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glibc  2.9
s_fabs.c
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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 "math_private.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 }
00036 weak_alias (__fabs, fabs)
00037 #ifdef NO_LONG_DOUBLE
00038 strong_alias (__fabs, __fabsl)
00039 weak_alias (__fabs, fabsl)
00040 #endif