#
# code from 1/22 class
#
#### start of standard boilerplate
        .text
        .globl  main
main:
#
# opening linkage (save return address)
#
        addi    $sp, $sp, -4
        sw      $ra, 0($sp)
#### end of standard boilerplate

# C code:
# f = (g + h) - (i + j)
# where all variables are 32-bit integers

# for purposes of discussion, put these variables one after another in
#   an area labeled "Local"

# register usage:
# $s0 for f
# $s1 for g
# $s2 for h
# $s3 for i
# $s4 for j
# $s5 for address of Local
	la	$s5, Local      # $s5 <- &Local
	lw	$s1, 4($s5)     # $s1 <- g
	lw	$s2, 8($s5)     # $s2 <- h
	lw	$s3, 12($s5)    # $s3 <- i
	lw	$s4, 16($s5)    # $s4 <- h
	add	$t0, $s1, $s2   # $t0 <- g + h
	add	$t1, $s3, $s4   # $t1 <- i + j
	sub	$s0, $t0, $t1   # $s0 <- (g + h) - (i + j)
	sw	$s0, 0($s5)     # f <- $s0
#### start of more standard boilerplate
#
# closing linkage (get return address and restore stack pointer)
#
        lw      $ra, 0($sp)
        addi    $sp, $sp, 4
        jr      $ra
        .end    main
        .data
#### end of standard boilerplate
#
# area for variables and constants
#
# example:
Local:  .word   1, 4, 2, 3, 1 # values for f, g, h, i, j