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📄 Block.h(1.96 KB)
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📄 FlexLexer.h(6.73 KB)
📄 _ctype.h(5.98 KB)
📄 _semaphore.h(2.05 KB)
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📄 alias.h(8.51 KB)
📄 ar.h(2.69 KB)
📄 archive.h(51.93 KB)
📄 archive_entry.h(32.79 KB)
📁 arpa
📄 asn1-common.h(2.06 KB)
📄 asn1_err.h(1.07 KB)
📄 assert.h(2.93 KB)
📁 atf-c
📁 atf-c++
📄 atf-c++.hpp(1.49 KB)
📄 atf-c.h(1.5 KB)
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📁 bsm
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📄 calendar.h(1.83 KB)
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📄 camlib.h(7.39 KB)
📄 capsicum_helpers.h(4.33 KB)
📁 casper
📄 cms_asn1.h(27.2 KB)
📄 com_err.h(2.62 KB)
📄 com_right.h(2.8 KB)
📄 complex.h(4.68 KB)
📄 cpio.h(2.4 KB)
📄 crmf_asn1.h(13.31 KB)
📁 crypto
📄 ctype.h(4.59 KB)
📄 curses.h(97.92 KB)
📄 cuse.h(3.26 KB)
📄 db.h(7.49 KB)
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📄 der-protos.h(10.5 KB)
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📁 dev
📄 devctl.h(2.02 KB)
📁 devdctl
📄 devinfo.h(4.52 KB)
📄 devstat.h(5.2 KB)
📄 dialog.h(37.7 KB)
📄 digest_asn1.h(17.01 KB)
📄 dirent.h(4.13 KB)
📄 dlfcn.h(5.04 KB)
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📄 dlg_config.h(2.64 KB)
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📁 edit
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📄 elf-hints.h(1.96 KB)
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📄 err.h(2.98 KB)
📄 errno.h(8.29 KB)
📄 eti.h(2.9 KB)
📄 execinfo.h(1.92 KB)
📄 fcntl.h(12.02 KB)
📄 fenv.h(8.19 KB)
📄 fetch.h(4.87 KB)
📄 figpar.h(3.84 KB)
📄 float.h(86 B)
📄 floatingpoint.h(2.01 KB)
📄 fmtmsg.h(2.76 KB)
📄 fmtutils.h(2.19 KB)
📄 fnmatch.h(2.32 KB)
📄 form.h(18.37 KB)
📁 fs
📄 fstab.h(3.03 KB)
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📄 gelf.h(5 KB)
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📁 gssapi
📄 gssapi.h(158 B)
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📄 hdb_err.h(944 B)
📄 heim_asn1.h(2.33 KB)
📄 heim_err.h(1.46 KB)
📄 heim_threads.h(6.91 KB)
📄 heimbase.h(5.1 KB)
📄 heimntlm-protos.h(3.78 KB)
📄 heimntlm.h(4.85 KB)
📄 hex.h(2.08 KB)
📄 histedit.h(9.16 KB)
📄 hx509-private.h(9.39 KB)
📄 hx509-protos.h(22.53 KB)
📄 hx509.h(5.88 KB)
📄 hx509_err.h(3.04 KB)
📄 iconv.h(4.23 KB)
📄 ieeefp.h(261 B)
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📁 infiniband
📄 inttypes.h(2.2 KB)
📄 iso646.h(1.67 KB)
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📄 jail.h(2.46 KB)
📄 k524_err.h(724 B)
📁 kadm5
📄 kafs.h(7.09 KB)
📄 kdc-protos.h(2.25 KB)
📄 kdc.h(3.5 KB)
📄 kenv.h(1.58 KB)
📁 krb5
📄 krb5-private.h(12.91 KB)
📄 krb5-protos.h(113.43 KB)
📄 krb5-types.h(1.48 KB)
📄 krb5.h(29.75 KB)
📄 krb5_asn1.h(70.51 KB)
📄 krb5_ccapi.h(7.52 KB)
📄 krb5_err.h(7.37 KB)
📄 kvm.h(4.11 KB)
📄 kx509_asn1.h(4.61 KB)
📄 langinfo.h(3.95 KB)
📁 lib80211
📁 lib9p
📄 libcasper.h(6.53 KB)
📄 libcasper_service.h(2.5 KB)
📄 libdwarf.h(32.98 KB)
📄 libelf.h(7.72 KB)
📄 libgen.h(2.65 KB)
📄 libgeom.h(4.47 KB)
📄 libgpio.h(3.48 KB)
📁 libipt
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📄 libnetmap.h(24.54 KB)
📄 libproc.h(5.51 KB)
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📄 librss.h(2.96 KB)
📄 libufs.h(5.08 KB)
📄 libusb.h(22.05 KB)
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📄 libusb20_desc.h(17.6 KB)
📄 libutil.h(8.04 KB)
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📄 libzfs.h(32.8 KB)
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📄 limits.h(4.7 KB)
📄 link.h(1.71 KB)
📄 linker_set.h(3.85 KB)
📄 locale.h(2.64 KB)
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📄 lzma.h(9.63 KB)
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📄 magic.h(5.64 KB)
📄 malloc.h(102 B)
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📄 menu.h(11.99 KB)
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📄 mp.h(857 B)
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📄 mqueue.h(2.22 KB)
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📄 ncurses.h(97.92 KB)
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📄 nl_types.h(2.94 KB)
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📄 nss.h(2.32 KB)
📄 nsswitch.h(7.16 KB)
📄 ntlm_err.h(970 B)
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📄 parse_units.h(2.73 KB)
📄 pathconv.h(1.64 KB)
📄 paths.h(5.16 KB)
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📄 pcap-bpf.h(2.24 KB)
📄 pcap-namedb.h(1.98 KB)
📄 pcap-netmap.h(126 B)
📄 pcap.h(2.17 KB)
📄 pkcs10_asn1.h(4.13 KB)
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📄 pkcs9_asn1.h(5.95 KB)
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📄 radlib.h(8.86 KB)
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📄 readpassphrase.h(1.82 KB)
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📄 rfc2459_asn1.h(73.99 KB)
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📄 roken-common.h(11.68 KB)
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📄 ugidfw.h(2.68 KB)
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📄 wctype.h(3.89 KB)
📄 wind.h(3.09 KB)
📄 wind_err.h(860 B)
📄 wordexp.h(2.75 KB)
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📄 xdbm.h(1.91 KB)
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📄 xlocale.h(2.23 KB)
📄 ypclnt.h(2.33 KB)
📄 zconf.h(16.24 KB)
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📄 zinject.h(2.14 KB)
📄 zlib.h(94.08 KB)
📄 zstream.h(820 B)
📄 zutil_import.h(2.51 KB)

