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Diffstat (limited to 'cpu/o3/free_list.hh')
| -rw-r--r-- | cpu/o3/free_list.hh | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/cpu/o3/free_list.hh b/cpu/o3/free_list.hh deleted file mode 100644 index 0b85dba1e..000000000 --- a/cpu/o3/free_list.hh +++ /dev/null @@ -1,195 +0,0 @@ -/* - * Copyright (c) 2004-2005 The Regents of The University of Michigan - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer; - * redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution; - * neither the name of the copyright holders nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#ifndef __CPU_O3_CPU_FREE_LIST_HH__ -#define __CPU_O3_CPU_FREE_LIST_HH__ - -#include <iostream> -#include <queue> - -#include "arch/isa_traits.hh" -#include "base/trace.hh" -#include "base/traceflags.hh" -#include "cpu/o3/comm.hh" - -/** - * FreeList class that simply holds the list of free integer and floating - * point registers. Can request for a free register of either type, and - * also send back free registers of either type. This is a very simple - * class, but it should be sufficient for most implementations. Like all - * other classes, it assumes that the indices for the floating point - * registers starts after the integer registers end. Hence the variable - * numPhysicalIntRegs is logically equivalent to the baseFP dependency. - * Note that - * while this most likely should be called FreeList, the name "FreeList" - * is used in a typedef within the CPU Policy, and therefore no class - * can be named simply "FreeList". - * @todo: Give a better name to the base FP dependency. - */ -class SimpleFreeList -{ - private: - /** The list of free integer registers. */ - std::queue<PhysRegIndex> freeIntRegs; - - /** The list of free floating point registers. */ - std::queue<PhysRegIndex> freeFloatRegs; - - /** Number of logical integer registers. */ - int numLogicalIntRegs; - - /** Number of physical integer registers. */ - int numPhysicalIntRegs; - - /** Number of logical floating point registers. */ - int numLogicalFloatRegs; - - /** Number of physical floating point registers. */ - int numPhysicalFloatRegs; - - /** Total number of physical registers. */ - int numPhysicalRegs; - - /** DEBUG stuff below. */ - std::vector<int> freeIntRegsScoreboard; - - std::vector<bool> freeFloatRegsScoreboard; - - public: - SimpleFreeList(unsigned _numLogicalIntRegs, - unsigned _numPhysicalIntRegs, - unsigned _numLogicalFloatRegs, - unsigned _numPhysicalFloatRegs); - - inline PhysRegIndex getIntReg(); - - inline PhysRegIndex getFloatReg(); - - inline void addReg(PhysRegIndex freed_reg); - - inline void addIntReg(PhysRegIndex freed_reg); - - inline void addFloatReg(PhysRegIndex freed_reg); - - bool hasFreeIntRegs() - { return !freeIntRegs.empty(); } - - bool hasFreeFloatRegs() - { return !freeFloatRegs.empty(); } - - int numFreeIntRegs() - { return freeIntRegs.size(); } - - int numFreeFloatRegs() - { return freeFloatRegs.size(); } -}; - -inline PhysRegIndex -SimpleFreeList::getIntReg() -{ - DPRINTF(Rename, "FreeList: Trying to get free integer register.\n"); - if (freeIntRegs.empty()) { - panic("No free integer registers!"); - } - - PhysRegIndex free_reg = freeIntRegs.front(); - - freeIntRegs.pop(); - - // DEBUG - assert(freeIntRegsScoreboard[free_reg]); - freeIntRegsScoreboard[free_reg] = 0; - - return(free_reg); -} - -inline PhysRegIndex -SimpleFreeList::getFloatReg() -{ - DPRINTF(Rename, "FreeList: Trying to get free float register.\n"); - if (freeFloatRegs.empty()) { - panic("No free integer registers!"); - } - - PhysRegIndex free_reg = freeFloatRegs.front(); - - freeFloatRegs.pop(); - - // DEBUG - assert(freeFloatRegsScoreboard[free_reg]); - freeFloatRegsScoreboard[free_reg] = 0; - - return(free_reg); -} - -inline void -SimpleFreeList::addReg(PhysRegIndex freed_reg) -{ - DPRINTF(Rename, "Freelist: Freeing register %i.\n", freed_reg); - //Might want to add in a check for whether or not this register is - //already in there. A bit vector or something similar would be useful. - if (freed_reg < numPhysicalIntRegs) { - freeIntRegs.push(freed_reg); - - // DEBUG - assert(freeIntRegsScoreboard[freed_reg] == false); - freeIntRegsScoreboard[freed_reg] = 1; - } else if (freed_reg < numPhysicalRegs) { - freeFloatRegs.push(freed_reg); - - // DEBUG - assert(freeFloatRegsScoreboard[freed_reg] == false); - freeFloatRegsScoreboard[freed_reg] = 1; - } -} - -inline void -SimpleFreeList::addIntReg(PhysRegIndex freed_reg) -{ - DPRINTF(Rename, "Freelist: Freeing int register %i.\n", freed_reg); - - // DEBUG - assert(!freeIntRegsScoreboard[freed_reg]); - freeIntRegsScoreboard[freed_reg] = 1; - - freeIntRegs.push(freed_reg); -} - -inline void -SimpleFreeList::addFloatReg(PhysRegIndex freed_reg) -{ - DPRINTF(Rename, "Freelist: Freeing float register %i.\n", freed_reg); - - // DEBUG - assert(!freeFloatRegsScoreboard[freed_reg]); - freeFloatRegsScoreboard[freed_reg] = 1; - - freeFloatRegs.push(freed_reg); -} - -#endif // __CPU_O3_CPU_FREE_LIST_HH__ |