tests/lib/libm/t_cos.c

   1 /* $NetBSD: t_cos.c,v 1.4 2014/03/03 10:39:08 martin Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jukka Ruohonen.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <atf-c.h>
  33 #include <math.h>
  34
  35 static const struct {
  36         int             angle;
  37         double          x;
  38         double          y;
  39 } angles[] = {
  40         { -180, -3.141592653589793, -1.0000000000000000 },
  41         { -135, -2.356194490192345, -0.7071067811865476 },
  42         {  -90, -1.570796326794897,  0.0000000000000000 },
  43         {  -45, -0.785398163397448,  0.7071067811865476 },
  44         {    0,  0.000000000000000,  1.0000000000000000 },
  45         {   30,  0.523598775598299,  0.8660254037844386 },
  46         {   45,  0.785398163397448,  0.7071067811865476 },
  47         {   60,  1.047197551196598,  0.5000000000000000 },
  48         {   90,  1.570796326794897,  0.0000000000000000 },
  49         {  120,  2.094395102393195, -0.5000000000000000 },
  50         {  135,  2.356194490192345, -0.7071067811865476 },
  51         {  150,  2.617993877991494, -0.8660254037844386 },
  52         {  180,  3.141592653589793, -1.0000000000000000 },
  53         {  270,  4.712388980384690,  0.0000000000000000 },
  54         {  360,  6.283185307179586,  1.0000000000000000 }
  55 };
  56
  57 /*
  58  * cos(3)
  59  */
  60 ATF_TC(cos_angles);
  61 ATF_TC_HEAD(cos_angles, tc)
  62 {
  63         atf_tc_set_md_var(tc, "descr", "Test some selected angles");
  64 }
  65
  66 ATF_TC_BODY(cos_angles, tc)
  67 {
  68         const double eps = 1.0e-15;
  69         size_t i;
  70
  71         for (i = 0; i < __arraycount(angles); i++) {
  72
  73                 if (fabs(cos(angles[i].x) - angles[i].y) > eps)
  74                         atf_tc_fail_nonfatal("cos(%d deg) != %0.01f",
  75                             angles[i].angle, angles[i].y);
  76         }
  77 }
  78
  79 ATF_TC(cos_nan);
  80 ATF_TC_HEAD(cos_nan, tc)
  81 {
  82         atf_tc_set_md_var(tc, "descr", "Test cos(NaN) == NaN");
  83 }
  84
  85 ATF_TC_BODY(cos_nan, tc)
  86 {
  87         const double x = 0.0L / 0.0L;
  88
  89         ATF_CHECK(isnan(x) != 0);
  90         ATF_CHECK(isnan(cos(x)) != 0);
  91 }
  92
  93 ATF_TC(cos_inf_neg);
  94 ATF_TC_HEAD(cos_inf_neg, tc)
  95 {
  96         atf_tc_set_md_var(tc, "descr", "Test cos(-Inf) == NaN");
  97 }
  98
  99 ATF_TC_BODY(cos_inf_neg, tc)
 100 {
 101         const double x = -1.0L / 0.0L;
 102
 103         ATF_CHECK(isnan(cos(x)) != 0);
 104 }
 105
 106 ATF_TC(cos_inf_pos);
 107 ATF_TC_HEAD(cos_inf_pos, tc)
 108 {
 109         atf_tc_set_md_var(tc, "descr", "Test cos(+Inf) == NaN");
 110 }
 111
 112 ATF_TC_BODY(cos_inf_pos, tc)
 113 {
 114         const double x = 1.0L / 0.0L;
 115
 116         ATF_CHECK(isnan(cos(x)) != 0);
 117 }
 118
 119
 120 ATF_TC(cos_zero_neg);
 121 ATF_TC_HEAD(cos_zero_neg, tc)
 122 {
 123         atf_tc_set_md_var(tc, "descr", "Test cos(-0.0) == 1.0");
 124 }
 125
 126 ATF_TC_BODY(cos_zero_neg, tc)
 127 {
 128         const double x = -0.0L;
 129
 130         ATF_CHECK(cos(x) == 1.0);
 131 }
 132
 133 ATF_TC(cos_zero_pos);
 134 ATF_TC_HEAD(cos_zero_pos, tc)
 135 {
