mirror of
https://github.com/intel/linux-sgx
synced 2026-06-08 14:49:32 +00:00
Li, Xun
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/* $OpenBSD: fpclassifyl.c,v 1.1 2008/09/07 20:36:07 martynas Exp $ */
|
|
/*
|
|
* Copyright (c) 2008 Martynas Venckus <martynas@openbsd.org>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/ieee.h>
|
|
#include <math.h>
|
|
|
|
#ifdef _TLIBC_GNU_
|
|
int
|
|
__fpclassifyl(long double e)
|
|
{
|
|
struct ieee_ext *p = (struct ieee_ext *)&e;
|
|
|
|
if (p->ext_exp == 0) {
|
|
if (p->ext_frach == 0 && p->ext_fracl == 0)
|
|
return FP_ZERO;
|
|
else
|
|
return FP_SUBNORMAL;
|
|
}
|
|
|
|
p->ext_frach &= ~0x80000000; /* clear normalization bit */
|
|
|
|
if (p->ext_exp == EXT_EXP_INFNAN) {
|
|
if (p->ext_frach == 0 && p->ext_fracl == 0)
|
|
return FP_INFINITE;
|
|
else
|
|
return FP_NAN;
|
|
}
|
|
|
|
return FP_NORMAL;
|
|
}
|
|
#endif
|