math/libm-test-round.inc

   1 /* Test round.
   2    Copyright (C) 1997-2019 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include "libm-test-driver.c"
  20
  21 static const struct test_f_f_data round_test_data[] =
  22   {
  23     TEST_f_f (round, 0, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  24     TEST_f_f (round, minus_zero, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  25     TEST_f_f (round, plus_infty, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  26     TEST_f_f (round, minus_infty, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  27     TEST_f_f (round, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  28     TEST_f_f (round, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  29     TEST_f_f (round, snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
  30     TEST_f_f (round, -snan_value, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION),
  31
  32     TEST_f_f (round, min_subnorm_value, 0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  33     TEST_f_f (round, min_value, 0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  34     TEST_f_f (round, 1, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  35     TEST_f_f (round, 2, 2, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  36     TEST_f_f (round, 0x1p23, 0x1p23, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  37     TEST_f_f (round, 0x1p24, 0x1p24, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  38     TEST_f_f (round, 0x1p25, 0x1p25, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  39     TEST_f_f (round, 0x1p52, 0x1p52, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  40     TEST_f_f (round, 0x1p53, 0x1p53, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  41     TEST_f_f (round, 0x1p54, 0x1p54, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  42     TEST_f_f (round, 0x1p63, 0x1p63, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  43     TEST_f_f (round, 0x1p64, 0x1p64, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  44     TEST_f_f (round, 0x1p65, 0x1p65, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  45     TEST_f_f (round, 0x1p105, 0x1p105, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  46     TEST_f_f (round, 0x1p106, 0x1p106, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  47     TEST_f_f (round, 0x1p107, 0x1p107, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  48     TEST_f_f (round, 0x1p112, 0x1p112, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  49     TEST_f_f (round, 0x1p113, 0x1p113, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  50     TEST_f_f (round, 0x1p114, 0x1p114, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  51     TEST_f_f (round, max_value, max_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  52     TEST_f_f (round, -min_subnorm_value, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  53     TEST_f_f (round, -min_value, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  54     TEST_f_f (round, -1, -1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  55     TEST_f_f (round, -2, -2, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  56     TEST_f_f (round, -0x1p23, -0x1p23, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  57     TEST_f_f (round, -0x1p24, -0x1p24, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  58     TEST_f_f (round, -0x1p25, -0x1p25, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  59     TEST_f_f (round, -0x1p52, -0x1p52, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  60     TEST_f_f (round, -0x1p53, -0x1p53, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  61     TEST_f_f (round, -0x1p54, -0x1p54, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  62     TEST_f_f (round, -0x1p63, -0x1p63, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  63     TEST_f_f (round, -0x1p64, -0x1p64, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  64     TEST_f_f (round, -0x1p65, -0x1p65, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  65     TEST_f_f (round, -0x1p105, -0x1p105, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  66     TEST_f_f (round, -0x1p106, -0x1p106, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  67     TEST_f_f (round, -0x1p107, -0x1p107, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  68     TEST_f_f (round, -0x1p112, -0x1p112, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  69     TEST_f_f (round, -0x1p113, -0x1p113, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  70     TEST_f_f (round, -0x1p114, -0x1p114, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  71     TEST_f_f (round, -max_value, -max_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  72
  73     TEST_f_f (round, 0.2L, 0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  74     TEST_f_f (round, -0.2L, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  75     TEST_f_f (round, 0.5, 1.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  76     TEST_f_f (round, -0.5, -1.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  77     TEST_f_f (round, 0.8L, 1.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  78     TEST_f_f (round, -0.8L, -1.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  79     TEST_f_f (round, 1.5, 2.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  80     TEST_f_f (round, -1.5, -2.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  81     TEST_f_f (round, 0.1, 0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  82     TEST_f_f (round, 0.25, 0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  83     TEST_f_f (round, 0.625, 1.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  84     TEST_f_f (round, -0.1, -0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  85     TEST_f_f (round, -0.25, -0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  86     TEST_f_f (round, -0.625, -1.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  87     TEST_f_f (round, 2097152.5, 2097153, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  88     TEST_f_f (round, -2097152.5, -2097153, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  89
  90 #if !TEST_COND_binary32
  91     TEST_f_f (round, 0xffffffffffff.0p0L, 0xffffffffffff.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  92     TEST_f_f (round, 0xffffffffffff.4p0L, 0xffffffffffff.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  93     TEST_f_f (round, 0xffffffffffff.8p0L, 0x1000000000000.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  94     TEST_f_f (round, 0xffffffffffff.cp0L, 0x1000000000000.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  95     TEST_f_f (round, -0xffffffffffff.0p0L, -0xffffffffffff.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  96     TEST_f_f (round, -0xffffffffffff.4p0L, -0xffffffffffff.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  97     TEST_f_f (round, -0xffffffffffff.8p0L, -0x1000000000000.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  98     TEST_f_f (round, -0xffffffffffff.cp0L, -0x1000000000000.0p0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
  99 #endif
 100
 101 #if MANT_DIG >= 64
 102     /* The result can only be represented in long double.  */
