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       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                 :             :  * $FreeBSD: src/lib/msun/src/s_isfinite.c,v 1.1 2004/07/09 03:32:39 das Exp $
      27                 :             :  */
      28                 :             : 
      29                 :             : #include <openlibm_math.h>
      30                 :             : 
      31                 :             : #include "fpmath.h"
      32                 :             : #include "math_private.h"
      33                 :             : 
      34                 :             : OLM_DLLEXPORT int
      35                 :          29 : __isfinite(double d)
      36                 :             : {
      37                 :             :         union IEEEd2bits u;
      38                 :             : 
      39                 :          29 :         u.d = d;
      40                 :          29 :         return (u.bits.exp != 2047);
      41                 :             : }
      42                 :             : 
      43                 :             : OLM_DLLEXPORT int
      44                 :          49 : __isfinitef(float f)
      45                 :             : {
      46                 :             :         union IEEEf2bits u;
      47                 :             : 
      48                 :          49 :         u.f = f;
      49                 :          49 :         return (u.bits.exp != 255);
      50                 :             : }
      51                 :             : 
      52                 :             : #ifdef OLM_LONG_DOUBLE
      53                 :             : OLM_DLLEXPORT int
      54                 :           0 : __isfinitel(long double e)
      55                 :             : {
      56                 :             :         union IEEEl2bits u;
      57                 :             : 
      58                 :           0 :         u.e = e;
      59                 :           0 :         return (u.bits.exp != 32767);
      60                 :             : }
      61                 :             : #endif