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OPERATION MOV
LOD
STO
PUSH
CALL CMP
INFORMATION
EXAMPLE
Assign values. MOV destination, source Load data into register Store data from register to variable Push value on top of stack Call function
MOV a, = ‘3’
NOTES
LOD R1, a
not to be used with R, only if permitted by the target machine architecture must use with R
STO RI, T1
must use with R
PUSH a CALL println
Compare between two values
not to be used with R not to be used with direct numbers
ARITHMETIC ARITHM ETIC OPERAT OPERATION ION ADD SUB
MUL
DIV
Add numbers
ADD R1, b
must use with R
Subtract numbers Multiply numbers Divide numbers
SUB R1, b
must use with R
MUL R1, b
must use with R
DIV R1, b
must use with R
BRANCH OPERATION B
Unconditional branch Conditional branch
B L2
BH
Branch if higher Branch if lower Branch if higher or even Branch if lower or even Label a place
BH L3
BL
BHE
BLE
L
BL L3 BHE L3 BLE L3 L2
1. if-else
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2. while
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exit if not
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loop
exit
3. for initialisation
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Boolean
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exit if not
increment (i++)/decrement (i--) loop
exit
Examples of operations: 5. if ( a > b) a = a+1 1. c = a + b; LOD R1, a ADD R1, b STO R1, c 2. a = 14; b = 12; println(a-b); MOV a, = ‘14’ MOV b, = ‘12’ LOD R1, a SUB R1, b STO R1, T1 PUSH T1 CALL PRINTLN
3. a + b + c LOD ADD ADD STO
R1, R1, R1, R1,
L1:
L2:
6. for ( a=1; a>=20; a++) y = y + 1
L1:
L2:
a b c T1 L3:
4. while (x <= a+b) x=2*x L1:
L2:
L3:
LOD R1, a ADD R1, b STO R1, T1 CMP x, T1 BLE L2 B L3 LOD R1, = ‘2’ MUL R1, x STO R1, x B L1
CMP a, b BH L1 B L2 LOD R1, a ADD R1, 1 STO R1, a
MOV a, =’1’ LOD R1, =’20’ STO R1, T1 CMP a, T1 BHE L2 B L3 LOD R1, y ADD R1, =’1’ STO R1, y LOD R1, a ADD R1, =’1’ STO R1, a B L1
