mem_dep_unit.hh (10333:6be8945d226b) mem_dep_unit.hh (10473:4cbe53150053)
1/*
2 * Copyright (c) 2012, 2014 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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39 *
40 * Authors: Kevin Lim
41 */
42
43#ifndef __CPU_O3_MEM_DEP_UNIT_HH__
44#define __CPU_O3_MEM_DEP_UNIT_HH__
45
46#include <list>
1/*
2 * Copyright (c) 2012, 2014 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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39 *
40 * Authors: Kevin Lim
41 */
42
43#ifndef __CPU_O3_MEM_DEP_UNIT_HH__
44#define __CPU_O3_MEM_DEP_UNIT_HH__
45
46#include <list>
47#include <memory>
47#include <set>
48
49#include "base/hashmap.hh"
48#include <set>
49
50#include "base/hashmap.hh"
50#include "base/refcnt.hh"
51#include "base/statistics.hh"
52#include "cpu/inst_seq.hh"
53#include "debug/MemDepUnit.hh"
54
55struct SNHash {
56 size_t operator() (const InstSeqNum &seq_num) const {
57 unsigned a = (unsigned)seq_num;
58 unsigned hash = (((a >> 14) ^ ((a >> 2) & 0xffff))) & 0x7FFFFFFF;

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159 /** Debugging function to dump the lists of instructions. */
160 void dumpLists();
161
162 private:
163 typedef typename std::list<DynInstPtr>::iterator ListIt;
164
165 class MemDepEntry;
166
51#include "base/statistics.hh"
52#include "cpu/inst_seq.hh"
53#include "debug/MemDepUnit.hh"
54
55struct SNHash {
56 size_t operator() (const InstSeqNum &seq_num) const {
57 unsigned a = (unsigned)seq_num;
58 unsigned hash = (((a >> 14) ^ ((a >> 2) & 0xffff))) & 0x7FFFFFFF;

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159 /** Debugging function to dump the lists of instructions. */
160 void dumpLists();
161
162 private:
163 typedef typename std::list<DynInstPtr>::iterator ListIt;
164
165 class MemDepEntry;
166
167 typedef RefCountingPtr<MemDepEntry> MemDepEntryPtr;
167 typedef std::shared_ptr<MemDepEntry> MemDepEntryPtr;
168
169 /** Memory dependence entries that track memory operations, marking
170 * when the instruction is ready to execute and what instructions depend
171 * upon it.
172 */
168
169 /** Memory dependence entries that track memory operations, marking
170 * when the instruction is ready to execute and what instructions depend
171 * upon it.
172 */
173 class MemDepEntry : public RefCounted {
173 class MemDepEntry {
174 public:
175 /** Constructs a memory dependence entry. */
176 MemDepEntry(DynInstPtr &new_inst)
177 : inst(new_inst), regsReady(false), memDepReady(false),
178 completed(false), squashed(false)
179 {
180#ifdef DEBUG
181 ++memdep_count;

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175 /** Constructs a memory dependence entry. */
176 MemDepEntry(DynInstPtr &new_inst)
177 : inst(new_inst), regsReady(false), memDepReady(false),
178 completed(false), squashed(false)
179 {
180#ifdef DEBUG
181 ++memdep_count;

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