src/Sim/Memory/AddrHasher.h

説明を見る。
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 SIM_MEMORY_ADR_HASHER_H
00033 #define SIM_MEMORY_ADR_HASHER_H
00034 
00035 #include "Lib/shttl/hasher.h"
00036 #include "Interface/Addr.h"
00037 
00038 namespace Onikiri
00039 {
00040     class AdrHasher : public shttl::hasher<Addr>
00041     {
00042     public:
00043         // --
00044 
00045         typedef shttl::hasher<Addr> base_type;
00046         typedef AdrHasher           this_type;
00047 
00048         typedef base_type::size_type size_type;
00049         typedef Addr value_type;
00050 
00051         static const std::numeric_limits<u64> value_info;
00052 
00053     private:
00054         size_type   m_idx_bit;
00055         u64         m_idx_mask;
00056         size_type   m_off_bit;
00057         u64         m_off_mask;
00058 
00059     public:
00060 
00061         // size() returns maximum value of index()
00062         size_type size() const 
00063         {
00064             return (size_type)(m_idx_mask + 1); 
00065         }
00066 
00067         // Constructor(s)
00068         explicit AdrHasher(
00069             const size_type idx_bit_arg, 
00070             const size_type off_bit_arg
00071         ) :
00072             m_idx_bit ( idx_bit_arg ), 
00073             m_idx_mask( shttl::mask(0, idx_bit_arg) ),
00074             m_off_bit ( off_bit_arg ), 
00075             m_off_mask( shttl::mask(0, off_bit_arg ) 
00076         ){
00077             if( ( (size_type)value_info.digits < m_idx_bit ) ||
00078                 ( (size_type)value_info.digits < m_off_bit ) ||
00079                 ( (size_type)value_info.digits < m_idx_bit + m_off_bit )
00080             ){
00081                 throw std::invalid_argument("AdrHasher::AdrHasher");
00082             }
00083         }
00084 
00085         ~AdrHasher() 
00086         {
00087         }
00088 
00089         // Member Functions
00090         size_type index(const value_type& t) const 
00091         {
00092             return (size_type)((t.address >> m_off_bit) & m_idx_mask);
00093         }
00094 
00095         value_type tag(const value_type& t) const
00096         {
00097             value_type adr(t);
00098             adr.address >>= (m_off_bit+m_idx_bit);
00099             return adr;
00100         }
00101 
00102         value_type rebuild(const value_type& tag, size_type index) const 
00103         {
00104             value_type adr(tag);
00105             adr.address = ((tag.address << m_idx_bit) | index) << m_off_bit;
00106             return adr;
00107         }
00108 
00109         bool match(const value_type& lhs, const value_type& rhs) const 
00110         {
00111             return lhs == rhs;
00112         }
00113 
00114     };
00115 
00116 } // namespace Onikiri
00117 
00118 #endif // __ADR_HASHER_H

Onikiri2に対してTue Jun 18 14:34:23 2013に生成されました。  doxygen 1.4.7