1 /* $OpenBSD: fabs.c,v 1.2 2006/11/06 15:14:50 drahn 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 <math.h> 20 21 double 22 fabs(double x) 23 { 24 #ifdef __SH4__ 25 __asm__ __volatile__("fabs %0" : "=f"(x)); 26 #else 27 if (x < 0) 28 x = -x; 29 #endif 30 return (x); 31 } 32