decode_cache.cc revision 9024:5851586f399c
1/* 2 * Copyright (c) 2011-2012 Google 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Gabe Black 29 */ 30 31#include "arch/generic/decode_cache.hh" 32#include "arch/decoder.hh" 33#include "arch/types.hh" 34#include "config/the_isa.hh" 35#include "cpu/static_inst.hh" 36 37namespace GenericISA 38{ 39 40StaticInstPtr 41BasicDecodeCache::decode(TheISA::Decoder *decoder, 42 TheISA::ExtMachInst mach_inst, Addr addr) 43{ 44 StaticInstPtr &si = decodePages.lookup(addr); 45 if (si && (si->machInst == mach_inst)) 46 return si; 47 48 DecodeCache::InstMap::iterator iter = instMap.find(mach_inst); 49 if (iter != instMap.end()) { 50 si = iter->second; 51 return si; 52 } 53 54 si = decoder->decodeInst(mach_inst); 55 instMap[mach_inst] = si; 56 return si; 57} 58 59} // namespace GenericISA 60