--- /dev/null
+.include "macros.inc"
+
+start
+
+test_name XNORI_1
+mvi r1, 0
+xnori r3, r1, 0
+check_r3 0xffffffff
+
+test_name XNORI_2
+mvi r1, 0
+xnori r3, r1, 1
+check_r3 0xfffffffe
+
+test_name XNORI_3
+mvi r1, 1
+xnori r3, r1, 1
+check_r3 0xffffffff
+
+test_name XNORI_4
+mvi r1, 1
+xnori r3, r1, 0
+check_r3 0xfffffffe
+
+test_name XNORI_5
+load r1 0xaa55aa55
+xnori r3, r1, 0x5555
+check_r3 0x55aa00ff
+
+test_name XNORI_6
+load r3 0xaa55aa55
+xnori r3, r3, 0x5555
+check_r3 0x55aa00ff
+
+end