--- a/kernel/eka/nkern/nklib.cpp Tue Aug 31 16:34:26 2010 +0300
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,135 +0,0 @@
-// 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);
- }
- }
-
-
-