Index: uspace/softfloat/generic/comparison.c
===================================================================
--- uspace/softfloat/generic/comparison.c	(revision 0166e99928c90c6d2e990c69a7aaf84a6f93c6c0)
+++ uspace/softfloat/generic/comparison.c	(revision 0166e99928c90c6d2e990c69a7aaf84a6f93c6c0)
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2005 Josef Cejka
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup softfloat	
+ * @{
+ */
+/** @file
+ */
+
+#include<sftypes.h>
+#include<comparison.h>
+
+inline int isFloat32NaN(float32 f)
+{	/* NaN : exp = 0xff and nonzero fraction */
+	return ((f.parts.exp==0xFF)&&(f.parts.fraction));
+}
+
+inline int isFloat64NaN(float64 d)
+{	/* NaN : exp = 0x7ff and nonzero fraction */
+	return ((d.parts.exp==0x7FF)&&(d.parts.fraction));
+}
+
+inline int isFloat32SigNaN(float32 f)
+{	/* SigNaN : exp = 0xff fraction = 0xxxxx..x (binary), where at least one x is nonzero */
+	return ((f.parts.exp==0xFF)&&(f.parts.fraction<0x400000)&&(f.parts.fraction));
+}
+
+inline int isFloat64SigNaN(float64 d)
+{	/* SigNaN : exp = 0x7ff fraction = 0xxxxx..x (binary), where at least one x is nonzero */
+	return ((d.parts.exp==0x7FF)&&(d.parts.fraction)&&(d.parts.fraction<0x8000000000000ll));
+}
+
+inline int isFloat32Infinity(float32 f) 
+{
+	return ((f.parts.exp==0xFF)&&(f.parts.fraction==0x0));
+}
+
+inline int isFloat64Infinity(float64 d) 
+{
+	return ((d.parts.exp==0x7FF)&&(d.parts.fraction==0x0));
+}
+
+inline int isFloat32Zero(float32 f)
+{
+	return (((f.binary) & 0x7FFFFFFF) == 0);
+}
+
+inline int isFloat64Zero(float64 d)
+{
+	return (((d.binary) & 0x7FFFFFFFFFFFFFFFll) == 0);
+}
+
+/**
+ * @return 1, if both floats are equal - but NaNs are not recognized 
+ */
+inline int isFloat32eq(float32 a, float32 b)
+{
+	return ((a.binary==b.binary)||(((a.binary| b.binary)&0x7FFFFFFF)==0)); /* a equals to b or both are zeros (with any sign) */
+}
+
+/**
+ * @return 1, if a<b - but NaNs are not recognized 
+ */
+inline int isFloat32lt(float32 a, float32 b) 
+{
+	if (((a.binary| b.binary)&0x7FFFFFFF)==0) {
+		return 0; /* +- zeroes */
+	};
+	
+	if ((a.parts.sign)&&(b.parts.sign)) {
+		/*if both are negative, smaller is that with greater binary value*/
+		return (a.binary>b.binary);
+		};
+	
+	/* lets negate signs - now will be positive numbers allways bigger than negative (first bit will be set for unsigned integer comparison)*/
+	a.parts.sign=!a.parts.sign;
+	b.parts.sign=!b.parts.sign;
+	return (a.binary<b.binary);
+			
+}
+
+/**
+ * @return 1, if a>b - but NaNs are not recognized 
+ */
+inline int isFloat32gt(float32 a, float32 b) 
+{
+	if (((a.binary| b.binary)&0x7FFFFFFF)==0) {
+		return 0; /* zeroes are equal with any sign */
+	};
+	
+	if ((a.parts.sign)&&(b.parts.sign)) {
+		/*if both are negative, greater is that with smaller binary value*/
+		return (a.binary<b.binary);
+		};
+	
+	/* lets negate signs - now will be positive numbers allways bigger than negative (first bit will be set for unsigned integer comparison)*/
+	a.parts.sign=!a.parts.sign;
+	b.parts.sign=!b.parts.sign;
+	return (a.binary>b.binary);
+			
+}
+
+/** @}
+ */
