DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

3. Instruction Set
API Mnemonic Operands Function
21 D SUB P Subtraction
Controllers
ES2/EX2 SS2 SA2
SE
SX2
Type Bit Devices Word devices Program Steps
OP X Y M S K H KnX KnY KnM KnS T C D E F SUB, SUBP: 7 steps
S 1 * * * * * * * * * * * DSUB, DSUBP: 13 steps
S 2 * * * * * * * * * * *
D * * * * * * * *
PULSE 16-bit 32-bit
SA2
SX2 ES2/EX2 SS2 SX2 ES2/EX2 SS2
SE
ES2/EX2 SS2 SA2
SE
Operands:
S 1 : Minuend S 2 : Subtrahend D: Remainder
Explanations:
1. This instruction subtracts S 1 and S 2 in BIN format and stores the result in D
2. The MSB is the sign bit. 0 indicates positive and 1 indicates negative. All calculation is
algebraically processed.
3. If S 1 , S 2 and D use device F, only 16-bit instruction is applicable.
4. Flags: M1020 (Zero flag), M1021 (Borrow flag), M1022 (Carry flag). The flag operations of
ADD instruction can also be applied to the subtract instruction.
Program Example 1:
In 16-bit BIN subtraction:
When X0 = ON, the content in D0 will minus the content in D10 and the results will be stored in
D20
SA2
SE
SX2
X0
SUB D0 D10 D20
Program Example 2:
In 32-bit BIN subtraction:
When X10 = ON, the content in (D31, D30) will minus the content in (D41, D40) and the results will
be stored in (D51, D50). D30, D40 and D50 are low word; D31, D41 and D51 are high word
X20
DSUB D30 D40 D50
(D31, D30) − (D41, D40) = (D51, D50)
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