计算机组成原理-cpu设计

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1、CPU设计及流程一．指令格式及功能表1.1指令的格式及功能指令助记符指令格式功能15~121110987~0MOVRd,im0010XXRdim传送指令，将立即数送入RdLAD(Rs),Rd0011RsRdxxxxxxxx取数指令，将（（Rs））送入RdADDRs,Rd0100RsRdxxxxxxxx加法指令，将（Rs）+(Rd)送RdINCRd0101XXRdxxxxxxxx加1，将(Rd)+1送RdANDRs,Rd1100RsRdxxxxxxxx乘法指令，将RsxRd送RdJNZaddr0111XXXXAddr条件转移指令，若不等，则addr->pcSTORs,addr1000RsXXAd

2、dr存数指令，将（Rs）->addrINaddr,Rd010001RdxxxxxxxxAddr送RdOUTaddr,Rd010110RdxxxxxxxxRd送addr二．指令的数据通路图一．微程序方框图开始PC->ABUS(I)RD指令CacheIBUS->IRPC+1译码或测试P1MOVLADADDINCANDJNZSTOINOUTJMPIR(A)->RdIR(A)->PCRd->addrAddr->RdIR（A）->ARRs->XRd->YX*Y->Rd锁存标志位Rd->YY+1->Rd锁存标志位Rs->XRd->YX+Y->Rd锁存标志位Rs->AR测试ZFP2ZF=0ZF=1Rs->D

3、BUSWE数据CacheIR(A)->PC三．微指令MOV123456789101112131415161718192021222324微地址LOADLDPCLDARLDIRLDRiLDPSWRs-BS2S1S0ALU-BRD-DCS-DRD-ICS-IARRD-BP1P2uA5uA4uA3uA2uA1uA0000000110100100010110110000000000111100110100010101000000000LAD123456789101112131415161718192021222324微地址LOADLDPCLDARLDIRLDRiLDPSWRs-BS2S1S0ALU-B

4、RD-DCS-DRD-ICS-IARRD-BP1P2uA5uA4uA3uA2uA1uA0000000110100100010110110000000000111100110000010101100000000ADD123456789101112131415161718192021222324微地址LOADLDPCLDARLDIRLDRiLDPSWRs-BS2S1S0ALU-BRD-DCS-DRD-ICS-IARRD-BP1P2uA5uA4uA3uA2uA1uA0000000110100100010110110000000000111100111100000101100000000INC1234

5、56789101112131415161718192021222324微地址LOADLDPCLDARLDIRLDRiLDPSWRs-BS2S1S0ALU-BRD-DCS-DRD-ICS-IARRD-BP1P2uA5uA4uA3uA2uA1uA0000000110100100010110110000000000111100111100000101100000000JNZ123456789101112131415161718192021222324微地址LOADLDPCLDARLDIRLDRiLDPSWRs-BS2S1S0ALU-BRD-DCS-DRD-ICS-IARRD-BP1P2uA5uA4u

6、A3uA2uA1uA0000000110100100010110110000000000111100000100010101101000000010000010000100010101000000000STO123456789101112131415161718192021222324微地址LOADLDPCLDARLDIRLDRiLDPSWRs-BS2S1S0ALU-BRD-DCS-DRD-ICS-IARRD-BP1P2uA5uA4uA3uA2uA1uA00000001101001000101101100000000001111011001000101010000000000100001001

7、11000011000110000000123456789101112131415161718192021微地址LOADLDPCLDARLDIRLDRiLDPSWRs-BS2S1S0ALU-BRD-DCS-DRD-ICS-IARRD-BP1P2uA5uA4uA3uA2uA1uA0000000110100100010110110000000000111010100100010100000000000