Comparison instructions and arithmetic instructions set the condition code to signal the result of the operation. The condition code is set by these instructions as follows:
Comparison Instructions (CLC, CR, C) | ||
---|---|---|
Relation of Operands | Condition | Value of Condition Code |
operand1 == operand2 | equal | 00 (0) |
operand1 < operand2 | low | 01 (1) |
operand1 > operand2 | high | 10 (2) |
Arithmetic Instructions (A, AR, AH, AP, ZAP, S, SR, SH, SP) | ||
Result of Operation | Condition | Value of Condition Code |
0 | zero | 00 (0) |
less than 0 | minus | 01 (1) |
greater than 0 | plus | 10 (2) |
overflow | overflow | 11 (3) |
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