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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                 :             : 
      27                 :             : #include "cdefs-compat.h"
      28                 :             : //__FBSDID("$FreeBSD: src/lib/msun/src/s_nearbyint.c,v 1.2 2008/01/14 02:12:06 das Exp $");
      29                 :             : 
      30                 :             : #include <openlibm_fenv.h>
      31                 :             : #include <openlibm_math.h>
      32                 :             : 
      33                 :             : #include "math_private.h"
      34                 :             : 
      35                 :             : /*
      36                 :             :  * We save and restore the floating-point environment to avoid raising
      37                 :             :  * an inexact exception.  We can get away with using fesetenv()
      38                 :             :  * instead of feclearexcept()/feupdateenv() to restore the environment
      39                 :             :  * because the only exception defined for rint() is overflow, and
      40                 :             :  * rounding can't overflow as long as emax >= p.
      41                 :             :  */
      42                 :             : #define DECL(type, fn, rint)    \
      43                 :             : OLM_DLLEXPORT type                              \
      44                 :             : fn(type x)                      \
      45                 :             : {                               \
      46                 :             :         type ret;               \
      47                 :             :         fenv_t env;             \
      48                 :             :                                 \
      49                 :             :         fegetenv(&env);             \
      50                 :             :         ret = rint(x);          \
      51                 :             :         fesetenv(&env);             \
      52                 :             :         return (ret);           \
      53                 :             : }
      54                 :             : 
      55                 :           9 : DECL(double, nearbyint, rint)
      56                 :           9 : DECL(float, nearbyintf, rintf)