36 mulh (multiply half-word data), Mulh (multiply half-word data) – FUJITSU FR family 32-bit microcontroller instruction manuel CM71-00101-5E User Manual

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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.

■

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:

–

MSB

LSB