1 /*
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
5 * Copyright (c) 2026 Jesús Blázquez <jesuscblazquez@gmail.com>
6 * All rights reserved.
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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <math.h>
31
32 #include "fpmath.h"
33
34 #ifdef USE_BUILTIN_FMINIMUMF
35 float
fminimumf(float x,float y)36 fminimumf(float x, float y)
37 {
38 return (__builtin_fminimumf(x, y));
39 }
40 #else
41 float
fminimumf(float x,float y)42 fminimumf(float x, float y)
43 {
44 union IEEEf2bits u[2];
45
46 u[0].f = x;
47 u[1].f = y;
48
49 /* Check for NaNs to avoid raising spurious exceptions. */
50 if (u[0].bits.exp == 255 && u[0].bits.man != 0 ||
51 u[1].bits.exp == 255 && u[1].bits.man != 0)
52 return (NAN);
53
54 /* Handle comparisons of signed zeroes. */
55 if (u[0].bits.sign != u[1].bits.sign)
56 return (u[u[1].bits.sign].f);
57
58 return (x < y ? x : y);
59 }
60 #endif
61
62