vasilito
ff4ff35918
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
/* Test mpf_get_d_2exp.
|
|
|
|
Copyright 2002, 2003, 2017, 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"
|
|
|
|
|
|
static void
|
|
check_data (void)
|
|
{
|
|
mpf_t f;
|
|
double got, want;
|
|
long got_exp;
|
|
long exp;
|
|
struct {
|
|
int base;
|
|
int shift;
|
|
} data[] = {
|
|
{-1, 1}, {-3, 2}, {-5, 3}, {-7, 3}, { 1, 1}, { 3, 2}, { 5, 3}, { 7, 3}
|
|
};
|
|
|
|
mpf_init2 (f, 3);
|
|
|
|
got = mpf_get_d_2exp (&got_exp, f);
|
|
if (got != 0 || got_exp != 0)
|
|
{
|
|
printf ("mpf_get_d_2exp wrong on zero\n");
|
|
mpf_trace (" f ", f);
|
|
d_trace (" got ", got);
|
|
printf (" got exp %ld\n", got_exp);
|
|
abort();
|
|
}
|
|
|
|
for (exp = -513; exp <= 513; exp++)
|
|
{
|
|
size_t i;
|
|
for (i = 0; i < numberof (data); i++)
|
|
{
|
|
want = (double) data[i].base / (1 << data[i].shift);
|
|
mpf_set_d (f, want);
|
|
|
|
if (exp >= 0)
|
|
mpf_mul_2exp (f, f, exp);
|
|
else
|
|
mpf_div_2exp (f, f, -exp);
|
|
|
|
got = mpf_get_d_2exp (&got_exp, f);
|
|
if (got != want || got_exp != exp)
|
|
{
|
|
printf ("mpf_get_d_2exp wrong on 2**%ld\n", exp);
|
|
mpf_trace (" f ", f);
|
|
d_trace (" want ", want);
|
|
d_trace (" got ", got);
|
|
printf (" want exp %ld\n", exp);
|
|
printf (" got exp %ld\n", got_exp);
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
mpf_clear (f);
|
|
}
|
|
|
|
/* Check that hardware rounding doesn't make mpf_get_d_2exp return a value
|
|
outside its defined range. */
|
|
static void
|
|
check_round (void)
|
|
{
|
|
static const unsigned long data[] = { 1, 32, 53, 54, 64, 128, 256, 512 };
|
|
mpf_t f;
|
|
double got;
|
|
long got_exp;
|
|
int i, rnd_mode, old_rnd_mode;
|
|
|
|
mpf_init2 (f, 1024L);
|
|
old_rnd_mode = tests_hardware_getround ();
|
|
|
|
for (rnd_mode = 0; rnd_mode < 4; rnd_mode++)
|
|
{
|
|
tests_hardware_setround (rnd_mode);
|
|
|
|
for (i = 0; i < numberof (data); i++)
|
|
{
|
|
mpf_set_ui (f, 1L);
|
|
mpf_mul_2exp (f, f, data[i]);
|
|
mpf_sub_ui (f, f, 1L);
|
|
|
|
got = mpf_get_d_2exp (&got_exp, f);
|
|
if (got < 0.5 || got >= 1.0)
|
|
{
|
|
printf ("mpf_get_d_2exp bad on 2**%lu-1\n", data[i]);
|
|
printf ("result out of range, expect 0.5 <= got < 1.0\n");
|
|
printf (" rnd_mode = %d\n", rnd_mode);
|
|
printf (" data[i] = %lu\n", data[i]);
|
|
mpf_trace (" f ", f);
|
|
d_trace (" got ", got);
|
|
printf (" got exp %ld\n", got_exp);
|
|
abort();
|
|
}
|
|
}
|
|
}
|
|
|
|
mpf_clear (f);
|
|
tests_hardware_setround (old_rnd_mode);
|
|
}
|
|
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
tests_start ();
|
|
mp_trace_base = 16;
|
|
|
|
check_data ();
|
|
check_round ();
|
|
|
|
tests_end ();
|
|
exit (0);
|
|
}
|