/*-
 * 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: src/lib/msun/src/s_isnan.c,v 1.9 2010/06/12 17:32:05 das Exp $
 */

#undef isnanl

int
isnanl(long double e)
{
    union IEEEl2bits u;

    u.e = e;
#if LDBL_NBIT != 0
#if LDBL_NBIT_INF == 0
    /* m68k inf can have either a 1 or 0 explicit one bit */
    if (u.bits.exp == LDBL_INF_NAN_EXP)
        u.bits.manh |= LDBL_NBIT;
#endif
    if ((u.bits.manh & LDBL_NBIT) == 0 && u.bits.exp != 0)
        return 1;
#endif
    return (u.bits.exp == LDBL_INF_NAN_EXP && (u.bits.manl != 0 || u.bits.manh != LDBL_NBIT));
}

#ifdef __strong_reference
__strong_reference_dup(isnanl, __isnanl);
#else
int
__isnanl(long double x)
{
    return isnanl(x);
}
#endif
