2 * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
26 * $NetBSD: s_fmin.c,v 1.1 2009/10/04 22:04:30 christos Exp $
31 #include <machine/ieee.h>
34 fmin(double x, double y)
36 union ieee_double_u u[2];
41 /* Check for NaNs to avoid raising spurious exceptions. */
42 if (u[0].dblu_dbl.dbl_exp == DBL_EXP_INFNAN &&
43 (u[0].dblu_dbl.dbl_frach | u[0].dblu_dbl.dbl_fracl) != 0)
45 if (u[1].dblu_dbl.dbl_exp == DBL_EXP_INFNAN &&
46 (u[1].dblu_dbl.dbl_frach | u[1].dblu_dbl.dbl_fracl) != 0)
49 /* Handle comparisons of signed zeroes. */
50 if (u[0].dblu_dbl.dbl_sign != u[1].dblu_dbl.dbl_sign)
51 return (u[u[1].dblu_dbl.dbl_sign].dblu_d);
53 return (x < y ? x : y);