1/*
2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
3 * Copyright (c) 2013 Advanced Micro Devices, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Kevin Lim
30 * Gabe Black
31 * Steve Reinhardt
32 */
33
34#include "cpu/o3/regfile.hh"
35
36#include "cpu/o3/free_list.hh"
37
38PhysRegFile::PhysRegFile(unsigned _numPhysicalIntRegs,
39 unsigned _numPhysicalFloatRegs,
40 unsigned _numPhysicalCCRegs)
41 : intRegFile(_numPhysicalIntRegs),
42 floatRegFile(_numPhysicalFloatRegs),
43 ccRegFile(_numPhysicalCCRegs),
| 1/*
2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
3 * Copyright (c) 2013 Advanced Micro Devices, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Kevin Lim
30 * Gabe Black
31 * Steve Reinhardt
32 */
33
34#include "cpu/o3/regfile.hh"
35
36#include "cpu/o3/free_list.hh"
37
38PhysRegFile::PhysRegFile(unsigned _numPhysicalIntRegs,
39 unsigned _numPhysicalFloatRegs,
40 unsigned _numPhysicalCCRegs)
41 : intRegFile(_numPhysicalIntRegs),
42 floatRegFile(_numPhysicalFloatRegs),
43 ccRegFile(_numPhysicalCCRegs),
|
44 baseFloatRegIndex(_numPhysicalIntRegs),
45 baseCCRegIndex(_numPhysicalIntRegs + _numPhysicalFloatRegs),
| 44 numPhysicalIntRegs(_numPhysicalIntRegs),
45 numPhysicalFloatRegs(_numPhysicalFloatRegs),
46 numPhysicalCCRegs(_numPhysicalCCRegs),
|
46 totalNumRegs(_numPhysicalIntRegs
47 + _numPhysicalFloatRegs
48 + _numPhysicalCCRegs)
49{
| 47 totalNumRegs(_numPhysicalIntRegs
48 + _numPhysicalFloatRegs
49 + _numPhysicalCCRegs)
50{
|
| 51 PhysRegIndex phys_reg;
52 PhysRegIndex flat_reg_idx = 0;
53
|
50 if (TheISA::NumCCRegs == 0 && _numPhysicalCCRegs != 0) {
51 // Just make this a warning and go ahead and allocate them
52 // anyway, to keep from having to add checks everywhere
53 warn("Non-zero number of physical CC regs specified, even though\n"
54 " ISA does not use them.\n");
55 }
| 54 if (TheISA::NumCCRegs == 0 && _numPhysicalCCRegs != 0) {
55 // Just make this a warning and go ahead and allocate them
56 // anyway, to keep from having to add checks everywhere
57 warn("Non-zero number of physical CC regs specified, even though\n"
58 " ISA does not use them.\n");
59 }
|
| 60 // The initial batch of registers are the integer ones
61 for (phys_reg = 0; phys_reg < numPhysicalIntRegs; phys_reg++) {
62 intRegIds.emplace_back(IntRegClass, phys_reg, flat_reg_idx++);
63 }
64
65 // The next batch of the registers are the floating-point physical
66 // registers; put them onto the floating-point free list.
67 for (phys_reg = 0; phys_reg < numPhysicalFloatRegs; phys_reg++) {
68 floatRegIds.emplace_back(FloatRegClass, phys_reg, flat_reg_idx++);
69 }
70
71 // The rest of the registers are the condition-code physical
72 // registers; put them onto the condition-code free list.
73 for (phys_reg = 0; phys_reg < numPhysicalCCRegs; phys_reg++) {
74 ccRegIds.emplace_back(CCRegClass, phys_reg, flat_reg_idx++);
75 }
76
77 // Misc regs have a fixed mapping but still need PhysRegIds.
78 for (phys_reg = 0; phys_reg < TheISA::NumMiscRegs; phys_reg++) {
79 miscRegIds.emplace_back(MiscRegClass, phys_reg, 0);
80 }
|
56}
57
58
59void
60PhysRegFile::initFreeList(UnifiedFreeList *freeList)
61{
62 // Initialize the free lists.
| 81}
82
83
84void
85PhysRegFile::initFreeList(UnifiedFreeList *freeList)
86{
87 // Initialize the free lists.
|
63 PhysRegIndex reg_idx = 0;
| 88 int reg_idx = 0;
|
64
65 // The initial batch of registers are the integer ones
| 89
90 // The initial batch of registers are the integer ones
|
66 while (reg_idx < baseFloatRegIndex) {
67 freeList->addIntReg(reg_idx++);
| 91 for (reg_idx = 0; reg_idx < numPhysicalIntRegs; reg_idx++) {
92 assert(intRegIds[reg_idx].regIdx == reg_idx);
93 freeList->addIntReg(&intRegIds[reg_idx]);
|
68 }
69
70 // The next batch of the registers are the floating-point physical
71 // registers; put them onto the floating-point free list.
| 94 }
95
96 // The next batch of the registers are the floating-point physical
97 // registers; put them onto the floating-point free list.
|
72 while (reg_idx < baseCCRegIndex) {
73 freeList->addFloatReg(reg_idx++);
| 98 for (reg_idx = 0; reg_idx < numPhysicalFloatRegs; reg_idx++) {
99 assert(floatRegIds[reg_idx].regIdx == reg_idx);
100 freeList->addFloatReg(&floatRegIds[reg_idx]);
|
74 }
75
76 // The rest of the registers are the condition-code physical
77 // registers; put them onto the condition-code free list.
| 101 }
102
103 // The rest of the registers are the condition-code physical
104 // registers; put them onto the condition-code free list.
|
78 while (reg_idx < totalNumRegs) {
79 freeList->addCCReg(reg_idx++);
| 105 for (reg_idx = 0; reg_idx < numPhysicalCCRegs; reg_idx++) {
106 assert(ccRegIds[reg_idx].regIdx == reg_idx);
107 freeList->addCCReg(&ccRegIds[reg_idx]);
|
80 }
81}
| 108 }
109}
|