Using Arithmetic and Logic › Setting and Manipulating Accumulators › Decrement an Accumulator

Decrement an Accumulator

To decrement an accumulator, use the SUB command. The format for a SUB statement is:

SUB accumulator,value

where accumulator is one of ACL/E's accumulators and value is the numeric value to be subtracted from the variable. For example, the following statement decrements the accumulator A3 by 5:

SUB A3,5

You can also decrement an accumulator by the value of another accumulator. For example, the following statement decrements A3 by the value of A2:

SUB A3,A2

The accumulator that is being decremented must be in the first operand position, so the following statement decrements A2 by the value of A3:

SUB A2,A3