ArmPkg/Library/ArmSoftFloatLib/Arm/__aeabi_dcmpun.c

   1 /* $NetBSD: __aeabi_dcmpun.c,v 1.1 2013/04/16 10:37:39 matt Exp $ */
   2
   3 /** @file
   4 *
   5 *  Copyright (c) 2013 - 2014, ARM Limited. All rights reserved.
   6 *
   7 *  This program and the accompanying materials
   8 *  are licensed and made available under the terms and conditions of the BSD License
   9 *  which accompanies this distribution.  The full text of the license may be found at
  10 *  http://opensource.org/licenses/bsd-license.php
  11 *
  12 *  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  13 *  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  14 *
  15 **/
  16
  17 /*
  18  * Written by Richard Earnshaw, 2003.  This file is in the Public Domain.
  19  */
  20
  21 #include "softfloat-for-gcc.h"
  22 #include "milieu.h"
  23 #include "softfloat.h"
  24
  25 #if defined(LIBC_SCCS) && !defined(lint)
  26 __RCSID("$NetBSD: __aeabi_dcmpun.c,v 1.1 2013/04/16 10:37:39 matt Exp $");
  27 #endif /* LIBC_SCCS and not lint */
  28
  29 int __aeabi_dcmpun(float64, float64);
  30
  31 int
  32 __aeabi_dcmpun(float64 a, float64 b)
  33 {
  34     /*
  35      * The comparison is unordered if either input is a NaN.
  36      * Test for this by comparing each operand with itself.
  37      * We must perform both comparisons to correctly check for
  38      * signalling NaNs.
  39      */
  40     return !float64_eq(a, a) || !float64_eq(b, b);
  41 }