eb7acc7c65
While the arch/generic directory is in arch/, it still shouldn't assume any particular ISA. This change templatizes away the ISA specific types so it can be used in multiple ISAs at a time. Change-Id: I1abb4f5081a0a25f743be786ad8e7e3d55cfc67a Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/40097 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com> Tested-by: kokoro <noreply+kokoro@google.com>
79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
/*
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* Copyright (c) 2011 Google
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __ARCH_GENERIC_DECODE_CACHE_HH__
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#define __ARCH_GENERIC_DECODE_CACHE_HH__
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#include "base/types.hh"
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#include "cpu/decode_cache.hh"
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#include "cpu/static_inst_fwd.hh"
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namespace GenericISA
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{
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template <typename Decoder, typename EMI>
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class BasicDecodeCache
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{
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private:
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DecodeCache::InstMap<EMI> instMap;
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struct AddrMapEntry
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{
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StaticInstPtr inst;
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EMI machInst;
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};
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DecodeCache::AddrMap<AddrMapEntry> decodePages;
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public:
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/// Decode a machine instruction.
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/// @param mach_inst The binary instruction to decode.
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/// @retval A pointer to the corresponding StaticInst object.
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StaticInstPtr
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decode(Decoder *const decoder, EMI mach_inst, Addr addr)
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{
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auto &entry = decodePages.lookup(addr);
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if (entry.inst && (entry.machInst == mach_inst))
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return entry.inst;
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entry.machInst = mach_inst;
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auto iter = instMap.find(mach_inst);
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if (iter != instMap.end()) {
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entry.inst = iter->second;
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return entry.inst;
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}
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entry.inst = decoder->decodeInst(mach_inst);
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instMap[mach_inst] = entry.inst;
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return entry.inst;
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}
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};
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} // namespace GenericISA
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#endif // __ARCH_GENERIC_DECODE_CACHE_HH__
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