1/*
2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
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;

--- 10 unchanged lines hidden (view full) ---

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: Kevin Lim
29 */
30
31// Todo: Create destructor.
32// Have it so that there's a more meaningful name given to the variable
33// that marks the beginning of the FP registers.
34
35#ifndef __CPU_O3_CPU_RENAME_MAP_HH__
36#define __CPU_O3_CPU_RENAME_MAP_HH__
37
38#include <iostream>
39#include <utility>
40#include <vector>
41
42#include "cpu/o3/free_list.hh"
43//For RegIndex
44#include "arch/isa_traits.hh"

--- 15 unchanged lines hidden (view full) ---

60 * return the physical register that a logical register has been
61 * renamed to, and the previous physical register that the same
62 * logical register was previously mapped to.
63 */
64 typedef std::pair<PhysRegIndex, PhysRegIndex> RenameInfo;
65
66 public:
67 //Constructor
68 SimpleRenameMap(unsigned _numLogicalIntRegs,
69 unsigned _numPhysicalIntRegs,
70 unsigned _numLogicalFloatRegs,
71 unsigned _numPhysicalFloatRegs,
72 unsigned _numMiscRegs,
73 RegIndex _intZeroReg,
74 RegIndex _floatZeroReg);
75
76 /** Destructor. */
77 ~SimpleRenameMap();
78
79 void setFreeList(SimpleFreeList *fl_ptr);
80
81 //Tell rename map to get a free physical register for a given
82 //architected register. Not sure it should have a return value,
83 //but perhaps it should have some sort of fault in case there are
84 //no free registers.
85 RenameInfo rename(RegIndex arch_reg);
86
87 PhysRegIndex lookup(RegIndex phys_reg);
88
89 bool isReady(PhysRegIndex arch_reg);
90
91 /**
92 * Marks the given register as ready, meaning that its value has been
93 * calculated and written to the register file.
94 * @param ready_reg The index of the physical register that is now ready.
95 */
96 void markAsReady(PhysRegIndex ready_reg);
97
98 void setEntry(RegIndex arch_reg, PhysRegIndex renamed_reg);
99
100 void squash(std::vector<RegIndex> freed_regs,
101 std::vector<UnmapInfo> unmaps);
102
103 int numFreeEntries();
104
105 private:
106 /** Number of logical integer registers. */
107 int numLogicalIntRegs;
108
109 /** Number of physical integer registers. */
110 int numPhysicalIntRegs;
111
112 /** Number of logical floating point registers. */
113 int numLogicalFloatRegs;

--- 26 unchanged lines hidden (view full) ---

140 PhysRegIndex physical_reg;
141 bool valid;
142
143 RenameEntry()
144 : physical_reg(0), valid(false)
145 { }
146 };
147
148 /** Integer rename map. */
149 RenameEntry *intRenameMap;
150
151 /** Floating point rename map. */
152 RenameEntry *floatRenameMap;
153
154 /** Free list interface. */
155 SimpleFreeList *freeList;
156
157 // Might want to make all these scoreboards into one large scoreboard.
158
159 /** Scoreboard of physical integer registers, saying whether or not they
160 * are ready.
161 */
162 std::vector<bool> intScoreboard;
163
164 /** Scoreboard of physical floating registers, saying whether or not they
165 * are ready.
166 */
167 std::vector<bool> floatScoreboard;
168
169 /** Scoreboard of miscellaneous registers, saying whether or not they
170 * are ready.
171 */
172 std::vector<bool> miscScoreboard;
173};
174
175#endif //__CPU_O3_CPU_RENAME_MAP_HH__