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 <sys/cdefs.h>
28 __RCSID("$NetBSD: s_fminl.c,v 1.4 2013/11/29 22:16:10 joerg Exp $");
29 #ifdef notdef
30 __FBSDID("$FreeBSD: src/lib/msun/src/s_fminl.c,v 1.1 2004/06/30 07:04:01 das Exp $");
31 #endif
32
33 #include <math.h>
34 #include <string.h>
35
36 #include <machine/ieee.h>
37 #ifdef __HAVE_LONG_DOUBLE
38 long double
fminl(long double x,long double y)39 fminl(long double x, long double y)
40 {
41 union ieee_ext_u u[2];
42
43 memset(&u, 0, sizeof u);
44 u[0].extu_ld = x;
45 u[0].extu_ext.ext_frach &= ~0x80000000;
46 u[1].extu_ld = y;
47 u[1].extu_ext.ext_frach &= ~0x80000000;
48
49 /* Check for NaNs to avoid raising spurious exceptions. */
50 if (u[0].extu_ext.ext_exp == EXT_EXP_INFNAN &&
51 (u[0].extu_ext.ext_frach | u[0].extu_ext.ext_fracl) != 0)
52 return (y);
53 if (u[1].extu_ext.ext_exp == EXT_EXP_INFNAN &&
54 (u[1].extu_ext.ext_frach | u[1].extu_ext.ext_fracl) != 0)
55 return (x);
56
57 /* Handle comparisons of ext_signed zeroes. */
58 if (u[0].extu_ext.ext_sign != u[1].extu_ext.ext_sign)
59 return (u[1].extu_ext.ext_sign ? y : x);
60
61 return (x < y ? x : y);
62 }
63 #endif
64