Omron CS1G/H-CPUxxH Instructions Manual page 341

Data Shift Instructions
Description
Flags
Precautions
Examples
320
Area
Constants
Data Registers
Index Registers
Indirect addressing
using Index Registers
ASLL(570) shifts the contents of Wd and Wd +1 one bit to the left (from right-
most bit to leftmost bit). "0" is placed in the rightmost bit of Wd and the con-
tents of the leftmost bit of Wd and Wd +1 are shifted into the Carry Flag (CY).
Name Label
Error Flag ER
Equals Flag =
Carry Flag CY
Negative Flag N
When ASLL(570) 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.
When CIO 000000 is ON, word CIO 0100 and CIO 0101 will shift one bit to
the left. "0" is placed into CIO 010000 and the contents of CIO 010015 will be
shifted to the Carry Flag (CY).
Wd
---
---
---
,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
Operation
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.
Section 3-9
Wd
Wd