Editing: fenv.h

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#ifndef	_FENV_H_
#define	_FENV_H_

#include <sys/cdefs.h>
#include <sys/_types.h>
#include <ieeefp.h>

#ifndef	__fenv_static
#define	__fenv_static	static
#endif

typedef	__uint16_t	fexcept_t;

/* Exception flags */
#define	FE_INVALID	0x01
#define	FE_DENORMAL	0x02
#define	FE_DIVBYZERO	0x04
#define	FE_OVERFLOW	0x08
#define	FE_UNDERFLOW	0x10
#define	FE_INEXACT	0x20
#define	FE_ALL_EXCEPT	(FE_DIVBYZERO | FE_DENORMAL | FE_INEXACT | \
			 FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)

/* Rounding modes */
#define	FE_TONEAREST	0x0000
#define	FE_DOWNWARD	0x0400
#define	FE_UPWARD	0x0800
#define	FE_TOWARDZERO	0x0c00
#define	_ROUND_MASK	(FE_TONEAREST | FE_DOWNWARD | \
			 FE_UPWARD | FE_TOWARDZERO)

/*
 * As compared to the x87 control word, the SSE unit's control word
 * has the rounding control bits offset by 3 and the exception mask
 * bits offset by 7.
 */
#define	_SSE_ROUND_SHIFT	3
#define	_SSE_EMASK_SHIFT	7

