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 #ifndef __P 39 #ifdef __STDC__ 40 #define __P(p) p 41 #else 42 #define __P(p) () 43 #endif 44 #endif /* !defined(__P) */ 45 46 /* 47 * Rounding modes 48 */ 49 #if defined(__sparc) 50 51 #define FE_TONEAREST 0 52 #define FE_TOWARDZERO 1 53 #define FE_UPWARD 2 54 #define FE_DOWNWARD 3 55 56 #elif defined(__i386) || defined(__amd64) 57 58 #define FE_TONEAREST 0 59 #define FE_DOWNWARD 1 60 #define FE_UPWARD 2 61 #define FE_TOWARDZERO 3 62 63 #endif 64 65 extern int fegetround __P((void)); 66 extern int fesetround __P((int)); 67 68 #if (defined(__i386) || defined(__amd64)) && \ 69 (!defined(_STRICT_STDC) || defined(__EXTENSIONS__)) 70 71 #define FE_FLTPREC 0 72 #define FE_DBLPREC 2 73 #define FE_LDBLPREC 3 74 75 extern int fegetprec __P((void)); 76 extern int fesetprec __P((int)); 77 78 #endif 79 80 /* 81 * Exception flags 82 */ 83 #if defined(__sparc) 84 85 #define FE_INEXACT 0x01 86 #define FE_DIVBYZERO 0x02 87 #define FE_UNDERFLOW 0x04 88 #define FE_OVERFLOW 0x08 89 #define FE_INVALID 0x10 90 #define FE_ALL_EXCEPT 0x1f 91 92 #elif defined(__i386) || defined(__amd64) 93 94 #define FE_INVALID 0x01 95 #define FE_DIVBYZERO 0x04 96 #define FE_OVERFLOW 0x08 97 #define FE_UNDERFLOW 0x10 98 #define FE_INEXACT 0x20 99 #define FE_ALL_EXCEPT 0x3d 100 101 #endif 102 103 typedef int fexcept_t; 104 105 extern int feclearexcept __P((int)); 106 extern int feraiseexcept __P((int)); 107 extern int fetestexcept __P((int)); 108 extern int fegetexceptflag __P((fexcept_t *, int)); 109 extern int fesetexceptflag __P((const fexcept_t *, int)); 110 111 #if !defined(_STRICT_STDC) || defined(__EXTENSIONS__) 112 113 /* 114 * Exception handling extensions 115 */ 116 #define FEX_NOHANDLER -1 117 #define FEX_NONSTOP 0 118 #define FEX_ABORT 1 119 #define FEX_SIGNAL 2 120 #define FEX_CUSTOM 3 121 122 #define FEX_INEXACT 0x001 123 #define FEX_DIVBYZERO 0x002 124 #define FEX_UNDERFLOW 0x004 125 #define FEX_OVERFLOW 0x008 126 #define FEX_INV_ZDZ 0x010 127 #define FEX_INV_IDI 0x020 128 #define FEX_INV_ISI 0x040 129 #define FEX_INV_ZMI 0x080 130 #define FEX_INV_SQRT 0x100 131 #define FEX_INV_SNAN 0x200 132 #define FEX_INV_INT 0x400 133 #define FEX_INV_CMP 0x800 134 #define FEX_INVALID 0xff0 135 #define FEX_COMMON (FEX_INVALID | FEX_DIVBYZERO | FEX_OVERFLOW) 136 #define FEX_ALL (FEX_COMMON | FEX_UNDERFLOW | FEX_INEXACT) 137 #define FEX_NONE 0 138 139 #define FEX_NUM_EXC 12 140 141 /* structure to hold a numeric value in any format used by the FPU */ 142 typedef struct { 143 enum fex_nt { 144 fex_nodata = 0, 145 fex_int = 1, 146 fex_llong = 2, 147 fex_float = 3, 148 fex_double = 4, 149 fex_ldouble = 5 150 } type; 151 union { 152 int i; 153 #if !defined(_STRICT_STDC) && !defined(_NO_LONGLONG) || defined(_STDC_C99) || \ 154 defined(__C99FEATURES__) 155 long long l; 156 #else 157 struct { 158 int l[2]; 159 } l; 160 #endif 161 float f; 162 double d; 163 long double q; 164 } val; 165 } fex_numeric_t; 166 167 /* structure to supply information about an exception to a custom handler */ 168 typedef struct { 169 enum fex_op { 170 fex_add = 0, 171 fex_sub = 1, 172 fex_mul = 2, 173 fex_div = 3, 174 fex_sqrt = 4, 175 fex_cnvt = 5, 176 fex_cmp = 6, 177 fex_other = 7 178 } op; /* operation that caused the exception */ 179 int flags; /* flags to be set */ 180 fex_numeric_t op1, op2, res; /* operands and result */ 181 } fex_info_t; 182 183 typedef struct fex_handler_data { 184 int __mode; 185 void (*__handler)(); 186 } fex_handler_t[FEX_NUM_EXC]; 187 188 extern int fex_get_handling __P((int)); 189 extern int fex_set_handling __P((int, int, void (*)())); 190 191 extern void fex_getexcepthandler __P((fex_handler_t *, int)); 192 extern void fex_setexcepthandler __P((const fex_handler_t *, int)); 193 194 #ifdef __STDC__ 195 #include <stdio_tag.h> 196 #ifndef _FILEDEFED 197 #define _FILEDEFED 198 typedef __FILE FILE; 199 #endif 200 #endif 201 extern FILE *fex_get_log __P((void)); 202 extern int fex_set_log __P((FILE *)); 203 extern int fex_get_log_depth __P((void)); 204 extern int fex_set_log_depth __P((int)); 205 extern void fex_log_entry __P((const char *)); 206 207 #define __fex_handler_t fex_handler_t 208 209 #else 210 211 typedef struct { 212 int __mode; 213 void (*__handler)(); 214 } __fex_handler_t[12]; 215 216 #endif /* !defined(_STRICT_STDC) || defined(__EXTENSIONS__) */ 217 218 /* 219 * Environment as a whole 220 */ 221 typedef struct { 222 __fex_handler_t __handlers; 223 unsigned long __fsr; 224 } fenv_t; 225 226 #ifdef __STDC__ 227 extern const fenv_t __fenv_dfl_env; 228 #else 229 extern fenv_t __fenv_dfl_env; 230 #endif 231 232 #define FE_DFL_ENV (&__fenv_dfl_env) 233 234 extern int fegetenv __P((fenv_t *)); 235 extern int fesetenv __P((const fenv_t *)); 236 extern int feholdexcept __P((fenv_t *)); 237 extern int feupdateenv __P((const fenv_t *)); 238 239 #if !defined(_STRICT_STDC) || defined(__EXTENSIONS__) 240 extern void fex_merge_flags __P((const fenv_t *)); 241 #endif 242 243 #ifdef __cplusplus 244 } 245 #endif 246 247 #endif /* _FENV_H */ 248