--- /dev/null
+.include "macros.inc"
+
+start
+
+test_name ADDI_1
+mvi r1, 0
+addi r3, r1, 0
+check_r3 0
+
+test_name ADDI_2
+mvi r1, 0
+addi r3, r1, 1
+check_r3 1
+
+test_name ADDI_3
+mvi r1, 1
+addi r3, r1, 0
+check_r3 1
+
+test_name ADDI_4
+mvi r1, 1
+addi r3, r1, -1
+check_r3 0
+
+test_name ADDI_5
+mvi r1, -1
+addi r3, r1, 1
+check_r3 0
+
+test_name ADDI_6
+mvi r1, -1
+addi r3, r1, 0
+check_r3 -1
+
+test_name ADDI_7
+mvi r1, 0
+addi r3, r1, -1
+check_r3 -1
+
+test_name ADDI_8
+mvi r3, 4
+addi r3, r3, 4
+check_r3 8
+
+test_name ADDI_9
+mvi r3, 4
+addi r3, r3, -4
+check_r3 0
+
+test_name ADDI_10
+mvi r3, 4
+addi r3, r3, -5
+check_r3 -1
+
+end
+