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.
252 lines
7.1 KiB
C
252 lines
7.1 KiB
C
/* Test file for mpfr_ui_div.
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Copyright 2000-2025 Free Software Foundation, Inc.
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Contributed by the Pascaline and Caramba projects, INRIA.
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This file is part of the GNU MPFR Library.
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The GNU MPFR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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The GNU MPFR Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MPFR Library; see the file COPYING.LESSER.
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If not, see <https://www.gnu.org/licenses/>. */
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#include "mpfr-test.h"
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/* checks that y/x gives the right result with 53 bits of precision */
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static void
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check (unsigned long y, const char *xs, mpfr_rnd_t rnd_mode, const char *zs)
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{
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mpfr_t xx, zz;
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mpfr_inits2 (53, xx, zz, (mpfr_ptr) 0);
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mpfr_set_str1 (xx, xs);
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mpfr_ui_div (zz, y, xx, rnd_mode);
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if (mpfr_cmp_str1(zz, zs))
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{
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printf ("expected quotient is %s, got ", zs);
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mpfr_out_str (stdout, 10, 0, zz, MPFR_RNDN);
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printf ("mpfr_ui_div failed for y=%lu x=%s with rnd_mode=%s\n",
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y, xs, mpfr_print_rnd_mode (rnd_mode));
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exit (1);
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}
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mpfr_clears (xx, zz, (mpfr_ptr) 0);
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}
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static void
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check_inexact (void)
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{
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mpfr_t x, y, z;
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mpfr_prec_t px, py;
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int inexact, cmp;
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unsigned long int u;
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int rnd;
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mpfr_init (x);
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mpfr_init (y);
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mpfr_init (z);
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for (px = MPFR_PREC_MIN; px < 300; px++)
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{
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mpfr_set_prec (x, px);
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do
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{
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mpfr_urandomb (x, RANDS);
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}
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while (mpfr_cmp_ui (x, 0) == 0);
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u = randlimb ();
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for (py = MPFR_PREC_MIN; py < 300; py++)
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{
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mpfr_set_prec (y, py);
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mpfr_set_prec (z, py + px);
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RND_LOOP (rnd)
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{
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inexact = mpfr_ui_div (y, u, x, (mpfr_rnd_t) rnd);
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if (mpfr_mul (z, y, x, (mpfr_rnd_t) rnd))
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{
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printf ("z <- y * x should be exact\n");
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exit (1);
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}
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cmp = mpfr_cmp_ui (z, u);
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if (rnd != MPFR_RNDF && ! SAME_SIGN (inexact, cmp))
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{
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printf ("Wrong inexact flag for u=%lu, rnd=%s\n",
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u, mpfr_print_rnd_mode ((mpfr_rnd_t) rnd));
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printf ("expected %d, got %d\n", cmp, inexact);
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printf ("x = "); mpfr_dump (x);
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printf ("y = "); mpfr_dump (y);
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printf ("y*x = "); mpfr_dump (z);
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exit (1);
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}
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}
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}
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}
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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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static void
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check_special (void)
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{
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mpfr_t d, q;
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mpfr_init2 (d, 100L);
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mpfr_init2 (q, 100L);
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/* 1/+inf == +0 */
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MPFR_SET_INF (d);
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MPFR_SET_POS (d);
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mpfr_clear_flags ();
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MPFR_ASSERTN (mpfr_ui_div (q, 1L, d, MPFR_RNDZ) == 0); /* exact */
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MPFR_ASSERTN (MPFR_IS_ZERO (q) && MPFR_IS_POS (q));
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MPFR_ASSERTN (__gmpfr_flags == 0);
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/* 1/-inf == -0 */
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MPFR_SET_INF (d);
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MPFR_SET_NEG (d);
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mpfr_clear_flags ();
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MPFR_ASSERTN (mpfr_ui_div (q, 1L, d, MPFR_RNDZ) == 0); /* exact */
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MPFR_ASSERTN (MPFR_IS_ZERO (q) && MPFR_IS_NEG (q));
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MPFR_ASSERTN (__gmpfr_flags == 0);
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/* 1/nan == nan */
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MPFR_SET_NAN (d);
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mpfr_clear_flags ();
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MPFR_ASSERTN (mpfr_ui_div (q, 1L, d, MPFR_RNDZ) == 0); /* exact */
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MPFR_ASSERTN (mpfr_nan_p (q));
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MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN);
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/* 0/0 == nan */
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mpfr_set_ui (d, 0L, MPFR_RNDN);
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mpfr_clear_flags ();
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MPFR_ASSERTN (mpfr_ui_div (q, 0L, d, MPFR_RNDZ) == 0); /* exact */
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MPFR_ASSERTN (mpfr_nan_p (q));