#ifdef __i386__
/*
 * To preserve binary compatibility with FreeBSD 5.3, we pack the
 * mxcsr into some reserved fields, rather than changing sizeof(fenv_t).
 */
typedef struct {
	__uint16_t	__control;
	__uint16_t      __mxcsr_hi;
	__uint16_t	__status;
	__uint16_t      __mxcsr_lo;
	__uint32_t	__tag;
	char		__other[16];
} fenv_t;
#else /* __amd64__ */
typedef struct {
	struct {
		__uint32_t	__control;
		__uint32_t	__status;
		__uint32_t	__tag;
		char		__other[16];
	} __x87;
	__uint32_t		__mxcsr;
} fenv_t;
#endif /* __i386__ */

__BEGIN_DECLS

/* Default floating-point environment */
extern const fenv_t	__fe_dfl_env;
#define	FE_DFL_ENV	(&__fe_dfl_env)

#define	__fldenvx(__env)	__asm __volatile("fldenv %0" : : "m" (__env)  \
				: "st", "st(1)", "st(2)", "st(3)", "st(4)",   \
				"st(5)", "st(6)", "st(7)")
#define	__fwait()		__asm __volatile("fwait")

int fegetenv(fenv_t *__envp);
int feholdexcept(fenv_t *__envp);
int fesetexceptflag(const fexcept_t *__flagp, int __excepts);
int feraiseexcept(int __excepts);
int feupdateenv(const fenv_t *__envp);

__fenv_static inline int
fegetround(void)
{
	__uint16_t __control;

/*
	 * We assume that the x87 and the SSE unit agree on the
	 * rounding mode.  Reading the control word on the x87 turns
	 * out to be about 5 times faster than reading it on the SSE
	 * unit on an Opteron 244.
	 */
	__fnstcw(&__control);
	return (__control & _ROUND_MASK);
}

#if __BSD_VISIBLE

int feenableexcept(int __mask);
int fedisableexcept(int __mask);

/* We currently provide no external definition of fegetexcept(). */
static inline int
fegetexcept(void)
{
	__uint16_t __control;

/*
	 * We assume that the masks for the x87 and the SSE unit are
	 * the same.
	 */
	__fnstcw(&__control);
	return (~__control & FE_ALL_EXCEPT);
}

#endif /* __BSD_VISIBLE */

#ifdef __i386__

/* After testing for SSE support once, we cache the result in __has_sse. */
enum __sse_support { __SSE_YES, __SSE_NO, __SSE_UNK };
extern enum __sse_support __has_sse;
int __test_sse(void);
#ifdef __SSE__
#define	__HAS_SSE()	1
#else
#define	__HAS_SSE()	(__has_sse == __SSE_YES ||			\
			 (__has_sse == __SSE_UNK && __test_sse()))
#endif

#define	__get_mxcsr(env)	(((env).__mxcsr_hi << 16) |	\
				 ((env).__mxcsr_lo))
#define	__set_mxcsr(env, x)	do {				\
	(env).__mxcsr_hi = (__uint32_t)(x) >> 16;		\
	(env).__mxcsr_lo = (__uint16_t)(x);			\
} while (0)

__fenv_static inline int
feclearexcept(int __excepts)
{
	fenv_t __env;
	__uint32_t __mxcsr;

if (__excepts == FE_ALL_EXCEPT) {
		__fnclex();
	} else {
		__fnstenv(&__env);
		__env.__status &= ~__excepts;
		__fldenv(&__env);
	}
	if (__HAS_SSE()) {
		__stmxcsr(&__mxcsr);
		__mxcsr &= ~__excepts;
		__ldmxcsr(&__mxcsr);
	}
	return (0);
}

__fenv_static inline int
fegetexceptflag(fexcept_t *__flagp, int __excepts)
{
	__uint32_t __mxcsr;
	__uint16_t __status;

__fnstsw(&__status);
	if (__HAS_SSE())
		__stmxcsr(&__mxcsr);
	else
		__mxcsr = 0;
	*__flagp = (__mxcsr | __status) & __excepts;
	return (0);
}

