File: tst-strtod-round.c

package info (click to toggle)
glibc 2.24-11+deb9u4
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 225,852 kB
  • sloc: ansic: 996,505; asm: 261,827; sh: 10,484; makefile: 9,856; cpp: 4,169; python: 3,971; perl: 2,254; awk: 1,753; pascal: 1,521; yacc: 291; sed: 80
file content (216 lines) | stat: -rw-r--r-- 7,075 bytes parent folder | download | duplicates (4)
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
/* Test for correct rounding of results of strtod and related
   functions.
   Copyright (C) 2012-2016 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/>.  */

/* Defining _LIBC_TEST ensures long double math functions are
   declared in the headers.  */
#define _LIBC_TEST 1
#include <fenv.h>
#include <float.h>
#include <math.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math-tests.h>

#include "tst-strtod.h"

#define _CONCAT(a, b) a ## b
#define CONCAT(a, b) _CONCAT (a, b)

#if LDBL_MANT_DIG == 106 && LDBL_MAX_EXP == 1024
/* This is a stupid hack for IBM long double.  This test ignores
   inexact values for long double due to the limitations of the
   format.  This ensures rounding tests are ignored.  */
# undef ROUNDING_TESTS_long_double
# define ROUNDING_TESTS_long_double(x) 0
#endif

/* Generator to create an FTYPE member variabled named FSUF
   used to populate struct member variables.  */
#define FTYPE_MEMBER(FSUF, FTYPE, FTOSTR, FTOSTRM, LSUF, CSUF)  \
       FTYPE FSUF;

/* Likewise, but each member is of type bool.  */
#define BOOL_MEMBER(FSUF, FTYPE, FTOSTR, FTOSTRM, LSUF, CSUF)  \
       bool FSUF;

#define STRUCT_FOREACH_FLOAT_FTYPE GEN_TEST_STRTOD_FOREACH (FTYPE_MEMBER)
#define STRUCT_FOREACH_FLOAT_BOOL GEN_TEST_STRTOD_FOREACH (BOOL_MEMBER)

/* Define the long double choose (CHOOSE_ld) macro
   to select the appropriate generated long double
   value from the generated test data.  */
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
/* This is for the long double == double format.  */
# define CHOOSE_ld(f,d,...) d
#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && LDBL_MIN_EXP == -16381
/* This is for the Intel extended float format.  */
# define CHOOSE_ld(f,d,ld64i,...) ld64i
#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && LDBL_MIN_EXP == -16382
/* This is for the Motorola extended float format.  */
# define CHOOSE_ld(f,d,ld64i,ld64m,...) ld64m
#elif LDBL_MANT_DIG == 106 && LDBL_MAX_EXP == 1024
/* This is for the IBM extended double format.  */
# define CHOOSE_ld(f,d,ld64i,ld64m,ld106,...) ld106
#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
/* This is for the IEEE binary128 format.  */
# define CHOOSE_ld(f,d,ld64i,ld64m,ld106,ld113,...) ld113
#else
# error "unknown long double format"
#endif

/* Add type specific choosing macros below.  */
#define CHOOSE_f(f,...) f
#define CHOOSE_d(f,d,...) d
/* long double is special, and handled above.  */

/* Selector for expected result field of a given type.  */
#define _ENTRY(FSUF, FTYPE, FTOSTR, FTOSTRM, LSUF, CSUF, ...)  \
  CONCAT (CHOOSE_ ## FSUF (__VA_ARGS__), LSUF),
#define ENTRY(...) \
  GEN_TEST_STRTOD_FOREACH (_ENTRY, __VA_ARGS__)

/* Selector for boolean exact tag of expected results.  */
#define _XNTRY(FSUF, FTYPE, FTOSTR, FTOSTRM, LSUF, CSUF, ...)  \
  CHOOSE_ ## FSUF (__VA_ARGS__),
#define XNTRY(...) \
  GEN_TEST_STRTOD_FOREACH (_XNTRY, __VA_ARGS__)

/* This is hacky way around the seemingly unavoidable macro
   expansion of the INFINITY or HUGE_VAL like macros in the
   above.  It is assumed the compiler will implicitly convert
   the infinity correctly.  */
#define INF INFINITY + 0.0

