Chapter 7 Second Development PlatformVP3000
311
API Instruction code Operand Function
22 D MUL P S
1
, S
2
, D BIN multiplication
Type
Operand
Bit devices Word devices
16-bit instruction (7 steps)
MUL
ontinuous
execution
type
MULP
Pulse
execution
type
32-bit instruction (13 steps)
DMUL
ontinuous
execution
type
DMULP
Pulse
execution
type
Associated flag: none
X Y M K H KnX KnY KnM T C D
S
1
S
2
D
Caution for using operand
In 16-bit instruction, operand D occupies 2 consecutive devices.
Description
S
1
: Multiplicand
S
2
: Multiplicator
D: Product
This instruction multiplies S
1
by S
2
in BIN format and stores the result in D.
In 16-bit BIN multiplication,
When D serves as a bit device, it can designate K1–K4 and construct a 16-bit result, occupying
consecutive 2 groups of 16-bit data.
Example
The 16-bit D0 is multiplied by the 16-bit D10 and brings forth a 32-bit product. The higher 16
bits are stored in D21 and the lower 16-bit are stored in D20. ON / OFF of the most left bit
indicates the positive / negative status of the result value.
X0
D0 D10
D20
MUL
D0 D10
K8M0
MUL
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