lib/libm/src/s_fabs.c

   1 /* @(#)s_fabs.c 5.1 93/09/24 */
   2 /*
   3  * ====================================================
   4  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
   5  *
   6  * Developed at SunPro, a Sun Microsystems, Inc. business.
   7  * Permission to use, copy, modify, and distribute this
   8  * software is freely granted, provided that this notice
   9  * is preserved.
  10  * ====================================================
  11  */
  12
  13 #include <sys/cdefs.h>
  14 #if defined(LIBM_SCCS) && !defined(lint)
  15 __RCSID("$NetBSD: s_fabs.c,v 1.11 2013/11/29 22:16:10 joerg Exp $");
  16 #endif
  17
  18 /*
  19  * fabs(x) returns the absolute value of x.
  20  */
  21
  22 #include "math.h"
  23 #include "math_private.h"
  24
  25 #ifndef __HAVE_LONG_DOUBLE
  26 __strong_alias(fabsl, fabs)
  27 #endif
  28
  29 double
  30 fabs(double x)
  31 {
  32         u_int32_t high;
  33         GET_HIGH_WORD(high,x);
  34         SET_HIGH_WORD(x,high&0x7fffffff);
  35         return x;
  36 }