1193149Sdougb/*- 2135446Strhodes * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG> 3135446Strhodes * All rights reserved. 4193149Sdougb * 5135446Strhodes * Redistribution and use in source and binary forms, with or without 6135446Strhodes * modification, are permitted provided that the following conditions 7135446Strhodes * are met: 8135446Strhodes * 1. Redistributions of source code must retain the above copyright 9135446Strhodes * notice, this list of conditions and the following disclaimer. 10135446Strhodes * 2. Redistributions in binary form must reproduce the above copyright 11135446Strhodes * notice, this list of conditions and the following disclaimer in the 12135446Strhodes * documentation and/or other materials provided with the distribution. 13135446Strhodes * 14135446Strhodes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15135446Strhodes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16234010Sdougb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17135446Strhodes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18135446Strhodes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19135446Strhodes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20135446Strhodes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21135446Strhodes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22135446Strhodes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23135446Strhodes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24135446Strhodes * SUCH DAMAGE. 25135446Strhodes * 26135446Strhodes * $FreeBSD$ 27135446Strhodes */ 28135446Strhodes 29135446Strhodes#include <math.h> 30135446Strhodes 31135446Strhodes#include "fpmath.h" 32135446Strhodes 33135446Strhodes/* 34135446Strhodes * XXX These routines belong in libm, but they must remain in libc for 35135446Strhodes * binary compat until we can bump libm's major version number. 36135446Strhodes */ 37135446Strhodes 38__weak_reference(__isinf, isinf); 39 40int 41__isinf(double d) 42{ 43 union IEEEd2bits u; 44 45 u.d = d; 46 return (u.bits.exp == 2047 && u.bits.manl == 0 && u.bits.manh == 0); 47} 48 49int 50__isinff(float f) 51{ 52 union IEEEf2bits u; 53 54 u.f = f; 55 return (u.bits.exp == 255 && u.bits.man == 0); 56} 57 58int 59__isinfl(long double e) 60{ 61 union IEEEl2bits u; 62 63 u.e = e; 64 mask_nbit_l(u); 65#ifndef __alpha__ 66 return (u.bits.exp == 32767 && u.bits.manl == 0 && u.bits.manh == 0); 67#else 68 return (u.bits.exp == 2047 && u.bits.manl == 0 && u.bits.manh == 0); 69#endif 70} 71