99
Increment/Decrement Instructions
Section 3-8
3-8 Increment/Decrement Instructions
Instruction
Mnemonic
Code
Symbol/Operand Function Location
Execution condition
INCREMENT
BINARY
++
@++
590
Output
Required
DOUBLE INCRE-
MENT BINARY
++L
@++L
591
Output
Required
DECREMENT
BINARY
– –
@– –
592
Output
Required
DOUBLE DEC-
REMENT
BINARY
– –L
@– –L
593
Output
Required
INCREMENT
BCD
++B
@++B
594
Output
Required
DOUBLE INCRE-
MENT BCD
++BL
@++BL
595
Output
Required
DECREMENT
BCD
– –B
@– –B
596
Output
Required
DOUBLE DEC-
REMENT BCD
– –BL
@– –BL
597
Output
Required
++(590)
Wd
Wd: Word
Wd Wd
Increments the 4-digit hexadecimal content of the specified word by 1.
++L(591)
Wd
Wd: Word
Wd+1 Wd Wd+1 Wd
Increments the 8-digit hexadecimal content of the specified words by
1.
− − (592)
Wd
Wd: Word
Wd Wd
Decrements the 4-digit hexadecimal content of the specified word by
1.
− − L(593)
Wd
Wd: 1st word
Wd+1 Wd Wd+1 Wd
Decrements the 8-digit hexadecimal content of the specified words by
1.
++B(594)
Wd
Wd: Word
Wd Wd
Increments the 4-digit BCD content of the specified word by 1.
++BL(595)
Wd
Wd: 1st word
Wd+1 Wd Wd+1 Wd
Increments the 8-digit BCD content of the specified words by 1.
− − B(596)
Wd
Wd: Word
−1
Wd Wd
Decrements the 4-digit BCD content of the specified word by 1.
− − BL(597)
Wd
Wd: 1st word
Wd+1 Wd Wd+1 Wd
Decrements the 8-digit BCD content of the specified words by 1.