1/* 2 * Copyright (c) 2004-2005 The Regents of The University of Michigan
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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 */ 31 32#include "base/trace.hh" 33#include "cpu/o3/free_list.hh" 34#include "debug/FreeList.hh" 35
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35SimpleFreeList::SimpleFreeList(ThreadID activeThreads,
36 unsigned _numLogicalIntRegs,
37 unsigned _numPhysicalIntRegs,
38 unsigned _numLogicalFloatRegs,
39 unsigned _numPhysicalFloatRegs)
40 : numLogicalIntRegs(_numLogicalIntRegs),
41 numPhysicalIntRegs(_numPhysicalIntRegs),
42 numLogicalFloatRegs(_numLogicalFloatRegs),
43 numPhysicalFloatRegs(_numPhysicalFloatRegs),
44 numPhysicalRegs(numPhysicalIntRegs + numPhysicalFloatRegs)
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36UnifiedFreeList::UnifiedFreeList(const std::string &_my_name, 37 PhysRegFile *_regFile) 38 : _name(_my_name), regFile(_regFile) |
39{ 40 DPRINTF(FreeList, "Creating new free list object.\n"); 41
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48 // Put all of the extra physical registers onto the free list. This
49 // means excluding all of the base logical registers.
50 for (PhysRegIndex i = numLogicalIntRegs * activeThreads;
51 i < numPhysicalIntRegs; ++i)
52 {
53 freeIntRegs.push(i);
54 }
55
56 // Put all of the extra physical registers onto the free list. This
57 // means excluding all of the base logical registers. Because the
58 // float registers' indices start where the physical registers end,
59 // some math must be done to determine where the free registers start.
60 PhysRegIndex i = numPhysicalIntRegs + (numLogicalFloatRegs * activeThreads);
61
62 for ( ; i < numPhysicalRegs; ++i)
63 {
64 freeFloatRegs.push(i);
65 }
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42 // Have the register file initialize the free list since it knows 43 // about its internal organization 44 regFile->initFreeList(this); |
45}
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67
68std::string
69SimpleFreeList::name() const
70{
71 return "cpu.freelist";
72}
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