1 /*-
2 * Copyright (c) 2013 The NetBSD Foundation, Inc.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Matt Thomas of 3am Software Foundry.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 #if defined(LIBC_SCCS) && !defined(lint)
32 __RCSID("$NetBSD: __aeabi_fcmpun.c,v 1.1 2013/01/26 07:04:22 matt Exp $");
33 #endif /* LIBC_SCCS and not lint */
34
35 #include <arm/aeabi.h>
36 #include <arm/ieee.h>
37
38 #include <math.h>
39
40 /*
41 * result (1, 0) denotes (?, <=>) [2], use for C99 isunordered()
42 */
43
44 int
__aeabi_fcmpun(float x,float y)45 __aeabi_fcmpun(float x, float y)
46 {
47 const union ieee_single_u ux = { .sngu_f = x };
48 const union ieee_single_u uy = { .sngu_f = y };
49
50 return (ux.sngu_sng.sng_exp == SNG_EXP_INFNAN
51 && ux.sngu_sng.sng_frac != 0)
52 || (uy.sngu_sng.sng_exp == SNG_EXP_INFNAN
53 && uy.sngu_sng.sng_frac != 0);
54 }
55