157 lines
3.3 KiB
C
157 lines
3.3 KiB
C
/*-
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* Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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__fenv_static __inline int
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feclearexcept(int __excepts)
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{
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fexcept_t __r;
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__mrs_fpsr(__r);
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__r &= ~__excepts;
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__msr_fpsr(__r);
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return (0);
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}
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__fenv_static inline int
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fegetexceptflag(fexcept_t *__flagp, int __excepts)
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{
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fexcept_t __r;
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__mrs_fpsr(__r);
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*__flagp = __r & __excepts;
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return (0);
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}
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__fenv_static inline int
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fesetexceptflag(const fexcept_t *__flagp, int __excepts)
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{
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fexcept_t __r;
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__mrs_fpsr(__r);
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__r &= ~__excepts;
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__r |= *__flagp & __excepts;
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__msr_fpsr(__r);
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return (0);
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}
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__fenv_static inline int
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feraiseexcept(int __excepts)
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{
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fexcept_t __r;
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__mrs_fpsr(__r);
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__r |= __excepts;
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__msr_fpsr(__r);
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return (0);
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}
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__fenv_static inline int
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fetestexcept(int __excepts)
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{
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fexcept_t __r;
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__mrs_fpsr(__r);
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return (__r & __excepts);
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}
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__fenv_static inline int
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fegetround(void)
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{
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fenv_t __r;
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__mrs_fpcr(__r);
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return ((__r >> _ROUND_SHIFT) & _ROUND_MASK);
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}
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__fenv_static inline int
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fesetround(int __round)
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{
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fenv_t __r;
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if (__round & ~_ROUND_MASK)
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return (-1);
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__mrs_fpcr(__r);
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__r &= ~(_ROUND_MASK << _ROUND_SHIFT);
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__r |= __round << _ROUND_SHIFT;
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__msr_fpcr(__r);
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return (0);
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}
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__fenv_static inline int
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fegetenv(fenv_t *__envp)
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{
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fenv_t __r;
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__mrs_fpcr(__r);
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*__envp = __r & _ENABLE_MASK;
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__mrs_fpsr(__r);
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*__envp |= __r & (FE_ALL_EXCEPT | (_ROUND_MASK << _ROUND_SHIFT));
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return (0);
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}
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__fenv_static inline int
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feholdexcept(fenv_t *__envp)
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{
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fenv_t __r;
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__mrs_fpcr(__r);
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*__envp = __r & _ENABLE_MASK;
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__r &= ~(_ENABLE_MASK);
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__msr_fpcr(__r);
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__mrs_fpsr(__r);
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*__envp |= __r & (FE_ALL_EXCEPT | (_ROUND_MASK << _ROUND_SHIFT));
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__r &= ~(_ENABLE_MASK);
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__msr_fpsr(__r);
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return (0);
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}
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__fenv_static inline int
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fesetenv(const fenv_t *__envp)
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{
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__msr_fpcr((*__envp) & _ENABLE_MASK);
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__msr_fpsr((*__envp) & (FE_ALL_EXCEPT | (_ROUND_MASK << _ROUND_SHIFT)));
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return (0);
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}
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__fenv_static inline int
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feupdateenv(const fenv_t *__envp)
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{
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fexcept_t __r;
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__mrs_fpsr(__r);
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fesetenv(__envp);
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feraiseexcept(__r & FE_ALL_EXCEPT);
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return (0);
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}
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