RTAI API: base/math/s_fabs.c Source File

00001 /* @(#)s_fabs.c 5.1 93/09/24 */ 00002 /* 00003 * ==================================================== 00004 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 00005 * 00006 * Developed at SunPro, a Sun Microsystems, Inc. business. 00007 * Permission to use, copy, modify, and distribute this 00008 * software is freely granted, provided that this notice 00009 * is preserved. 00010 * ==================================================== 00011 */ 00012 00013 #if defined(LIBM_SCCS) && !defined(lint) 00014 static char rcsid[] = "$NetBSD: s_fabs.c,v 1.7 1995/05/10 20:47:13 jtc Exp $"; 00015 #endif 00016 00017 /* 00018 * fabs(x) returns the absolute value of x. 00019 */ 00020 00021 #include "math.h" 00022 #include "mathP.h" 00023 00024 #ifdef __STDC__ 00025 double fabs(double x) 00026 #else 00027 double fabs(x) 00028 double x; 00029 #endif 00030 { 00031 u_int32_t high; 00032 GET_HIGH_WORD(high,x); 00033 SET_HIGH_WORD(x,high&0x7fffffff); 00034 return x; 00035 }