3. Instruction Set
32-bit value x 32-bit value = 64-bit value
If D is specified with a word device, it can specify K1~K8 to store a 32-bit result. Users can use
2 consecutive 32-bit registers to store 64-bit data.
If the product of a 32-bit multiplication must be a 32-bit value (32-bit value x 32-bit value =
32-bit value), users have to use API 114 MUL32/MUL32P. Please refer to the explanation of
API 114 MUL32/MUL32P for more information.
Program 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 MSB indicates the
positive/negative status of the operation result.
(D0) × (D10) = (D21, D20)
16-bit × 16-bit = 32-bit
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