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Rename the fenv headers.

Browse source 
I guess the idea would be to eventually also install all of the
openlibm*.h headers, instead of just openlibm.h. Make openlibm_fenv.h
suitable for this purpose by moving all of the $ARCH/fenv.h headers next
to it.

We actually need this change to make OPENLIBM_USE_HOST_FENV_H work.
Right now it's still broken, because the "#include <fenv.h>" performed
by openlibm_fenv.h still pulls in $ARCH/fenv.h as $ARCH/ is added to the
compiler include path.
This commit is contained in:
Ed Schouten 2015-01-10 10:21:57 +01:00
parent 9ab9db387d
commit d07820351b
7 changed files with 709 additions and 3 deletions
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0
amd64/fenv.h → amd64/openlibm_fenv.h
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0
arm/fenv.h → arm/openlibm_fenv.h
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0
i387/fenv.h → i387/openlibm_fenv.h
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6
src/openlibm_fenv.h
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@ -3,11 +3,11 @@
#else /* !OPENLIBM_USE_HOST_FENV_H */ #else /* !OPENLIBM_USE_HOST_FENV_H */
#if defined(__arm__) #if defined(__arm__)
#include "../arm/fenv.h" #include <openlibm_fenv_arm.h>
#elif defined(__x86_64__) #elif defined(__x86_64__)
#include "../amd64/fenv.h" #include <openlibm_fenv_amd64.h>
#elif defined(__i386__) #elif defined(__i386__)
#include "../i387/fenv.h" #include <openlibm_fenv_i387.h>
#else #else
#error "Unsupported platform" #error "Unsupported platform"
#endif #endif

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src/openlibm_fenv_amd64.h Normal file
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/*-
* 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: src/lib/msun/amd64/fenv.h,v 1.8 2011/10/10 15:43:09 das Exp $
*/
#ifndef _FENV_H_
#define _FENV_H_
#include "cdefs-compat.h"
#include "types-compat.h"
#include "math_private.h"
#ifndef __fenv_static
#define __fenv_static static
#endif
typedef struct {
struct {
uint32_t __control;
uint32_t __status;
uint32_t __tag;
char __other[16];
} __x87;
uint32_t __mxcsr;
} fenv_t;
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
__BEGIN_DECLS
/* Default floating-point environment */
extern const fenv_t __fe_dfl_env;
#define FE_DFL_ENV (&__fe_dfl_env)
#define __fldcw(__cw) __asm __volatile("fldcw %0" : : "m" (__cw))
#define __fldenv(__env) __asm __volatile("fldenv %0" : : "m" (__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 __fnclex() __asm __volatile("fnclex")
#define __fnstenv(__env) __asm __volatile("fnstenv %0" : "=m" (*(__env)))
#define __fnstcw(__cw) __asm __volatile("fnstcw %0" : "=m" (*(__cw)))
#define __fnstsw(__sw) __asm __volatile("fnstsw %0" : "=am" (*(__sw)))
#define __fwait() __asm __volatile("fwait")
#define __ldmxcsr(__csr) __asm __volatile("ldmxcsr %0" : : "m" (__csr))
#define __stmxcsr(__csr) __asm __volatile("stmxcsr %0" : "=m" (*(__csr)))
__fenv_static __attribute__((always_inline)) DLLEXPORT 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 DLLEXPORT inline int
fegetexceptflag(fexcept_t *__flagp, int __excepts)
{
uint32_t __mxcsr;
uint16_t __status;
__stmxcsr(&__mxcsr);
__fnstsw(&__status);
*__flagp = (__mxcsr | __status) & __excepts;
return (0);
}
DLLEXPORT int fesetexceptflag(const fexcept_t *__flagp, int __excepts);
DLLEXPORT int feraiseexcept(int __excepts);
__fenv_static __attribute__((always_inline)) DLLEXPORT inline int
fetestexcept(int __excepts)
{
uint32_t __mxcsr;
uint16_t __status;
__stmxcsr(&__mxcsr);
__fnstsw(&__status);
return ((__status | __mxcsr) & __excepts);
}
__fenv_static DLLEXPORT 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);
}
__fenv_static DLLEXPORT 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);
}
DLLEXPORT int fegetenv(fenv_t *__envp);
DLLEXPORT int feholdexcept(fenv_t *__envp);
__fenv_static DLLEXPORT 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);
}
DLLEXPORT int feupdateenv(const fenv_t *__envp);
#if __BSD_VISIBLE
DLLEXPORT int feenableexcept(int __mask);
DLLEXPORT int fedisableexcept(int __mask);
/* We currently provide no external definition of fegetexcept(). */
static inline DLLEXPORT 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 */
__END_DECLS
#endif /* !_FENV_H_ */

