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faster implementation of acb_get_mag_lower, plus more test code

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This commit is contained in:
Fredrik Johansson 2017-12-13 11:37:05 +01:00
parent 126f81264c
commit 1535e13956
5 changed files with 293 additions and 5 deletions
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28
acb/get_mag_lower.c
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@ -14,10 +14,28 @@
void void
acb_get_mag_lower(mag_t z, const acb_t x) acb_get_mag_lower(mag_t z, const acb_t x)
{ {
arf_t t; if (arb_is_zero(acb_imagref(x)))
arf_init(t); {
acb_get_abs_lbound_arf(t, x, MAG_BITS); arb_get_mag_lower(z, acb_realref(x));
arf_get_mag_lower(z, t); }
arf_clear(t); else if (arb_is_zero(acb_realref(x)))
{
arb_get_mag_lower(z, acb_imagref(x));
}
else
{
mag_t t;
mag_init(t);
arb_get_mag_lower(t, acb_realref(x));
arb_get_mag_lower(z, acb_imagref(x));
mag_mul_lower(t, t, t);
mag_mul_lower(z, z, z);
mag_add_lower(z, z, t);
mag_sqrt_lower(z, z);
mag_clear(t);
}
} }

66
acb/test/t-get_abs_lbound_arf.c Normal file
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@ -0,0 +1,66 @@
/*
Copyright (C) 2014 Fredrik Johansson
This file is part of Arb.
Arb is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include "acb.h"
int main()
{
slong iter;
flint_rand_t state;
flint_printf("get_abs_lbound_arf....");
fflush(stdout);
flint_randinit(state);
for (iter = 0; iter < 10000 * arb_test_multiplier(); iter++)
{
acb_t a;
arf_t m, m2, x, y, s;
acb_init(a);
arf_init(m);
arf_init(m2);
arf_init(x);
arf_init(y);
arf_init(s);
acb_randtest_special(a, state, 200, 10);
acb_get_abs_lbound_arf(m, a, 2 + n_randint(state, 100));
/* check m^2 <= x^2 + y^2 */
arf_mul(m2, m, m, ARF_PREC_EXACT, ARF_RND_DOWN);
arb_get_abs_lbound_arf(x, acb_realref(a), ARF_PREC_EXACT);
arb_get_abs_lbound_arf(y, acb_imagref(a), ARF_PREC_EXACT);
arf_sosq(s, x, y, ARF_PREC_EXACT, ARF_RND_DOWN);
if (arf_cmp(m2, s) > 0)
{
flint_printf("FAIL:\n\n");
flint_printf("a = "); acb_print(a); flint_printf("\n\n");
flint_printf("m = "); arf_print(m); flint_printf("\n\n");
flint_abort();
}
acb_clear(a);
arf_clear(m);
arf_clear(m2);
arf_clear(x);
arf_clear(y);
arf_clear(s);
}
flint_randclear(state);
flint_cleanup();
flint_printf("PASS\n");
return EXIT_SUCCESS;
}

66
acb/test/t-get_abs_ubound_arf.c Normal file
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@ -0,0 +1,66 @@
/*
Copyright (C) 2014 Fredrik Johansson
This file is part of Arb.
Arb is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include "acb.h"
int main()
{
slong iter;
flint_rand_t state;
flint_printf("get_abs_ubound_arf....");
fflush(stdout);
flint_randinit(state);
for (iter = 0; iter < 10000 * arb_test_multiplier(); iter++)
{
acb_t a;
arf_t m, m2, x, y, s;
acb_init(a);
arf_init(m);
arf_init(m2);
arf_init(x);
arf_init(y);
arf_init(s);
acb_randtest_special(a, state, 200, 10);
acb_get_abs_ubound_arf(m, a, 2 + n_randint(state, 100));
/* check m^2 >= x^2 + y^2 */
arf_mul(m2, m, m, ARF_PREC_EXACT, ARF_RND_DOWN);
arb_get_abs_ubound_arf(x, acb_realref(a), ARF_PREC_EXACT);
arb_get_abs_ubound_arf(y, acb_imagref(a), ARF_PREC_EXACT);
arf_sosq(s, x, y, ARF_PREC_EXACT, ARF_RND_DOWN);
if (arf_cmp(m2, s) < 0)
{
flint_printf("FAIL:\n\n");
flint_printf("a = "); acb_print(a); flint_printf("\n\n");
flint_printf("m = "); arf_print(m); flint_printf("\n\n");
flint_abort();
}
acb_clear(a);
arf_clear(m);
arf_clear(m2);
arf_clear(x);
arf_clear(y);
arf_clear(s);
}
flint_randclear(state);
flint_cleanup();
flint_printf("PASS\n");
return EXIT_SUCCESS;
}

