00001 // 00002 // Copyright (c) 2005-2008 Kenichi Watanabe. 00003 // Copyright (c) 2005-2008 Yasuhiro Watari. 00004 // Copyright (c) 2005-2008 Hironori Ichibayashi. 00005 // Copyright (c) 2008-2009 Kazuo Horio. 00006 // Copyright (c) 2009-2013 Naruki Kurata. 00007 // Copyright (c) 2005-2013 Ryota Shioya. 00008 // Copyright (c) 2005-2013 Masahiro Goshima. 00009 // 00010 // This software is provided 'as-is', without any express or implied 00011 // warranty. In no event will the authors be held liable for any damages 00012 // arising from the use of this software. 00013 // 00014 // Permission is granted to anyone to use this software for any purpose, 00015 // including commercial applications, and to alter it and redistribute it 00016 // freely, subject to the following restrictions: 00017 // 00018 // 1. The origin of this software must not be misrepresented; you must not 00019 // claim that you wrote the original software. If you use this software 00020 // in a product, an acknowledgment in the product documentation would be 00021 // appreciated but is not required. 00022 // 00023 // 2. Altered source versions must be plainly marked as such, and must not be 00024 // misrepresented as being the original software. 00025 // 00026 // 3. This notice may not be removed or altered from any source 00027 // distribution. 00028 // 00029 // 00030 00031 00032 #ifndef __EMULATORUTILITY_DECODERUTILITY_H__ 00033 #define __EMULATORUTILITY_DECODERUTILITY_H__ 00034 00035 namespace Onikiri { 00036 namespace EmulatorUtility { 00037 00038 // begin rbg (LSB=0) beginrbglen bito 00039 // sexttruegs 00040 template <typename T> 00041 T ExtractBits(T value, int begin, int len, bool sext = false) 00042 { 00043 T result = (value >> begin) & ~(~(T)0 << len); 00044 // sign extend 00045 if (sext && (result & ((T)1 << (len-1)))) 00046 result |= ~0 << len; 00047 return result; 00048 } 00049 00050 } // namespace PPC64Linux 00051 } // namespace Onikiri 00052 00053 #endif