1 /*- 2 * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #include <openlibm_math.h> 29 30 #include "fpmath.h" 31 #include "math_private.h" 32 33 /* Provided by libc */ 34 #if 1 35 OLM_DLLEXPORT int 36 (isinf) (double d) 37 { 38 union IEEEd2bits u; 39 40 u.d = d; 41 return (u.bits.exp == 2047 && u.bits.manl == 0 && u.bits.manh == 0); 42 } 43 #endif 44 45 OLM_DLLEXPORT int 46 __isinff(float f) 47 { 48 union IEEEf2bits u; 49 50 u.f = f; 51 return (u.bits.exp == 255 && u.bits.man == 0); 52 } 53 54 #ifdef OPENLIBM_LONG_DOUBLE 55 OLM_DLLEXPORT int 56 __isinfl(long double e) 57 { 58 union IEEEl2bits u; 59 60 u.e = e; 61 mask_nbit_l(u); 62 return (u.bits.exp == 32767 && u.bits.manl == 0 && u.bits.manh == 0); 63 } 64 #endif 65 66 __weak_reference(__isinff, isinff); 67