aboutsummaryrefslogtreecommitdiff
path: root/math/test-fenvinline.c
blob: b02cefd7f8043835d76d6c3943cc2c10ed51890b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
/* Test for fenv inline implementations.
   Copyright (C) 2015 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif

/* To make sure the fenv inline function are used.  */
#undef __NO_MATH_INLINES

#include <fenv.h>
#include <stdio.h>
#include <math-tests.h>

/*
  Since not all architectures might define all exceptions, we define
  a private set and map accordingly.
*/
#define NO_EXC 0
#define INEXACT_EXC 0x1
#define DIVBYZERO_EXC 0x2
#define UNDERFLOW_EXC 0x04
#define OVERFLOW_EXC 0x08
#define INVALID_EXC 0x10
#define ALL_EXC \
        (INEXACT_EXC | DIVBYZERO_EXC | UNDERFLOW_EXC | OVERFLOW_EXC | \
         INVALID_EXC)
static int count_errors;

#if FE_ALL_EXCEPT
static void
test_single_exception_fp_int (int exception,
			      int exc_flag,
			      int fe_flag,
			      const char *flag_name)
{
  if (exception & exc_flag)
    {
      if (fetestexcept (fe_flag))
        printf ("  Pass: Exception \"%s\" is set\n", flag_name);
      else
        {
          printf ("  Fail: Exception \"%s\" is not set\n", flag_name);
          ++count_errors;
        }
    }
  else
    {
      if (fetestexcept (fe_flag))
        {
          printf ("  Fail: Exception \"%s\" is set\n", flag_name);
          ++count_errors;
        }
      else
        printf ("  Pass: Exception \"%s\" is not set\n", flag_name);
    }
}
/* Test whether a given exception was raised.  */
static void
test_single_exception_fp_double (int exception,
				 int exc_flag,
				 double fe_flag,
				 const char *flag_name)
{
  if (exception & exc_flag)
    {
      if (fetestexcept (fe_flag))
        printf ("  Pass: Exception \"%s\" is set\n", flag_name);
      else
        {
          printf ("  Fail: Exception \"%s\" is not set\n", flag_name);
          ++count_errors;
        }
    }
  else
    {
      if (fetestexcept (fe_flag))
        {
          printf ("  Fail: Exception \"%s\" is set\n", flag_name);
          ++count_errors;
        }
      else
        printf ("  Pass: Exception \"%s\" is not set\n", flag_name);
    }
}
#endif

static void
test_exceptions (const char *test_name, int exception)
{
  printf ("Test: %s\n", test_name);
#ifdef FE_DIVBYZERO
  test_single_exception_fp_double (exception, DIVBYZERO_EXC, FE_DIVBYZERO,
				   "DIVBYZERO");
#endif
#ifdef FE_INVALID
  test_single_exception_fp_double (exception, INVALID_EXC, FE_INVALID,
				   "INVALID");
#endif
#ifdef FE_INEXACT
  test_single_exception_fp_double (exception, INEXACT_EXC, FE_INEXACT,
				   "INEXACT");
#endif
#ifdef FE_UNDERFLOW
  test_single_exception_fp_double (exception, UNDERFLOW_EXC, FE_UNDERFLOW,
				   "UNDERFLOW");
#endif
#ifdef FE_OVERFLOW
  test_single_exception_fp_double (exception, OVERFLOW_EXC, FE_OVERFLOW,
				   "OVERFLOW");
#endif
}

static void
test_exceptionflag (void)
{
  printf ("Test: fegetexceptionflag (FE_ALL_EXCEPT)\n");
#if FE_ALL_EXCEPT
  fexcept_t excepts;

  feclearexcept (FE_ALL_EXCEPT);

  feraiseexcept (FE_INVALID);
  fegetexceptflag (&excepts, FE_ALL_EXCEPT);

  feclearexcept (FE_ALL_EXCEPT);
  feraiseexcept (FE_OVERFLOW | FE_INEXACT);

  fesetexceptflag (&excepts, FE_ALL_EXCEPT);

  test_single_exception_fp_int (INVALID_EXC, INVALID_EXC, FE_INVALID,
				"INVALID (int)");
  test_single_exception_fp_int (INVALID_EXC, OVERFLOW_EXC, FE_OVERFLOW,
				"OVERFLOW (int)");
  test_single_exception_fp_int (INVALID_EXC, INEXACT_EXC, FE_INEXACT,
				"INEXACT (int)");

  /* Same test, but using double as argument  */
  feclearexcept (FE_ALL_EXCEPT);

  feraiseexcept (FE_INVALID);
  fegetexceptflag (&excepts, (double)FE_ALL_EXCEPT);

  feclearexcept (FE_ALL_EXCEPT);
  feraiseexcept (FE_OVERFLOW | FE_INEXACT);

  fesetexceptflag (&excepts, (double)FE_ALL_EXCEPT);

  test_single_exception_fp_double (INVALID_EXC, INVALID_EXC, FE_INVALID,
				   "INVALID (double)");
  test_single_exception_fp_double (INVALID_EXC, OVERFLOW_EXC, FE_OVERFLOW,
				   "OVERFLOW (double)");
  test_single_exception_fp_double (INVALID_EXC, INEXACT_EXC, FE_INEXACT,
				   "INEXACT (double)");
#endif
}

static void
test_fesetround (void)
{
#if defined FE_TONEAREST && defined FE_TOWARDZERO
  int res1;
  int res2;

  printf ("Tests for fesetround\n");

