1/*
2 * Copyright (c) 2005-2006 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;
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: Korey Sewell
29 * Kevin Lim
30 */
31
32#include "config/the_isa.hh"
33#include "cpu/o3/scoreboard.hh"
| 1/*
2 * Copyright (c) 2005-2006 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;
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: Korey Sewell
29 * Kevin Lim
30 */
31
32#include "config/the_isa.hh"
33#include "cpu/o3/scoreboard.hh"
|
34
35Scoreboard::Scoreboard(unsigned activeThreads,
36 unsigned _numLogicalIntRegs,
37 unsigned _numPhysicalIntRegs,
38 unsigned _numLogicalFloatRegs,
39 unsigned _numPhysicalFloatRegs,
40 unsigned _numMiscRegs,
41 unsigned _zeroRegIdx)
42 : numLogicalIntRegs(_numLogicalIntRegs),
43 numPhysicalIntRegs(_numPhysicalIntRegs),
44 numLogicalFloatRegs(_numLogicalFloatRegs),
45 numPhysicalFloatRegs(_numPhysicalFloatRegs),
46 numMiscRegs(_numMiscRegs),
47 zeroRegIdx(_zeroRegIdx)
48{
49 //Get Register Sizes
50 numLogicalRegs = numLogicalIntRegs + numLogicalFloatRegs;
51 numPhysicalRegs = numPhysicalIntRegs + numPhysicalFloatRegs;
52
53 //Resize scoreboard appropriately
54 resize(numPhysicalRegs + (numMiscRegs * activeThreads));
55
56 //Initialize values
57 for (int i=0; i < numLogicalIntRegs * activeThreads; i++) {
58 assert(indexInBounds(i));
59 regScoreBoard[i] = 1;
60 }
61
62 for (int i= numPhysicalIntRegs;
63 i < numPhysicalIntRegs + (numLogicalFloatRegs * activeThreads);
64 i++) {
65 assert(indexInBounds(i));
66 regScoreBoard[i] = 1;
67 }
68
69 for (int i = numPhysicalRegs;
70 i < numPhysicalRegs + (numMiscRegs * activeThreads);
71 i++) {
72 assert(indexInBounds(i));
73 regScoreBoard[i] = 1;
74 }
75}
76
77std::string
78Scoreboard::name() const
79{
80 return "cpu.scoreboard";
81}
82
83bool
84Scoreboard::getReg(PhysRegIndex phys_reg)
85{
86#if THE_ISA == ALPHA_ISA
87 // Always ready if int or fp zero reg.
88 if (phys_reg == zeroRegIdx ||
89 phys_reg == (zeroRegIdx + numPhysicalIntRegs)) {
90 return 1;
91 }
92#else
93 // Always ready if int zero reg.
94 if (phys_reg == zeroRegIdx) {
95 return 1;
96 }
97#endif
98
99 assert(indexInBounds(phys_reg));
100 return regScoreBoard[phys_reg];
101}
102
103void
104Scoreboard::setReg(PhysRegIndex phys_reg)
105{
106 DPRINTF(Scoreboard, "Setting reg %i as ready\n", phys_reg);
107
108 assert(indexInBounds(phys_reg));
109 regScoreBoard[phys_reg] = 1;
110}
111
112void
113Scoreboard::unsetReg(PhysRegIndex ready_reg)
114{
115#if THE_ISA == ALPHA_ISA
116 if (ready_reg == zeroRegIdx ||
117 ready_reg == (zeroRegIdx + numPhysicalIntRegs)) {
118 // Don't do anything if int or fp zero reg.
119 return;
120 }
121#else
122 if (ready_reg == zeroRegIdx) {
123 // Don't do anything if int zero reg.
124 return;
125 }
126#endif
127
128 assert(indexInBounds(ready_reg));
129 regScoreBoard[ready_reg] = 0;
130}
| 35
36Scoreboard::Scoreboard(unsigned activeThreads,
37 unsigned _numLogicalIntRegs,
38 unsigned _numPhysicalIntRegs,
39 unsigned _numLogicalFloatRegs,
40 unsigned _numPhysicalFloatRegs,
41 unsigned _numMiscRegs,
42 unsigned _zeroRegIdx)
43 : numLogicalIntRegs(_numLogicalIntRegs),
44 numPhysicalIntRegs(_numPhysicalIntRegs),
45 numLogicalFloatRegs(_numLogicalFloatRegs),
46 numPhysicalFloatRegs(_numPhysicalFloatRegs),
47 numMiscRegs(_numMiscRegs),
48 zeroRegIdx(_zeroRegIdx)
49{
50 //Get Register Sizes
51 numLogicalRegs = numLogicalIntRegs + numLogicalFloatRegs;
52 numPhysicalRegs = numPhysicalIntRegs + numPhysicalFloatRegs;
53
54 //Resize scoreboard appropriately
55 resize(numPhysicalRegs + (numMiscRegs * activeThreads));
56
57 //Initialize values
58 for (int i=0; i < numLogicalIntRegs * activeThreads; i++) {
59 assert(indexInBounds(i));
60 regScoreBoard[i] = 1;
61 }
62
63 for (int i= numPhysicalIntRegs;
64 i < numPhysicalIntRegs + (numLogicalFloatRegs * activeThreads);
65 i++) {
66 assert(indexInBounds(i));
67 regScoreBoard[i] = 1;
68 }
69
70 for (int i = numPhysicalRegs;
71 i < numPhysicalRegs + (numMiscRegs * activeThreads);
72 i++) {
73 assert(indexInBounds(i));
74 regScoreBoard[i] = 1;
75 }
76}
77
78std::string
79Scoreboard::name() const
80{
81 return "cpu.scoreboard";
82}
83
84bool
85Scoreboard::getReg(PhysRegIndex phys_reg)
86{
87#if THE_ISA == ALPHA_ISA
88 // Always ready if int or fp zero reg.
89 if (phys_reg == zeroRegIdx ||
90 phys_reg == (zeroRegIdx + numPhysicalIntRegs)) {
91 return 1;
92 }
93#else
94 // Always ready if int zero reg.
95 if (phys_reg == zeroRegIdx) {
96 return 1;
97 }
98#endif
99
100 assert(indexInBounds(phys_reg));
101 return regScoreBoard[phys_reg];
102}
103
104void
105Scoreboard::setReg(PhysRegIndex phys_reg)
106{
107 DPRINTF(Scoreboard, "Setting reg %i as ready\n", phys_reg);
108
109 assert(indexInBounds(phys_reg));
110 regScoreBoard[phys_reg] = 1;
111}
112
113void
114Scoreboard::unsetReg(PhysRegIndex ready_reg)
115{
116#if THE_ISA == ALPHA_ISA
117 if (ready_reg == zeroRegIdx ||
118 ready_reg == (zeroRegIdx + numPhysicalIntRegs)) {
119 // Don't do anything if int or fp zero reg.
120 return;
121 }
122#else
123 if (ready_reg == zeroRegIdx) {
124 // Don't do anything if int zero reg.
125 return;
126 }
127#endif
128
129 assert(indexInBounds(ready_reg));
130 regScoreBoard[ready_reg] = 0;
131}
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