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;

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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";

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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}