43 lines
1.3 KiB
ArmAsm
43 lines
1.3 KiB
ArmAsm
.data
|
|
sentence:
|
|
.ascii "Become a Prograammermmmmmrr\0"
|
|
match:
|
|
.ascii "abc \0"
|
|
out:
|
|
.space 256, 0
|
|
|
|
.text
|
|
.align 2
|
|
.globl _start
|
|
|
|
_start:
|
|
la t0, sentence # Load the address of sentence into t0
|
|
|
|
read_str:
|
|
lbu t1, 0(t0) # Load unsigned byte from sentence into t1
|
|
beq t1, zero, read_str_done # If end of string (\0), exit loop
|
|
|
|
la a0, match # Load address of match into a0
|
|
la s2, out # Load address of out into s0
|
|
|
|
iteruj_match:
|
|
lbu a1, 0(a0) # Load unsigned byte from match into a1
|
|
beq a1, zero, done_match # If end of match string (\0), exit inner loop
|
|
|
|
bne t1, a1, 1f # If t1 != a1, skip increment
|
|
|
|
lbu s10, 0(s2) # Load current counter value from out into s10
|
|
addi s10, s10, 1 # Increment counter
|
|
sb s10, 0(s2) # Store updated counter back to out
|
|
|
|
1:
|
|
addi s0, s0, 1
|
|
j iteruj_match # Jump back to start of inner loop
|
|
done_match:
|
|
|
|
addi t0, t0, 1 # Increment pointer to the next character in sentence
|
|
j read_str # Jump back to start of outer loop
|
|
|
|
read_str_done:
|
|
ebreak # End program
|