tests/lib/libm/t_tan.c

   1 /* $NetBSD: t_tan.c,v 1.4 2011/09/15 11:05:50 he 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,  0.0000000000000000 },
  41         { -135, -2.356194490192345,  1.0000000000000000 },
  42         {  -45, -0.785398163397448, -1.0000000000000000 },
  43         {    0,  0.000000000000000,  0.0000000000000000 },
  44         {   30,  0.523598775598299,  0.5773502691896258 },
  45         {   45,  0.785398163397448,  1.0000000000000000 },
  46         {   60,  1.047197551196598,  1.7320508075688773 },
  47         {  120,  2.094395102393195, -1.7320508075688773 },
  48         {  135,  2.356194490192345, -1.0000000000000000 },
  49         {  150,  2.617993877991494, -0.5773502691896258 },
  50         {  180,  3.141592653589793,  0.0000000000000000 },
  51         {  360,  6.283185307179586,  0.0000000000000000 }
  52 };
  53
  54 /*
  55  * tan(3)
  56  */
  57 ATF_TC(tan_angles);
  58 ATF_TC_HEAD(tan_angles, tc)
  59 {
  60         atf_tc_set_md_var(tc, "descr", "Test some selected angles");
  61 }
  62
  63 ATF_TC_BODY(tan_angles, tc)
  64 {
  65         const double eps = 1.0e-14;
  66         size_t i;
  67
  68         for (i = 0; i < __arraycount(angles); i++) {
  69
  70                 if (fabs(tan(angles[i].x) - angles[i].y) > eps)
  71                         atf_tc_fail_nonfatal("tan(%d deg) != %0.01f",
  72                             angles[i].angle, angles[i].y);
  73         }
  74 }
  75
  76 ATF_TC(tan_nan);
  77 ATF_TC_HEAD(tan_nan, tc)
  78 {
  79         atf_tc_set_md_var(tc, "descr", "Test tan(NaN) == NaN");
  80 }
  81
  82 ATF_TC_BODY(tan_nan, tc)
  83 {
  84 #ifndef __vax__
  85         const double x = 0.0L / 0.0L;
  86
  87         ATF_CHECK(isnan(x) != 0);
  88         ATF_CHECK(isnan(tan(x)) != 0);
  89 #endif
  90 }
  91
  92 ATF_TC(tan_inf_neg);
  93 ATF_TC_HEAD(tan_inf_neg, tc)
  94 {
  95         atf_tc_set_md_var(tc, "descr", "Test tan(-Inf) == NaN");
  96 }
  97
  98 ATF_TC_BODY(tan_inf_neg, tc)
  99 {
 100 #ifndef __vax__
 101         const double x = -1.0L / 0.0L;
 102
 103         ATF_CHECK(isnan(tan(x)) != 0);
 104 #endif
 105 }
 106
 107 ATF_TC(tan_inf_pos);
 108 ATF_TC_HEAD(tan_inf_pos, tc)
 109 {
 110         atf_tc_set_md_var(tc, "descr", "Test tan(+Inf) == NaN");
 111 }
 112
 113 ATF_TC_BODY(tan_inf_pos, tc)
 114 {
 115 #ifndef __vax__
 116         const double x = 1.0L / 0.0L;
 117
 118         ATF_CHECK(isnan(tan(x)) != 0);
 119 #endif
 120 }
 121
 122
 123 ATF_TC(tan_zero_neg);
 124 ATF_TC_HEAD(tan_zero_neg, tc)
 125 {
 126         atf_tc_set_md_var(tc, "descr", "Test tan(-0.0) == -0.0");
 127 }
 128
 129 ATF_TC_BODY(tan_zero_neg, tc)
 130 {
 131 #ifndef __vax__
 132         const double x = -0.0L;
 133
 134         ATF_CHECK(tan(x) == x);
 135 #endif
 136 }
 137
 138 ATF_TC(tan_zero_pos);
 139 ATF_TC_HEAD(tan_zero_pos, tc)
 140 {
 141         atf_tc_set_md_var(tc, "descr", "Test tan(+0.0) == +0.0");
 142 }
 143
 144 ATF_TC_BODY(tan_zero_pos, tc)
 145 {
 146 #ifndef __vax__
 147         const double x = 0.0L;
 148
 149         ATF_CHECK(tan(x) == x);
 150 #endif
 151 }
 152
 153 /*
 154  * tanf(3)
 155  */
 156 ATF_TC(tanf_angles);
