原码小数除法（复杂模型机实现）的报告要求只要机器码，注释和汇编都不要。原始文件内容如下：
$P 00 AA 00; IN R2,00H; 从IN单元读入一个被除数 $P 02 A9 00; IN R1,00H; 从IN单元读入一个除数 $P 04 D2 9F; ST R2,9F; R2->9F $P 06 24; MOV R0,R1; $P 07 96; XOR R0,R2; $P 08 BA 10; MOV R2,10H; $P 0A 38; AND R0,R2; 得到符号位 $P 0B D0 9A; ST R0,9A; 将符号位保存至内存单元 $P 0D C2 9F; LD R2,9F; $P 0F B8 00; MOV R0,00H; 商置零 $P 11 BB 0F; MOV R3,OFH; 0F->R3 $P 13 3D; AND R1,R3; 求出Y*补码在R1中 $P 14 3E; AND R2,R3; 被除数求绝对值X*补在R2中 $P 15 D2 9B; ST R2,9B; $P 17 16; SUB R2,R1; 判断是否溢出 $P 18 BB 10; MOV R3,10H; $P 1A 3E; AND R2,R3; $P 1B F2 04; JNZ START; 若无溢出则开始执行,即不等于0跳转 $P 1D BB FF; MOV R3,FFH; 若等于0则溢出则输出FF $P 1F AF 00; OUT 00H,R3; $P 21 C2 9B;START:LD R2,9B; $P 23 16; SUB R2,R1; 被除数减Y*补得余数 $P 24 BB 05; MOV R3,05H; 将R3次数置为5 $P 26 87; START1:DEC R3; $P 27 A4; PUSH R0; $P 28 A5; PUSH R1; $P 29 2D; MOV R1,R3; $P 2A B8 0F; MOV R0,0FH; $P 2C 33; AND R1,R0; 判断次数是否为零 $P 2D A1; POP R1; $P 2E A0; POP R0; $P 2F F3 15; JZ START2; 若为0跳转置 $P 31 A5; PUSH R1; $P 32 A4; PUSH R0; $P 33 B8 10; MOV R0,10H; $P 35 29; MOV R1,R2; $P 36 31; AND R1,R0; 判断余数R2的正负 $P 37 A0; POP R0; $P 38 A1; POP R1; $P 39 F3 05; JZ START3; 余数为正则跳置START3, $P 3B 8C; SHL R0; 上商0，商左移1位 $P 3C 8E; SHL R2; 余数左移1位 $P 3D 06; ADD R2,R1; 余数加上Y*补 $P 3E E7 26; JMP START1; 跳到START1，次数减1 $P 40 80; START3:INC R0; 若余数为正数上商1 $P 41 8C; SHL R0; 商左移一位 $P 42 8E; SHL R2; 余数左移1位 $P 43 16; SUB R2,R1; 余数减去Y*补 $P 44 E7 26; JMP START1; 跳到START1，次数减1 $P 46 BB 10;START2:MOV R3,10H; $P 48 29; MOV R1,R2; $P 49 3D; AND R1,R3; 判断最后一次余数符号位正负 $P 4A F3 02; JZ START4; 跳到START4(若为正则跳）若为负数,即上商0 $P 4C E7 4F; JMP START5; 跳到START5 $P 4E 80;START4:INC R0; 为正数上商1 $P 4F C3 9A;START5:LD R3,9A; $P 51 B9 0F; MOV R1,0FH; $P 53 34; AND R0,R1; $P 54 0C; ADD R0,R3; 得到带符号商 $P 55 AC 00; OUT OOH,R0; 将R0输出 $P 57 FF; HALT; $uM 00 6F0ED001 ;取指(MEM[PC]->IR),PC+1 $uM 04 5F0ED005 ;T2:MEM[PC]->B, T3:PC+1 $uM 05 3EA2F800 ;T1:PC->A, T3:A+B->PC $uM 06 7F0ED000 ;T3:PC+1 $uM 08 184AF800 $uM 09 184AF900 ;ADD Rdi,Ri T1:Rdi->A T2:Ri->B T3:A+B->Rdi $uM 0A 7D4AF000 ;MOV Rdi,Ri T2、T3:Ri->iDBus T3:iDBus->Rdi $uM 0B 184AF200 ;AND Rdi,Ri $uM 0C 184AF100 $uM 0D 184AF500 ;AND Rdi,Ri $uM 0E 190AF900 $uM 0F 190AF200 $uM 10 774BD011 $uM 11 3A6AFA00 $uM 12 3A6AFB13 $uM 13 750BB000;CMP Rdi,Ri T1:Rdi->A T2:Ri->B T3:影响的标志位->PSW $uM 14 7FCED015 ;T3:MEM[PC]->MAR, PC+1 $uM 15 7F49C000 ;T2:IO[[MAR]->Rdi $uM 16 7FCED017 ;T3:MEM[PC]->MAR, PC+1 $uM 17 7D09A000 $uM 18 7DCAF019 $uM 19 7F89D000 $uM 1A 3A6AFB1B $uM 1B 7703B01C $uM 1C 7DCAF01D $uM 1D 7F89D000 ;T2:Ri->IO[MAR] $uM 1E 7F4ED000 ;T3:MEM[PC]->Rdi, PC+1 $uM 20 7FCED021 ;T3:MEM[PC]->MAR, PC+1 $uM 21 7F49D000 $uM 22 7DCAF023 $uM 23 7F49D000 ;T3:MEM[MAR]->Rdi $uM 24 1AEED825 ;T1:Rdi->A, T2:MEM[PC]->B T3:A+B->MAR $uM 25 7F49D000 ;T3:MEM[MAR]->Rdi $uM 28 7FCED029 ;T3:MEM[PC]->MAR, PC+1 $uM 29 7D09B000 $uM 2A 3ACAF02B $uM 2B 7D09B000 $uM 2C 1AEED82D $uM 2D 7D09B000 $uM 30 3A4AFA00 ;T2:Ri->MEM[MAR] $uM 31 3A4AFB00 ;T1:Rdi->A T3:A-1->Rdi $uM 32 184AF300 $uM 33 3A4AF700 $uM 34 3A4AF600 $uM 35 184AF300 $uM 36 185AF800 $uM 37 185AF900 $uM 38 7F0AF000 $uM 39 7F0AF000 $uM 3A 7F0AF000 $uM 3B 7F0AFD00 $uM 3C 7F1AFD00 $uM 3D 7F0AFC00 $uM 3E 7F1AFC00 $uM 3F 7F0AF03F $uM 40 3A6AFB41 $uM 41 5F0ED064 $uM 42 570BD043 $uM 43 7FCED062 $uM 44 774BD045 $uM 45 3A6AFA46;T1:Rdi->A T2:Ri->B T3: A xor B ->Rdi $uM 46 778BD047 ;T3:MEM[SP]->PC //RET $uM 47 3A6AFA00 $uM 48 3A6AFB49 $uM 49 750BB000 $uM 4A 774BD04B $uM 4B 3A6AFA00 ;SP+1 $uM 4E 7F8AD000 ;T3:MEM[PC]->PC $uM 50 3A6AFB51 ;SP -1,不允许改变标志位 //CALL data $uM 51 5F0ED060 $uM 52 3ACAF053 $uM 53 7F49C000 $uM 54 3ACAF055 $uM 55 7D09A000 ;T2:MEM[PC]->B, T3:PC+1 $uM 60 7703B061 ;T2:PC->MEM[SP] $uM 61 7E9AF000 $uM 62 7E19B063 $uM 63 3A6AFA00 $uM 64 761BB000 ;T3:B->PCjava代码处理结果为： $P 00 AA 00 $P 02 A9 00 $P 04 D2 9F $P 06 24 $P 07 96 $P 08 BA 10 $P 0A 38 $P 0B D0 9A $P 0D C2 9F $P 0F B8 00 $P 11 BB 0F $P 13 3D $P 14 3E $P 15 D2 9B $P 17 16 $P 18 BB 10 $P 1A 3E $P 1B F2 04 $P 1D BB FF $P 1F AF 00 $P 21 C2 9B $P 23 16 $P 24 BB 05 $P 26 87 $P 27 A4 $P 28 A5 $P 29 2D $P 2A B8 0F $P 2C 33 $P 2D A1 $P 2E A0 $P 2F F3 15 $P 31 A5 $P 32 A4 $P 33 B8 10 $P 35 29 $P 36 31 $P 37 A0 $P 38 A1 $P 39 F3 05 $P 3B 8C $P 3C 8E $P 3D 06 $P 3E E7 26 $P 40 80 $P 41 8C $P 42 8E $P 43 16 $P 44 E7 26 $P 46 BB 10 $P 48 29 $P 49 3D $P 4A F3 02 $P 4C E7 4F $P 4E 80 $P 4F C3 9A $P 51 B9 0F $P 53 34 $P 54 0C $P 55 AC 00 $P 57 FF java代码如下： import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; /* * 2017/07/09 * 主要针对计算机组成原理课设中机器码后面的汇编注释进行清除，只保留机器码 */ public class StringPractice { public static void main(String[] args) throws IOException,FileNotFoundException{ // TODO Auto-generated method stub File file1 = new File("D:/JAVA/Demo/in.txt"); File file2 = new File("D:/JAVA/Demo/out.txt"); BufferedReader bReader; PrintWriter pWriter; String string; String[] aStrings = new String[10]; bReader = new BufferedReader(new FileReader(file1)); pWriter = new PrintWriter(new BufferedWriter(new FileWriter(file2))); while((string = bReader.readLine())!=null){ aStrings = string.split(";"); if(aStrings[0].length()==0)//判断是否遇到空行 break; //System.out.println(aStrings[0].length()); //System.out.println(aStrings[0].charAt(1)); pWriter.println(aStrings[0]);//写入首个字符串 } bReader.close(); pWriter.flush(); pWriter.close(); } }