/*- * 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_private.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); \
}
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