1 /* $OpenBSD: fabs.c,v 1.7 2009/04/05 17:21:46 martynas 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 #include <sys/cdefs.h> 20 #if !defined(__SH4__) || defined(__SH4_NOFPU__) 21 #include <sys/types.h> 22 #include <machine/ieee.h> 23 #endif /* !defined(__SH4__) || defined(__SH4_NOFPU__) */ 24 25 #include <math.h> 26 27 double 28 fabs(double d) 29 { 30 #if defined(__SH4__) && !defined(__SH4_NOFPU__) 31 __asm__ __volatile__("fabs %0" : "+f" (d)); 32 #else 33 struct ieee_double *p = (struct ieee_double *)&d; 34 35 p->dbl_sign = 0; 36 #endif 37 return (d); 38 } 39 40 __weak_alias(fabsl, fabs); 41