--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/nkern/nklib.cpp	Tue Aug 31 16:34:26 2010 +0300
@@ -0,0 +1,135 @@
+// Copyright (c) 2010-2010 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// e32\nkern\nklib.cpp
+// 
+//
+
+#include <e32atomics.h>
+#include <nklib.h>
+
+#ifndef __SRATIO_MACHINE_CODED__
+void SRatio::Set(TUint32 aInt, TInt aDivisorExp)
+	{
+	iSpare1 = 0;
+	iSpare2 = 0;
+	iM = aInt;
+	if (iM)
+		{
+		TInt ms1 = __e32_find_ms1_32(iM);
+		TInt shift = 31 - ms1;
+		iM <<= shift;
+		iX = (TInt16)(-shift - aDivisorExp);
+		}
+	else
+		iX = 0;
+	}
+
+TInt SRatio::Reciprocal()
+	{
+	if (iM==0)
+		return KErrDivideByZero;
+	// Calculate 2^32/iM
+	TInt exp=0;
+	if (iM == 0x80000000u)
+		{
+		// ratio = 2^(31+iX) so reciprocal = 2^(-31-iX) = 2^(31 + (-62-iX))
+		exp = -62-iX;
+		}
+	else
+		{
+		// 2^32/iM = 1.xxx
+		TUint64 r64 = MAKE_TUINT64(0u-iM,0);
+		TUint32 q32 = (TUint32)(r64/TUint64(iM));	// next 32 bits of result
+		iM = 0x80000000u | (q32>>1);
+		exp = -63-iX;
+		if (q32 & 1)
+			{
+			if (++iM==0)
+				iM=0x80000000u, ++exp;
+			}
+		}
+	if (exp < -32768)
+		{
+		iM = 0;
+		iX = 0;
+		return KErrUnderflow;
+		}
+	if (exp > 32767)
+		{
+		iM = 0xffffffffu;
+		iX = 32767;
+		return KErrOverflow;
+		}
+	iX = (TInt16)exp;
+	return KErrNone;
+	}
+
+TInt SRatio::Mult(TUint32& aInt32)
+	{
+	TUint64 x = aInt32;
+	x *= TUint64(iM);
+	if (x==0)
+		{
+		aInt32 = 0;
+		return KErrNone;
+		}
+	TInt ms1 = __e32_find_ms1_64(x);
+	TInt ms1b = ms1 + iX;
+	if (ms1b>=32)
+		{
+		aInt32 = ~0u;
+		return KErrOverflow;
+		}
+	if (ms1b<-1)
+		{
+		aInt32 = 0;
+		return KErrUnderflow;
+		}
+	TInt shift = ms1b - ms1 + 31;
+	if (shift > 0)
+		x <<= shift;
+	else if (shift < 0)
+		x >>= (-shift);
+	x += MAKE_TUINT64(0,0x40000000u);
+	if (x >> 63)
+		{
+		aInt32 = ~0u;
+		return KErrOverflow;
+		}
+	aInt32 = (TUint32)(x>>31);
+	return aInt32 ? KErrNone : KErrUnderflow;
+	}
+
+//TInt SRatio::Mult(TUint64& aInt64)
+//	{
+//	}
+#endif
+
+void SRatioInv::Set(const SRatio* a)
+	{
+	if (a)
+		{
+		iR = *a;
+		iI = iR;
+		iI.Reciprocal();
+		}
+	else
+		{
+		iR.Set(1);
+		iI.Set(1);
+		}
+	}
+
+
+