 136         atf_tc_set_md_var(tc, "descr", "Test cos(+0.0) == 1.0");
 137 }
 138
 139 ATF_TC_BODY(cos_zero_pos, tc)
 140 {
 141         const double x = 0.0L;
 142
 143         ATF_CHECK(cos(x) == 1.0);
 144 }
 145
 146 /*
 147  * cosf(3)
 148  */
 149 ATF_TC(cosf_angles);
 150 ATF_TC_HEAD(cosf_angles, tc)
 151 {
 152         atf_tc_set_md_var(tc, "descr", "Test some selected angles");
 153 }
 154
 155 ATF_TC_BODY(cosf_angles, tc)
 156 {
 157         const float eps = 1.0e-7;
 158         float x, y;
 159         size_t i;
 160
 161         for (i = 0; i < __arraycount(angles); i++) {
 162
 163                 x = angles[i].x;
 164                 y = angles[i].y;
 165
 166                 if (fabsf(cosf(x) - y) > eps)
 167                         atf_tc_fail_nonfatal("cosf(%d deg) != %0.01f",
 168                             angles[i].angle, angles[i].y);
 169         }
 170 }
 171
 172 ATF_TC(cosf_nan);
 173 ATF_TC_HEAD(cosf_nan, tc)
 174 {
 175         atf_tc_set_md_var(tc, "descr", "Test cosf(NaN) == NaN");
 176 }
 177
 178 ATF_TC_BODY(cosf_nan, tc)
 179 {
 180         const float x = 0.0L / 0.0L;
 181
 182         ATF_CHECK(isnan(x) != 0);
 183         ATF_CHECK(isnan(cosf(x)) != 0);
 184 }
 185
 186 ATF_TC(cosf_inf_neg);
 187 ATF_TC_HEAD(cosf_inf_neg, tc)
 188 {
 189         atf_tc_set_md_var(tc, "descr", "Test cosf(-Inf) == NaN");
 190 }
 191
 192 ATF_TC_BODY(cosf_inf_neg, tc)
 193 {
 194         const float x = -1.0L / 0.0L;
 195
 196         if (isnan(cosf(x)) == 0) {
 197                 atf_tc_expect_fail("PR lib/45362");
 198                 atf_tc_fail("cosf(-Inf) != NaN");
 199         }
 200 }
 201
 202 ATF_TC(cosf_inf_pos);
 203 ATF_TC_HEAD(cosf_inf_pos, tc)
 204 {
 205         atf_tc_set_md_var(tc, "descr", "Test cosf(+Inf) == NaN");
 206 }
 207
 208 ATF_TC_BODY(cosf_inf_pos, tc)
 209 {
 210         const float x = 1.0L / 0.0L;
 211
 212         if (isnan(cosf(x)) == 0) {
 213                 atf_tc_expect_fail("PR lib/45362");
 214                 atf_tc_fail("cosf(+Inf) != NaN");
 215         }
 216 }
 217
 218
 219 ATF_TC(cosf_zero_neg);
 220 ATF_TC_HEAD(cosf_zero_neg, tc)
 221 {
 222         atf_tc_set_md_var(tc, "descr", "Test cosf(-0.0) == 1.0");
 223 }
 224
 225 ATF_TC_BODY(cosf_zero_neg, tc)
 226 {
 227         const float x = -0.0L;
 228
 229         ATF_CHECK(cosf(x) == 1.0);
 230 }
 231
 232 ATF_TC(cosf_zero_pos);
 233 ATF_TC_HEAD(cosf_zero_pos, tc)
 234 {
 235         atf_tc_set_md_var(tc, "descr", "Test cosf(+0.0) == 1.0");
 236 }
 237
 238 ATF_TC_BODY(cosf_zero_pos, tc)
 239 {
 240         const float x = 0.0L;
 241
 242         ATF_CHECK(cosf(x) == 1.0);
 243 }
 244
 245 ATF_TP_ADD_TCS(tp)
 246 {
 247
 248         ATF_TP_ADD_TC(tp, cos_angles);
 249         ATF_TP_ADD_TC(tp, cos_nan);
 250         ATF_TP_ADD_TC(tp, cos_inf_neg);
 251         ATF_TP_ADD_TC(tp, cos_inf_pos);
 252         ATF_TP_ADD_TC(tp, cos_zero_neg);
 253         ATF_TP_ADD_TC(tp, cos_zero_pos);
 254
 255         ATF_TP_ADD_TC(tp, cosf_angles);
 256         ATF_TP_ADD_TC(tp, cosf_nan);
 257         ATF_TP_ADD_TC(tp, cosf_inf_neg);
 258         ATF_TP_ADD_TC(tp, cosf_inf_pos);
 259         ATF_TP_ADD_TC(tp, cosf_zero_neg);
 260         ATF_TP_ADD_TC(tp, cosf_zero_pos);
 261
 262         return atf_no_error();
 263 }