/* $NetBSD: fpclassifyf.c,v 1.3 2008/04/28 20:22:57 martin Exp $ */ /*- * Copyright (c) 2004 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 #if defined(LIBC_SCCS) && !defined(lint) __RCSID("$NetBSD: fpclassifyf.c,v 1.3 2008/04/28 20:22:57 martin Exp $"); #endif #include #include /* * 7.12.3.1 fpclassify - classify real floating type * VAX F_floating version * * Implementation notes: * Reserved operand -> FP_ROP * True zero -> FP_ZERO * Dirty zero -> FP_DIRTY_ZERO * Finite -> FP_NORMAL */ int __fpclassifyf(float x) { union vax_ffloating_u u; u.ffltu_f = x; if (u.ffltu_fflt.fflt_exp == 0) { if (u.ffltu_fflt.fflt_sign != 0) return FP_ROP; else if (u.ffltu_fflt.fflt_frach != 0 || u.ffltu_fflt.fflt_fracl != 0) return FP_DIRTYZERO; else return FP_ZERO; } else { return FP_NORMAL; } }