69
acb/test/t-get_mag.c Normal file
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@ -0,0 +1,69 @@
/*
Copyright (C) 2014 Fredrik Johansson
This file is part of Arb.
Arb is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include "acb.h"
int main()
{
slong iter;
flint_rand_t state;
flint_printf("get_mag....");
fflush(stdout);
flint_randinit(state);
for (iter = 0; iter < 10000 * arb_test_multiplier(); iter++)
{
acb_t a;
arf_t m2, x, y, s;
mag_t m;
acb_init(a);
mag_init(m);
arf_init(m2);
arf_init(x);
arf_init(y);
arf_init(s);
acb_randtest_special(a, state, 200, 10);
acb_get_mag(m, a);
MAG_CHECK_BITS(m)
/* check m^2 >= x^2 + y^2 */
arf_set_mag(m2, m);
arf_mul(m2, m2, m2, ARF_PREC_EXACT, ARF_RND_DOWN);
arb_get_abs_ubound_arf(x, acb_realref(a), ARF_PREC_EXACT);
arb_get_abs_ubound_arf(y, acb_imagref(a), ARF_PREC_EXACT);
arf_sosq(s, x, y, ARF_PREC_EXACT, ARF_RND_DOWN);
if (arf_cmp(m2, s) < 0)
{
flint_printf("FAIL:\n\n");
flint_printf("a = "); acb_print(a); flint_printf("\n\n");
flint_printf("m = "); mag_print(m); flint_printf("\n\n");
flint_abort();
}
acb_clear(a);
mag_clear(m);
arf_clear(m2);
arf_clear(x);
arf_clear(y);
arf_clear(s);
}
flint_randclear(state);
flint_cleanup();
flint_printf("PASS\n");
return EXIT_SUCCESS;
}

69
acb/test/t-get_mag_lower.c Normal file
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@ -0,0 +1,69 @@
/*
Copyright (C) 2014 Fredrik Johansson
This file is part of Arb.
Arb is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include "acb.h"
int main()
{
slong iter;
flint_rand_t state;
flint_printf("get_mag_lower....");
fflush(stdout);
flint_randinit(state);
for (iter = 0; iter < 10000 * arb_test_multiplier(); iter++)
{
acb_t a;
arf_t m2, x, y, s;
mag_t m;
acb_init(a);
mag_init(m);
arf_init(m2);
arf_init(x);
arf_init(y);
arf_init(s);
acb_randtest_special(a, state, 200, 10);
acb_get_mag_lower(m, a);
MAG_CHECK_BITS(m)
/* check m^2 <= x^2 + y^2 */
arf_set_mag(m2, m);
arf_mul(m2, m2, m2, ARF_PREC_EXACT, ARF_RND_DOWN);
arb_get_abs_lbound_arf(x, acb_realref(a), ARF_PREC_EXACT);
arb_get_abs_lbound_arf(y, acb_imagref(a), ARF_PREC_EXACT);
arf_sosq(s, x, y, ARF_PREC_EXACT, ARF_RND_DOWN);
if (arf_cmp(m2, s) > 0)
{
flint_printf("FAIL:\n\n");
flint_printf("a = "); acb_print(a); flint_printf("\n\n");
flint_printf("m = "); mag_print(m); flint_printf("\n\n");
flint_abort();
}
acb_clear(a);
mag_clear(m);
arf_clear(m2);
arf_clear(x);
arf_clear(y);
arf_clear(s);
}
flint_randclear(state);
flint_cleanup();
flint_printf("PASS\n");
return EXIT_SUCCESS;
}