NetBSD-5.0.2/lib/libc/softfloat/unorddf2.c

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/* $NetBSD: unorddf2.c,v 1.1 2003/05/06 08:58:19 rearnsha Exp $ */

/*
 * Written by Richard Earnshaw, 2003.  This file is in the Public Domain.
 */

#include "softfloat-for-gcc.h"
#include "milieu.h"
#include "softfloat.h"

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: unorddf2.c,v 1.1 2003/05/06 08:58:19 rearnsha Exp $");
#endif /* LIBC_SCCS and not lint */

flag __unorddf2(float64, float64);

flag
__unorddf2(float64 a, float64 b)
{
	/*
	 * The comparison is unordered if either input is a NaN.
	 * Test for this by comparing each operand with itself.
	 * We must perform both comparisons to correctly check for
	 * signalling NaNs.
	 */
	return 1 ^ (float64_eq(a, a) & float64_eq(b, b));
}