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/* origin: FreeBSD /usr/src/lib/msun/src/s_lrint.c */
/*-
* Copyright (c) 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.
*/
#include <fenv.h>
#include "libm.h"
#ifndef type
#define type double
#define roundit rint
#define dtype long
#define fn lrint
#endif
/*
* C99 says we should not raise a spurious inexact exception when an
* invalid exception is raised. Unfortunately, the set of inputs
* that overflows depends on the rounding mode when 'dtype' has more
* significant bits than 'type'. Hence, we bend over backwards for the
* sake of correctness; an MD implementation could be more efficient.
*/
dtype fn(type x)
{
fenv_t env;
dtype d;
feholdexcept(&env);
d = (dtype)roundit(x);
#if defined(FE_INVALID) && defined(FE_INEXACT)
if (fetestexcept(FE_INVALID))
feclearexcept(FE_INEXACT);
#endif
feupdateenv(&env);
return d;
}
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