机组课后作业.docx

2.27fff fffa(hex)=0111 1111 1111 1111 1111 1111 1111 1010(two)= 2,147,483,642(ten)2.3Cafe face(hex)2.4由于MIPS包括增加直接和立即可以是正数或负的，减去立即将是多余的2.15set_array: addi $sp,$sp,-52sw $fp,48($sp)sw $ra,44($sp)sw $a0,40($sp)addi $fp,$sp,48add $s0,$0,$0addi $t0,$0,10loop: sll $t1,$s0,2add $t2,$fp,$t1add $a0,$0,$0add $a1,$s0,$0jal comparesw $v0,0($t2)addi $s0,$s0,1bne $s0,$t0,looplw $a0,40($sp)lw $ra,44($sp)lw $fp,48($sp)addi $sp,$sp,52jr $racompare:addi $sp,$sp,-8sw $fp,4($sp)sw $ra,0($sp)addi $fp,$sp,4jal subslt $v0,$v0,$0slti $v0,$v0,1lw $ra,0($sp)lw $fp,4($sp)addi $sp,$sp,8jr $rasub:sub $v0,$a0,$a1jr $ra2.29add $t0,$0,$0 #sum=0;loop:beq $a1,$0,finish #if(b=0)finishadd $to,$t0,$a0 #sum=sum+asub $a1,$a1,1 #b- -j loopfinish:addi $t0,$t0,100 #sum+=100add $v0,$t0,$0 #return sum计算的是：a*b+1002.30sll $a2,$a2,2 #i=2500*4sll $a3,$a3,2 #j=2500*4add $v0,$zero,$zero #$v0=0add $t0,$zero,$zero #i=0outer:add $t4,$a0,$t0 #$t4=address array1ilw $t4,0($t4) #$t4=array1iadd $t1,$0,$0 #j=0inner:add $t3,$a1,$t1 #$t3=address array2lw $t3,0($t3) #$t3=array2jbne $t3,$t4,skip #if (array li != array 2j) skipaddi $v0,$v0,1 #$v0+skip:addi $t1,$t1,4 #j+bne $t1,$a3,inner #if(j!=2500*4) inneraddi $t0,$t0,4 # i+bne $t0,$a2,outer #if(i!=2500*4)outer代码作用：array1和array2 元素相等的个数，在$v0中返回元素个数3.21111 1111 1111 1111 1111 1000 0000 0001(two)3.62147483631(ten)3.7addu $t2, $zero, $t3 bgez $t3, nextsub $t2, $zero, St3next:3.12blt $s0,$s1,L1add $t0,$0,$0L1:addi $t0,$0,13.3720ten=10100twoSign=0,Significand=0100single exponent=4+127=131double exponent=4+1023=1027single :0 1000 O1l0 1000 0000 0000 0000 0000 000Double:0 1000 0000 011 0100 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 00003.38Single:0 1000 0011 010 0100 0000 0000 0000 0000Double:0 1000 0000 01l 0100 1000 0000 0000 0000 0000 0000 0000 0000 0000 0000 00003.430 10111111011 1110010000000000000001010001111110000000 0000 0000 0000一。确定差异指数：1011 1111-101000110011100 - 28缩放后添加signiiicands：1.0111110 01000000000000000000000000000000 00000000 00000.0000000 0000 0000 00000000 000011111000 000000000000 00001.011111001000000000000000000 11111000 0000 0000 0000 OOOO圆（截断）和打包：010111111011 11100100 000000000000。010111111011111001000000 0000 OOOO二。