rerr);
mpf_clear (u);
mpf_clear (v);
mpf_clear (w);
mpf_clear (wref);
}
#define W GMP_NUMB_MAX
void
check_data (
void )
{
static const struct {
struct {
int exp, size;
mp_limb_t d[
10 ];
} x, y, want;
} data[] = {
{ {
123 ,
2 , {
8 ,
9 } }, {
123 ,
1 , {
9 } }, {
122 ,
1 , {
8 } } },
{ {
1 ,
1 , {
9 } }, {
1 ,
1 , {
8 } }, {
1 ,
1 , {
1 } } },
{ {
1 ,
1 , {
9 } }, {
1 , -
1 , {
6 } }, {
1 ,
1 , {
15 } } },
{ {
1 ,
2 , {
8 ,
9 } }, {
1 ,
1 , {
8 } }, {
1 ,
2 , {
8 ,
1 } } },
{ {
2 ,
2 , {
8 ,
1 } }, {
1 ,
1 , {
9 } }, {
1 ,
1 , { W } } },
{ {
2 ,
2 , {
9 ,
8 } }, {
1 ,
1 , {
9 } }, {
2 ,
1 , {
8 } } },
{ {
2 ,
1 , {
1 } }, {
1 ,
1 , {
1 } }, {
1 ,
1 , { W } } },
{ {
2 ,
1 , {
9 } }, {
1 ,
1 , { W } }, {
2 ,
2 , {
1 ,
8 } } },
{ {
1 ,
2 , { W,
8 } }, {
1 ,
1 , {
9 } }, {
0 , -
1 , {
1 } } },
{ {
1 ,
2 , { W,
7 } }, {
1 ,
1 , {
9 } }, {
1 , -
2 , {
1 ,
1 } } },
{ {
1 ,
2 , {
1 ,
8 } }, {
1 ,
1 , {
9 } }, {
0 , -
1 , { W } } },
{ {
1 ,
2 , {
1 ,
7 } }, {
1 ,
1 , {
9 } }, {
1 , -
2 , { W,
1 } } },
{ {
1 ,
2 , {
0 ,
8 } }, {
1 ,
1 , {
9 } }, {
1 , -
1 , {
1 } } },
{ {
2 ,
3 , {
5 ,
8 ,
1 } }, {
1 ,
1 , {
9 } }, {
1 ,
2 , {
5 , W } } },
{ {
3 ,
1 , {
1 } }, {
1 ,
1 , {
1 } }, {
2 ,
2 , { W, W } } },
{ {
1 ,
6 , { W, W, W, W, W,
8 } }, {
1 ,
1 , {
9 } }, { -
4 , -
1 , {
1 } } },
{ {
5 ,
5 , { W-
6 , W, W, W, W } }, {
6 ,
1 , {
1 } }, {
1 , -
1 , {
7 } } },
/* f - f == 0, various sizes.
These exercise a past problem ( gmp 4 . 1 . 3 and earlier ) where the
result exponent was not zeroed on a zero result like this. */
{ {
0 ,
0 }, {
0 ,
0 }, {
0 ,
0 } },
{ {
99 ,
3 , {
0 ,
0 ,
1 } }, {
99 ,
1 , {
1 } }, {
0 ,
0 } },
{ {
99 ,
3 , {
0 ,
123 ,
456 } }, {
99 ,
2 , {
123 ,
456 } }, {
0 ,
0 } },
{ {
99 ,
3 , {
123 ,
456 ,
789 } }, {
99 ,
3 , {
123 ,
456 ,
789 } }, {
0 ,
0 } },
/* High limbs cancel, leaving just the low limbs of the longer operand.
