minix/lib/nbsd_libc/arch/sparc64/gen/fpclassifyl.c
Gianluca Guida b6cbf7203b Import unmodified NetBSD libc in trunk
This patch imports the unmodified current version of NetBSD libc.
The NetBSD includes are in /nbsd_include, while the libc code itself is 
split between lib/nbsd_libc and common/lib/libc.
2011-02-14 19:36:03 +00:00

66 lines
2.4 KiB
C

/* $NetBSD: fpclassifyl.c,v 1.2 2008/04/28 20:22:57 martin Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: fpclassifyl.c,v 1.2 2008/04/28 20:22:57 martin Exp $");
#endif
#include <machine/ieee.h>
#include <math.h>
/*
* 7.12.3.1 fpclassify - classify real floating type
* IEEE 754 compatible 128-bit extended-precision version
*/
int
__fpclassifyl(long double x)
{
union ieee_ext_u u;
u.extu_ld = x;
if (u.extu_ext.ext_exp == 0) {
if (u.extu_ext.ext_frach == 0 && u.extu_ext.ext_frachm == 0 &&
u.extu_ext.ext_fraclm == 0 && u.extu_ext.ext_fracl == 0)
return FP_ZERO;
else
return FP_SUBNORMAL;
} else if (u.extu_ext.ext_exp == EXT_EXP_INFNAN) {
if (u.extu_ext.ext_frach == 0 && u.extu_ext.ext_frachm == 0 &&
u.extu_ext.ext_fraclm == 0 && u.extu_ext.ext_fracl == 0)
return FP_INFINITE;
else
return FP_NAN;
}
return FP_NORMAL;
}