mirror of
https://github.com/google/pebble.git
synced 2025-03-16 01:01:20 +00:00
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
|
/* Copyright 2016 Samsung Electronics Co., Ltd.
|
||
|
|
* Copyright 2016 University of Szeged
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*
|
||
|
|
* This file is based on work under the following copyright and permission
|
||
|
|
* notice:
|
||
|
|
*
|
||
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
||
|
|
*
|
||
|
|
* Developed at SunSoft, a Sun Microsystems, Inc. business.
|
||
|
|
* Permission to use, copy, modify, and distribute this
|
||
|
|
* software is freely granted, provided that this notice
|
||
|
|
* is preserved.
|
||
|
|
*
|
||
|
|
* @(#)s_isnan.c 1.3 95/01/18
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "jerry-libm-internal.h"
|
||
|
|
|
||
|
|
/* isnan(x) returns 1 is x is nan, else 0;
|
||
|
|
* no branching!
|
||
|
|
*/
|
||
|
|
|
||
|
|
int
|
||
|
|
isnan (double x)
|
||
|
|
{
|
||
|
|
int hx, lx;
|
||
|
|
|
||
|
|
hx = (__HI (x) & 0x7fffffff);
|
||
|
|
lx = __LO (x);
|
||
|
|
hx |= (unsigned) (lx | (-lx)) >> 31;
|
||
|
|
hx = 0x7ff00000 - hx;
|
||
|
|
return ((unsigned) (hx)) >> 31;
|
||
|
|
} /* isnan */
|