Panasonic FP7 Series Command Reference Manual page 411

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Processing
Example 1) Operation unit: 16 bits (US)
Output bit 3 of the pre-operation data to CY. (Output bit 15 of the post-operation data to CY)
Example 2) Operation unit: 32 bits (UL)
Output bit 7 of the pre-operation data to CY. (Output bit 31 of the post-operation data to CY)
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Flag operations
Name
SR7
SR8
(ER)
SR9
(CY)
WUME-FP7CPUPGR-12
Description
To be set in the case of out-of-range in indirect access (index modification).
(Rotation amount - 1) bits of the pre-operation data are output.
When the operation unit is 16 bits (US), if [n] is either 0 or a multiple of 16, the rotation
amount is regarded as 0, and no change occurs.
When the operation unit is 32 bits (UL), if [n] is either 0 or a multiple of 32, the rotation
amount is regarded as 0, and no change occurs.
8.11 ROR (Right Rotation of Data)
8-23