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      1 /* $NetBSD: unorddf2.c,v 1.1 2003/05/06 08:58:19 rearnsha Exp $ */
      2 
      3 /*
      4  * Written by Richard Earnshaw, 2003.  This file is in the Public Domain.
      5  */
      6 
      7 #include "softfloat-for-gcc.h"
      8 #include "milieu.h"
      9 #include "softfloat.h"
     10 
     11 #include <sys/cdefs.h>
     12 #if defined(LIBC_SCCS) && !defined(lint)
     13 __RCSID("$NetBSD: unorddf2.c,v 1.1 2003/05/06 08:58:19 rearnsha Exp $");
     14 #endif /* LIBC_SCCS and not lint */
     15 
     16 flag __unorddf2(float64, float64);
     17 
     18 flag
     19 __unorddf2(float64 a, float64 b)
     20 {
     21 	/*
     22 	 * The comparison is unordered if either input is a NaN.
     23 	 * Test for this by comparing each operand with itself.
     24 	 * We must perform both comparisons to correctly check for
     25 	 * signalling NaNs.
     26 	 */
     27 	return 1 ^ (float64_eq(a, a) & float64_eq(b, b));
     28 }
     29