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Diffstat (limited to 'src/arch/arm/predecoder.hh')
| -rw-r--r-- | src/arch/arm/predecoder.hh | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/src/arch/arm/predecoder.hh b/src/arch/arm/predecoder.hh deleted file mode 100644 index 87ba1777c..000000000 --- a/src/arch/arm/predecoder.hh +++ /dev/null @@ -1,154 +0,0 @@ -/* - * Copyright (c) 2010 ARM Limited - * All rights reserved - * - * The license below extends only to copyright in the software and shall - * not be construed as granting a license to any other intellectual - * property including but not limited to intellectual property relating - * to a hardware implementation of the functionality of the software - * licensed hereunder. You may use the software subject to the license - * terms below provided that you ensure that this notice is replicated - * unmodified and in its entirety in all distributions of the software, - * modified or unmodified, in source code or in binary form. - * - * Copyright (c) 2006 The Regents of The University of Michigan - * Copyright (c) 2007-2008 The Florida State University - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer; - * redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution; - * neither the name of the copyright holders nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * Authors: Gabe Black - * Stephen Hines - */ - -#ifndef __ARCH_ARM_PREDECODER_HH__ -#define __ARCH_ARM_PREDECODER_HH__ - -#include <cassert> - -#include "arch/arm/miscregs.hh" -#include "arch/arm/types.hh" -#include "base/types.hh" - -class ThreadContext; - -namespace ArmISA -{ - class Predecoder - { - protected: - ThreadContext * tc; - //The extended machine instruction being generated - ExtMachInst emi; - MachInst data; - bool bigThumb; - bool emiReady; - bool outOfBytes; - int offset; - bool foundIt; - ITSTATE itBits; - - public: - void reset() - { - bigThumb = false; - offset = 0; - emi = 0; - emiReady = false; - outOfBytes = true; - foundIt = false; - } - - Predecoder(ThreadContext * _tc) : - tc(_tc), data(0) - { - reset(); - } - - ThreadContext * getTC() - { - return tc; - } - - void - setTC(ThreadContext * _tc) - { - tc = _tc; - } - - void process(); - - //Use this to give data to the predecoder. This should be used - //when there is control flow. - void moreBytes(const PCState &pc, Addr fetchPC, MachInst inst); - - //Use this to give data to the predecoder. This should be used - //when instructions are executed in order. - void moreBytes(MachInst machInst) - { - moreBytes(0, 0, machInst); - } - - inline void consumeBytes(int numBytes) - { - offset += numBytes; - assert(offset <= sizeof(MachInst)); - if (offset == sizeof(MachInst)) - outOfBytes = true; - } - - bool needMoreBytes() const - { - return outOfBytes; - } - - bool extMachInstReady() const - { - return emiReady; - } - - int getInstSize() const - { - return (!emi.thumb || emi.bigThumb) ? 4 : 2; - } - - //This returns a constant reference to the ExtMachInst to avoid a copy - ExtMachInst getExtMachInst(PCState &pc) - { - assert(emiReady); - ExtMachInst thisEmi = emi; - pc.npc(pc.pc() + getInstSize()); - if (foundIt) - pc.nextItstate(itBits); - thisEmi.itstate = pc.itstate(); - pc.size(getInstSize()); - emi = 0; - emiReady = false; - foundIt = false; - return thisEmi; - } - }; -} - -#endif // __ARCH_ARM_PREDECODER_HH__ |