Omron CS1G/H-CPUxxH Instructions Manual page 358

Data Shift Instructions
Description
Flags
Precautions
Examples
Area
Indirect DM/EM
addresses in BCD
Constants
Data Registers
Index Registers
Indirect addressing
using Index Registers
RRNL(577) shifts all bits of Wd and Wd +1 to the right (from leftmost bit to
rightmost bit) not including the Carry Flag (CY).
Name
Error Flag ER
Equals Flag =
Carry Flag CY
Negative Flag N
When RRNL(577) is executed, the Error Flag will turn OFF.
If as a result of the shift the contents of Wd and Wd +1 are zero, the Equals
Flag will turn ON.
If as a result of the shift the contents of the leftmost bit of Wd + 1 is 1, the Neg-
ative Flag will turn ON.
Note It is possible to set the Carry Flag contents to 1 or 0 immediately before exe-
cuting this instruction, by using the Set Carry (STC(040)) or Clear Carry
(CLC(041)) instructions.
When CIO 000000 is ON, words CIO 0100 and CIO 0101 will shift one bit to
the right, (excluding the Carry Flag (CY)). The contents of CIO 010000 will be
shifted to CIO 010115.
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
---
---
---
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
Wd+1
Label
OFF
ON when the shift result is 0.
OFF in all other cases.
ON when 1 is shifted into the Carry Flag (CY).
OFF in all other cases.
ON when the leftmost bit is 1 as a result of the shift.
OFF in all other cases.
Wd
Wd+1: CIO 0101
Instruction executed once
Section 3-9
Wd
Wd
Operation
Wd: CIO 0100
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