Viewing file:  t-trunc.c (6.86 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* Test mpf_trunc, mpf_ceil, mpf_floor.
Copyright 2001, 2002, 2020 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"
void
check_print (mpf_srcptr src, mpf_srcptr got, mpf_srcptr want)
{
mp_trace_base = 16;
mpf_trace ("src ", src);
mpf_trace ("got ", got);
mpf_trace ("want", want);
printf ("got size=%d exp=%ld\n", SIZ(got), EXP(got));
mpn_trace (" limbs=", PTR(got), (mp_size_t) ABSIZ(got));
printf ("want size=%d exp=%ld\n", SIZ(want), EXP(want));
mpn_trace (" limbs=", PTR(want), (mp_size_t) ABSIZ(want));
}
void
check_one (mpf_srcptr src, mpf_srcptr trunc, mpf_srcptr ceil, mpf_srcptr floor)
{
mpf_t got;
mpf_init2 (got, mpf_get_prec (trunc));
ASSERT_ALWAYS (PREC(got) == PREC(trunc));
ASSERT_ALWAYS (PREC(got) == PREC(ceil));
ASSERT_ALWAYS (PREC(got) == PREC(floor));
#define CHECK_SEP(name, fun, want) \
mpf_set_ui (got, 54321L); /* initial junk */ \
fun (got, src); \
MPF_CHECK_FORMAT (got); \
if (mpf_cmp (got, want) != 0) \
{ \
printf ("%s wrong\n", name); \
check_print (src, got, want); \
abort (); \
}
CHECK_SEP ("mpf_trunc", mpf_trunc, trunc);
CHECK_SEP ("mpf_ceil", mpf_ceil, ceil);
CHECK_SEP ("mpf_floor", mpf_floor, floor);
#define CHECK_INPLACE(name, fun, want) \
mpf_set (got, src); \
fun (got, got); \
MPF_CHECK_FORMAT (got); \
if (mpf_cmp (got, want) != 0) \
{ \
printf ("%s wrong\n", name); \
check_print (src, got, want); \
abort (); \
}
CHECK_INPLACE ("mpf_trunc", mpf_trunc, trunc);
/* Can't do these unconditionally in case truncation by mpf_set strips
some low non-zero limbs which would have rounded the result. */
if (mpf_size (src) <= PREC(trunc)+1)
{
CHECK_INPLACE ("mpf_ceil", mpf_ceil, ceil);
CHECK_INPLACE ("mpf_floor", mpf_floor, floor);
}
mpf_clear (got);
}
void
check_all (mpf_ptr src, mpf_ptr trunc, mpf_ptr ceil, mpf_ptr floor)
{
/* some of these values are generated with direct field assignments */
MPF_CHECK_FORMAT (src);
MPF_CHECK_FORMAT (trunc);
MPF_CHECK_FORMAT (ceil);
MPF_CHECK_FORMAT (floor);
check_one (src, trunc, ceil, floor);
mpf_neg (src, src);
mpf_neg (trunc, trunc);
mpf_neg (ceil, ceil);
mpf_neg (floor, floor);
check_one (src, trunc, floor, ceil);
}
void
check_various (void)
{
mpf_t src, trunc, ceil, floor;
int n, i;
mpf_init2 (src, 512L);
mpf_init2 (trunc, 256L);
mpf_init2 (ceil, 256L);
mpf_init2 (floor, 256L);
/* 0 */
mpf_set_ui (src, 0L);
mpf_set_ui (trunc, 0L);
mpf_set_ui (ceil, 0L);
mpf_set_ui (floor, 0L);
check_all (src, trunc, ceil, floor);
/* 1 */
mpf_set_ui (src, 1L);
mpf_set_ui (trunc, 1L);
mpf_set_ui (ceil, 1L);
mpf_set_ui (floor, 1L);
check_all (src, trunc, ceil, floor);
/* 2^1024 */
mpf_set_ui (src, 1L);
mpf_mul_2exp (src, src, 1024L);
mpf_set (trunc, src);
mpf_set (ceil, src);
mpf_set (floor, src);
check_all (src, trunc, ceil, floor);
/* 1/2^1024, fraction only */
mpf_set_ui (src, 1L);
mpf_div_2exp (src, src, 1024L);
mpf_set_si (trunc, 0L);
mpf_set_si (ceil, 1L);
mpf_set_si (floor, 0L);
check_all (src, trunc, ceil, floor);
/* 1/2 */
mpf_set_ui (src, 1L);
mpf_div_2exp (src, src, 1L);
mpf_set_si (trunc, 0L);
mpf_set_si (ceil, 1L);
mpf_set_si (floor, 0L);
check_all (src, trunc, ceil, floor);
/* 123+1/2^64 */
mpf_set_ui (src, 1L);
mpf_div_2exp (src, src, 64L);
mpf_add_ui (src, src, 123L);
mpf_set_si (trunc, 123L);
mpf_set_si (ceil, 124L);
mpf_set_si (floor, 123L);
check_all (src, trunc, ceil, floor);
/* integer of full prec+1 limbs, unchanged */
n = PREC(trunc)+1;
ASSERT_ALWAYS (n <= PREC(src)+1);
EXP(src) = n;
SIZ(src) = n;
for (i = 0; i < SIZ(src); i++)
PTR(src)[i] = i+100;
mpf_set (trunc, src);
mpf_set (ceil, src);
mpf_set (floor, src);
check_all (src, trunc, ceil, floor);
/* full prec+1 limbs, 1 trimmed for integer */
n = PREC(trunc)+1;
ASSERT_ALWAYS (n <= PREC(src)+1);
EXP(src) = n-1;
SIZ(src) = n;
for (i = 0; i < SIZ(src); i++)
PTR(src)[i] = i+200;
EXP(trunc) = n-1;
SIZ(trunc) = n-1;
for (i = 0; i < SIZ(trunc); i++)
PTR(trunc)[i] = i+201;
mpf_set (floor, trunc);
mpf_add_ui (ceil, trunc, 1L);
check_all (src, trunc, ceil, floor);
/* prec+3 limbs, 2 trimmed for size */
n = PREC(trunc)+3;
ASSERT_ALWAYS (n <= PREC(src)+1);
EXP(src) = n;
SIZ(src) = n;
for (i = 0; i < SIZ(src); i++)
PTR(src)[i] = i+300;
EXP(trunc) = n;
SIZ(trunc) = n-2;
for (i = 0; i < SIZ(trunc); i++)
PTR(trunc)[i] = i+302;
mpf_set (floor, trunc);
mpf_set (ceil, trunc);
PTR(ceil)[0]++;
check_all (src, trunc, ceil, floor);
/* prec+4 limbs, 2 trimmed for size, 1 trimmed for integer */
n = PREC(trunc)+4;
ASSERT_ALWAYS (n <= PREC(src)+1);
EXP(src) = n-1;
SIZ(src) = n;
for (i = 0; i < SIZ(src); i++)
PTR(src)[i] = i+400;
EXP(trunc) = n-1;
SIZ(trunc) = n-3;
for (i = 0; i < SIZ(trunc); i++)
PTR(trunc)[i] = i+403;
mpf_set (floor, trunc);
mpf_set (ceil, trunc);
PTR(ceil)[0]++;
check_all (src, trunc, ceil, floor);
/* F.F, carry out of ceil */
EXP(src) = 1;
SIZ(src) = 2;
PTR(src)[0] = GMP_NUMB_MAX;
PTR(src)[1] = GMP_NUMB_MAX;
EXP(trunc) = 1;
SIZ(trunc) = 1;
PTR(trunc)[0] = GMP_NUMB_MAX;
mpf_set (floor, trunc);
EXP(ceil) = 2;
SIZ(ceil) = 1;
PTR(ceil)[0] = 1;
check_all (src, trunc, ceil, floor);
/* FF.F, carry out of ceil */
EXP(src) = 2;
SIZ(src) = 3;
PTR(src)[0] = GMP_NUMB_MAX;
PTR(src)[1] = GMP_NUMB_MAX;
PTR(src)[2] = GMP_NUMB_MAX;
EXP(trunc) = 2;
SIZ(trunc) = 2;
PTR(trunc)[0] = GMP_NUMB_MAX;
PTR(trunc)[1] = GMP_NUMB_MAX;
mpf_set (floor, trunc);
EXP(ceil) = 3;
SIZ(ceil) = 1;
PTR(ceil)[0] = 1;
check_all (src, trunc, ceil, floor);
mpf_clear (src);
mpf_clear (trunc);
mpf_clear (ceil);
mpf_clear (floor);
}
int
main (void)
{
tests_start ();
check_various ();
tests_end ();
exit (0);
}
|
