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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _FENV_H
#define _FENV_H
#include <sys/feature_tests.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Rounding modes
*/
#if defined(__sparc)
#define FE_TONEAREST 0
#define FE_TOWARDZERO 1
#define FE_UPWARD 2
#define FE_DOWNWARD 3
#elif defined(__i386) || defined(__amd64)
#define FE_TONEAREST 0
#define FE_DOWNWARD 1
#define FE_UPWARD 2
#define FE_TOWARDZERO 3
#endif
extern int fegetround(void);
extern int fesetround(int);
#if (defined(__i386) || defined(__amd64)) && \
(!defined(_STRICT_STDC) || defined(__EXTENSIONS__))
#define FE_FLTPREC 0
#define FE_DBLPREC 2
#define FE_LDBLPREC 3
extern int fegetprec(void);
extern int fesetprec(int);
#endif
/*
* Exception flags
*/
#if defined(__sparc)
#define FE_INEXACT 0x01
#define FE_DIVBYZERO 0x02
#define FE_UNDERFLOW 0x04
#define FE_OVERFLOW 0x08
#define FE_INVALID 0x10
#define FE_ALL_EXCEPT 0x1f
#elif defined(__i386) || defined(__amd64)
#define FE_INVALID 0x01
#define FE_DIVBYZERO 0x04
#define FE_OVERFLOW 0x08
#define FE_UNDERFLOW 0x10
#define FE_INEXACT 0x20
#define FE_ALL_EXCEPT 0x3d
#endif
typedef int fexcept_t;
extern int feclearexcept(int);
extern int feraiseexcept(int);
extern int fetestexcept(int);
extern int fegetexceptflag(fexcept_t *, int);
extern int fesetexceptflag(const fexcept_t *, int);
#if !defined(_STRICT_STDC) || defined(__EXTENSIONS__)
/*
* Exception handling extensions
*/
#define FEX_NOHANDLER -1
#define FEX_NONSTOP 0
#define FEX_ABORT 1
#define FEX_SIGNAL 2
#define FEX_CUSTOM 3
#define FEX_INEXACT 0x001
#define FEX_DIVBYZERO 0x002
#define FEX_UNDERFLOW 0x004
#define FEX_OVERFLOW 0x008
#define FEX_INV_ZDZ 0x010
#define FEX_INV_IDI 0x020
#define FEX_INV_ISI 0x040
#define FEX_INV_ZMI 0x080
#define FEX_INV_SQRT 0x100
#define FEX_INV_SNAN 0x200
#define FEX_INV_INT 0x400
#define FEX_INV_CMP 0x800
#define FEX_INVALID 0xff0
#define FEX_COMMON (FEX_INVALID | FEX_DIVBYZERO | FEX_OVERFLOW)
#define FEX_ALL (FEX_COMMON | FEX_UNDERFLOW | FEX_INEXACT)
#define FEX_NONE 0
#define FEX_NUM_EXC 12
/* structure to hold a numeric value in any format used by the FPU */
typedef struct {
enum fex_nt {
fex_nodata = 0,
fex_int = 1,
fex_llong = 2,
fex_float = 3,
fex_double = 4,
fex_ldouble = 5
} type;
union {
int i;
#if !defined(_STRICT_STDC) && !defined(_NO_LONGLONG) || defined(_STDC_C99) || \
defined(__C99FEATURES__)
long long l;
#else
struct {
int l[2];
} l;
#endif
float f;
double d;
long double q;
} val;
} fex_numeric_t;
/* structure to supply information about an exception to a custom handler */
typedef struct {
enum fex_op {
fex_add = 0,
fex_sub = 1,
fex_mul = 2,
fex_div = 3,
fex_sqrt = 4,
fex_cnvt = 5,
fex_cmp = 6,
fex_other = 7
} op; /* operation that caused the exception */
int flags; /* flags to be set */
fex_numeric_t op1, op2, res; /* operands and result */
} fex_info_t;
typedef struct fex_handler_data {
int __mode;
void (*__handler)();
} fex_handler_t[FEX_NUM_EXC];
extern int fex_get_handling(int);
extern int fex_set_handling(int, int, void (*)());
extern void fex_getexcepthandler(fex_handler_t *, int);
extern void fex_setexcepthandler(const fex_handler_t *, int);
#ifdef __STDC__
#include <stdio_tag.h>
#ifndef _FILEDEFED
#define _FILEDEFED
typedef __FILE FILE;
#endif
#endif
extern FILE *fex_get_log(void);
extern int fex_set_log(FILE *);
extern int fex_get_log_depth(void);
extern int fex_set_log_depth(int);
extern void fex_log_entry(const char *);
#define __fex_handler_t fex_handler_t
#else
typedef struct {
int __mode;
void (*__handler)();
} __fex_handler_t[12];
#endif /* !defined(_STRICT_STDC) || defined(__EXTENSIONS__) */
/*
* Environment as a whole
*/
typedef struct {
__fex_handler_t __handlers;
unsigned long __fsr;
} fenv_t;
#ifdef __STDC__
extern const fenv_t __fenv_dfl_env;
#else
extern fenv_t __fenv_dfl_env;
#endif
#define FE_DFL_ENV (&__fenv_dfl_env)
extern int fegetenv(fenv_t *);
extern int fesetenv(const fenv_t *);
extern int feholdexcept(fenv_t *);
extern int feupdateenv(const fenv_t *);
#if !defined(_STRICT_STDC) || defined(__EXTENSIONS__)
extern void fex_merge_flags(const fenv_t *);
#endif
#ifdef __cplusplus
}
#endif
#endif /* _FENV_H */
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