xref: /freebsd/lib/libc/softfloat/unorddf2.c (revision 8e95079e175854b84e57c521b34b4b52f7ae9cb1)
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 flag __unorddf2(float64, float64);
12 
13 flag
14 __unorddf2(float64 a, float64 b)
15 {
16 	/*
17 	 * The comparison is unordered if either input is a NaN.
18 	 * Test for this by comparing each operand with itself.
19 	 * We must perform both comparisons to correctly check for
20 	 * signalling NaNs.
21 	 */
22 	return 1 ^ (float64_eq(a, a) & float64_eq(b, b));
23 }
24