mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-12 11:29:30 +00:00
36 lines
887 B
C
36 lines
887 B
C
/* s_isnanl.c -- long double version of s_isnan.c.
|
|
* Conversion to long double by Jakub Jelinek, jj@ultra.linux.cz.
|
|
*/
|
|
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
|
static char rcsid[] = "$NetBSD: $";
|
|
#endif
|
|
|
|
/*
|
|
* isnanq(x) returns 1 is x is nan, else 0;
|
|
* no branching!
|
|
*/
|
|
|
|
#include "quadmath-imp.h"
|
|
|
|
int isnanq(__float128 x)
|
|
{
|
|
int64_t hx,lx;
|
|
GET_FLT128_WORDS64(hx,lx,x);
|
|
hx &= 0x7fffffffffffffffLL;
|
|
hx |= (uint64_t)(lx|(-lx))>>63;
|
|
hx = 0x7fff000000000000LL - hx;
|
|
return (int)((uint64_t)hx>>63);
|
|
}
|