(精品word)作业2—lab2指令集流水化实验—计算机体系结构.doc
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(精品word)作业2—lab2指令集流水化实验—计算机体系结构.doc

(精品word)作业2—lab2指令集流水化实验—计算机体系结构.doc

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(精品word)作业2—lab2指令集流水化实验—计算机体系结构(精品word)作业2—lab2指令集流水化实验—计算机体系结构(精品word)作业2—lab2指令集流水化实验—计算机体系结构Lab2指令集流水化实验报告学号:12281166姓名:崔雪莹Exercise1:WhatishexcodeforNOPorSLLR0,R0,R000000000H.Exercise2:Bylookingatthebinarycodeoftheinstruction,discoverthefollowingfields:Rs:00100,Rt:00011,Rd00101,16-bitImm(Imm16)0010100000100000,Shiftamount00000,FunctionCode100000,WriteMemWrite0andRegWrite1forthisinstruction。Whatisuseof16-bitImmediatefieldinthisinstruction?16位立即数是对branch指令来说的跳转目的地址的偏移地址,add指令没有作用。IfthesameinstructionwereaBranchinstruction,theimmediatefieldwouldhaverepresentedaBranchOffset。WhatisthepotentialTargetAddress43092立即数十进制表示为10272,目的地址为10272*4+2004=43092Exercise3:LWInstructionRs:01000,Rt00111,Rd32(00000),16-bitImm(Imm16)1111111100111000,Shiftamount29(11101),FunctionCode100011,WriteMemWrite0andRegWrite1forthisinstruction.WhatisuseofFunctionfiledandShiftAmountinthisinstruction?操作数表明操作为LW读操作,是指令操作的唯一标记,移位量是相对与移位指令来说移几位,在LW指令没有作用。IfthesameinstructionwereaBranchinstruction,theimmediatefieldwouldhaverepresentedaBranchOffset。WhatisthepotentialTargetAddress1204,(—200*4)+2004=1204.Exercise4:BranchTargetFoundAdress1204,IsItsameasEX。3是?BinputtoALU-200,Why?因为对于I型指令只有rs,rt和立即数,没有rd,是rs和立即数Imm运算的结果进行操作,所以B最终送ALU的是立即数而不是rt,ALUOut800,ALUOP=ADD,Why因为立即数是偏移量,所以运算器是对R8和—200求和,得到的为目的地址。LMD525252,Rdest7whythis?因为没有rd,但是是取800地址的内容,回送到R7里。RegWrite1,MemWrite0,WhataretwovaluesattheinputofverylastMUXintheWBstage525252,800,Whichvalueisselected525252,why因为最终写回的是525252的值,而不是ALU运算的结果800.FinalRegisterFileValues。R7,525252,R8,1000。Exercise5:SWinstructionRs:01000,Rt00111,Rd32(00000),16-bitImm(Imm16)1111111100111000,,Shiftamount28(11100),FunctionCode101011,WriteMemWrite1andRegWrite0forthisinstruction.WhatisuseofFunctionfiledandShiftAmountinthisinstruction?操作数表明操作为SW读操作,是指令操作的唯一标记,移位量是相对与移位指令来说移几位,在SW指令没有作用。IfthesameinstructionwereaBranchinstruction,theimmediatefieldwouldhaverepresentedaBranchOffset.WhatisthepotentialTargetAddress1204,(-200*4)+2004=1204。Exercise6: