math/test-math-iseqsig.cc

   1 /* Test for the C++ implementation of iseqsig.
   2    Copyright (C) 2017-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #define _GNU_SOURCE 1
  20 #include <math.h>
  21 #include <stdio.h>
  22
  23 #include <limits>
  24
  25 /* There is no NaN for _Float128 in std::numeric_limits.
  26    Include ieee754_float128.h and use the bitfields in the union
  27    ieee854_float128.ieee_nan to build a NaN.  */
  28 #if __HAVE_DISTINCT_FLOAT128
  29 # include <ieee754_float128.h>
  30 #endif
  31
  32 #include <support/check.h>
  33
  34 static void
  35 check (int actual, int expected, const char *actual_expr, int line)
  36 {
  37   if (actual != expected)
  38     {
  39       support_record_failure ();
  40       printf ("%s:%d: error: %s\n", __FILE__, line, actual_expr);
  41       printf ("%s:%d:   expected: %d\n", __FILE__, line, expected);
  42       printf ("%s:%d:   actual: %d\n", __FILE__, line, actual);
  43     }
  44 }
  45
  46 #define CHECK(actual, expected) \
  47   check ((actual), (expected), #actual, __LINE__)
  48
  49 template <class T1, class T2>
  50 static void
  51 check_type ()
  52 {
  53   T1 t1 = 0;
  54   T2 t2 = 0;
  55   CHECK (iseqsig (t1, t2), 1);
  56
  57   t2 = 1;
  58   CHECK (iseqsig (t1, t2), 0);
  59
  60   if (std::numeric_limits<T1>::has_quiet_NaN
  61       && std::numeric_limits<T2>::has_quiet_NaN)
  62     {
  63       CHECK (iseqsig (std::numeric_limits<T1>::quiet_NaN (), t2), 0);
  64       CHECK (iseqsig (t1, std::numeric_limits<T2>::quiet_NaN ()), 0);
  65       CHECK (iseqsig (std::numeric_limits<T1>::quiet_NaN (),
  66                       std::numeric_limits<T2>::quiet_NaN ()), 0);
  67     }
  68 }
  69
  70 #if __HAVE_DISTINCT_FLOAT128
  71 static void
  72 check_float128 ()
  73 {
  74   ieee854_float128 q1, q2, q3_nan;
  75
  76   q1.d = 0;
  77   q2.d = 1;
  78   q3_nan.ieee_nan.negative = 0;
  79   q3_nan.ieee_nan.exponent = 0x7FFF;
  80   q3_nan.ieee_nan.quiet_nan = 1;
  81   q3_nan.ieee_nan.mantissa0 = 0x0000;
  82   q3_nan.ieee_nan.mantissa1 = 0x00000000;
  83   q3_nan.ieee_nan.mantissa2 = 0x00000000;
  84   q3_nan.ieee_nan.mantissa3 = 0x00000000;
  85
  86   CHECK (iseqsig (q1.d, q1.d), 1);
  87   CHECK (iseqsig (q1.d, q2.d), 0);
  88   CHECK (iseqsig (q1.d, q3_nan.d), 0);
  89   CHECK (iseqsig (q3_nan.d, q3_nan.d), 0);
  90 }
  91 #endif
  92
  93 static int
  94 do_test (void)
  95 {
  96   check_type<float, float> ();
  97   check_type<float, double> ();
  98   check_type<float, long double> ();
  99   check_type<double, float> ();
 100   check_type<double, double> ();
 101   check_type<double, long double> ();
 102   check_type<long double, float> ();
 103   check_type<long double, double> ();
 104   check_type<long double, long double> ();
 105 #if __HAVE_DISTINCT_FLOAT128
 106   check_float128 ();
 107 #endif
 108   return 0;
 109 }
 110
 111 #include <support/test-driver.c>