 103     TEST_f_f (round, 4503599627370495.5L, 4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 104     TEST_f_f (round, 4503599627370496.25L, 4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 105     TEST_f_f (round, 4503599627370496.5L, 4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 106     TEST_f_f (round, 4503599627370496.75L, 4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 107     TEST_f_f (round, 4503599627370497.5L, 4503599627370498.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 108 # if MANT_DIG > 100
 109     TEST_f_f (round, 4503599627370494.5000000000001L, 4503599627370495.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 110     TEST_f_f (round, 4503599627370495.5000000000001L, 4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 111     TEST_f_f (round, 4503599627370496.5000000000001L, 4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 112 # endif
 113
 114     TEST_f_f (round, -4503599627370495.5L, -4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 115     TEST_f_f (round, -4503599627370496.25L, -4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 116     TEST_f_f (round, -4503599627370496.5L, -4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 117     TEST_f_f (round, -4503599627370496.75L, -4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 118     TEST_f_f (round, -4503599627370497.5L, -4503599627370498.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 119 # if MANT_DIG > 100
 120     TEST_f_f (round, -4503599627370494.5000000000001L, -4503599627370495.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 121     TEST_f_f (round, -4503599627370495.5000000000001L, -4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 122     TEST_f_f (round, -4503599627370496.5000000000001L, -4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 123 # endif
 124
 125     TEST_f_f (round, 9007199254740991.5L, 9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 126     TEST_f_f (round, 9007199254740992.25L, 9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 127     TEST_f_f (round, 9007199254740992.5L, 9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 128     TEST_f_f (round, 9007199254740992.75L, 9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 129     TEST_f_f (round, 9007199254740993.5L, 9007199254740994.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 130
 131     TEST_f_f (round, -9007199254740991.5L, -9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 132     TEST_f_f (round, -9007199254740992.25L, -9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 133     TEST_f_f (round, -9007199254740992.5L, -9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 134     TEST_f_f (round, -9007199254740992.75L, -9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 135     TEST_f_f (round, -9007199254740993.5L, -9007199254740994.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 136
 137 # if MANT_DIG > 100
 138     TEST_f_f (round, 9007199254740991.0000000000001L, 9007199254740991.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 139     TEST_f_f (round, 9007199254740992.0000000000001L, 9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 140     TEST_f_f (round, 9007199254740993.0000000000001L, 9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 141     TEST_f_f (round, 9007199254740991.5000000000001L, 9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 142     TEST_f_f (round, 9007199254740992.5000000000001L, 9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 143     TEST_f_f (round, 9007199254740993.5000000000001L, 9007199254740994.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 144
 145     TEST_f_f (round, -9007199254740991.0000000000001L, -9007199254740991.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 146     TEST_f_f (round, -9007199254740992.0000000000001L, -9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 147     TEST_f_f (round, -9007199254740993.0000000000001L, -9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 148     TEST_f_f (round, -9007199254740991.5000000000001L, -9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 149     TEST_f_f (round, -9007199254740992.5000000000001L, -9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 150     TEST_f_f (round, -9007199254740993.5000000000001L, -9007199254740994.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 151 # endif
 152
 153     TEST_f_f (round, 72057594037927935.5L, 72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 154     TEST_f_f (round, 72057594037927936.25L, 72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 155     TEST_f_f (round, 72057594037927936.5L, 72057594037927937.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 156     TEST_f_f (round, 72057594037927936.75L, 72057594037927937.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 157     TEST_f_f (round, 72057594037927937.5L, 72057594037927938.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 158
 159     TEST_f_f (round, -72057594037927935.5L, -72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 160     TEST_f_f (round, -72057594037927936.25L, -72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 161     TEST_f_f (round, -72057594037927936.5L, -72057594037927937.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 162     TEST_f_f (round, -72057594037927936.75L, -72057594037927937.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 163     TEST_f_f (round, -72057594037927937.5L, -72057594037927938.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 164
 165     /* Check cases where first double is a exact integer higher than 2^52 and
 166        the precision is determined by second long double for IBM long double.  */
 167     TEST_f_f (round,  34503599627370498.515625L, 34503599627370499.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 168     TEST_f_f (round, -34503599627370498.515625L, -34503599627370499.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 169 # if MANT_DIG >= 106
 170     TEST_f_f (round,  1192568192774434123539907640624.484375L, 1192568192774434123539907640624.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 171     TEST_f_f (round, -1192568192774434123539907640624.484375L, -1192568192774434123539907640624.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 172 # endif
 173
 174     TEST_f_f (round, 10141204801825835211973625643007.5L, 10141204801825835211973625643008.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 175     TEST_f_f (round, 10141204801825835211973625643008.25L, 10141204801825835211973625643008.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 176     TEST_f_f (round, 10141204801825835211973625643008.5L, 10141204801825835211973625643009.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 177     TEST_f_f (round, 10141204801825835211973625643008.75L, 10141204801825835211973625643009.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 178     TEST_f_f (round, 10141204801825835211973625643009.5L, 10141204801825835211973625643010.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 179 #endif
 180   };
 181
 182 static void
 183 round_test (void)
 184 {
 185   ALL_RM_TEST (round, 1, round_test_data, RUN_TEST_LOOP_f_f, END);
 186 }
 187
 188 static void
 189 do_test (void)
 190 {
 191   round_test ();
 192 }
 193
 194 /*
 195  * Local Variables:
 196  * mode:c
 197  * End:
 198  */