Fujitsu CM71-00101-5E User Manual
124
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.
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:
N
Z
V
C
C
C
–
–
MSB
LSB
1
0
1
1
1
1
1
1
Rj
Ri