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
| 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
|
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 regScoreBoard.resize(numPhysicalRegs + (numMiscRegs * activeThreads));
55
56 //Initialize values
57 for (int i=0; i < numLogicalIntRegs * activeThreads; i++) {
58 regScoreBoard[i] = 1;
59 }
60
61 for (int i= numPhysicalIntRegs;
62 i < numPhysicalIntRegs + (numLogicalFloatRegs * activeThreads);
63 i++) {
64 regScoreBoard[i] = 1;
65 }
66
67 for (int i = numPhysicalRegs;
68 i < numPhysicalRegs + (numMiscRegs * activeThreads);
69 i++) {
70 regScoreBoard[i] = 1;
71 }
72}
73
74std::string
75Scoreboard::name() const
76{
77 return "cpu.scoreboard";
78}
79
80bool
81Scoreboard::getReg(PhysRegIndex phys_reg)
82{
83#if THE_ISA == ALPHA_ISA
84 // Always ready if int or fp zero reg.
85 if (phys_reg == zeroRegIdx ||
86 phys_reg == (zeroRegIdx + numPhysicalIntRegs)) {
87 return 1;
88 }
89#else
90 // Always ready if int zero reg.
91 if (phys_reg == zeroRegIdx) {
92 return 1;
93 }
94#endif
95
96 return regScoreBoard[phys_reg];
97}
98
99void
100Scoreboard::setReg(PhysRegIndex phys_reg)
101{
102 DPRINTF(Scoreboard, "Setting reg %i as ready\n", phys_reg);
103
104 regScoreBoard[phys_reg] = 1;
105}
106
107void
108Scoreboard::unsetReg(PhysRegIndex ready_reg)
109{
110#if THE_ISA == ALPHA_ISA
111 if (ready_reg == zeroRegIdx ||
112 ready_reg == (zeroRegIdx + numPhysicalIntRegs)) {
113 // Don't do anything if int or fp zero reg.
114 return;
115 }
116#else
117 if (ready_reg == zeroRegIdx) {
118 // Don't do anything if int zero reg.
119 return;
120 }
121#endif
122
123 regScoreBoard[ready_reg] = 0;
124}
| 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 regScoreBoard.resize(numPhysicalRegs + (numMiscRegs * activeThreads));
55
56 //Initialize values
57 for (int i=0; i < numLogicalIntRegs * activeThreads; i++) {
58 regScoreBoard[i] = 1;
59 }
60
61 for (int i= numPhysicalIntRegs;
62 i < numPhysicalIntRegs + (numLogicalFloatRegs * activeThreads);
63 i++) {
64 regScoreBoard[i] = 1;
65 }
66
67 for (int i = numPhysicalRegs;
68 i < numPhysicalRegs + (numMiscRegs * activeThreads);
69 i++) {
70 regScoreBoard[i] = 1;
71 }
72}
73
74std::string
75Scoreboard::name() const
76{
77 return "cpu.scoreboard";
78}
79
80bool
81Scoreboard::getReg(PhysRegIndex phys_reg)
82{
83#if THE_ISA == ALPHA_ISA
84 // Always ready if int or fp zero reg.
85 if (phys_reg == zeroRegIdx ||
86 phys_reg == (zeroRegIdx + numPhysicalIntRegs)) {
87 return 1;
88 }
89#else
90 // Always ready if int zero reg.
91 if (phys_reg == zeroRegIdx) {
92 return 1;
93 }
94#endif
95
96 return regScoreBoard[phys_reg];
97}
98
99void
100Scoreboard::setReg(PhysRegIndex phys_reg)
101{
102 DPRINTF(Scoreboard, "Setting reg %i as ready\n", phys_reg);
103
104 regScoreBoard[phys_reg] = 1;
105}
106
107void
108Scoreboard::unsetReg(PhysRegIndex ready_reg)
109{
110#if THE_ISA == ALPHA_ISA
111 if (ready_reg == zeroRegIdx ||
112 ready_reg == (zeroRegIdx + numPhysicalIntRegs)) {
113 // Don't do anything if int or fp zero reg.
114 return;
115 }
116#else
117 if (ready_reg == zeroRegIdx) {
118 // Don't do anything if int zero reg.
119 return;
120 }
121#endif
122
123 regScoreBoard[ready_reg] = 0;
124}
|