2007-12-16 21:19:28 +00:00
|
|
|
/*-
|
2023-05-10 15:40:58 +00:00
|
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
2017-11-26 02:00:33 +00:00
|
|
|
*
|
2007-12-16 21:19:28 +00:00
|
|
|
* Copyright (c) 2007 David Schultz
|
|
|
|
* 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 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 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.
|
|
|
|
*
|
|
|
|
* $FreeBSD$
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <math.h>
|
|
|
|
|
|
|
|
#include "fpmath.h"
|
2007-12-18 23:46:32 +00:00
|
|
|
#include "../src/math_private.h"
|
2007-12-16 21:19:28 +00:00
|
|
|
|
|
|
|
long double
|
|
|
|
nanl(const char *s)
|
|
|
|
{
|
2007-12-18 23:46:32 +00:00
|
|
|
union {
|
|
|
|
union IEEEl2bits ieee;
|
|
|
|
uint32_t bits[4];
|
|
|
|
} u;
|
2007-12-16 21:19:28 +00:00
|
|
|
|
2007-12-18 23:46:32 +00:00
|
|
|
_scan_nan(u.bits, 4, s);
|
|
|
|
u.ieee.bits.exp = 0x7fff;
|
2008-03-02 20:16:55 +00:00
|
|
|
u.ieee.bits.manh |= 1ULL << 47; /* make it a quiet NaN */
|
2007-12-18 23:46:32 +00:00
|
|
|
return (u.ieee.e);
|
2007-12-16 21:19:28 +00:00
|
|
|
}
|