1*e55db843SJesús Blázquez /*
2*e55db843SJesús Blázquez * SPDX-License-Identifier: BSD-2-Clause
3*e55db843SJesús Blázquez *
4*e55db843SJesús Blázquez * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
5*e55db843SJesús Blázquez * Copyright (c) 2026 Jesús Blázquez <jesuscblazquez@gmail.com>
6*e55db843SJesús Blázquez * All rights reserved.
7*e55db843SJesús Blázquez *
8*e55db843SJesús Blázquez * Redistribution and use in source and binary forms, with or without
9*e55db843SJesús Blázquez * modification, are permitted provided that the following conditions
10*e55db843SJesús Blázquez * are met:
11*e55db843SJesús Blázquez * 1. Redistributions of source code must retain the above copyright
12*e55db843SJesús Blázquez * notice, this list of conditions and the following disclaimer.
13*e55db843SJesús Blázquez * 2. Redistributions in binary form must reproduce the above copyright
14*e55db843SJesús Blázquez * notice, this list of conditions and the following disclaimer in the
15*e55db843SJesús Blázquez * documentation and/or other materials provided with the distribution.
16*e55db843SJesús Blázquez *
17*e55db843SJesús Blázquez * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18*e55db843SJesús Blázquez * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19*e55db843SJesús Blázquez * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20*e55db843SJesús Blázquez * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21*e55db843SJesús Blázquez * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22*e55db843SJesús Blázquez * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23*e55db843SJesús Blázquez * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24*e55db843SJesús Blázquez * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25*e55db843SJesús Blázquez * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26*e55db843SJesús Blázquez * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27*e55db843SJesús Blázquez * SUCH DAMAGE.
28*e55db843SJesús Blázquez */
29*e55db843SJesús Blázquez
30*e55db843SJesús Blázquez #include <math.h>
31*e55db843SJesús Blázquez
32*e55db843SJesús Blázquez #include "fpmath.h"
33*e55db843SJesús Blázquez
34*e55db843SJesús Blázquez #ifdef USE_BUILTIN_FMINIMUMF
35*e55db843SJesús Blázquez float
fminimumf(float x,float y)36*e55db843SJesús Blázquez fminimumf(float x, float y)
37*e55db843SJesús Blázquez {
38*e55db843SJesús Blázquez return (__builtin_fminimumf(x, y));
39*e55db843SJesús Blázquez }
40*e55db843SJesús Blázquez #else
41*e55db843SJesús Blázquez float
fminimumf(float x,float y)42*e55db843SJesús Blázquez fminimumf(float x, float y)
43*e55db843SJesús Blázquez {
44*e55db843SJesús Blázquez union IEEEf2bits u[2];
45*e55db843SJesús Blázquez
46*e55db843SJesús Blázquez u[0].f = x;
47*e55db843SJesús Blázquez u[1].f = y;
48*e55db843SJesús Blázquez
49*e55db843SJesús Blázquez /* Check for NaNs to avoid raising spurious exceptions. */
50*e55db843SJesús Blázquez if (u[0].bits.exp == 255 && u[0].bits.man != 0 ||
51*e55db843SJesús Blázquez u[1].bits.exp == 255 && u[1].bits.man != 0)
52*e55db843SJesús Blázquez return (NAN);
53*e55db843SJesús Blázquez
54*e55db843SJesús Blázquez /* Handle comparisons of signed zeroes. */
55*e55db843SJesús Blázquez if (u[0].bits.sign != u[1].bits.sign)
56*e55db843SJesús Blázquez return (u[u[1].bits.sign].f);
57*e55db843SJesús Blázquez
58*e55db843SJesús Blázquez return (x < y ? x : y);
59*e55db843SJesús Blázquez }
60*e55db843SJesús Blázquez #endif
61*e55db843SJesús Blázquez
62