| /* |
| * 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_MULT_DIV_UNIT_HH__ |
| #define __CPU_INORDER_MULT_DIV_UNIT_HH__ |
| |
| #include <list> |
| #include <string> |
| #include <vector> |
| |
| #include "cpu/inorder/first_stage.hh" |
| #include "cpu/inorder/inorder_dyn_inst.hh" |
| #include "cpu/inorder/resource.hh" |
| #include "cpu/func_unit.hh" |
| #include "cpu/op_class.hh" |
| |
| class MDUEvent; |
| |
| class MultDivUnit : public Resource { |
| public: |
| typedef ThePipeline::DynInstPtr DynInstPtr; |
| |
| enum Command { |
| StartMultDiv, |
| EndMultDiv, |
| MultDiv |
| }; |
| |
| public: |
| MultDivUnit(std::string res_name, int res_id, int res_width, |
| Cycles res_latency, InOrderCPU *_cpu, |
| ThePipeline::Params *params); |
| |
| public: |
| /** Override default Resource getSlot(). Will only getSlot if |
| * valid mult/div sequence is being maintained |
| */ |
| int getSlot(DynInstPtr inst); |
| |
| void init(); |
| |
| /** Get Operand Size For A Division Operation */ |
| int getDivOpSize(DynInstPtr inst); |
| |
| /** Override default Resource execute */ |
| void execute(int slot_num); |
| |
| void exeMulDiv(int slot_num); |
| |
| /** Register extra resource stats */ |
| void regStats(); |
| |
| void requestAgain(DynInstPtr inst, bool &try_request); |
| |
| void squash(DynInstPtr inst, int stage_num, InstSeqNum squash_seq_num, |
| ThreadID tid); |
| |
| protected: |
| /** Latency & Repeat Rate for Multiply Insts */ |
| unsigned multRepeatRate; |
| Cycles multLatency; |
| |
| /** Latency & Repeat Rate for 8-bit Divide Insts */ |
| unsigned div8RepeatRate; |
| Cycles div8Latency; |
| |
| /** Latency & Repeat Rate for 16-bit Divide Insts */ |
| unsigned div16RepeatRate; |
| Cycles div16Latency; |
| |
| /** Latency & Repeat Rate for 24-bit Divide Insts */ |
| unsigned div24RepeatRate; |
| Cycles div24Latency; |
| |
| /** Latency & Repeat Rate for 32-bit Divide Insts */ |
| unsigned div32RepeatRate; |
| Cycles div32Latency; |
| |
| /** Last cycle that MDU was used */ |
| Tick lastMDUCycle; |
| |
| /** Last type of instruction MDU started processing */ |
| OpClass lastOpType; |
| |
| /** Last Division Operand of instruction MDU was processing */ |
| uint32_t lastDivSize; |
| |
| /** Last instruction name the MDU used */ |
| std::string lastInstName; |
| |
| /** Number of Multiplies */ |
| Stats::Scalar multiplies; |
| |
| /** Number of Divides */ |
| Stats::Scalar divides; |
| |
| MDUEvent *mduEvent; |
| }; |
| |
| class MDUEvent : public ResourceEvent |
| { |
| public: |
| MDUEvent(); |
| ~MDUEvent() { } |
| |
| |
| void process(); |
| }; |
| |
| |
| #endif //__CPU_INORDER_MULT_DIV_UNIT_HH__ |