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test_mul.spin
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test_mul.spin
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dat
orgh 0
org 0
andn outb, ##$FFFF
or dirb, ##$FFFF
mov cnt, testc
mov ptra, #@tests
_test rdlong d, ptra++
rdlong s, ptra++
rdlong cz, ptra++
setcz cz wc, wz
mul d, s wc, wz ' TEST INSTRUCTION
setbc cz, #1 ' store C/Z
setbz cz, #0
rdlong r, ptra++ ' get the expected result
rdlong rcz, ptra++ ' get the expected flags
cmp d, r wz
if_nz jmp #_next
cmp cz, rcz wz
if_nz jmp #_next
mov d, testc ' set LED 0 to N
sub d, cnt
setb outb, d
_next
djnz cnt, #_test
end jmp #end
testc long (cnt-tests)/5
' d s cz r rcz
tests long $0000_0000, $0000_0000, %10, $0000_0000, %01 ' 0*0 = 0, C = MSB
long $0000_FFFF, $0000_0000, %10, $0000_0000, %01 ' n*0 = 0, C = MSB
long $0000_0000, $0000_FFFF, %10, $0000_0000, %01 ' 0*n = 0, C = MSB
long $0000_0001, $0000_0001, %11, $0000_0001, %00 ' 1*1 = 1, C = MSB
long $0000_B505, $0000_B505, %11, $8000_1219, %10 ' C = MSB
long $0000_FFFF, $0000_FFFF, %11, $FFFE_0001, %10 ' 65535 * 65535 = 4294836225, C = MSB
long $0000_7FFF, $0000_7FFF, %11, $3FFF_0001, %00 ' 32767 * 32767 = 1073676289, C = MSB
long $BADD_7FFF, $BADD_7FFF, %11, $3FFF_0001, %00 ' upper 16 bits ignored, C = MSB
cnt res 1
d res 1
s res 1
cz res 1
r res 1
rcz res 1