CODEWITHSUNDEEP
assemblymipsmips32mips64
Ben Bitdiddle
Ben Bitdiddle

Reputation: 35

Difference between store word,load word and move

I am new to mips assembly. I cant get what exactly those instructions do so I try to test it. This a code to switch values of the registers t0 and t1.

# Perform swap.
    lw  $t3, 0($t0)
    lw  $t4, 0($t1) 
    sw  $t3, 0($t1)
    sw  $t4, 0($t0)

The code seems reasonable,storing their values in t3 and t4 and then swapping them. The thing I can't understand here is why we cant use move or load word here instead of store word? For example why the code cant not be like this?

# Perform swap.
    lw  $t3, 0($t0)
    lw  $t4, 0($t1) 
    move $t1,$t3
    move $to,$t4

Or like this

# Perform swap.
lw  $t3, 0($t0)
lw  $t4, 0($t1) 
lw  $t1,0($t3)
lw $t2,0($t4)

Upvotes: 0

Views: 13063

Answers (1)

nissim abehcera
nissim abehcera

Reputation: 831

Store word (4 bytes) : to take content from register and store it in memory

Load word (4 bytes): It's strictly the opposite, get value from memory emplacement and store it in register

Move: it's copy value from register 1 (for example) and put it to another register

Upvotes: 1

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