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 //__FBSDID("$FreeBSD: src/lib/msun/src/s_fmaxl.c,v 1.1 2004/06/30 07:04:01 das Exp $");
28
29
30 long double
fmaxl(long double x,long double y)31 fmaxl(long double x, long double y)
32 {
33 union IEEEl2bits u[2];
34
35 if (issignalingl_inline(x))
36 return x + x;
37 if (issignalingl_inline(y))
38 return y + y;
39
40 u[0].e = x;
41 mask_nbit_l(u[0]);
42 u[1].e = y;
43 mask_nbit_l(u[1]);
44
45 /* Check for NaNs to avoid raising spurious exceptions. */
46 if (u[0].bits.exp == LDBL_INF_NAN_EXP && (u[0].bits.manh | u[0].bits.manl) != 0)
47 return (y);
48 if (u[1].bits.exp == LDBL_INF_NAN_EXP && (u[1].bits.manh | u[1].bits.manl) != 0)
49 return (x);
50
51 /* Handle comparisons of signed zeroes. */
52 if (u[0].bits.sign != u[1].bits.sign)
53 return (u[0].bits.sign ? y : x);
54
55 return (x > y ? x : y);
56 }
57
