glibc/sysdeps/i386/fpu/s_isnanl.c
Ulrich Drepper f83af095b6 Update.
* include/math.h: Declare __isinf_internal, __isinfl_internal,
	__isnan_internal, and __isnanl_internal.
	* stdio-common/printf_fp.c: Use INTUSE for calls to __isinf, __isinfl,
	__isnan, and __isnanl.
	* stdio-common/printf_size.c: Likewise.
	* sysdeps/generic/printf_fphex.c: Likewise.
	* sysdeps/i386/fpu/s_isinfl.c: Also define _internal alias.
	* sysdeps/i386/fpu/s_isnanl.c: Likewise.
	* sysdeps/ia64/fpu/s_isinf.S: Likewise.
	* sysdeps/ia64/fpu/s_isnan.S: Likewise.
	* sysdeps/ieee754/dbl-64/s_isinf.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_isnan.c: Likewise.
	* sysdeps/ieee754/flt-32/s_isinff.c: Likewise.
	* sysdeps/ieee754/flt-32/s_isnanf.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_isinfl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_isnanl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_isinfl.c: Likewise.
	* sysdeps/m68k/s_isinfl.c: Likewise.
	* sysdeps/m68k/fpu/s_isinf.c: Likewise.
	* sysdeps/powerpc/fpu/s_isnan.c: Likewise.
2002-04-14 17:55:43 +00:00

49 lines
1.2 KiB
C

/* s_isnanl.c -- long double version for i387 of s_isnan.c.
* Conversion to long double by Ulrich Drepper,
* Cygnus Support, drepper@cygnus.com.
*/
/*
* ====================================================
* 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
/*
* isnanl(x) returns 1 is x is nan, else 0;
* no branching!
*/
#include "math.h"
#include "math_private.h"
#ifdef __STDC__
int __isnanl(long double x)
#else
int __isnanl(x)
long double x;
#endif
{
int32_t se,hx,lx;
GET_LDOUBLE_WORDS(se,hx,lx,x);
se = (se & 0x7fff) << 1;
/* The additional & 0x7fffffff is required because Intel's
extended format has the normally implicit 1 explicit
present. Sigh! */
lx |= hx & 0x7fffffff;
se |= (u_int32_t)(lx|(-lx))>>31;
se = 0xfffe - se;
return (int)((u_int32_t)(se))>>16;
}
INTDEF(__isnanl)
weak_alias (__isnanl, isnanl)