Fujitsu CM71-00101-5E User Manual
139
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.45
LSL (Logical Shift to the Left Direction)
Makes a logical left shift of the word data in "Ri" by "u4" bits, stores the result to "Ri".
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LSL (Logical Shift to the Left Direction)
Assembler format:
LSL #u4, Ri
Operation:
Ri << u4
→
Ri
Flag change:
N: Set when the MSB of the operation result is "1", cleared when the MSB is "0".
Z: Set when the operation result is "0", cleared otherwise.
V: Unchanged
C: Holds the bit value shifted last. Cleared when the shift amount is "0".
Execution cycles:
1 cycle
Instruction format:
Example:
LSL #8, R3
N
Z
V
C
C
C
–
C
MSB
LSB
1
0
1
1
0
1
0
0
u4
Ri
R3
R3
F F F F F F 0 0
F F F F F F F F
N Z V C
CCR
CCR
N Z V C
1 0 0 1
0 0 0 0
Instruction bit pattern :
1011 0100 1000 0011
Before execution
After execution