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/*******************************************************************************
* Copyright 2003-2018 Intel Corporation
* All Rights Reserved.
*
* If this software was obtained under the Intel Simplified Software License,
* the following terms apply:
*
* The source code, information and material ("Material") contained herein is
* owned by Intel Corporation or its suppliers or licensors, and title to such
* Material remains with Intel Corporation or its suppliers or licensors. The
* Material contains proprietary information of Intel or its suppliers and
* licensors. The Material is protected by worldwide copyright laws and treaty
* provisions. No part of the Material may be used, copied, reproduced,
* modified, published, uploaded, posted, transmitted, distributed or disclosed
* in any way without Intel's prior express written permission. No license under
* any patent, copyright or other intellectual property rights in the Material
* is granted to or conferred upon you, either expressly, by implication,
* inducement, estoppel or otherwise. Any license under such intellectual
* property rights must be express and approved by Intel in writing.
*
* Unless otherwise agreed by Intel in writing, you may not remove or alter this
* notice or any other notice embedded in Materials by Intel or Intel's
* suppliers or licensors in any way.
*
*
* If this software was obtained under the Apache License, Version 2.0 (the
* "License"), the following terms apply:
*
* You may not use this file except in compliance with the License. You may
* obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
*
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
/*
// Contents:
// cpMontExp_WinSize()
//
*/
#include "owndefs.h"
#include "owncp.h"
#include "pcpbn.h"
#include "pcpmontgomery.h"
#include "gsscramble.h"
#if !defined(_USE_WINDOW_EXP_)
cpSize cpMontExp_WinSize(int bitsize)
{
UNREFERENCED_PARAMETER(bitsize);
return 1;
}
#else
/*
// returns (optimal) window width
// Because of safety Window width depend on CACHE LINE size:
// P4,EM64T, ITP - 64 bytes
// XScale - 32 bytes
// Blend - no cache
*/
#if !((_IPP==_IPP_W7) || (_IPP==_IPP_T7) || \
(_IPP==_IPP_V8) || (_IPP==_IPP_P8) || \
(_IPP==_IPP_S8) || (_IPP>=_IPP_G9) || \
(_IPP32E==_IPP32E_M7) || \
(_IPP32E==_IPP32E_U8) || (_IPP32E==_IPP32E_Y8) || \
(_IPP32E==_IPP32E_N8) || (_IPP32E>=_IPP32E_E9))
cpSize cpMontExp_WinSize(int bitsize)
{
UNREFERENCED_PARAMETER(bitsize);
return 1;
}
#endif
#if ((_IPP==_IPP_W7) || (_IPP==_IPP_T7) || \
(_IPP==_IPP_V8) || (_IPP==_IPP_P8) || \
(_IPP==_IPP_S8) || (_IPP>=_IPP_G9) || \
(_IPP32E==_IPP32E_M7) || \
(_IPP32E==_IPP32E_U8) || (_IPP32E==_IPP32E_Y8) || \
(_IPP32E==_IPP32E_N8) || (_IPP32E>=_IPP32E_E9))
cpSize cpMontExp_WinSize(int bitsize)
{
return
//bitsize>3715? 8 : /*limited by 6 or 4 (LOG_CACHE_LINE_SIZE); we use it for windowing-exp imtigation */
//bitsize>1434? 7 :
#if (_IPP !=_IPP_M5)
bitsize> 539? 6 :
bitsize> 197? 5 :
#endif
bitsize> 70? 4 :
bitsize> 25? 3 :
bitsize> 9? 2 : 1;
}
#endif
#endif /* _USE_WINDOW_EXP_ */
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