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      1 /* $NetBSD: unorddf2.c,v 1.1 2003/05/06 08:58:19 rearnsha Exp $ */
      2 /** @file
      3 *
      4 *  Copyright (c) 2013 - 2014, ARM Limited. All rights reserved.
      5 *
      6 *  This program and the accompanying materials
      7 *  are licensed and made available under the terms and conditions of the BSD License
      8 *  which accompanies this distribution.  The full text of the license may be found at
      9 *  http://opensource.org/licenses/bsd-license.php
     10 *
     11 *  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
     12 *  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
     13 *
     14 **/
     15 /*
     16  * Written by Richard Earnshaw, 2003.  This file is in the Public Domain.
     17  */
     18 
     19 #include "softfloat-for-gcc.h"
     20 #include "milieu.h"
     21 #include "softfloat.h"
     22 
     23 #include <sys/cdefs.h>
     24 #if defined(LIBC_SCCS) && !defined(lint)
     25 __RCSID("$NetBSD: unorddf2.c,v 1.1 2003/05/06 08:58:19 rearnsha Exp $");
     26 #endif /* LIBC_SCCS and not lint */
     27 
     28 flag __unorddf2(float64, float64);
     29 
     30 flag
     31 __unorddf2(float64 a, float64 b)
     32 {
     33     /*
     34      * The comparison is unordered if either input is a NaN.
     35      * Test for this by comparing each operand with itself.
     36      * We must perform both comparisons to correctly check for
     37      * signalling NaNs.
     38      */
     39     return 1 ^ (float64_eq(a, a) & float64_eq(b, b));
     40 }
     41