/* This macro is used in conjunction with the output from the
   gen-tst-strtod-round utility to select the appropriately
   rounded long double value for a given format.  */
#define TEST(s,						\
	     fx, fd, fn, fz, fu,			\
	     dx, dd, dn, dz, du,			\
	     ld64ix, ld64id, ld64in, ld64iz, ld64iu,	\
	     ld64mx, ld64md, ld64mn, ld64mz, ld64mu,	\
	     ld106x, ld106d, ld106n, ld106z, ld106u,	\
	     ld113x, ld113d, ld113n, ld113z, ld113u)	\
  {							\
    s,							\
    { XNTRY (fx, dx, ld64ix, ld64mx, ld106x, ld113x) },	\
    {							\
    { ENTRY (fn, dn, ld64in, ld64mn, ld106n, ld113n) },	\
    { ENTRY (fd, dd, ld64id, ld64md, ld106d, ld113d) },	\
    { ENTRY (fz, dz, ld64iz, ld64mz, ld106z, ld113z) },	\
    { ENTRY (fu, du, ld64iu, ld64mu, ld106u, ld113u) }	\
    }							\
  }

struct test_exactness
  {
  STRUCT_FOREACH_FLOAT_BOOL
  };

struct test_results
  {
  STRUCT_FOREACH_FLOAT_FTYPE
  };

struct test {
  const char *s;
  struct test_exactness exact;
  struct test_results r[4];
};

/* Include the generated test data.  */
#include "tst-strtod-round-data.h"

#define GEN_ONE_TEST(FSUF, FTYPE, FTOSTR, FTOSTRM, LSUF, CSUF)	\
{								\
  FTYPE f = strto ## FSUF (s, NULL);				\
  if (f != expected->FSUF					\
      || (copysign ## CSUF) (1.0 ## LSUF, f)			\
	 != (copysign ## CSUF) (1.0 ## LSUF, expected->FSUF))	\
    {								\
      char efstr[FSTRLENMAX];					\
      char fstr[FSTRLENMAX];					\
      FTOSTR (efstr, FSTRLENMAX, "%" FTOSTRM "a", expected->FSUF); \
      FTOSTR (fstr, FSTRLENMAX, "%" FTOSTRM "a", f);		\
      printf ("strto" #FSUF " (%s) returned %s not %s"		\
	      " (%s)\n", s, fstr, efstr, mode_name);		\
      if (ROUNDING_TESTS (FTYPE, rnd_mode) || exact->FSUF)	\
	result = 1;						\
      else							\
	printf ("ignoring this inexact result\n");		\
    }								\
}

static int
test_in_one_mode (const char *s, const struct test_results *expected,
		  const struct test_exactness *exact, const char *mode_name,
		  int rnd_mode)
{
  int result = 0;
  GEN_TEST_STRTOD_FOREACH (GEN_ONE_TEST)
  return result;
}

static const struct fetestmodes
  {
  const char *mode_name;
  int rnd_mode;
  int rnd_i; /* Corresponding index into r array of struct test.  */
  } modes[] = {
    { "default rounding mode", FE_TONEAREST, 0 },
#ifdef FE_DOWNWARD
    { "FE_DOWNWARD", FE_DOWNWARD, 1 },
#endif
#ifdef FE_TOWARDZERO
    { "FE_TOWARDZERO", FE_TOWARDZERO, 2 },
#endif
#ifdef FE_UPWARD
    { "FE_UPWARD", FE_UPWARD, 3 },
#endif
    {}
};

static int
do_test (void)
{
  int save_round_mode __attribute__ ((unused)) = fegetround ();
  int result = 0;
  for (size_t i = 0; i < sizeof (tests) / sizeof (tests[0]); i++)
    {
      result |= test_in_one_mode (tests[i].s, &tests[i].r[modes[0].rnd_i],
				  &tests[i].exact, modes[0].mode_name,
				  modes[0].rnd_mode);
      for (const struct fetestmodes *m = &modes[1]; m->mode_name != NULL; m++)
	{
	  if (!fesetround (m->rnd_mode))
	    {
	      result |= test_in_one_mode (tests[i].s, &tests[i].r[m->rnd_i],
					  &tests[i].exact, m->mode_name,
					  m->rnd_mode);
	      fesetround (save_round_mode);
	    }
	}
    }
  return result;
}

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