File: tsub_z.c

package info (click to toggle)
mpfi 1.5.3%2Bds-2
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 2,400 kB
  • sloc: ansic: 14,992; makefile: 155; sh: 6
file content (103 lines) | stat: -rw-r--r-- 2,860 bytes parent folder | download | duplicates (7)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
/* tsub_z.c -- Test mpfi_sub_z.

Copyright 2010,
                     Spaces project, Inria Lorraine
                     and Salsa project, INRIA Rocquencourt,
                     and Arenaire project, Inria Rhone-Alpes, France
                     and Lab. ANO, USTL (Univ. of Lille),  France


This file is part of the MPFI Library.

The MPFI Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version.

The MPFI Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
License for more details.

You should have received a copy of the GNU Lesser General Public License
along with the MPFI Library; see the file COPYING.LIB.  If not, write to
the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301, USA. */

#include "mpfi-tests.h"

void
check_overflow ()
{
  mpfr_t max;
  mpfi_t a;
  mpz_t z;
  int inexact;

  mpz_init (z);
  mpfi_init2 (a, 53);
  mpfr_init2 (max, 53);
  mpz_set_si (z, -4096);
  mpfr_set_ui (&(a->left), 1, MPFI_RNDD);
  mpfr_set_inf (max, +1);
  mpfr_nextbelow (max);
  mpfr_set (&(a->right), max, MPFI_RNDU);

  inexact = mpfi_sub_z (a, a, z);

  if (!mpfr_inf_p (&(a->right))) {
    printf ("Error: mpfi_sub_z does not correctly handle positive "
            "overflow.\n");
    exit (1);
  }

  if (!MPFI_RIGHT_IS_INEXACT (inexact) || MPFI_LEFT_IS_INEXACT (inexact)) {
    printf ("Error: mpfi_sub_z does not return correct value when positive "
            "overflow.\n     got = %d\nexpected = %d\n", inexact,
            MPFI_FLAGS_RIGHT_ENDPOINT_INEXACT);
    exit (1);
  }

  mpz_neg (z, z);
  mpfr_set_inf (max, -1);
  mpfr_nextabove (max);
  mpfr_set (&(a->left), max, MPFI_RNDD);
  mpfr_set_ui (&(a->right), 1, MPFI_RNDU);

  inexact = mpfi_sub_z (a, a, z);

  if (!mpfr_inf_p (&(a->left))) {
    printf ("Error: mpfi_sub_z does not correctly handle negative "
            "overflow.\n");
    exit (1);
  }

  if (!MPFI_LEFT_IS_INEXACT (inexact) || MPFI_RIGHT_IS_INEXACT (inexact)) {
    printf ("Error: mpfi_sub_z does not return correct value when negative "
            "overflow.\n     got = %d\nexpected = %d\n", inexact,
            MPFI_FLAGS_LEFT_ENDPOINT_INEXACT);
    exit (1);
  }

  mpz_clear (z);
  mpfi_clear (a);
  mpfr_clear (max);
}

int
main (int argc, char **argv)
{
  struct mpfi_function_t i_sub_z;

  mpfi_fun_init_IIZ (&i_sub_z, mpfi_sub_z, mpfr_sub_z);
  test_start ();

  check_data (&i_sub_z, "sub_z.dat");
  check_random (&i_sub_z, 2, 1000, 10);
  check_overflow ();

  test_end ();
  mpfi_fun_clear (&i_sub_z);

  return 0;
}