47 lines
1.8 KiB
ArmAsm
47 lines
1.8 KiB
ArmAsm
.data
|
|
sentence:
|
|
.ascii "Become a Programmer\0" # The string to search in
|
|
match:
|
|
.ascii "bpera\0" # The string containing characters to search for in sentence
|
|
out:
|
|
.space 4, 0 # Space to store the match count
|
|
|
|
.text
|
|
.align 2
|
|
.globl _start
|
|
|
|
_start:
|
|
la t0, sentence # Load the address of the sentence string into t0
|
|
la a0, match # Load the address of the match string into a0
|
|
la s2, out # Load the address of the out variable (match counter) into s2
|
|
lbu s3, 0(s2) # Load the current match counter from out into s3
|
|
|
|
check_match:
|
|
lbu t1, 0(a0) # Load the current character from match into t1
|
|
beq t1, zero, done # If we reach the end of match (t1 == 0), finish the program
|
|
|
|
# Search for the current character from match in sentence
|
|
la t0, sentence # Reload the address of the sentence string
|
|
j find_in_sentence # Jump to search for the current character in sentence
|
|
|
|
find_in_sentence:
|
|
lbu t2, 0(t0) # Load the current character from sentence into t2
|
|
beq t2, zero, next_match # If we reach the end of sentence (t2 == 0), move to next character in match
|
|
|
|
# If the characters match, increment the match counter
|
|
bne t1, t2, not_found # If characters do not match, continue searching
|
|
addi s3, s3, 1 # If characters match, increment the match counter
|
|
sb s3, 0(s2) # Store the updated match counter back to out
|
|
|
|
not_found:
|
|
addi t0, t0, 1 # Move to the next character in sentence
|
|
j find_in_sentence # Repeat the search
|
|
|
|
next_match:
|
|
addi a0, a0, 1 # Move to the next character in match
|
|
j check_match # Continue checking for the next character in match
|
|
|
|
done:
|
|
ebreak # End the program
|
|
|