# This program adds two values stored in memory.
# This is not a particularly general purpose program, but
# it illustrates how some of the MIPS instructions operate.
# The system call codes are described in Appendix A, p A-43.

        .data   # The following entries go in the data segment
eol:    
        .asciiz "\n"
strA:
        .asciiz " plus "
strB:
        .asciiz " equals "
val:
        .word   2,3

        .text   # The following entries go in the text (program code) segment
main:
        la      $a0,eol         # load address of the string to print
        li      $v0,4           # load print_string code
        syscall                 # ask the system to print the string

        lw      $a0,val         # put the first value in $a0 for printing
        li      $v0,1           # load print_integer code
        syscall                 # ask the system to print the integer

        la      $a0,strA        # load address of the string to print
        li      $v0,4           # load print_string code
        syscall                 # ask the system to print the string

        lw      $a0,val+4       # put the second value in $a0 for printing
        li      $v0,1           # load print_integer code
        syscall                 # ask the system to print the integer

        la      $a0,strB        # load address of the string to print
        li      $v0,4           # load print_string code
        syscall                 # ask the system to print the string

        lw      $t0,val         # load first value to add
        lw      $t1,val+4       # load second value to add
        add     $a0,$t0,$t1     # add and put result in $a0
        li      $v0,1           # load print_integer code
        syscall                 # ask the system to print the string

        la      $a0,eol         # load address of the string to print
        li      $v0,4           # load print_string code
        syscall                 # ask the system to print the string

        jr      $ra             # return