s_fmaxf.c - vx32 - Local 9vx git repository for patches.
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       ---
       s_fmaxf.c (1834B)
       ---
            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 <math.h>
           28 
           29 #include "math_private.h"
           30 
           31 float
           32 fmaxf(float x, float y)
           33 {
           34         union IEEEf2bits u[2];
           35 
           36         u[0].f = x;
           37         u[1].f = y;
           38 
           39         /* Check for NaNs to avoid raising spurious exceptions. */
           40         if (u[0].bits.exp == 255 && u[0].bits.man != 0)
           41                 return (y);
           42         if (u[1].bits.exp == 255 && u[1].bits.man != 0)
           43                 return (x);
           44 
           45         /* Handle comparisons of signed zeroes. */
           46         if (u[0].bits.sign != u[1].bits.sign)
           47                 return (u[u[0].bits.sign].f);
           48 
           49         return (x > y ? x : y);
           50 }