1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
23 */
24 /*
25 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 #ifndef _FENV_H
30 #define _FENV_H
31
32 #include <sys/feature_tests.h>
33
34 #ifdef __cplusplus
35 extern "C" {
36 #endif
37
38 /*
39 * Rounding modes
40 */
41 #if defined(__sparc)
42
43 #define FE_TONEAREST 0
44 #define FE_TOWARDZERO 1
45 #define FE_UPWARD 2
46 #define FE_DOWNWARD 3
47
48 #elif defined(__i386) || defined(__amd64)
49
50 #define FE_TONEAREST 0
51 #define FE_DOWNWARD 1
52 #define FE_UPWARD 2
53 #define FE_TOWARDZERO 3
54
55 #endif
56
57 extern int fegetround(void);
58 extern int fesetround(int);
59
60 #if (defined(__i386) || defined(__amd64)) && \
61 (!defined(_STRICT_STDC) || defined(__EXTENSIONS__))
62
63 #define FE_FLTPREC 0
64 #define FE_DBLPREC 2
65 #define FE_LDBLPREC 3
66
67 extern int fegetprec(void);
68 extern int fesetprec(int);
69
70 #endif
71
72 /*
73 * Exception flags
74 */
75 #if defined(__sparc)
76
77 #define FE_INEXACT 0x01
78 #define FE_DIVBYZERO 0x02
79 #define FE_UNDERFLOW 0x04
80 #define FE_OVERFLOW 0x08
81 #define FE_INVALID 0x10
82 #define FE_ALL_EXCEPT 0x1f
83
84 #elif defined(__i386) || defined(__amd64)
85
86 #define FE_INVALID 0x01
87 #define FE_DIVBYZERO 0x04
88 #define FE_OVERFLOW 0x08
89 #define FE_UNDERFLOW 0x10
90 #define FE_INEXACT 0x20
91 #define FE_ALL_EXCEPT 0x3d
92
93 #endif
94
95 typedef int fexcept_t;
96
97 extern int feclearexcept(int);
98 extern int feraiseexcept(int);
99 extern int fetestexcept(int);
100 extern int fegetexceptflag(fexcept_t *, int);
101 extern int fesetexceptflag(const fexcept_t *, int);
102
103 #if !defined(_STRICT_STDC) || defined(__EXTENSIONS__)
104
105 /*
106 * Exception handling extensions
107 */
108 #define FEX_NOHANDLER -1
109 #define FEX_NONSTOP 0
110 #define FEX_ABORT 1
111 #define FEX_SIGNAL 2
112 #define FEX_CUSTOM 3
113
114 #define FEX_INEXACT 0x001
115 #define FEX_DIVBYZERO 0x002
116 #define FEX_UNDERFLOW 0x004
117 #define FEX_OVERFLOW 0x008
118 #define FEX_INV_ZDZ 0x010
119 #define FEX_INV_IDI 0x020
120 #define FEX_INV_ISI 0x040
121 #define FEX_INV_ZMI 0x080
122 #define FEX_INV_SQRT 0x100
123 #define FEX_INV_SNAN 0x200
124 #define FEX_INV_INT 0x400
125 #define FEX_INV_CMP 0x800
126 #define FEX_INVALID 0xff0
127 #define FEX_COMMON (FEX_INVALID | FEX_DIVBYZERO | FEX_OVERFLOW)
128 #define FEX_ALL (FEX_COMMON | FEX_UNDERFLOW | FEX_INEXACT)
129 #define FEX_NONE 0
130
131 #define FEX_NUM_EXC 12
132
133 /* structure to hold a numeric value in any format used by the FPU */
134 typedef struct {
135 enum fex_nt {
136 fex_nodata = 0,
137 fex_int = 1,
138 fex_llong = 2,
139 fex_float = 3,
140 fex_double = 4,
141 fex_ldouble = 5
142 } type;
143 union {
144 int i;
145 #if !defined(_STRICT_STDC) && !defined(_NO_LONGLONG) || defined(_STDC_C99) || \
146 defined(__C99FEATURES__)
147 long long l;
148 #else
149 struct {
150 int l[2];
151 } l;
152 #endif
153 float f;
154 double d;
155 long double q;
156 } val;
157 } fex_numeric_t;
158
159 /* structure to supply information about an exception to a custom handler */
160 typedef struct {
161 enum fex_op {
162 fex_add = 0,
163 fex_sub = 1,
164 fex_mul = 2,
165 fex_div = 3,
166 fex_sqrt = 4,
167 fex_cnvt = 5,
168 fex_cmp = 6,
169 fex_other = 7
170 } op; /* operation that caused the exception */
171 int flags; /* flags to be set */
172 fex_numeric_t op1, op2, res; /* operands and result */
173 } fex_info_t;
174
175 typedef struct fex_handler_data {
176 int __mode;
177 void (*__handler)();
178 } fex_handler_t[FEX_NUM_EXC];
179
180 extern int fex_get_handling(int);
181 extern int fex_set_handling(int, int, void (*)());
182
183 extern void fex_getexcepthandler(fex_handler_t *, int);
184 extern void fex_setexcepthandler(const fex_handler_t *, int);
185
186 #ifdef __STDC__
187 #include <stdio_tag.h>
188 #ifndef _FILEDEFED
189 #define _FILEDEFED
190 typedef __FILE FILE;
191 #endif
192 #endif
193 extern FILE *fex_get_log(void);
194 extern int fex_set_log(FILE *);
195 extern int fex_get_log_depth(void);
196 extern int fex_set_log_depth(int);
197 extern void fex_log_entry(const char *);
198
199 #define __fex_handler_t fex_handler_t
200
201 #else
202
203 typedef struct {
204 int __mode;
205 void (*__handler)();
206 } __fex_handler_t[12];
207
208 #endif /* !defined(_STRICT_STDC) || defined(__EXTENSIONS__) */
209
210 /*
211 * Environment as a whole
212 */
213 typedef struct {
214 __fex_handler_t __handlers;
215 unsigned long __fsr;
216 } fenv_t;
217
218 #ifdef __STDC__
219 extern const fenv_t __fenv_dfl_env;
220 #else
221 extern fenv_t __fenv_dfl_env;
222 #endif
223
224 #define FE_DFL_ENV (&__fenv_dfl_env)
225
226 extern int fegetenv(fenv_t *);
227 extern int fesetenv(const fenv_t *);
228 extern int feholdexcept(fenv_t *);
229 extern int feupdateenv(const fenv_t *);
230
231 #if !defined(_STRICT_STDC) || defined(__EXTENSIONS__)
232 extern void fex_merge_flags(const fenv_t *);
233 #endif
234
235 #ifdef __cplusplus
236 }
237 #endif
238
239 #endif /* _FENV_H */