tools/regression/lib/msun/test-lround.c

   1 /*-
   2  * Copyright (c) 2005 David Schultz <das@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 /*
  28  * Test for lround(), lroundf(), llround(), and llroundf().
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <assert.h>
  35 #include <fenv.h>
  36 #include <limits.h>
  37 #include <math.h>
  38 #include <stdio.h>
  39
  40 /*
  41  * XXX The volatile here is to avoid gcc's bogus constant folding and work
  42  *     around the lack of support for the FENV_ACCESS pragma.
  43  */
  44 #define test(func, x, result, excepts)  do {                            \
  45         volatile double _d = x;                                         \
  46         assert(feclearexcept(FE_ALL_EXCEPT) == 0);                      \
  47         assert((func)(_d) == (result) || fetestexcept(FE_INVALID));     \
  48         assert(fetestexcept(FE_ALL_EXCEPT) == (excepts));               \
  49 } while (0)
  50
  51 #define testall(x, result, excepts)     do {                            \
  52         test(lround, x, result, excepts);                               \
  53         test(lroundf, x, result, excepts);                              \
  54         test(llround, x, result, excepts);                              \
  55         test(llroundf, x, result, excepts);                             \
  56 } while (0)
  57
  58 #define IGNORE  0
  59
  60 #pragma STDC FENV_ACCESS ON
  61
  62 int
  63 main(int argc, char *argv[])
  64 {
  65
  66         printf("1..1\n");
  67
  68         testall(0.0, 0, 0);
  69         testall(0.25, 0, FE_INEXACT);
  70         testall(0.5, 1, FE_INEXACT);
  71         testall(-0.5, -1, FE_INEXACT);
  72         testall(1.0, 1, 0);
  73         testall(0x12345000p0, 0x12345000, 0);
  74         testall(0x1234.fp0, 0x1235, FE_INEXACT);
  75         testall(INFINITY, IGNORE, FE_INVALID);
  76         testall(NAN, IGNORE, FE_INVALID);
  77
  78 #if (LONG_MAX == 0x7fffffffl)
  79         test(lround, 0x7fffffff.8p0, IGNORE, FE_INVALID);
  80         test(lround, -0x80000000.8p0, IGNORE, FE_INVALID);
  81         test(lround, 0x80000000.0p0, IGNORE, FE_INVALID);
  82         test(lround, 0x7fffffff.4p0, 0x7fffffffl, FE_INEXACT);
  83         test(lround, -0x80000000.4p0, -0x80000000l, FE_INEXACT);
  84         test(lroundf, 0x80000000.0p0f, IGNORE, FE_INVALID);
  85         test(lroundf, 0x7fffff80.0p0f, 0x7fffff80l, 0);
  86 #elif (LONG_MAX == 0x7fffffffffffffffll)
  87         test(lround, 0x8000000000000000.0p0, IGNORE, FE_INVALID);
  88         test(lroundf, 0x8000000000000000.0p0f, IGNORE, FE_INVALID);
  89         test(lround, 0x7ffffffffffffc00.0p0, 0x7ffffffffffffc00l, 0);
  90         test(lroundf, 0x7fffff8000000000.0p0f, 0x7fffff8000000000l, 0);
  91         test(lround, -0x8000000000000800.0p0, IGNORE, FE_INVALID);
  92         test(lroundf, -0x8000010000000000.0p0f, IGNORE, FE_INVALID);
  93         test(lround, -0x8000000000000000.0p0, -0x8000000000000000l, 0);
  94         test(lroundf, -0x8000000000000000.0p0f, -0x8000000000000000l, 0);
  95 #else
  96 #error "Unsupported long size"
  97 #endif
  98
  99 #if (LLONG_MAX == 0x7fffffffffffffffLL)
 100         test(llround, 0x8000000000000000.0p0, IGNORE, FE_INVALID);
 101         test(llroundf, 0x8000000000000000.0p0f, IGNORE, FE_INVALID);
 102         test(llround, 0x7ffffffffffffc00.0p0, 0x7ffffffffffffc00ll, 0);
 103         test(llroundf, 0x7fffff8000000000.0p0f, 0x7fffff8000000000ll, 0);
 104         test(llround, -0x8000000000000800.0p0, IGNORE, FE_INVALID);
 105         test(llroundf, -0x8000010000000000.0p0f, IGNORE, FE_INVALID);
 106         test(llround, -0x8000000000000000.0p0, -0x8000000000000000ll, 0);
 107         test(llroundf, -0x8000000000000000.0p0f, -0x8000000000000000ll, 0);
 108 #else
 109 #error "Unsupported long long size"
 110 #endif
 111
 112         printf("ok 1 - lround\n");
 113
 114         return (0);
 115 }