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Chapter 5 Instruction Specifications
5-76
Item number Application instructions-7 Name Rotate left
Ladder format Condition code
Processing time (µs)
Remark
R7F4 R7F3 R7F2 R7F1 R7F0
Average Maximum
ROL (d, n) DER ERR SD V C Upper case: W
zzzz
↕
46
Lower case: DW
Instruction format Number of steps
Condition Steps
ROL (d, n) 3 54
Bit Word Double word
Usable I/O
XY
R,
M
TD, SS,
CU, CT WX WY
WR,
WM TC DX DY
DR,
DM
Constant
Other
d I/O to be rotated {{{ {{
n
Number of bits to be
rotated
{{{{ {
The constant is set in
decimal.
Function
• Rotates the contents of d to the left (toward the upper digits) by n bits.
• The content of C (R7F0) is set in the nth bit from the least significant bit.
• The content of the nth bit from the least significant bit is set in C (R7F0).
Bn
C (R7F0)
d
BnB1 B2 B3
C B1 B2 B3
Bn-1
Least significant bit (LSB)
Before execution
After execution
n bits
Most significant bit (MSB)
n bits
If d is a word: Designates the shift amount, depending on the contents (0 to 15) of the lower 4 bits (b3 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 15 (decimal).
If d is a double word: Designates the shift amount, depending on the contents (0 to 31) of the lower 5 bits (b4 to b0) of n
(WX, WY, WR, WM, TC). (Upper bits are ignored and considered as “0.”)
The n (constant) can be set to 0 to 31 (decimal).
Notes
• If n is equal to “0,” the rotation is not performed. The previous state is retained in C.
ROL (d, n)