1 /******************************************************************************* 2 * Copyright 2003-2018 Intel Corporation 3 * All Rights Reserved. 4 * 5 * If this software was obtained under the Intel Simplified Software License, 6 * the following terms apply: 7 * 8 * The source code, information and material ("Material") contained herein is 9 * owned by Intel Corporation or its suppliers or licensors, and title to such 10 * Material remains with Intel Corporation or its suppliers or licensors. The 11 * Material contains proprietary information of Intel or its suppliers and 12 * licensors. The Material is protected by worldwide copyright laws and treaty 13 * provisions. No part of the Material may be used, copied, reproduced, 14 * modified, published, uploaded, posted, transmitted, distributed or disclosed 15 * in any way without Intel's prior express written permission. No license under 16 * any patent, copyright or other intellectual property rights in the Material 17 * is granted to or conferred upon you, either expressly, by implication, 18 * inducement, estoppel or otherwise. Any license under such intellectual 19 * property rights must be express and approved by Intel in writing. 20 * 21 * Unless otherwise agreed by Intel in writing, you may not remove or alter this 22 * notice or any other notice embedded in Materials by Intel or Intel's 23 * suppliers or licensors in any way. 24 * 25 * 26 * If this software was obtained under the Apache License, Version 2.0 (the 27 * "License"), the following terms apply: 28 * 29 * You may not use this file except in compliance with the License. You may 30 * obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 31 * 32 * 33 * Unless required by applicable law or agreed to in writing, software 34 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 35 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 36 * 37 * See the License for the specific language governing permissions and 38 * limitations under the License. 39 *******************************************************************************/ 40 41 /* 42 // Contents: 43 // cpMontExp_WinSize() 44 // 45 */ 46 47 #include "owndefs.h" 48 #include "owncp.h" 49 #include "pcpbn.h" 50 #include "pcpmontgomery.h" 51 #include "gsscramble.h" 52 53 54 #if !defined(_USE_WINDOW_EXP_) 55 cpSize cpMontExp_WinSize(int bitsize) 56 { 57 UNREFERENCED_PARAMETER(bitsize); 58 return 1; 59 } 60 61 #else 62 /* 63 // returns (optimal) window width 64 // Because of safety Window width depend on CACHE LINE size: 65 // P4,EM64T, ITP - 64 bytes 66 // XScale - 32 bytes 67 // Blend - no cache 68 */ 69 #if !((_IPP==_IPP_W7) || (_IPP==_IPP_T7) || \ 70 (_IPP==_IPP_V8) || (_IPP==_IPP_P8) || \ 71 (_IPP==_IPP_S8) || (_IPP>=_IPP_G9) || \ 72 (_IPP32E==_IPP32E_M7) || \ 73 (_IPP32E==_IPP32E_U8) || (_IPP32E==_IPP32E_Y8) || \ 74 (_IPP32E==_IPP32E_N8) || (_IPP32E>=_IPP32E_E9)) 75 cpSize cpMontExp_WinSize(int bitsize) 76 { 77 UNREFERENCED_PARAMETER(bitsize); 78 return 1; 79 } 80 #endif 81 82 #if ((_IPP==_IPP_W7) || (_IPP==_IPP_T7) || \ 83 (_IPP==_IPP_V8) || (_IPP==_IPP_P8) || \ 84 (_IPP==_IPP_S8) || (_IPP>=_IPP_G9) || \ 85 (_IPP32E==_IPP32E_M7) || \ 86 (_IPP32E==_IPP32E_U8) || (_IPP32E==_IPP32E_Y8) || \ 87 (_IPP32E==_IPP32E_N8) || (_IPP32E>=_IPP32E_E9)) 88 cpSize cpMontExp_WinSize(int bitsize) 89 { 90 return 91 //bitsize>3715? 8 : /*limited by 6 or 4 (LOG_CACHE_LINE_SIZE); we use it for windowing-exp imtigation */ 92 //bitsize>1434? 7 : 93 #if (_IPP !=_IPP_M5) 94 bitsize> 539? 6 : 95 bitsize> 197? 5 : 96 #endif 97 bitsize> 70? 4 : 98 bitsize> 25? 3 : 99 bitsize> 9? 2 : 1; 100 } 101 #endif 102 103 #endif /* _USE_WINDOW_EXP_ */ 104
