Overflow And Underflow - Panasonic FP7 Series Command Reference Manual

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2.10 Overflow and Underflow

What are overflow and underflow?

● A value resulting from operation instruction sometimes fails to satisfy the range that can be

● When a value is larger than the maximum value it is called "overflow" and when a value is

lower than the minimum value it is called "underflow".

Overflow and underflow in binary operations

● If numerical values go beyond the range shown below, those values become overflow or

<16-bit operation>

<32-bit operation>

Values for overflow and underflow

● As shown in the figures, the numerical values that can be handled by an operation are in a

loop status, in which the maximum value and minimum value are connected.

WUME-FP7CPUPGR-12

(Higher than the maximum value is overflow)

(Lower than the minimum value is underflow)

(Higher than the maximum value is overflow)

(Lower than the minimum value is underflow)

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