Omron CP1E CPU UNIT SOFTWARE - A-1-8 Increment;Decrement Instructions

A-17
Appendices
CP1E CPU Unit Software User’s Manual(W480)
A-1 Instruction Functions
App
A-1-8 Increment/Decrement Instructions
SHIFT N-BITS
RIGHT
NASR @ Shifts the specified 16 bits(NASR) or 32 bits(NSRL) of word data
to the right by the specified number of bits.
C: Control word
• NASR
• NSRL
DOUBLE
SHIFT N-BITS
RIGHT
NSRL @
A-1-8 Increment/Decrement Instructions
Instruction Mnemonic Variations Symbol/Operand Function
INCREMENT
BINARY
++ @ Increments the 4-digit hexadecimal content of the specified word
by 1.
DOUBLE
INCREMENT
BINARY
++L @ Increments the 8-digit hexadecimal content of the specified words
by 1.
DECREMENT
BINARY
− − @ Decrements the 4-digit hexadecimal content of the specified word
by 1.
DOUBLE DEC-
REMENT
BINARY
− −L @ Decrements the 8-digit hexadecimal content of the specified
words by 1.
INCREMENT
BCD
++B @ Increments the 4-digit BCD content of the specified word by 1.
Instruction Mnemonic Variations Symbol/Operand Function
NASR(581)
D
C
D: Shift word
C: Control word
Lost
N bits
Contents of
"a" or "0"
shifted in
15 8 011 712
C
0
No. of bits to shift: 00 to 10 Hex
Always 0.
Data shifted into register
0 Hex: 0 shifted in
8 Hex: Contents of rightmost bit shifted in
15 8 011 712
C
0
No. of bits to shift: 00 to 20 Hex
Always 0.
Data shifted into register
0 Hex: 0 shifted in
8 Hex: Contents of rightmost bit shifted in
NSRL(583)
D
C
D: Shift word
C: Control word
++(590)
Wd
Wd: Word
Wd Wd
++L(591)
Wd
Wd: Word
Wd+1 Wd Wd+1 Wd
− − (592)
Wd
Wd: Word
Wd Wd
− − L(593)
Wd
Wd: 1st word
Wd+1 Wd Wd+1 Wd
++B(594)
Wd
Wd: Word
Wd Wd