[理工] [計算機組織]-MIPS語言

[gn00618777 (123)]

Pseudoinstruction  what is accomplishes    Solution
mov $t5,$t3         $t5=$t3                add $t5,$t3,$zero
clear $t5           $t5=0
li $t5,small        $t5=small
li $t5,big          $t5=big
lw $t5,big($t3)     $t5=Memory[$t3+big]
addi $t5,$t3,big    $t5=$t3+big
beq $t5,small,L     if($t5=small) go to L
beg $t5,big,L       if($t5=big)go to L
ble $t5,$t3,L       if($t5<=$t3)go to L
bgt $t5,$t3,L       if($t5>$t3) go to L
bge $t5,$t3,L       if($t5>=$t3)go to L

Q:for each pseudoinstructions in the following table,produce
  a minimal sequence of actural MIPS instructions to accomplish
  the same thing. You may need to use $at for some of the sequences
  In the following table,big refers to aspecific number that requires 32bits
  to respent and small to a number that can be express using 16bits

請問這個題目要你幹嘛＝ ＝ 參詳了很久不知如何下手
能否大大能講解一下，我想知道他要我們幹嘛

92年成大資工

--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 218.168.60.36
→ BF3716:要你以最少的MIPS指令去完成假指令該做的內容
→ BF3716:第一題mov $t5,$t3就要改成add $t5,$t3,$zero才有辦法執行
→ gn00618777:前面的指令不能執行哦＝ ＝ 我以為可以執行的說
→ gn00618777:我有趣查一下MIPS指令 他是不是沒有move 指令？
→ gn00618777:第一行要你完成$t5=$t3 照ex給的 add $t5,$t3,$zero
→ gn00618777:代表的是$t3+0放到$t5 就會等於$t5=$t3
→ gn00618777:照以前寫程式的觀念 $t5和$t3又沒初始怎麼能$t5=$t3
推 BF3716:就當成$t5和$t3裡面已經有data,而你只要完成$t5<--$t3就好
→ BF3716:而你只能用MIPS能用的指令去完成,而且還規定是最少指令完成