1 /* $OpenBSD: fabs.c,v 1.12 2014/04/18 15:09:52 guenther Exp $ */
2 /*
3 * Copyright (c) 2006 Miodrag Vallat.
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice, this permission notice, and the disclaimer below
8 * appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #if !defined(__SH4__) || defined(__SH4_NOFPU__)
20 #include <sys/types.h>
21 #include <machine/ieee.h>
22 #endif /* !defined(__SH4__) || defined(__SH4_NOFPU__) */
23
24 #include <math.h>
25
26 double
fabs(double d)27 fabs(double d)
28 {
29 #if defined(__SH4__) && !defined(__SH4_NOFPU__)
30 __asm__ volatile("fabs %0" : "+f" (d));
31 #else
32 struct ieee_double *p = (struct ieee_double *)&d;
33
34 p->dbl_sign = 0;
35 #endif
36 return (d);
37 }
38
39 __strong_alias(fabsl, fabs);
40