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      1 /* tdot -- test file for mpc_dot.
      2 
      3 Copyright (C) 2018, 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 "mpc-tests.h"
     22 
     23 static void
     24 check_special (void)
     25 {
     26   mpc_t z[3], res;
     27   mpc_ptr t[3];
     28   int i, inex;
     29 
     30   /* z[0] = (1,2), z[1] = (2,3), z[2] = (3,4) */
     31   for (i = 0; i < 3; i++)
     32     {
     33       mpc_init2 (z[i], 17);
     34       mpc_set_ui_ui (z[i], i+1, i+2, MPC_RNDNN);
     35       t[i] = z[i];
     36     }
     37   mpc_init2 (res, 17);
     38   /* dot product of empty vectors is 0 */
     39   inex = mpc_dot (res, t, t, 0, MPC_RNDNN);
     40   MPC_ASSERT (inex == 0);
     41   MPC_ASSERT (mpfr_zero_p (mpc_realref (res)));
     42   MPC_ASSERT (mpfr_zero_p (mpc_imagref (res)));
     43   MPC_ASSERT (mpfr_signbit (mpc_realref (res)) == 0);
     44   MPC_ASSERT (mpfr_signbit (mpc_imagref (res)) == 0);
     45   /* (1,2)*(1,2) = (-3,4) */
     46   inex = mpc_dot (res, t, t, 1, MPC_RNDNN);
     47   MPC_ASSERT (inex == 0);
     48   MPC_ASSERT (mpfr_regular_p (mpc_realref (res)));
     49   MPC_ASSERT (mpfr_regular_p (mpc_imagref (res)));
     50   MPC_ASSERT (mpfr_cmp_si (mpc_realref (res), -3) == 0);
     51   MPC_ASSERT (mpfr_cmp_ui (mpc_imagref (res), 4) == 0);
     52   /* (1,2)*(1,2) + (2,3)*(2,3) = (-8,16) */
     53   inex = mpc_dot (res, t, t, 2, MPC_RNDNN);
     54   MPC_ASSERT (inex == 0);
     55   MPC_ASSERT (mpfr_regular_p (mpc_realref (res)));
     56   MPC_ASSERT (mpfr_regular_p (mpc_imagref (res)));
     57   MPC_ASSERT (mpfr_cmp_si (mpc_realref (res), -8) == 0);
     58   MPC_ASSERT (mpfr_cmp_ui (mpc_imagref (res), 16) == 0);
     59   /* (1,2)*(1,2) + (2,3)*(2,3) + (3,4)*(3,4) = (-15,40) */
     60   inex = mpc_dot (res, t, t, 3, MPC_RNDNN);
     61   MPC_ASSERT (inex == 0);
     62   MPC_ASSERT (mpfr_regular_p (mpc_realref (res)));
     63   MPC_ASSERT (mpfr_regular_p (mpc_imagref (res)));
     64   MPC_ASSERT (mpfr_cmp_si (mpc_realref (res), -15) == 0);
     65   MPC_ASSERT (mpfr_cmp_ui (mpc_imagref (res), 40) == 0);
     66   for (i = 0; i < 3; i++)
     67     mpc_clear (z[i]);
     68   mpc_clear (res);
     69 }
     70 
     71 /* bug reported by Trevor Spiteri */
     72 static void
     73 bug20200717 (void)
     74 {
     75   mpc_t a;
     76   mpc_ptr p[1];
     77   mpc_init2 (a, 53);
     78   mpc_set_ui_ui (a, 1, 2, MPC_RNDNN);
     79   p[0] = a;
     80   mpc_dot (a, p, p, 1, MPC_RNDNN);
     81   MPC_ASSERT (mpfr_cmp_si (mpc_realref (a), -3) == 0);
     82   MPC_ASSERT (mpfr_cmp_ui (mpc_imagref (a), 4) == 0);
     83   mpc_clear (a);
     84 }
     85 
     86 int
     87 main (void)
     88 {
     89   test_start ();
     90 
     91   bug20200717 ();
     92   check_special ();
     93 
     94   test_end ();
     95 
     96   return 0;
     97 }
     98 
     99