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Category
Instruction
Symbol
symbol
BCD 4-digit
B+
B+
addition and
subtraction
B+P
B+P
operations
B+
B+
B+P
B+P
B-
B
B-P
B
B-
B
B-P
B
BCD 8-digit
DB+
DB+
addition and
subtraction
DB+P
DB+P
operations
DB+
DB+
DB+P
DB+P
DB-
DB
DB-P
DB
DB-
DB
DB-P
DB
BCD 4-digit
B*
B
multiplication
and division
B*P
B
operations
B/
B/
B/P
B/P
BCD 8-digit
DB*
DB
multiplication
and division
DB*P
DB
operations
DB/
DB/
DB/P
DB/P
Processing details
• (D)+(S)(D)
S
D
S D
• (S1)+(S2)(D)
S1 S2 D
S1 S2 D
• (D)-(S)(D)
S
D
P
S
D
• (S1)-(S2)(D)
S1 S2 D
P
S1 S2 D
• (D+1, D)+(S+1, S)(D+1, D)
S D
S D
• (S1+1, S1)+(S2+1, S2)(D+1,
S1 S2 D
D)
S1 S2 D
• (D+1, D)-(S+1, S)(D+1, D)
S D
P
S D
• (S1+1, S1)-(S2+1, S2)(D+1,
S1 S2 D
D)
P
S1 S2 D
• (S1)(S2)(D+1, D)
S1 S2 D
P
S1 S2 D
• (S1)(S2)Quotient(D),
S1 S2 D
Remainder (D+1)
S1 S2 D
• (S1+1, S1)(S2+1, S2)(D+3,
S1 S2 D
D+2, D+1, D)
P
S1 S2 D
• (S1+1, S1)(S2+1,
S1 S2 D
S2)Quotient (D+1, D),
Remainder (D+3, D+2)
S1 S2 D
Execution
Number
Subset Reference
condition
of basic
steps
3
●
4
3
●
4
3
4
3
4
4
●
●
4
4
4
●
2 INSTRUCTION TABLES
2.4 Basic Instructions
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2
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