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Diffstat (limited to 'cpu/o3/free_list.hh')
-rw-r--r-- | cpu/o3/free_list.hh | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/cpu/o3/free_list.hh b/cpu/o3/free_list.hh deleted file mode 100644 index 29e84cd44..000000000 --- a/cpu/o3/free_list.hh +++ /dev/null @@ -1,189 +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_FREE_LIST_HH__ -#define __CPU_O3_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; - - public: - /** Constructs a free list. - * @param activeThreads Number of active threads. - * @param _numLogicalIntRegs Number of logical integer registers. - * @param _numPhysicalIntRegs Number of physical integer registers. - * @param _numLogicalFloatRegs Number of logical fp registers. - * @param _numPhysicalFloatRegs Number of physical fp registers. - */ - SimpleFreeList(unsigned activeThreads, - unsigned _numLogicalIntRegs, - unsigned _numPhysicalIntRegs, - unsigned _numLogicalFloatRegs, - unsigned _numPhysicalFloatRegs); - - /** Gives the name of the freelist. */ - std::string name() const; - - /** Gets a free integer register. */ - inline PhysRegIndex getIntReg(); - - /** Gets a free fp register. */ - inline PhysRegIndex getFloatReg(); - - /** Adds a register back to the free list. */ - inline void addReg(PhysRegIndex freed_reg); - - /** Adds an integer register back to the free list. */ - inline void addIntReg(PhysRegIndex freed_reg); - - /** Adds a fp register back to the free list. */ - inline void addFloatReg(PhysRegIndex freed_reg); - - /** Checks if there are any free integer registers. */ - bool hasFreeIntRegs() - { return !freeIntRegs.empty(); } - - /** Checks if there are any free fp registers. */ - bool hasFreeFloatRegs() - { return !freeFloatRegs.empty(); } - - /** Returns the number of free integer registers. */ - int numFreeIntRegs() - { return freeIntRegs.size(); } - - /** Returns the number of free fp registers. */ - int numFreeFloatRegs() - { return freeFloatRegs.size(); } -}; - -inline PhysRegIndex -SimpleFreeList::getIntReg() -{ - DPRINTF(FreeList, "Trying to get free integer register.\n"); - - if (freeIntRegs.empty()) { - panic("No free integer registers!"); - } - - PhysRegIndex free_reg = freeIntRegs.front(); - - freeIntRegs.pop(); - - return(free_reg); -} - -inline PhysRegIndex -SimpleFreeList::getFloatReg() -{ - DPRINTF(FreeList, "Trying to get free float register.\n"); - - if (freeFloatRegs.empty()) { - panic("No free integer registers!"); - } - - PhysRegIndex free_reg = freeFloatRegs.front(); - - freeFloatRegs.pop(); - - return(free_reg); -} - -inline void -SimpleFreeList::addReg(PhysRegIndex freed_reg) -{ - DPRINTF(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) { - if (freed_reg != TheISA::ZeroReg) - freeIntRegs.push(freed_reg); - } else if (freed_reg < numPhysicalRegs) { - if (freed_reg != (TheISA::ZeroReg + numPhysicalIntRegs)) - freeFloatRegs.push(freed_reg); - } -} - -inline void -SimpleFreeList::addIntReg(PhysRegIndex freed_reg) -{ - DPRINTF(FreeList,"Freeing int register %i.\n", freed_reg); - - freeIntRegs.push(freed_reg); -} - -inline void -SimpleFreeList::addFloatReg(PhysRegIndex freed_reg) -{ - DPRINTF(FreeList,"Freeing float register %i.\n", freed_reg); - - freeFloatRegs.push(freed_reg); -} - -#endif // __CPU_O3_FREE_LIST_HH__ |