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1 /* |
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2 * Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Fixed point arithmetics |
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15 * |
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16 */ |
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17 |
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18 |
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19 |
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20 #ifndef __HUIFIXMATH_H__ |
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21 #define __HUIFIXMATH_H__ |
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22 |
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23 #include <e32def.h> |
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24 |
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25 static const TInt KFixPi = 0x3243F; |
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26 |
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27 |
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28 class HuiFixMath |
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29 { |
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30 public: |
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31 IMPORT_C static TUint FixHypot(TInt aVal1,TInt aVal2); |
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32 IMPORT_C static TInt FixSin(TInt aRadians); |
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33 IMPORT_C static TInt FixCos(TInt aRadians); |
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34 |
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35 static inline TInt FixMul(TInt aVal1, TInt aVal2); |
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36 static inline TInt FixDiv(TInt aVal1, TInt aVal2); |
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37 static inline TInt FloatToFix(TReal32 aVal); |
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38 static inline TReal32 FixToFloat(TInt aVal); |
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39 }; |
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40 |
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41 TInt HuiFixMath::FixMul(TInt aVal1, TInt aVal2) |
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42 { |
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43 TInt64 result = (TInt64(aVal1))*(TInt64(aVal2)); |
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44 return TInt(result>>16); |
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45 }; |
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46 |
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47 TInt HuiFixMath::FixDiv(TInt aVal1, TInt aVal2) |
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48 { |
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49 TUint64 temp = aVal1; |
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50 temp<<=16; |
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51 return TInt(temp/aVal2); |
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52 }; |
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53 |
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54 TInt HuiFixMath::FloatToFix(TReal32 aVal) |
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55 { |
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56 return TInt(aVal*65536.0f); |
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57 } |
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58 |
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59 TReal32 HuiFixMath::FixToFloat(TInt aVal) |
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60 { |
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61 return TReal32((TReal32(aVal))/65536.0f); |
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62 } |
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63 |
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64 |
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65 #endif |