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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <fenv.h>
#include <math.h>
/*
* We save and restore the floating-point environment to avoid raising
* an inexact exception. We can get away with using fesetenv()
* instead of feclearexcept()/feupdateenv() to restore the environment
* because the only exception defined for rint() is overflow, and
* rounding can't overflow as long as emax >= p.
*
* The volatile keyword is needed below because clang incorrectly assumes
* that rint won't raise any floating-point exceptions. Declaring ret volatile
* is sufficient to trick the compiler into doing the right thing.
*/
#define DECL(type, fn, rint) \
type \
fn(type x) \
{ \
volatile type ret; \
fenv_t env; \
\
fegetenv(&env); \
ret = rint(x); \
fesetenv(&env); \
return (ret); \
}
/*
* nearbyint and nearbyintf are defined elsewhere in
* newlib. Ignore the freebsd versions and only compile
* nearbyintl.
*/
#if 0
DECL(double, nearbyint, rint)
DECL(float, nearbyintf, rintf)
#endif
DECL(long double, nearbyintl, rintl)
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