This exercises a past problem ( gmp 4 . 1 . 3 and earlier ) where high zero
limbs on the remainder were not stripped before truncating to the
destination, causing loss of precision. */
{ {
123 ,
2 , {
8 ,
9 } }, {
123 ,
1 , {
9 } }, {
122 ,
1 , {
8 } } },
{ {
123 ,
3 , {
8 ,
0 ,
9 } }, {
123 ,
1 , {
9 } }, {
121 ,
1 , {
8 } } },
{ {
123 ,
4 , {
8 ,
0 ,
0 ,
9 } }, {
123 ,
1 , {
9 } }, {
120 ,
1 , {
8 } } },
{ {
123 ,
5 , {
8 ,
0 ,
0 ,
0 ,
9 } }, {
123 ,
1 , {
9 } }, {
119 ,
1 , {
8 } } },
{ {
123 ,
6 , {
8 ,
0 ,
0 ,
0 ,
0 ,
9 } }, {
123 ,
1 , {
9 } }, {
118 ,
1 , {
8 } } },
/* { { 123, 6, { 8, 0, 0, 0, 0, 9 } }, { 123, 6, { 9, 0, 0, 0, 0, 8 } }, { 122, 5, { W, W, W, W, W } } }, */
};
mpf_t x, y, got, want;
int i, swap, fail;
fail =
0 ;
mp_trace_base =
16 ;
mpf_init (got);
for (i =
0 ; i < numberof (data); i++)
{
for (swap =
0 ; swap <=
7 ; swap++)
{
PTR(x) = (mp_ptr) data[i].x.d;
SIZ(x) = data[i].x.size;
EXP(x) = data[i].x.exp;
PREC(x) = numberof (data[i].x.d);
MPF_CHECK_FORMAT (x);
PTR(y) = (mp_ptr) data[i].y.d;
SIZ(y) = data[i].y.size;
EXP(y) = data[i].y.exp;
PREC(y) = numberof (data[i].y.d);
MPF_CHECK_FORMAT (y);
PTR(want) = (mp_ptr) data[i].want.d;
SIZ(want) = data[i].want.size;
EXP(want) = data[i].want.exp;
PREC(want) = numberof (data[i].want.d);
MPF_CHECK_FORMAT (want);
if (swap &
4 )
{
mpf_swap (want, y);
}
if ((SIZ (x) ^ SIZ (y)) <
0 )
continue ;
/* It's an addition, not a subtraction (TO BE REMOVED) */
if (swap &
1 )
{
mpf_swap (x, y);
SIZ(want) = - SIZ(want);
}
if (swap &
2 )
{
SIZ(want) = - SIZ(want);
SIZ(x) = - SIZ(x);
SIZ(y) = - SIZ(y);
}
mpf_sub (got, x, y);
/* MPF_CHECK_FORMAT (got); */
if (! refmpf_validate (
"mpf_sub" , got, want))
{
printf (
"check_data() wrong result at data[%d] (operands%s swapped)\n" , i, swap ?
"" :
" not" )
;
mpf_trace ("x " , x);
mpf_trace ("y " , y);
mpf_trace ("got " , got);
mpf_trace ("want" , want);
fail = 1 ;
}
if (SIZ (x) == 1 || SIZ (x) == 0 )
{
if (SIZ (y)) EXP (y) -= EXP (x) - (mp_exp_t) SIZ (x);
if (SIZ (want)) EXP (want) -= EXP (x) - (mp_exp_t) SIZ (x);
EXP (x) = (mp_exp_t) SIZ (x);
if (mpf_fits_uint_p (x))
{
mpf_ui_sub (got, mpf_get_ui (x), y);
if (! refmpf_validate ("mpf_ui_sub" , got, want))
{
printf ("check_data() wrong result at data[%d] (operands%s swapped)\n" , i, swap ? "" : " not" );
mpf_trace ("x " , x);
mpf_trace ("y " , y);
mpf_trace ("got " , got);
mpf_trace ("want" , want);
fail = 1 ;
}
}
}
if (SIZ (y) == 1 || SIZ (y) == 0 )
{
if (SIZ (x)) EXP (x) -= EXP (y) - (mp_exp_t) SIZ (y);
if (SIZ (want)) EXP (want) -= EXP (y) - (mp_exp_t) SIZ (y);
EXP (y) = (mp_exp_t) SIZ (y);
if (mpf_fits_uint_p (x))
{
mpf_sub_ui (got, x, mpf_get_ui (y));
if (! refmpf_validate ("mpf_sub_ui" , got, want))
{
printf ("check_data() wrong result at data[%d] (operands%s swapped)\n" , i, swap ? "" : " not" );
mpf_trace ("x " , x);
mpf_trace ("y " , y);
mpf_trace ("got " , got);
mpf_trace ("want" , want);
fail = 1 ;
}
}
}
}
}
mpf_clear (got);
if (fail)
abort ();
}
int
main (int argc, char **argv)
{
tests_start ();
check_data ();
check_rand (argc, argv);
tests_end ();
exit (0 );
}
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