 157 ATF_TC_HEAD(tanf_angles, tc)
 158 {
 159         atf_tc_set_md_var(tc, "descr", "Test some selected angles");
 160 }
 161
 162 ATF_TC_BODY(tanf_angles, tc)
 163 {
 164 #ifndef __vax__
 165         const float eps = 1.0e-6;
 166         float x, y;
 167         size_t i;
 168
 169         for (i = 0; i < __arraycount(angles); i++) {
 170
 171                 x = angles[i].x;
 172                 y = angles[i].y;
 173
 174                 if (fabsf(tanf(x) - y) > eps)
 175                         atf_tc_fail_nonfatal("tanf(%d deg) != %0.01f",
 176                             angles[i].angle, angles[i].y);
 177         }
 178 #endif
 179 }
 180
 181 ATF_TC(tanf_nan);
 182 ATF_TC_HEAD(tanf_nan, tc)
 183 {
 184         atf_tc_set_md_var(tc, "descr", "Test tanf(NaN) == NaN");
 185 }
 186
 187 ATF_TC_BODY(tanf_nan, tc)
 188 {
 189 #ifndef __vax__
 190         const float x = 0.0L / 0.0L;
 191
 192         ATF_CHECK(isnan(x) != 0);
 193         ATF_CHECK(isnan(tanf(x)) != 0);
 194 #endif
 195 }
 196
 197 ATF_TC(tanf_inf_neg);
 198 ATF_TC_HEAD(tanf_inf_neg, tc)
 199 {
 200         atf_tc_set_md_var(tc, "descr", "Test tanf(-Inf) == NaN");
 201 }
 202
 203 ATF_TC_BODY(tanf_inf_neg, tc)
 204 {
 205 #ifndef __vax__
 206         const float x = -1.0L / 0.0L;
 207
 208         if (isnan(tanf(x)) == 0) {
 209                 atf_tc_expect_fail("PR lib/45362");
 210                 atf_tc_fail("tanf(-Inf) != NaN");
 211         }
 212 #endif
 213 }
 214
 215 ATF_TC(tanf_inf_pos);
 216 ATF_TC_HEAD(tanf_inf_pos, tc)
 217 {
 218         atf_tc_set_md_var(tc, "descr", "Test tanf(+Inf) == NaN");
 219 }
 220
 221 ATF_TC_BODY(tanf_inf_pos, tc)
 222 {
 223 #ifndef __vax__
 224         const float x = 1.0L / 0.0L;
 225
 226         if (isnan(tanf(x)) == 0) {
 227                 atf_tc_expect_fail("PR lib/45362");
 228                 atf_tc_fail("tanf(+Inf) != NaN");
 229         }
 230 #endif
 231 }
 232
 233
 234 ATF_TC(tanf_zero_neg);
 235 ATF_TC_HEAD(tanf_zero_neg, tc)
 236 {
 237         atf_tc_set_md_var(tc, "descr", "Test tanf(-0.0) == -0.0");
 238 }
 239
 240 ATF_TC_BODY(tanf_zero_neg, tc)
 241 {
 242 #ifndef __vax__
 243         const float x = -0.0L;
 244
 245         ATF_CHECK(tanf(x) == x);
 246 #endif
 247 }
 248
 249 ATF_TC(tanf_zero_pos);
 250 ATF_TC_HEAD(tanf_zero_pos, tc)
 251 {
 252         atf_tc_set_md_var(tc, "descr", "Test tanf(+0.0) == +0.0");
 253 }
 254
 255 ATF_TC_BODY(tanf_zero_pos, tc)
 256 {
 257 #ifndef __vax__
 258         const float x = 0.0L;
 259
 260         ATF_CHECK(tanf(x) == x);
 261 #endif
 262 }
 263
 264 ATF_TP_ADD_TCS(tp)
 265 {
 266
 267         ATF_TP_ADD_TC(tp, tan_angles);
 268         ATF_TP_ADD_TC(tp, tan_nan);
 269         ATF_TP_ADD_TC(tp, tan_inf_neg);
 270         ATF_TP_ADD_TC(tp, tan_inf_pos);
 271         ATF_TP_ADD_TC(tp, tan_zero_neg);
 272         ATF_TP_ADD_TC(tp, tan_zero_pos);
 273
 274         ATF_TP_ADD_TC(tp, tanf_angles);
 275         ATF_TP_ADD_TC(tp, tanf_nan);
 276         ATF_TP_ADD_TC(tp, tanf_inf_neg);
 277         ATF_TP_ADD_TC(tp, tanf_inf_pos);
 278         ATF_TP_ADD_TC(tp, tanf_zero_neg);
 279         ATF_TP_ADD_TC(tp, tanf_zero_pos);
 280
 281         return atf_no_error();
 282 }