freebsd-nq/lib/msun/arm/fenv.c

/*-
 * Copyright (c) 2004 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.
 *
 * $FreeBSD$
 */

#define	__fenv_static
#include "fenv.h"

/*
 * The following macros map between the softfloat emulator's flags and
 * the hardware's FPSR.  The hardware this file was written for doesn't
 * have rounding control bits, so we stick those in the system ID byte.
 */
#define	__set_env(env, flags, mask, rnd) env = ((flags)			\
						| (mask)<<_FPUSW_SHIFT	\
						| (rnd) << 24)
#define	__env_flags(env)		((env) & FE_ALL_EXCEPT)
#define	__env_mask(env)			(((env) >> _FPUSW_SHIFT)	\
						& FE_ALL_EXCEPT)
#define	__env_round(env)		(((env) >> 24) & _ROUND_MASK)
#include "fenv-softfloat.h"

#ifdef __GNUC_GNU_INLINE__
#error "This file must be compiled with C99 'inline' semantics"
#endif

/*
 * Hopefully the system ID byte is immutable, so it's valid to use
 * this as a default environment.
 */
const fenv_t __fe_dfl_env = 0;

extern inline int feclearexcept(int __excepts);
extern inline int fegetexceptflag(fexcept_t *__flagp, int __excepts);
extern inline int fesetexceptflag(const fexcept_t *__flagp, int __excepts);
extern inline int feraiseexcept(int __excepts);
extern inline int fetestexcept(int __excepts);
extern inline int fegetround(void);
extern inline int fesetround(int __round);
extern inline int fegetenv(fenv_t *__envp);
extern inline int feholdexcept(fenv_t *__envp);
extern inline int fesetenv(const fenv_t *__envp);
extern inline int feupdateenv(const fenv_t *__envp);