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Chapter 5 Instruction Specifications
5-74
Item number Application instructions-5 Name Shift left
Ladder format Condition code
Processing time (µs)
Remark
R7F4 R7F3 R7F2 R7F1 R7F0
Average Maximum
SHL (d, n) DER ERR SD V C Upper case: W
zzzz
↕
38
Lower case: DW
Instruction format Number of steps
Condition Steps
SHL (d, n) 3 46
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 shifted {{{ {{
n
Number of bits to be
shifted
{{{{ {
The constant is set in
decimal.
Function
• Shifts the contents of d to the left (toward the upper digits) by n bits.
• Sets n bits of SD (R7F2) contents starting with the least significant bit.
• Sets the content of the nth bit from the most significant bit in C (R7F0).
SD
B
SD SD SD
SD
SD
SD (R7F2)
C (R7F0)
B
d
n bits
Most significant bit (MSB)
Least significant bit (LSB)
B
efore execution
A
fter execution
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 shifting is not performed. The previous state is retained in C.
Program example
X00000
LD X00000
OUT R7F2
LD X00001
AND DIF1
[
SHL (DR0000,1)
]
LD R7F0
OUT Y00100
X00001 DIF1
SHL (DR0000 ,1 )
R7F2
R7F0
Y00100
Program description
• The R7F2 value is determined by the on/off of X00000.
• The content of DR0000 is shifted to the left by one bit when X00001 rises.
At this time, the value of R7F2 is set in b0 and the value of b31 (b15 of WR1) in R7F0.
• The Y00100 turns on/off depending on the b31 value of DR0000 (b15 of WR1) prior to the shift.
SHL (d, n)