__fenv_static inline int
fetestexcept(int __excepts)
{
	__uint32_t __mxcsr;
	__uint16_t __status;

__fnstsw(&__status);
	if (__HAS_SSE())
		__stmxcsr(&__mxcsr);
	else
		__mxcsr = 0;
	return ((__status | __mxcsr) & __excepts);
}

__fenv_static inline int
fesetround(int __round)
{
	__uint32_t __mxcsr;
	__uint16_t __control;

if (__round & ~_ROUND_MASK)
		return (-1);

__fnstcw(&__control);
	__control &= ~_ROUND_MASK;
	__control |= __round;
	__fldcw(&__control);

if (__HAS_SSE()) {
		__stmxcsr(&__mxcsr);
		__mxcsr &= ~(_ROUND_MASK << _SSE_ROUND_SHIFT);
		__mxcsr |= __round << _SSE_ROUND_SHIFT;
		__ldmxcsr(&__mxcsr);
	}

return (0);
}

__fenv_static inline int
fesetenv(const fenv_t *__envp)
{
	fenv_t __env = *__envp;
	__uint32_t __mxcsr;

__mxcsr = __get_mxcsr(__env);
	__set_mxcsr(__env, 0xffffffff);
	/*
	 * XXX Using fldenvx() instead of fldenv() tells the compiler that this
	 * instruction clobbers the i387 register stack.  This happens because
	 * we restore the tag word from the saved environment.  Normally, this
	 * would happen anyway and we wouldn't care, because the ABI allows
	 * function calls to clobber the i387 regs.  However, fesetenv() is
	 * inlined, so we need to be more careful.
	 */
	__fldenvx(__env);
	if (__HAS_SSE())
		__ldmxcsr(&__mxcsr);
	return (0);
}

#else /* __amd64__ */

__fenv_static inline int
feclearexcept(int __excepts)
{
	fenv_t __env;

if (__excepts == FE_ALL_EXCEPT) {
		__fnclex();
	} else {
		__fnstenv(&__env.__x87);
		__env.__x87.__status &= ~__excepts;
		__fldenv(&__env.__x87);
	}
	__stmxcsr(&__env.__mxcsr);
	__env.__mxcsr &= ~__excepts;
	__ldmxcsr(&__env.__mxcsr);
	return (0);
}

__fenv_static inline int
fegetexceptflag(fexcept_t *__flagp, int __excepts)
{
	__uint32_t __mxcsr;
	__uint16_t __status;

__stmxcsr(&__mxcsr);
	__fnstsw(&__status);
	*__flagp = (__mxcsr | __status) & __excepts;
	return (0);
}

__fenv_static inline int
fetestexcept(int __excepts)
{
	__uint32_t __mxcsr;
	__uint16_t __status;

__stmxcsr(&__mxcsr);
	__fnstsw(&__status);
	return ((__status | __mxcsr) & __excepts);
}

__fenv_static inline int
fesetround(int __round)
{
	__uint32_t __mxcsr;
	__uint16_t __control;

if (__round & ~_ROUND_MASK)
		return (-1);

__fnstcw(&__control);
	__control &= ~_ROUND_MASK;
	__control |= __round;
	__fldcw(&__control);

__stmxcsr(&__mxcsr);
	__mxcsr &= ~(_ROUND_MASK << _SSE_ROUND_SHIFT);
	__mxcsr |= __round << _SSE_ROUND_SHIFT;
	__ldmxcsr(&__mxcsr);

return (0);
}

__fenv_static inline int
fesetenv(const fenv_t *__envp)
{

/*
	 * XXX Using fldenvx() instead of fldenv() tells the compiler that this
	 * instruction clobbers the i387 register stack.  This happens because
	 * we restore the tag word from the saved environment.  Normally, this
	 * would happen anyway and we wouldn't care, because the ABI allows
	 * function calls to clobber the i387 regs.  However, fesetenv() is
	 * inlined, so we need to be more careful.
	 */
	__fldenvx(__envp->__x87);
	__ldmxcsr(&__envp->__mxcsr);
	return (0);
}

#endif /* __i386__ */

__END_DECLS

#endif	/* !_FENV_H_ */

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