tests/lib/libc/gen/t_floatunditf.c

   1 /* $NetBSD: t_floatunditf.c,v 1.6 2014/11/04 00:20:19 justin Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <atf-c.h>
  30 #include <inttypes.h>
  31 #include <math.h>
  32
  33 #ifdef __HAVE_LONG_DOUBLE
  34 static const struct {
  35         uint64_t u64;
  36         long double ld;
  37 } testcases[] = {
  38         { 0xffffffffffffffffULL, 0xf.fffffffffffffffp+60L },
  39         { 0xfffffffffffffffeULL, 0xf.ffffffffffffffep+60L },
  40         { 0xfffffffffffffffdULL, 0xf.ffffffffffffffdp+60L },
  41         { 0xfffffffffffffffcULL, 0xf.ffffffffffffffcp+60L },
  42         { 0x7fffffffffffffffULL, 0xf.ffffffffffffffep+59L },
  43         { 0x3fffffffffffffffULL, 0xf.ffffffffffffffcp+58L },
  44         { 0x1fffffffffffffffULL, 0xf.ffffffffffffff8p+57L },
  45         { 0xfffffffffffffffULL, 0xf.ffffffffffffffp+56L },
  46         { 0x7ffffffffffffffULL, 0xf.fffffffffffffep+55L },
  47         { 0x3ffffffffffffffULL, 0xf.fffffffffffffcp+54L },
  48         { 0x1ffffffffffffffULL, 0xf.fffffffffffff8p+53L },
  49         { 0xffffffffffffffULL, 0xf.fffffffffffffp+52L },
  50         { 0x7fffffffffffffULL, 0xf.ffffffffffffep+51L },
  51         { 0x3fffffffffffffULL, 0xf.ffffffffffffcp+50L },
  52         { 0x1fffffffffffffULL, 0xf.ffffffffffff8p+49L },
  53         { 0xfffffffffffffULL, 0xf.ffffffffffffp+48L },
  54         { 0x7ffffffffffffULL, 0xf.fffffffffffep+47L },
  55         { 0x3ffffffffffffULL, 0xf.fffffffffffcp+46L },
  56         { 0x1ffffffffffffULL, 0xf.fffffffffff8p+45L },
  57         { 0xffffffffffffULL, 0xf.fffffffffffp+44L },
  58         { 0x7fffffffffffULL, 0xf.ffffffffffep+43L },
  59         { 0x3fffffffffffULL, 0xf.ffffffffffcp+42L },
  60         { 0x1fffffffffffULL, 0xf.ffffffffff8p+41L },
  61         { 0xfffffffffffULL, 0xf.ffffffffffp+40L },
  62         { 0x7ffffffffffULL, 0xf.fffffffffep+39L },
  63         { 0x3ffffffffffULL, 0xf.fffffffffcp+38L },
  64         { 0x1ffffffffffULL, 0xf.fffffffff8p+37L },
  65         { 0xffffffffffULL, 0xf.fffffffffp+36L },
  66         { 0x7fffffffffULL, 0xf.ffffffffep+35L },
  67         { 0x3fffffffffULL, 0xf.ffffffffcp+34L },
  68         { 0x1fffffffffULL, 0xf.ffffffff8p+33L },
  69         { 0xfffffffffULL, 0xf.ffffffffp+32L },
  70         { 0x7ffffffffULL, 0xf.fffffffep+31L },
  71         { 0x3ffffffffULL, 0xf.fffffffcp+30L },
  72         { 0x1ffffffffULL, 0xf.fffffff8p+29L },
  73         { 0xffffffffULL, 0xf.fffffffp+28L },
  74         { 0x7fffffffULL, 0xf.ffffffep+27L },
  75         { 0x3fffffffULL, 0xf.ffffffcp+26L },
  76         { 0x1fffffffULL, 0xf.ffffff8p+25L },
  77         { 0xfffffffULL, 0xf.ffffffp+24L },
  78         { 0x7ffffffULL, 0xf.fffffep+23L },
  79         { 0x3ffffffULL, 0xf.fffffcp+22L },
  80         { 0x1ffffffULL, 0xf.fffff8p+21L },
  81         { 0xffffffULL, 0xf.fffffp+20L },
  82         { 0x7fffffULL, 0xf.ffffep+19L },
  83         { 0x3fffffULL, 0xf.ffffcp+18L },
  84         { 0x1fffffULL, 0xf.ffff8p+17L },
  85         { 0xfffffULL, 0xf.ffffp+16L },
  86         { 0x7ffffULL, 0xf.fffep+15L },
  87         { 0x3ffffULL, 0xf.fffcp+14L },
  88         { 0x1ffffULL, 0xf.fff8p+13L },
  89         { 0xffffULL, 0xf.fffp+12L },
  90         { 0x7fffULL, 0xf.ffep+11L },
  91         { 0x3fffULL, 0xf.ffcp+10L },
  92         { 0x1fffULL, 0xf.ff8p+9L },
  93         { 0xfffULL, 0xf.ffp+8L },
  94         { 0x7ffULL, 0xf.fep+7L },
  95         { 0x3ffULL, 0xf.fcp+6L },
  96         { 0x1ffULL, 0xf.f8p+5L },
  97         { 0xffULL, 0xf.fp+4L },
  98         { 0x7fULL, 0xf.ep+3L },
  99         { 0x3fULL, 0xf.cp+2L },
 100         { 0x1fULL, 0xf.8p+1L },
 101         { 0xfULL, 0xfp+0L },
 102         { 0x7ULL, 0xep-1L },
 103         { 0x3ULL, 0xcp-2L },
 104         { 0x1ULL, 0x8p-3L },
 105 };
 106 #endif
 107
 108 ATF_TC(floatunditf);
 109 ATF_TC_HEAD(floatunditf, tc)
 110 {
 111         atf_tc_set_md_var(tc, "descr",
 112             "Verify that uint64 -> long double conversion works");
 113 }
 114
 115 ATF_TC_BODY(floatunditf, tc)
 116 {
 117 #ifndef __HAVE_LONG_DOUBLE
 118         atf_tc_skip("Requires long double support");
 119 #else
 120         size_t i;
 121
 122         for (i = 0; i < __arraycount(testcases); ++i)
 123                 ATF_CHECK_MSG(
 124                     testcases[i].ld == (long double)testcases[i].u64,
 125                     "#%zu: expected %.20Lf, got %.20Lf\n", i,
 126                     testcases[i].ld,
 127                     (long double)testcases[i].u64);
 128 #endif
 129 }
 130
 131 ATF_TP_ADD_TCS(tp)
 132 {
 133         ATF_TP_ADD_TC(tp, floatunditf);
 134         return atf_no_error();
 135 }