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MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_NAN);
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/* 1/+0 = +inf */
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mpfr_set_ui (d, 0L, MPFR_RNDN);
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mpfr_clear_flags ();
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MPFR_ASSERTN (mpfr_ui_div (q, 1L, d, MPFR_RNDZ) == 0); /* exact */
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MPFR_ASSERTN (mpfr_inf_p (q) && mpfr_sgn (q) > 0);
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MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_DIVBY0);
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/* 1/-0 = -inf */
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mpfr_set_ui (d, 0L, MPFR_RNDN);
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mpfr_neg (d, d, MPFR_RNDN);
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mpfr_clear_flags ();
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MPFR_ASSERTN (mpfr_ui_div (q, 1L, d, MPFR_RNDZ) == 0); /* exact */
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MPFR_ASSERTN (mpfr_inf_p (q) && mpfr_sgn (q) < 0);
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MPFR_ASSERTN (__gmpfr_flags == MPFR_FLAGS_DIVBY0);
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/* 0/1 = +0 */
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mpfr_set_ui (d, 1L, MPFR_RNDN);
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mpfr_clear_flags ();
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MPFR_ASSERTN (mpfr_ui_div (q, 0L, d, MPFR_RNDZ) == 0); /* exact */
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MPFR_ASSERTN (MPFR_IS_ZERO (q) && MPFR_IS_POS (q));
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MPFR_ASSERTN (__gmpfr_flags == 0);
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/* 0/-1 = -0 */
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mpfr_set_si (d, -1, MPFR_RNDN);
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mpfr_clear_flags ();
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MPFR_ASSERTN (mpfr_ui_div (q, 0L, d, MPFR_RNDZ) == 0); /* exact */
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MPFR_ASSERTN (MPFR_IS_ZERO (q) && MPFR_IS_NEG (q));
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MPFR_ASSERTN (__gmpfr_flags == 0);
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mpfr_clear (d);
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mpfr_clear (q);
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}
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static int
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mpfr_inv (mpfr_ptr y, mpfr_srcptr x, mpfr_rnd_t r)
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{
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return mpfr_ui_div (y, 1, x, r);
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}
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static void
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check_overflow (void)
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{
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mpfr_exp_t emin, emax;
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mpfr_t x, y1, y2;
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int inex1, inex2, rnd_mode;
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mpfr_flags_t flags1, flags2;
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emin = mpfr_get_emin ();
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emax = mpfr_get_emax ();
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set_emin (MPFR_EMIN_MIN);
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set_emax (MPFR_EMAX_MAX);
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mpfr_inits2 (32, x, y1, y2, (mpfr_ptr) 0);
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mpfr_setmin (x, MPFR_EMIN_MIN);
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RND_LOOP (rnd_mode)
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{
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inex1 = mpfr_overflow (y1, (mpfr_rnd_t) rnd_mode, 1);
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flags1 = MPFR_FLAGS_OVERFLOW | MPFR_FLAGS_INEXACT;
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mpfr_clear_flags ();
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inex2 = mpfr_ui_div (y2, 1, x, (mpfr_rnd_t) rnd_mode);
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flags2 = __gmpfr_flags;
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if (!(mpfr_equal_p (y1, y2) &&
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SAME_SIGN (inex1, inex2) &&
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flags1 == flags2))
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{
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printf ("Error in check_overflow for %s\n",
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mpfr_print_rnd_mode ((mpfr_rnd_t) rnd_mode));
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printf ("Expected ");
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mpfr_dump (y1);
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printf (" with inex = %d, flags =", inex1);
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flags_out (flags1);
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printf ("Got ");
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mpfr_dump (y2);
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printf (" with inex = %d, flags =", inex2);
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flags_out (flags2);
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exit (1);
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}
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}
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mpfr_clears (x, y1, y2, (mpfr_ptr) 0);
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set_emin (emin);
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set_emax (emax);
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}
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#define TEST_FUNCTION mpfr_ui_div
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#define ULONG_ARG1
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#define RAND_FUNCTION(x) mpfr_random2(x, MPFR_LIMB_SIZE (x), 1, RANDS)
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#include "tgeneric.c"
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int
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main (int argc, char *argv[])
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{
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tests_start_mpfr ();
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check_special ();
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check_inexact ();
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check(948002822, "1.22191250737771397120e+20", MPFR_RNDN,
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"7.758352715731357946e-12");
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check(1976245324, "1.25296395864546893357e+232", MPFR_RNDZ,
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"1.5772563211925444801e-223");
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check(740454110, "2.11496253355831863313e+183", MPFR_RNDZ,
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"3.5010270784996976041e-175");
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check(1690540942, "1.28278599852446657468e-276", MPFR_RNDU,
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"1.3178666932321966062e285");
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check(1476599377, "-2.14191393656148625995e+305", MPFR_RNDD,
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"-6.8938315017943889615e-297");
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check_overflow ();
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test_generic (MPFR_PREC_MIN, 1000, 100);
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/* inv is for 1/x */
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data_check ("data/inv", mpfr_inv, "mpfr_ui_div(1,x)");
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tests_end_mpfr ();
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return 0;
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}
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