FUJITSU FR family 32-bit microcontroller instruction manuel CM71-00101-5E - Manual (Page 148)

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CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.36 MULH (Multiply Half-word Data)
Multiplies the half-word data in the lower 16 bits of "Rj" by the half-word data in the
lower 16 bits of "Ri" as signed numbers, and stores the resulting signed 32-bit data in
the multiplication/division register (MDL).
The multiplication/division register (MDH) is undefined.
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MULH (Multiply Half-word Data)
Assembler format: MULH Rj, Ri
Operation: Rj × Ri
→
MDL
Flag change:
N: Set when the MSB of the "MDL" of the operation result is "1", cleared when the MSB is "0".
Z: Set when the "MDL" of the operation result is "0", cleared otherwise.
V: Unchanged
C: Unchanged
Execution cycles: 3 cycles
Instruction format:
N Z V C
C C – –
MSB LSB
1 0 1 1 1 1 1 1 Rj Ri