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2 Instructions
2-134
CP1E CPU Unit Instructions Reference Manual(W483)
ASR
Applicable Program Areas
Operands
Operand Specifications
Flags
Function
Sample program
Instruction Mnemonic Variations
Function
code
Function
ARITHMETIC SHIFT RIGHT ASR @ASL 026 Shifts the contents of Wd one bit to the right.
Symbol
ASR
Area Step program areas Subroutines Interrupt tasks
Usage OK OK OK
Operand Description Data type Size
Wd Word UINT 1
Area
Word addresses Indirect DM addresses
Constants CF Pulse bits TR bits
CIO WR HR AR T C DM @DM *DM
Wd OK OK OK OK OK OK OK OK OK --- --- --- ---
Name Label Operation
Error Flag P_ER OFF
Equals Flag P_EQ • ON when the shift result is 0.
• OFF in all other cases.
Carry Flag P_CY • ON when 1 is shifted into the Carry Flag (CY).
• OFF in all other cases.
Negative Flag P_N OFF
ASR(026) shifts the contents of Wd
one bit to the right (from leftmost bit to
rightmost bit). “0” will be placed in the
leftmost bit and the contents of the
rightmost bit will be shifted into the
Carry Flag (CY).
When CIO 0.00 is ON, word CIO 100 will
shift one bit to the right. “0” will be placed in
CIO 100.15 and the contents of CIO 100.00
will be shifted to the Carry Flag (CY).
Wd: Word
ASR(026)
Wd
0
0
15
CY
ASR
100
0.00
Wd
015
1 0 0 1 0 0 0 1 0 0 0 1 0 0 0 1
0
CY
01
Wd: 100CH
1 0 0 1 0 0 0 1 0 0 0 1 0 0 0