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2 Instructions
CP1E CPU Unit Instructions Reference Manual(W483)
Data Shift Instructions
2
SLD/SRD
SLD/SRD
Applicable Program Areas
Operands
Operand Specifications
Flags
Function
SLD
SLD(074) shifts data between St and E by one digit (4 bits) to the left. “0” is placed in the rightmost digit
(bits 3 to 0 of St), and the content of the leftmost digit (bits 15 to 12 of E) is lost.
SRD
SRD(075) shifts data between St and E by one digit (4 bits) to the right. “0” is placed in the leftmost digit
(bits 15 to 12 of E), and the content of the rightmost digit (bits 3 to 0 of St) is lost.
Precautions
Instruction Mnemonic Variations
Function
code
Function
ONE DIGIT SHIFT LEFT SLD @SLD 074 Shifts data by one digit (4 bits) to the left.
ONE DIGIT SHIFT RIGHT SRD @SRD 075 Shifts data by one digit (4 bits) to the right.
Symbol
SLD SRD
Area Step program areas Subroutines Interrupt tasks
Usage OK OK OK
Operand Description Data type Size
St Starting Word UINT Variable
E End Word UINT Variable
Area
Word addresses Indirect DM addresses
Constants CF Pulse bits TR bits
CIO WR HR AR T C DM @DM *DM
St,E OK OK OK OK OK OK OK OK OK --- --- --- ---
Name Label Operation
Error Flag P_ER • ON when St is greater than E.
• OFF in all other cases.
• St and E must be in the same data
area.
• When large amounts of data are
shifted, the instruction execution
time is quite long. Be sure that the
power is not cut while SLD(074) and
SRD(075) is being executed, caus-
ing the shift operation to stop half-
way through.
SLD
SRD
SLD(074)
St
E E: End word
St: Starting Word
SRD(075)
St
E
E: End word
St: Starting Word
ESt
Lost
0Hex
ES
Lost
t
0Hex