.include "macros.inc"
start
test_name SEXTH_1
mvi r1, 0
sexth r3, r1
check_r3 0
test_name SEXTH_2
load r1 0x7fff
check_r3 0x00007fff
test_name SEXTH_3
load r1 0x8000
check_r3 0xffff8000
end