Home | History | Annotate | Line # | Download | only in src 
      1 /*	$NetBSD: s_fabsl.c,v 1.8 2024/04/02 18:40:50 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2010 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 #include <sys/cdefs.h>
     29 __RCSID("$NetBSD: s_fabsl.c,v 1.8 2024/04/02 18:40:50 christos Exp $");
     30 
     31 #include <math.h>
     32 #include <machine/ieee.h>
     33 
     34 /*
     35  * fabsl(long double x)
     36  * This function returns the absolute value of its argument x, |x|.
     37  */
     38 #ifdef __HAVE_LONG_DOUBLE
     39 long double
     40 fabsl(long double x)
     41 {
     42 	union ieee_ext_u ux;
     43 
     44 	ux.extu_ld = x;
     45 	ux.extu_ext.ext_sign = 0;
     46 
     47 	return (ux.extu_ld);
     48 }
     49 #else
     50 #if 0
     51 /* defined in libc */
     52 long double
     53 fabsl(long double x)
     54 {
     55 	return fabs(x);
     56 }
     57 #endif
     58 #endif
     59