mirror of
https://github.com/vale981/arb
synced 2025-03-06 09:51:39 -05:00
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/*
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Copyright (C) 2012 Fredrik Johansson
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This file is part of Arb.
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Arb is free software: you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version. See <http://www.gnu.org/licenses/>.
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*/
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#include "fmpr.h"
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int main()
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{
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slong iter;
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flint_rand_t state;
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flint_printf("div....");
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fflush(stdout);
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flint_randinit(state);
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for (iter = 0; iter < 100000 * arb_test_multiplier(); iter++)
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{
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slong bits, r1, r2;
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fmpr_t x, y, z, w;
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mpfr_t X, Y, Z;
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bits = 2 + n_randint(state, 200);
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fmpr_init(x);
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fmpr_init(y);
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fmpr_init(z);
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fmpr_init(w);
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mpfr_init2(X, bits + 100);
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mpfr_init2(Y, bits + 100);
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mpfr_init2(Z, bits);
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fmpr_randtest_special(x, state, bits + n_randint(state, 100), 10);
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fmpr_randtest_special(y, state, bits + n_randint(state, 100), 10);
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fmpr_randtest_special(z, state, bits + n_randint(state, 100), 10);
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fmpr_get_mpfr(X, x, MPFR_RNDN);
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fmpr_get_mpfr(Y, y, MPFR_RNDN);
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switch (n_randint(state, 4))
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{
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case 0:
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r1 = mpfr_div(Z, X, Y, MPFR_RNDZ);
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r2 = fmpr_div(z, x, y, bits, FMPR_RND_DOWN);
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break;
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case 1:
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r1 = mpfr_div(Z, X, Y, MPFR_RNDA);
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r2 = fmpr_div(z, x, y, bits, FMPR_RND_UP);
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break;
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case 2:
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r1 = mpfr_div(Z, X, Y, MPFR_RNDD);
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r2 = fmpr_div(z, x, y, bits, FMPR_RND_FLOOR);
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break;
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default:
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r1 = mpfr_div(Z, X, Y, MPFR_RNDU);
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r2 = fmpr_div(z, x, y, bits, FMPR_RND_CEIL);
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break;
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}
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/* we use slightly different semantics for special values (?) */
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if (mpfr_zero_p(Y))
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mpfr_set_nan(Z);
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if (mpfr_inf_p(X) && mpfr_zero_p(Y))
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mpfr_set_nan(Z);
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fmpr_set_mpfr(w, Z);
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if (!fmpr_equal(z, w) || ((r1 == 0) != (r2 == FMPR_RESULT_EXACT))
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|| !fmpr_check_ulp(z, r2, bits))
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{
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flint_printf("FAIL\n\n");
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flint_printf("bits = %wd\n", bits);
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flint_printf("r1 = %wd, r2 = %wd\n", r1, r2);
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flint_printf("x = "); fmpr_print(x); flint_printf("\n\n");
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flint_printf("y = "); fmpr_print(y); flint_printf("\n\n");
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flint_printf("z = "); fmpr_print(z); flint_printf("\n\n");
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flint_printf("w = "); fmpr_print(w); flint_printf("\n\n");
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abort();
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}
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fmpr_clear(x);
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fmpr_clear(y);
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fmpr_clear(z);
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fmpr_clear(w);
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mpfr_clear(X);
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mpfr_clear(Y);
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mpfr_clear(Z);
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}
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flint_randclear(state);
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flint_cleanup();
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flint_printf("PASS\n");
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return EXIT_SUCCESS;
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}
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