diff -r 000000000000 -r a41df078684a kernel/eka/euser/maths/um_log.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kernel/eka/euser/maths/um_log.cpp	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,66 @@
+// Copyright (c) 1995-2009 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\euser\maths\um_log.cpp
+// Floating point base 10 logarithm
+// 
+//
+
+#include "um_std.h"
+
+#if defined(__USE_VFP_MATH) && !defined(__CPU_HAS_VFP)
+#error	__USE_VFP_MATH was defined but not __CPU_HAS_VFP - impossible combination, check variant.mmh 
+#endif
+
+
+#ifndef __USE_VFP_MATH
+
+EXPORT_C TInt Math::Log(TReal &aTrg,const TReal &aSrc)
+/**
+Calculates the logarithm to base 10 of a number.
+
+@param aTrg  A reference containing the result. 
+@param aSrc  The number whose logarithm is required. 
+ 
+@return KErrNone if successful, otherwise another of
+        the system-wide error codes. 
+*/
+//
+// Base 10 log routine. See Software manual by W.J.Cody & W.Waite
+//
+	{
+
+	TInt ret=Math::Ln(aTrg,aSrc);
+	if (ret!=KErrNone)
+		return(ret);    	
+	aTrg*=KRln10;
+	return(ret);
+	}
+
+#else // __USE_VFP_MATH
+
+// definitions come from RVCT math library
+extern "C" TReal log10(TReal);
+
+EXPORT_C TInt Math::Log(TReal& aTrg, const TReal& aSrc)
+	{
+	aTrg = log10(aSrc);
+	if (Math::IsFinite(aTrg))
+		return KErrNone;
+	if (Math::IsInfinite(aTrg))
+		return KErrOverflow;
+	SetNaN(aTrg);
+	return KErrArgument;
+	}
+
+#endif