mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-15 04:20:28 +08:00
39 lines
967 B
C
39 lines
967 B
C
/* s_isnanf.c -- float version of s_isnan.c.
|
|
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
|
|
*/
|
|
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993, 2011 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_isnanf.c,v 1.4 1995/05/10 20:47:38 jtc Exp $";
|
|
#endif
|
|
|
|
/*
|
|
* isnanf(x) returns 1 is x is nan, else 0;
|
|
* no branching!
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
|
|
#undef __isnanf
|
|
int __isnanf(float x)
|
|
{
|
|
int32_t ix;
|
|
GET_FLOAT_WORD(ix,x);
|
|
ix &= 0x7fffffff;
|
|
ix = 0x7f800000 - ix;
|
|
return (int)(((u_int32_t)(ix))>>31);
|
|
}
|
|
hidden_def (__isnanf)
|
|
weak_alias (__isnanf, isnanf)
|