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 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