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/* Test mpz_limbs_* functions
Copyright 2013 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 <stdlib.h>
#include <stdio.h>
#include "gmp-impl.h"
#include "tests.h"
#define COUNT 100
#define BITSIZE 500
/* Like mpz_add. For simplicity, support positive inputs only. */
static void
alt_add (mpz_ptr r, mpz_srcptr a, mpz_srcptr b)
{
mp_size_t an = mpz_size (a);
mp_size_t bn = mpz_size (b);
mp_ptr rp;
ASSERT (an > 0);
ASSERT (bn > 0);
if (an < bn)
{
MP_SIZE_T_SWAP (an, bn);
MPZ_SRCPTR_SWAP (a, b);
}
rp = mpz_limbs_modify (r, an + 1);
rp[an] = mpn_add (rp, mpz_limbs_read (a), an, mpz_limbs_read (b), bn);
mpz_limbs_finish (r, an + 1);
}
static void
check_funcs (const char *name,
void (*f)(mpz_ptr, mpz_srcptr, mpz_srcptr),
void (*ref_f)(mpz_ptr, mpz_srcptr, mpz_srcptr),
mpz_srcptr a, mpz_srcptr b)
{
mpz_t r, ref;
mpz_inits (r, ref, NULL);
ref_f (ref, a, b);
MPZ_CHECK_FORMAT (ref);
f (r, a, b);
MPZ_CHECK_FORMAT (r);
if (mpz_cmp (r, ref) != 0)
{
printf ("%s failed, abits %u, bbits %u\n",
name,
(unsigned) mpz_sizeinbase (a, 2),
(unsigned) mpz_sizeinbase (b, 2));
gmp_printf ("a = %Zx\n", a);
gmp_printf ("b = %Zx\n", b);
gmp_printf ("r = %Zx (bad)\n", r);
gmp_printf ("ref = %Zx\n", ref);
abort ();
}
mpz_clears (r, ref, NULL);
}
static void
check_add (void)
{
gmp_randstate_ptr rands = RANDS;
mpz_t bs, a, b;
unsigned i;
mpz_inits (bs, a, b, NULL);
for (i = 0; i < COUNT; i++)
{
mpz_urandomb (bs, rands, 32);
mpz_rrandomb (a, rands, 1 + mpz_get_ui (bs) % BITSIZE);
mpz_urandomb (bs, rands, 32);
mpz_rrandomb (b, rands, 1 + mpz_get_ui (bs) % BITSIZE);
check_funcs ("add", alt_add, mpz_add, a, b);
}
mpz_clears (bs, a, b, NULL);
}
static void
alt_mul (mpz_ptr r, mpz_srcptr a, mpz_srcptr b)
{
mp_size_t an = mpz_size (a);
mp_size_t bn = mpz_size (b);
mp_srcptr ap, bp;
TMP_DECL;
TMP_MARK;
ASSERT (an > 0);
ASSERT (bn > 0);
if (an < bn)
{
MP_SIZE_T_SWAP (an, bn);
MPZ_SRCPTR_SWAP (a, b);
}
/* NOTE: This copying seems unnecessary; better to allocate new
result area, and free the old area when done. */
if (r == a)
{
mp_ptr tp = TMP_ALLOC_LIMBS (an);
MPN_COPY (tp, mpz_limbs_read (a), an);
ap = tp;
bp = (a == b) ? ap : mpz_limbs_read (b);
}
else if (r == b)
{
mp_ptr tp = TMP_ALLOC_LIMBS (bn);
MPN_COPY (tp, mpz_limbs_read (b), bn);
bp = tp;
ap = mpz_limbs_read (a);
}
else
{
ap = mpz_limbs_read (a);
bp = mpz_limbs_read (b);
}
mpn_mul (mpz_limbs_write (r, an + bn),
ap, an, bp, bn);
mpz_limbs_finish (r, an + bn);
}
void
check_mul (void)
{
gmp_randstate_ptr rands = RANDS;
mpz_t bs, a, b;
unsigned i;
mpz_inits (bs, a, b, NULL);
for (i = 0; i < COUNT; i++)
{
mpz_urandomb (bs, rands, 32);
mpz_rrandomb (a, rands, 1 + mpz_get_ui (bs) % BITSIZE);
mpz_urandomb (bs, rands, 32);
mpz_rrandomb (b, rands, 1 + mpz_get_ui (bs) % BITSIZE);
check_funcs ("mul", alt_mul, mpz_mul, a, b);
}
mpz_clears (bs, a, b, NULL);
}
#define MAX_SIZE 100
static void
check_roinit (void)
{
gmp_randstate_ptr rands = RANDS;
mpz_t bs, a, b, r, ref;
unsigned i;
mpz_inits (bs, a, b, r, ref, NULL);
for (i = 0; i < COUNT; i++)
{
mp_srcptr ap, bp;
mp_size_t an, bn;
mpz_urandomb (bs, rands, 32);
mpz_rrandomb (a, rands, 1 + mpz_get_ui (bs) % BITSIZE);
mpz_urandomb (bs, rands, 32);
mpz_rrandomb (b, rands, 1 + mpz_get_ui (bs) % BITSIZE);
an = mpz_size (a);
ap = mpz_limbs_read (a);
bn = mpz_size (b);
bp = mpz_limbs_read (b);
mpz_add (ref, a, b);
{
mpz_t a1, b1;
#if __STDC_VERSION__ >= 199901
const mpz_t a2 = MPZ_ROINIT_N ( (mp_ptr) ap, an);
const mpz_t b2 = MPZ_ROINIT_N ( (mp_ptr) bp, bn);
mpz_set_ui (r, 0);
mpz_add (r, a2, b2);
if (mpz_cmp (r, ref) != 0)
{
printf ("MPZ_ROINIT_N failed\n");
gmp_printf ("a = %Zx\n", a);
gmp_printf ("b = %Zx\n", b);
gmp_printf ("r = %Zx (bad)\n", r);
gmp_printf ("ref = %Zx\n", ref);
abort ();
}
#endif
mpz_set_ui (r, 0);
mpz_add (r, mpz_roinit_n (a1, ap, an), mpz_roinit_n (b1, bp, bn));
if (mpz_cmp (r, ref) != 0)
{
printf ("mpz_roinit_n failed\n");
gmp_printf ("a = %Zx\n", a);
gmp_printf ("b = %Zx\n", b);
gmp_printf ("r = %Zx (bad)\n", r);
gmp_printf ("ref = %Zx\n", ref);
abort ();
}
}
}
mpz_clears (bs, a, b, r, ref, NULL);
}
int
main (int argc, char *argv[])
{
tests_start ();
tests_end ();
check_add ();
check_mul ();
check_roinit ();
return 0;
}
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