52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef _HPPA_MUL_H_
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#define _HPPA_MUL_H_
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#include "Fundamentals.h"
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enum MultiplicationOperation
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{
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maZero, // total = 0
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maMultiplicand, // total = multiplicand
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maShiftValue, // total = value << shiftBy
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maAddValueToShiftMultiplicand, // total = value + (multiplicand << shiftBy)
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maSubShiftMultiplicandFromValue, // total = value - (multiplicand << shiftBy)
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maAddValueToShiftValue, // total = (value << shiftBy) + value
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maSubValueFromShiftValue, // total = (value << shiftBy) - value
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maAddMultiplicandToShiftValue, // total = (value << shiftBy) + multiplicand
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maSubMultiplicandFromShiftValue, // total = (value << shiftBy) - multiplicand
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};
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struct MulAlgorithm
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{
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PRInt16 cost;
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PRUint16 nOperations;
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MultiplicationOperation operations[32];
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PRUint8 shiftAmount[32];
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};
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extern bool getMulAlgorithm(MulAlgorithm* algorithm, PRUint32 multiplicand, PRInt16 maxCost);
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#endif /* _HPPA_MUL_H_ */
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