mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
267ca16a67
Sat Aug 10 13:17:27 1996 David Mosberger-Tang <davidm@azstarnet.com> * shadow.h: New file. * sysdeps/unix/sysv/linux/netinet/in.h: Move __BEGIN_DECLS/__END_DECLS up so ntohl() et al are bracketed as well. * socket/sys/socket.h [__cplusplus]: Use old-style __SOCKADDR_ARG. g++ 2.7.2 (and earlier) has no transparent unions support. Fri Aug 9 18:50:06 1996 David Mosberger-Tang <davidm@azstarnet.com> * sysdeps/unix/sysv/linux/alpha/ioperm.c (_bus_base_sparse): New function to determine the base address of sparse bus memory. (APECS_*): Rename to CIA_*. (APECS_SPARSE_MEM, CIA_SPARSE_MEM): New macros. (platform): Add sparse_bus_memory_base member and initialize. (sparse_bus_memory_base): New variable. Tue Aug 6 10:23:18 1996 David Mosberger-Tang <davidm@azstarnet.com> * sysdeps/posix/ttyname_r.c (ttyname_r), sysdeps/posix/ttyname.c (ttyname): Return -1/NULL if !__isatty(fd) (POSIX.1 says so.) * sysdeps/unix/getlogin.c (getlogin): Fix to check fd 0 only. This is not a gross hack, after all---for compatibility, getlogin() really should check fd 0 only and not try to base its operation on the controlling tty. Wed Jul 17 10:54:20 1996 David Mosberger-Tang <davidm@azstarnet.com> * sysdeps/unix/getlogin.c (getlogin): Add static variable NAME, change utmp_data from static to auto. Sun Aug 11 02:56:08 1996 Ulrich Drepper <drepper@cygnus.com> * posix/unistd.h [__USE_MISC]: Add prototype for `nice'. Reported by David Mosberger-Tang.
44 lines
1011 B
C
44 lines
1011 B
C
/* @(#)s_isnan.c 5.1 93/09/24 */
|
|
/*
|
|
* ====================================================
|
|
* 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: s_isnan.c,v 1.8 1995/05/10 20:47:36 jtc Exp $";
|
|
#endif
|
|
|
|
/*
|
|
* isnan(x) returns 1 is x is nan, else 0;
|
|
* no branching!
|
|
*/
|
|
|
|
#include "math.h"
|
|
#include "math_private.h"
|
|
|
|
#ifdef __STDC__
|
|
int __isnan(double x)
|
|
#else
|
|
int __isnan(x)
|
|
double x;
|
|
#endif
|
|
{
|
|
int32_t hx,lx;
|
|
EXTRACT_WORDS(hx,lx,x);
|
|
hx &= 0x7fffffff;
|
|
hx |= (u_int32_t)(lx|(-lx))>>31;
|
|
hx = 0x7ff00000 - hx;
|
|
return (int)((u_int32_t)(hx))>>31;
|
|
}
|
|
weak_alias (__isnan, isnan)
|
|
#ifdef NO_LONG_DOUBLE
|
|
strong_alias (__isnan, __isnanl)
|
|
weak_alias (__isnan, isnanl)
|
|
#endif
|