1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
###############################################################################
# File : add.asm
# Project : MIPS32 MUX
# Author: : Grant Ayers (ayers@cs.stanford.edu)
#
# Standards/Formatting:
# MIPS gas, soft tab, 80 column
#
# Description:
# Test the functionality of the 'add' instruction.
#
###############################################################################
.section .test, "x"
.balign 4
.set noreorder
.global test
.ent test
test:
lui $s0, 0xbfff # Load the base address 0xbffffff0
ori $s0, 0xfff0
ori $s1, $0, 1 # Prepare the 'done' status
#### Test code start ####
lui $t0, 0xffff # A = 0xfffffffd (-3)
ori $t0, 0xfffd
ori $t1, $0, 0x3 # B = 0x3
add $t2, $t0, $t1 # C = A + B = 0
sltiu $v0, $t2, 1 # D = 1 if C == 0
#### Test code end ####
sw $v0, 8($s0) # Set the test result
sw $s1, 4($s0) # Set 'done'
$done:
jr $ra
nop
.end test