Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual page 444

Data Shift Instructions
Description
Flags
Precautions
404
Area
Counter Area
DM Area
EM Area without bank
EM Area with bank
Indirect DM/EM
addresses in binary
Indirect DM/EM
addresses in BCD
Constants
Data Registers
Index Registers
Indirect addressing
using Index Registers
NASR(581) shifts D (the shift word) by the specified number of binary bits
(specified in C) to the right (from the rightmost bit to the leftmost bit). Either
zeros or the value of the rightmost bit will be placed into the specified number
of bits of the shift word starting from the rightmost bit.
Contents of "a" or
"0" shifted in
Name Label
Error Flag ER
Equals Flag =
Carry Flag CY
Negative Flag N
For any bits which are shifted outside the specified word, the contents of the
last bit is shifted to the Carry Flag (CY), and all other data is discarded.
When the number of bits to shift (specified in C) is "0," the data will not be
shifted. The appropriate flags will turn ON and OFF, however, according to
data in the specified word.
D
C0000 to C4095
D00000 to D32767
E00000 to E32767
En_00000 to En_32767
(n = 0 to C)
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
---
DR0 to DR15
---
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
N bits
Operation
ON when the control word C (the number of bits to shift) is
not within range.
OFF in all other cases.
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.
Section 3-9
C
Specified values only
Lost