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Instruction Functions Section 2-2
2-2-8 Increment/Decrement Instructions
Instruction
Mnemonic
Code
Symbol/Operand Function Location
Execution
condition
Page
INCREMENT
BINARY
++
@++
590
Output
Required
409
DOUBLE INCRE-
MENT BINARY
++L
@++L
591
Output
Required
411
DECREMENT
BINARY
– –
@– –
592
Output
Required
413
DOUBLE DEC-
REMENT
BINARY
– –L
@– –L
593
Output
Required
415
INCREMENT
BCD
++B
@++B
594
Output
Required
417
DOUBLE INCRE-
MENT BCD
++BL
@++BL
595
Output
Required
419
DECREMENT
BCD
– –B
@– –B
596
Output
Required
421
DOUBLE DEC-
REMENT BCD
– –BL
@– –BL
597
Output
Required
423
++(590)
Wd
Wd: Word
Increments the 4-digit hexadecimal content of the specified word by 1.
Wd Wd
++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: Word
Wd
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.