Panasonic MN103001G/F01K User Manual
Page 80
Extension Instruction Specifications
3-24
[Flag Changes]
When multiply-and-accumulate operation overflow was not detected (MCVF = 0)
Flag
Change
Condition
V
0
Indicates that the multiply-and-accumulate operation is valid.
C
0
Always 0
N
*
Undefined
Z
*
Undefined
When multiply-and-accumulate operation overflow was detected (MCVF = 1)
Flag
Change
Condition
V
1
Indicates that the multiply-and-accumulate operation is invalid.
C
0
Always 0
N
*
Undefined
Z
*
Undefined
[Programming Cautions]
There is a one-instruction delay in the updating of the PSW to reflect flag changes.
However, the Bcc and Lcc instructions can evaluate the flags without waiting for the flag changes to be reflected in
the PSW.
The operations of "udf02 imm16, Dn" and "udf02 imm32, Dn" are not assured. In addition, a system error interrupt
does not occur in these cases.