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/*=============================================================================
This file is part of ARB.
ARB 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 2 of the License, or
(at your option) any later version.
ARB 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 ARB; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2012 Fredrik Johansson
******************************************************************************/
#include "arf.h"
#include "flint/ulong_extras.h"
int
arf_sub_ui_naive(arf_t z, const arf_t x, ulong y, slong prec, arf_rnd_t rnd)
{
arf_t t;
int r;
arf_init(t);
arf_set_ui(t, y);
r = arf_sub(z, x, t, prec, rnd);
arf_clear(t);
return r;
}
int main()
{
slong iter, iter2;
flint_rand_t state;
flint_printf("sub_ui....");
fflush(stdout);
flint_randinit(state);
for (iter = 0; iter < 10000; iter++)
{
arf_t x, z, v;
ulong y;
slong prec, r1, r2;
arf_rnd_t rnd;
arf_init(x);
arf_init(z);
arf_init(v);
for (iter2 = 0; iter2 < 100; iter2++)
{
arf_randtest_special(x, state, 2000, 10);
y = n_randtest(state);
prec = 2 + n_randint(state, 2000);
if (n_randint(state, 10) == 0 && fmpz_bits(ARF_EXPREF(x)) < 10)
{
prec = ARF_PREC_EXACT;
}
switch (n_randint(state, 4))
{
case 0: rnd = ARF_RND_DOWN; break;
case 1: rnd = ARF_RND_UP; break;
case 2: rnd = ARF_RND_FLOOR; break;
default: rnd = ARF_RND_CEIL; break;
}
switch (n_randint(state, 2))
{
case 0:
r1 = arf_sub_ui(z, x, y, prec, rnd);
r2 = arf_sub_ui_naive(v, x, y, prec, rnd);
if (!arf_equal(z, v) || r1 != r2)
{
flint_printf("FAIL!\n");
flint_printf("prec = %wd, rnd = %d\n\n", prec, rnd);
flint_printf("x = "); arf_print(x); flint_printf("\n\n");
flint_printf("y = "); flint_printf("%wd", y); flint_printf("\n\n");
flint_printf("z = "); arf_print(z); flint_printf("\n\n");
flint_printf("v = "); arf_print(v); flint_printf("\n\n");
flint_printf("r1 = %wd, r2 = %wd\n", r1, r2);
abort();
}
break;
default:
r2 = arf_sub_ui_naive(v, x, y, prec, rnd);
r1 = arf_sub_ui(x, x, y, prec, rnd);
if (!arf_equal(x, v) || r1 != r2)
{
flint_printf("FAIL (aliasing)!\n");
flint_printf("prec = %wd, rnd = %d\n\n", prec, rnd);
flint_printf("x = "); arf_print(x); flint_printf("\n\n");
flint_printf("y = "); flint_printf("%wd", y); flint_printf("\n\n");
flint_printf("v = "); arf_print(v); flint_printf("\n\n");
flint_printf("r1 = %wd, r2 = %wd\n", r1, r2);
abort();
}
break;
}
}
arf_clear(x);
arf_clear(z);
arf_clear(v);
}
flint_randclear(state);
flint_cleanup();
flint_printf("PASS\n");
return EXIT_SUCCESS;
}
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