/*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG> * All rights reserved. * * 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 AUTHOR 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 AUTHOR 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. * * $FreeBSD$ */ #include <machine/float.h> #include <math.h> #include "fpmath.h" /* * XXX These routines belong in libm, but they must remain in libc for * binary compat until we can bump libm's major version number. */ __weak_reference(__isinf, isinf); int __isinf(double d) { union IEEEd2bits u; u.d = d; return (u.bits.exp == 2047 && u.bits.manl == 0 && u.bits.manh == 0); } int __isinff(float f) { union IEEEf2bits u; u.f = f; return (u.bits.exp == 255 && u.bits.man == 0); } int __isinfl(long double e) { union IEEEl2bits u; u.e = e; mask_nbit_l(u); #if LDBL_MANT_DIG == 53 return (u.bits.exp == 2047 && u.bits.manl == 0 && u.bits.manh == 0); #else return (u.bits.exp == 32767 && u.bits.manl == 0 && u.bits.manh == 0); #endif } |