Systems Architecture
7th Edition
ISBN: 9781305080195
Author: Stephen D. Burd
Publisher: Cengage Learning
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.text
main:
li $a0,5
jal func1
li $v0,1
syscall
j func3
func1:
addiu $sp, $sp, -8
sw $ra, 4($sp)
sw $a0, 0($sp)
addi $a0,$a0,5
jal func2
lw $a0, 0($sp)
lw $ra, 4($sp)
jr $ra
func2:
addi $a0,$a0,5
jr $ra
func3:
li $v0,10
syscall
Make changes in this program to use jalr instead of jal. Write down your changes
.text
main:
li $a0,5
jal func1
li $v0,1
syscall
j func3
func1:
addiu $sp, $sp, -8
sw $ra, 4($sp)
sw $a0, 0($sp)
addi $a0,$a0,5
jal func2
lw $a0, 0($sp)
lw $ra, 4($sp)
jr $ra
func2:
addi $a0,$a0,5
jr $ra
func3:
li $v0,10
syscall
func1 is supposed to free-up stack before it returns back to the caller. Write down the instruction we must use to free-up stack.
Character devices move data faster than block devices. True or not?
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