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Diffstat (limited to 'src/cpu/inorder/reg_dep_map.hh')
-rw-r--r-- | src/cpu/inorder/reg_dep_map.hh | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/src/cpu/inorder/reg_dep_map.hh b/src/cpu/inorder/reg_dep_map.hh new file mode 100644 index 000000000..ba2a8c8a3 --- /dev/null +++ b/src/cpu/inorder/reg_dep_map.hh @@ -0,0 +1,105 @@ +/* + * Copyright (c) 2007 MIPS Technologies, Inc. + * 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. + * + * Authors: Korey Sewell + * + */ + +#ifndef CPU_INORDER_REG_DEP_MAP_HH +#define CPU_INORDER_REG_DEP_MAP_HH + +#include <list> +#include <vector> + +#include "arch/isa_traits.hh" +#include "cpu/inorder/pipeline_traits.hh" + +class InOrderCPU; + +class RegDepMap +{ + typedef ThePipeline::DynInstPtr DynInstPtr; + + public: + RegDepMap(int size = TheISA::TotalNumRegs); + + ~RegDepMap() { } + + std::string name(); + + void setCPU(InOrderCPU *_cpu); + + /** Clear the Entire Map */ + void clear(); + + /** Insert all of a instruction's destination registers into map*/ + void insert(DynInstPtr inst); + + /** Insert an instruction into a specific destination register index onto map */ + void insert(unsigned idx, DynInstPtr inst); + + /** Remove all of a instruction's destination registers into map*/ + void remove(DynInstPtr inst); + + /** Remove a specific instruction and destination register index from map */ + void remove(unsigned idx, DynInstPtr inst); + + /** Remove Front instruction from a destination register */ + void removeFront(unsigned idx, DynInstPtr inst); + + /** Is the current instruction able to read from this destination register? */ + bool canRead(unsigned idx, DynInstPtr inst); + + /** Is the current instruction able to get a forwarded value from another instruction + * for this destination register? */ + DynInstPtr canForward(unsigned reg_idx, unsigned src_idx, DynInstPtr inst); + + /** find an instruction to forward/bypass a value from */ + DynInstPtr findBypassInst(unsigned idx); + + /** Is the current instruction able to write to this destination register? */ + bool canWrite(unsigned idx, DynInstPtr inst); + + /** Size of Dependency of Map */ + int depSize(unsigned idx); + + protected: + // Eventually make this a map of lists for + // efficiency sake! + std::vector<std::list<DynInstPtr> > regMap; + + InOrderCPU *cpu; +}; + +#endif + + + + + + + |