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/*-
* 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: src/lib/msun/arm/fenv.h,v 1.6 2011/10/10 15:43:09 das Exp $
*/
#ifndef _FENV_H_
#define _FENV_H_
#include <stdint.h>
#ifndef __fenv_static
#define __fenv_static static
#endif
typedef uint32_t fenv_t;
typedef uint32_t fexcept_t;
/* Exception flags */
#define FE_INVALID 0x0001
#define FE_DIVBYZERO 0x0002
#define FE_OVERFLOW 0x0004
#define FE_UNDERFLOW 0x0008
#define FE_INEXACT 0x0010
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
/* Rounding modes */
#define FE_TONEAREST 0x0000
#define FE_TOWARDZERO 0x0001
#define FE_UPWARD 0x0002
#define FE_DOWNWARD 0x0003
#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
FE_UPWARD | FE_TOWARDZERO)
__BEGIN_DECLS
/* Default floating-point environment */
extern const fenv_t __fe_dfl_env;
#define FE_DFL_ENV (&__fe_dfl_env)
/* We need to be able to map status flag positions to mask flag positions */
#define _FPUSW_SHIFT 16
#define _ENABLE_MASK (FE_ALL_EXCEPT << _FPUSW_SHIFT)
#ifdef ARM_HARD_FLOAT
#define __rfs(__fpsr) __asm __volatile("rfs %0" : "=r" (*(__fpsr)))
#define __wfs(__fpsr) __asm __volatile("wfs %0" : : "r" (__fpsr))
#else
#define __rfs(__fpsr)
#define __wfs(__fpsr)
#endif
__fenv_static inline int
feclearexcept(int __excepts)
{
fexcept_t __fpsr;
__rfs(&__fpsr);
__fpsr &= ~__excepts;
__wfs(__fpsr);
return (0);
}
__fenv_static inline int
fegetexceptflag(fexcept_t *__flagp, int __excepts)
{
fexcept_t __fpsr;
__rfs(&__fpsr);
*__flagp = __fpsr & __excepts;
return (0);
}
__fenv_static inline int
fesetexceptflag(const fexcept_t *__flagp, int __excepts)
{
fexcept_t __fpsr;
__rfs(&__fpsr);
__fpsr &= ~__excepts;
__fpsr |= *__flagp & __excepts;
__wfs(__fpsr);
return (0);
}
__fenv_static inline int
feraiseexcept(int __excepts)
{
fexcept_t __ex = __excepts;
fesetexceptflag(&__ex, __excepts); /* XXX */
return (0);
}
__fenv_static inline int
fetestexcept(int __excepts)
{
fexcept_t __fpsr;
__rfs(&__fpsr);
return (__fpsr & __excepts);
}
__fenv_static inline int
fegetround(void)
{
/*
* Apparently, the rounding mode is specified as part of the
* instruction format on ARM, so the dynamic rounding mode is
* indeterminate. Some FPUs may differ.
*/
return (-1);
}
__fenv_static inline int
fesetround(int __round)
{
return (-1);
}
__fenv_static inline int
fegetenv(fenv_t *__envp)
{
__rfs(__envp);
return (0);
}
__fenv_static inline int
feholdexcept(fenv_t *__envp)
{
fenv_t __env;
__rfs(&__env);
*__envp = __env;
__env &= ~(FE_ALL_EXCEPT | _ENABLE_MASK);
__wfs(__env);
return (0);
}
__fenv_static inline int
fesetenv(const fenv_t *__envp)
{
__wfs(*__envp);
return (0);
}
__fenv_static inline int
feupdateenv(const fenv_t *__envp)
{
fexcept_t __fpsr;
__rfs(&__fpsr);
__wfs(*__envp);
feraiseexcept(__fpsr & FE_ALL_EXCEPT);
return (0);
}
#if __BSD_VISIBLE
/* We currently provide no external definitions of the functions below. */
static inline int
feenableexcept(int __mask)
{
fenv_t __old_fpsr, __new_fpsr;
__rfs(&__old_fpsr);
__new_fpsr = __old_fpsr | (__mask & FE_ALL_EXCEPT) << _FPUSW_SHIFT;
__wfs(__new_fpsr);
return ((__old_fpsr >> _FPUSW_SHIFT) & FE_ALL_EXCEPT);
}
static inline int
fedisableexcept(int __mask)
{
fenv_t __old_fpsr, __new_fpsr;
__rfs(&__old_fpsr);
__new_fpsr = __old_fpsr & ~((__mask & FE_ALL_EXCEPT) << _FPUSW_SHIFT);
__wfs(__new_fpsr);
return ((__old_fpsr >> _FPUSW_SHIFT) & FE_ALL_EXCEPT);
}
static inline int
fegetexcept(void)
{
fenv_t __fpsr;
__rfs(&__fpsr);
return ((__fpsr & _ENABLE_MASK) >> _FPUSW_SHIFT);
}
#endif /* __BSD_VISIBLE */
__END_DECLS
#endif /* !_FENV_H_ */

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/*-
* 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: src/lib/msun/i387/fenv.h,v 1.8 2011/10/10 15:43:09 das Exp $
*/
#ifndef _FENV_H_
#define _FENV_H_
#include "cdefs-compat.h"
#include "types-compat.h"
#ifndef __fenv_static
#define __fenv_static static
#endif
/*
* 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;
#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)
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
__BEGIN_DECLS
/* 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
/* Default floating-point environment */
extern const fenv_t __fe_dfl_env;
#define FE_DFL_ENV (&__fe_dfl_env)
#define __fldcw(__cw) __asm __volatile("fldcw %0" : : "m" (__cw))
#define __fldenv(__env) __asm __volatile("fldenv %0" : : "m" (__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 __fnclex() __asm __volatile("fnclex")
#define __fnstenv(__env) __asm __volatile("fnstenv %0" : "=m" (*(__env)))
#define __fnstcw(__cw) __asm __volatile("fnstcw %0" : "=m" (*(__cw)))
#define __fnstsw(__sw) __asm __volatile("fnstsw %0" : "=am" (*(__sw)))
#define __fwait() __asm __volatile("fwait")
#define __ldmxcsr(__csr) __asm __volatile("ldmxcsr %0" : : "m" (__csr))
#define __stmxcsr(__csr) __asm __volatile("stmxcsr %0" : "=m" (*(__csr)))
__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);
}
int fesetexceptflag(const fexcept_t *__flagp, int __excepts);
int feraiseexcept(int __excepts);
__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
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);
}
__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);
}
int fegetenv(fenv_t *__envp);
int feholdexcept(fenv_t *__envp);
__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);
}
int feupdateenv(const fenv_t *__envp);
#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 */
__END_DECLS
#endif /* !_FENV_H_ */