# print a string one-char-at-a-time using a loop # # code uses registers a0, a7, t0, t1, t2 # # Note: string contains only ASCII characters. UTF-8 has many more # multi-byte characters. .data string: .asciz "Wow, does it work?" .text main: # step 1. setup to print null terminated string chars (ASCII) la t0, string # address of the first char (byte) of a string li t1, 0 # initialize string char index start_print_loop: # step 2. load string's (ASCII) char into a0 add t2, t1, t0 # set t2 to address of string char (t0 + t1) lbu a0, 0(t2) # load char (byte) unsigned # step 3. end of string? (a0 == null char) beq a0, zero, end_print_loop # If string char is null, exit the loop # step 4. print string char li a7, 11 # service code 11 = Print character ecall # step 5. Advance to the next char (byte) addi t1, t1, 1 # Increment string char index # step 6. loop j start_print_loop # Jump back to the start of the loop end_print_loop: # step 7. exit program li a0, 0 # returned value li a7, 93 # exit program ecall # Trigger exit system call