5e53a4f90f
Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
284 lines
6.0 KiB
C
284 lines
6.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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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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#ifndef _FENV_H_
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#define _FENV_H_
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#include <sys/_types.h>
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#ifndef __fenv_static
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#define __fenv_static static
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#endif
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typedef __uint32_t fenv_t;
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typedef __uint32_t fexcept_t;
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/* Exception flags */
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#ifdef __mips_soft_float
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#define _FPUSW_SHIFT 16
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#define FE_INVALID 0x0001
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#define FE_DIVBYZERO 0x0002
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#define FE_OVERFLOW 0x0004
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#define FE_UNDERFLOW 0x0008
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#define FE_INEXACT 0x0010
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#else
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#define _FCSR_CAUSE_SHIFT 10
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#define FE_INVALID 0x0040
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#define FE_DIVBYZERO 0x0020
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#define FE_OVERFLOW 0x0010
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#define FE_UNDERFLOW 0x0008
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#define FE_INEXACT 0x0004
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#endif
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#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
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FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
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/* Rounding modes */
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#define FE_TONEAREST 0x0000
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#define FE_TOWARDZERO 0x0001
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#define FE_UPWARD 0x0002
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#define FE_DOWNWARD 0x0003
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#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
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FE_UPWARD | FE_TOWARDZERO)
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__BEGIN_DECLS
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/* Default floating-point environment */
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extern const fenv_t __fe_dfl_env;
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#define FE_DFL_ENV (&__fe_dfl_env)
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/* We need to be able to map status flag positions to mask flag positions */
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#define _ENABLE_SHIFT 5
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#define _ENABLE_MASK (FE_ALL_EXCEPT << _ENABLE_SHIFT)
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#if !defined(__mips_soft_float) && !defined(__mips_hard_float)
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#error compiler didnt set soft/hard float macros
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#endif
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#ifndef __mips_soft_float
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#define __cfc1(__fcsr) __asm __volatile("cfc1 %0, $31" : "=r" (__fcsr))
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#define __ctc1(__fcsr) __asm __volatile("ctc1 %0, $31" :: "r" (__fcsr))
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#endif
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#ifdef __mips_soft_float
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int feclearexcept(int __excepts);
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int fegetexceptflag(fexcept_t *__flagp, int __excepts);
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int fesetexceptflag(const fexcept_t *__flagp, int __excepts);
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int feraiseexcept(int __excepts);
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int fetestexcept(int __excepts);
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int fegetround(void);
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int fesetround(int __round);
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int fegetenv(fenv_t *__envp);
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int feholdexcept(fenv_t *__envp);
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int fesetenv(const fenv_t *__envp);
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int feupdateenv(const fenv_t *__envp);
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#else
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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 fcsr;
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__excepts &= FE_ALL_EXCEPT;
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__cfc1(fcsr);
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fcsr &= ~(__excepts | (__excepts << _FCSR_CAUSE_SHIFT));
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__ctc1(fcsr);
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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 fcsr;
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__excepts &= FE_ALL_EXCEPT;
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__cfc1(fcsr);
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*__flagp = fcsr & __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 fcsr;
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__excepts &= FE_ALL_EXCEPT;
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__cfc1(fcsr);
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fcsr &= ~__excepts;
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fcsr |= *__flagp & __excepts;
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__ctc1(fcsr);
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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 fcsr;
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__excepts &= FE_ALL_EXCEPT;
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__cfc1(fcsr);
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fcsr |= __excepts | (__excepts << _FCSR_CAUSE_SHIFT);
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__ctc1(fcsr);
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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 fcsr;
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__excepts &= FE_ALL_EXCEPT;
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__cfc1(fcsr);
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return (fcsr & __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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fexcept_t fcsr;
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__cfc1(fcsr);
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return (fcsr & _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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fexcept_t fcsr;
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if (__round & ~_ROUND_MASK)
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return (-1);
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__cfc1(fcsr);
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fcsr &= ~_ROUND_MASK;
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fcsr |= __round;
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__ctc1(fcsr);
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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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__cfc1(*__envp);
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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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fexcept_t fcsr;
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__cfc1(fcsr);
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*__envp = fcsr;
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fcsr &= ~(FE_ALL_EXCEPT | _ENABLE_MASK);
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__ctc1(fcsr);
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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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__ctc1(*__envp);
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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 fcsr;
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__cfc1(fcsr);
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fesetenv(__envp);
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feraiseexcept(fcsr);
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return (0);
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}
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#endif /* !__mips_soft_float */
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#if __BSD_VISIBLE
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/* We currently provide no external definitions of the functions below. */
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#ifdef __mips_soft_float
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int feenableexcept(int __mask);
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int fedisableexcept(int __mask);
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int fegetexcept(void);
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#else
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static inline int
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feenableexcept(int __mask)
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{
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fenv_t __old_fcsr, __new_fcsr;
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__cfc1(__old_fcsr);
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__new_fcsr = __old_fcsr | (__mask & FE_ALL_EXCEPT) << _ENABLE_SHIFT;
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__ctc1(__new_fcsr);
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return ((__old_fcsr >> _ENABLE_SHIFT) & FE_ALL_EXCEPT);
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}
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static inline int
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fedisableexcept(int __mask)
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{
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fenv_t __old_fcsr, __new_fcsr;
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__cfc1(__old_fcsr);
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__new_fcsr = __old_fcsr & ~((__mask & FE_ALL_EXCEPT) << _ENABLE_SHIFT);
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__ctc1(__new_fcsr);
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return ((__old_fcsr >> _ENABLE_SHIFT) & FE_ALL_EXCEPT);
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}
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static inline int
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fegetexcept(void)
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{
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fexcept_t fcsr;
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__cfc1(fcsr);
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return ((fcsr & _ENABLE_MASK) >> _ENABLE_SHIFT);
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}
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#endif /* !__mips_soft_float */
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#endif /* __BSD_VISIBLE */
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__END_DECLS
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#endif /* !_FENV_H_ */
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