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      1 /* tdiv -- test file for mpc_div.
      2 
      3 Copyright (C) 2002, 2008, 2009, 2011, 2013, 2020 INRIA
      4 
      5 This file is part of GNU MPC.
      6 
      7 GNU MPC is free software; you can redistribute it and/or modify it under
      8 the terms of the GNU Lesser General Public License as published by the
      9 Free Software Foundation; either version 3 of the License, or (at your
     10 option) any later version.
     11 
     12 GNU MPC is distributed in the hope that it will be useful, but WITHOUT ANY
     13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
     14 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
     15 more details.
     16 
     17 You should have received a copy of the GNU Lesser General Public License
     18 along with this program. If not, see http://www.gnu.org/licenses/ .
     19 */
     20 
     21 #include <stdlib.h>
     22 #include "mpc-tests.h"
     23 
     24 #define MPC_FUNCTION_CALL                                               \
     25   P[0].mpc_inex = mpc_div (P[1].mpc, P[2].mpc, P[3].mpc, P[4].mpc_rnd)
     26 #define MPC_FUNCTION_CALL_REUSE_OP1                                     \
     27   P[0].mpc_inex = mpc_div (P[1].mpc, P[1].mpc, P[3].mpc, P[4].mpc_rnd)
     28 #define MPC_FUNCTION_CALL_REUSE_OP2                                     \
     29   P[0].mpc_inex = mpc_div (P[1].mpc, P[2].mpc, P[1].mpc, P[4].mpc_rnd)
     30 
     31 #include "data_check.tpl"
     32 #include "tgeneric.tpl"
     33 
     34 static void
     35 bug20200206 (void)
     36 {
     37   mpfr_exp_t emin = mpfr_get_emin ();
     38   mpfr_exp_t emax = mpfr_get_emax ();
     39   mpc_t x, y, z, zr;
     40 
     41   mpfr_set_emin (-1073);
     42   mpfr_set_emax (0);
     43   mpc_init2 (x, 53);
     44   mpc_init2 (y, 53);
     45   mpc_init2 (z, 53);
     46   mpc_init2 (zr, 53);
     47   mpfr_set_d (mpc_realref (x), -5.3310997889069899e-216, MPFR_RNDN);
     48   mpfr_set_d (mpc_imagref (x), -4.9188093228194944e-89, MPFR_RNDN);
     49   mpfr_set_d (mpc_realref (y), -3.6801500191882962e-14, MPFR_RNDN);
     50   mpfr_set_d (mpc_imagref (y), 4.5420247980297260e-145, MPFR_RNDN);
     51   mpc_div (z, x, y, MPC_RNDNN);
     52   /* quotient is 1.44844440684571e-202 + 1.33657848108714e-75*I,
     53      where both the real and imaginary parts fit in the exponent range */
     54   mpfr_set_d (mpc_realref (zr), 0x2.d69b18295a8cep-672, MPFR_RNDN);
     55   mpfr_set_d (mpc_imagref (zr), 0x9.ac3e51d39eea8p-252, MPFR_RNDN);
     56   if (mpc_cmp (z, zr))
     57     {
     58       printf ("Incorrect division with reduced exponent range:\n");
     59       mpfr_printf ("Expected (%Re,%Re)\n", mpc_realref (zr), mpc_imagref (zr));
     60       mpfr_printf ("Got      (%Re,%Re)\n", mpc_realref (z), mpc_imagref (z));
     61       exit (1);
     62     }
     63   mpc_clear (x);
     64   mpc_clear (y);
     65   mpc_clear (z);
     66   mpc_clear (zr);
     67   mpfr_set_emin (emin);
     68   mpfr_set_emax (emax);
     69 }
     70 
     71 int
     72 main (void)
     73 {
     74   test_start ();
     75 
     76   bug20200206 ();
     77   data_check_template ("div.dsc", "div.dat");
     78 
     79   tgeneric_template ("div.dsc", 2, 1024, 7, 4096);
     80 
     81   test_end ();
     82 
     83   return 0;
     84 }
     85