Panasonic FP7 Series Command Reference Manual page 325

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Processing
Example 1) When the operation unit is 16-bit (US, SS)
Example 2) When the operation unit is 32-bit (UL, SL, SF)
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Flag operations
Name
SR7
SR8
(ER)
WUME-FP7CPUPGR-12
Description
To be set in the case of out-of-range in indirect access (index modification).
To be set when a non-real number is specified for [D], and the operation unit is a real
number (SF).
6.9 DEC (Decrement)
6-21