lib/msun/tests/lrint_test.c

   1 /*-
   2  * Copyright (c) 2005-2008 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 lrint(), lrintf(), llrint(), and llrintf().
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <fenv.h>
  35 #include <limits.h>
  36 #include <math.h>
  37 #include <stdio.h>
  38
  39 #ifdef  __i386__
  40 #include <ieeefp.h>
  41 #endif
  42
  43 #include "test-utils.h"
  44
  45 #define test(func, x, result, excepts)  do {                                    \
  46         ATF_CHECK(feclearexcept(FE_ALL_EXCEPT) == 0);                           \
  47         long long _r = (func)(x);                                               \
  48         ATF_CHECK_MSG(_r == (result) || fetestexcept(FE_INVALID),               \
  49             #func "(%Lg) returned %lld, expected %lld", (long double)x, _r,     \
  50             (long long)(result));                                               \
  51         CHECK_FP_EXCEPTIONS_MSG(excepts, FE_ALL_EXCEPT & ALL_STD_EXCEPT,        \
  52             "for %s(%s)", #func, #x);                                           \
  53 } while (0)
  54
  55 #define testall(x, result, excepts)     do {                            \
  56         test(lrint, x, result, excepts);                                \
  57         test(lrintf, x, result, excepts);                               \
  58         test(lrintl, x, result, excepts);                               \
  59         test(llrint, x, result, excepts);                               \
  60         test(llrintf, x, result, excepts);                              \
  61         test(llrintl, x, result, excepts);                              \
  62 } while (0)
  63
  64 #define IGNORE  0
  65
  66 #pragma STDC FENV_ACCESS ON
  67
  68 static void
  69 run_tests(void)
  70 {
  71         ATF_REQUIRE_EQ(0, fesetround(FE_DOWNWARD));
  72         testall(0.75, 0, FE_INEXACT);
  73         testall(-0.5, -1, FE_INEXACT);
  74
  75         ATF_REQUIRE_EQ(0, fesetround(FE_TONEAREST));
  76         testall(0.0, 0, 0);
  77         testall(0.25, 0, FE_INEXACT);
  78         testall(0.5, 0, FE_INEXACT);
  79         testall(-2.5, -2, FE_INEXACT);
  80         testall(1.0, 1, 0);
  81         testall(0x12345000p0, 0x12345000, 0);
  82         testall(0x1234.fp0, 0x1235, FE_INEXACT);
  83         testall(INFINITY, IGNORE, FE_INVALID);
  84         testall(NAN, IGNORE, FE_INVALID);
  85
  86 #if (LONG_MAX == 0x7fffffffl)
  87         ATF_REQUIRE_EQ(0, fesetround(FE_UPWARD));
  88         test(lrint, 0x7fffffff.8p0, IGNORE, FE_INVALID);
  89         test(lrint, -0x80000000.4p0, (long)-0x80000000l, FE_INEXACT);
  90
  91         ATF_REQUIRE_EQ(0, fesetround(FE_DOWNWARD));
  92         test(lrint, -0x80000000.8p0, IGNORE, FE_INVALID);
  93         test(lrint, 0x80000000.0p0, IGNORE, FE_INVALID);
  94         test(lrint, 0x7fffffff.4p0, 0x7fffffffl, FE_INEXACT);
  95         test(lrintf, 0x80000000.0p0f, IGNORE, FE_INVALID);
  96         test(lrintf, 0x7fffff80.0p0f, 0x7fffff80l, 0);
  97
  98         ATF_REQUIRE_EQ(0, fesetround(FE_TOWARDZERO));
  99         test(lrint, 0x7fffffff.8p0,  0x7fffffffl, FE_INEXACT);
 100         test(lrint, -0x80000000.8p0, -0x80000000l, FE_INEXACT);
 101         test(lrint, 0x80000000.0p0, IGNORE, FE_INVALID);
 102         test(lrintf, 0x80000000.0p0f, IGNORE, FE_INVALID);
 103         test(lrintf, 0x7fffff80.0p0f, 0x7fffff80l, 0);
 104 #elif (LONG_MAX == 0x7fffffffffffffffll)
 105         ATF_REQUIRE_EQ(0, fesetround(FE_TONEAREST));
 106         test(lrint, 0x8000000000000000.0p0, IGNORE, FE_INVALID);
 107         test(lrintf, 0x8000000000000000.0p0f, IGNORE, FE_INVALID);
 108         test(lrint, 0x7ffffffffffffc00.0p0, 0x7ffffffffffffc00l, 0);
 109         test(lrintf, 0x7fffff8000000000.0p0f, 0x7fffff8000000000l, 0);
 110         test(lrint, -0x8000000000000800.0p0, IGNORE, FE_INVALID);
 111         test(lrintf, -0x8000010000000000.0p0f, IGNORE, FE_INVALID);
 112         test(lrint, -0x8000000000000000.0p0, (long long)-0x8000000000000000ul, 0);
 113         test(lrintf, -0x8000000000000000.0p0f, (long long)-0x8000000000000000ul, 0);
 114 #else
 115 #error "Unsupported long size"
 116 #endif
 117
 118 #if (LLONG_MAX == 0x7fffffffffffffffLL)
 119         ATF_REQUIRE_EQ(0, fesetround(FE_TONEAREST));
 120         test(llrint, 0x8000000000000000.0p0, IGNORE, FE_INVALID);
 121         test(llrintf, 0x8000000000000000.0p0f, IGNORE, FE_INVALID);
 122         test(llrint, 0x7ffffffffffffc00.0p0, 0x7ffffffffffffc00ll, 0);
 123         test(llrintf, 0x7fffff8000000000.0p0f, 0x7fffff8000000000ll, 0);
 124         test(llrint, -0x8000000000000800.0p0, IGNORE, FE_INVALID);
 125         test(llrintf, -0x8000010000000000.0p0f, IGNORE, FE_INVALID);
 126         test(llrint, -0x8000000000000000.0p0, (long long)-0x8000000000000000ull, 0);
 127         test(llrintf, -0x8000000000000000.0p0f, (long long)-0x8000000000000000ull, 0);
 128 #else
 129 #error "Unsupported long long size"
 130 #endif
 131 }
 132
 133 ATF_TC_WITHOUT_HEAD(lrint);
 134 ATF_TC_BODY(lrint, tc)
 135 {
 136         run_tests();
 137 #ifdef  __i386__
 138         fpsetprec(FP_PE);
 139         run_tests();
 140 #endif
 141 }
 142
 143 ATF_TP_ADD_TCS(tp)
 144 {
 145     ATF_TP_ADD_TC(tp, lrint);
 146     return (atf_no_error());
 147 }