  /* The fesetround should not itself cause the test to fail, however it
     should either succeed for both 'int' and 'double' argument, or fail
     for both.  */
  res1 = fesetround ((int) FE_TOWARDZERO);
  res2 = fesetround ((double) FE_TOWARDZERO);
  if (res1 != res2)
    {
      printf ("fesetround (FE_TOWARDZERO) failed: %d, %d\n", res1, res2);
      ++count_errors;
    }

  res1 = fesetround ((int) FE_TONEAREST);
  res2 = fesetround ((double) FE_TONEAREST);
  if (res1 != res2)
    {
      printf ("fesetround (FE_TONEAREST) failed: %d, %d\n", res1, res2);
      ++count_errors;
    }
#endif
}

/* Tests for feenableexcept/fedisableexcept.  */
static void
feenable_test (const char *flag_name, fexcept_t fe_exc)
{
#if FE_ALL_EXCEPT
  int fe_exci = fe_exc;
  double fe_excd = fe_exc;
  int excepts;

  /* First disable all exceptions.  */
  if (fedisableexcept (FE_ALL_EXCEPT) == -1)
    {
      printf ("Test: fedisableexcept (FE_ALL_EXCEPT) failed\n");
      ++count_errors;
      /* If this fails, the other tests don't make sense.  */
      return;
    }

  /* Test for inline macros using integer argument.  */
  excepts = feenableexcept (fe_exci);
  if (!EXCEPTION_ENABLE_SUPPORTED (fe_exci) && excepts == -1)
    {
      printf ("Test: not testing feenableexcept, it isn't implemented.\n");
      return;
    }
  if (excepts == -1)
    {
      printf ("Test: feenableexcept (%s) failed\n", flag_name);
      ++count_errors;
      return;
    }
  if (excepts != 0)
    {
      printf ("Test: feenableexcept (%s) failed, return should be 0, is %x\n",
              flag_name, excepts);
      ++count_errors;
    }

  /* And now disable the exception again.  */
  excepts = fedisableexcept (fe_exc);
  if (excepts == -1)
    {
      printf ("Test: fedisableexcept (%s) failed\n", flag_name);
      ++count_errors;
      return;
    }
  if (excepts != fe_exc)
    {
      printf ("Test: fedisableexcept (%s) failed, return should be 0x%x, is 0x%x\n",
              flag_name, (unsigned int)fe_exc, excepts);
      ++count_errors;
    }

  /* Test for inline macros using double argument.  */
  excepts = feenableexcept (fe_excd);
  if (!EXCEPTION_ENABLE_SUPPORTED (fe_excd) && excepts == -1)
    {
      printf ("Test: not testing feenableexcept, it isn't implemented.\n");
      return;
    }
  if (excepts == -1)
    {
      printf ("Test: feenableexcept (%s) failed\n", flag_name);
      ++count_errors;
      return;
    }
  if (excepts != 0)
    {
      printf ("Test: feenableexcept (%s) failed, return should be 0, is %x\n",
              flag_name, excepts);
      ++count_errors;
    }

  /* And now disable the exception again.  */
  excepts = fedisableexcept (fe_exc);
  if (excepts == -1)
    {
      printf ("Test: fedisableexcept (%s) failed\n", flag_name);
      ++count_errors;
      return;
    }
  if (excepts != fe_exc)
    {
      printf ("Test: fedisableexcept (%s) failed, return should be 0x%x, is 0x%x\n",
              flag_name, (unsigned int)fe_exc, excepts);
      ++count_errors;
    }
#endif
}

static void
test_feenabledisable (void)
{
  printf ("Tests for feenableexcepts/fedisableexcept\n");

  /* We might have some exceptions still set.  */
  feclearexcept (FE_ALL_EXCEPT);

#ifdef FE_DIVBYZERO
  feenable_test ("FE_DIVBYZERO", FE_DIVBYZERO);
#endif
#ifdef FE_INVALID
  feenable_test ("FE_INVALID", FE_INVALID);
#endif
#ifdef FE_INEXACT
  feenable_test ("FE_INEXACT", FE_INEXACT);
#endif
#ifdef FE_UNDERFLOW
  feenable_test ("FE_UNDERFLOW", FE_UNDERFLOW);
#endif
#ifdef FE_OVERFLOW
  feenable_test ("FE_OVERFLOW", FE_OVERFLOW);
#endif
  fesetenv (FE_DFL_ENV);
}

static int
do_test (void)
{
  /* clear all exceptions and test if all are cleared  */
  feclearexcept (FE_ALL_EXCEPT);
  test_exceptions ("feclearexcept (FE_ALL_EXCEPT) clears all exceptions",
                   NO_EXC);

  /* raise all exceptions and test if all are raised  */
  feraiseexcept (FE_ALL_EXCEPT);
  test_exceptions ("feraiseexcept (FE_ALL_EXCEPT) raises all exceptions",
                   ALL_EXC);

  /* Same test, but using double as argument  */
  feclearexcept ((double)FE_ALL_EXCEPT);
  test_exceptions ("feclearexcept ((double)FE_ALL_EXCEPT) clears all exceptions",
                   NO_EXC);

  feraiseexcept ((double)FE_ALL_EXCEPT);
  test_exceptions ("feraiseexcept ((double)FE_ALL_EXCEPT) raises all exceptions",
                   ALL_EXC);

  test_exceptionflag ();

  test_fesetround ();

  test_feenabledisable ();

  return count_errors;
}

#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"