Panasonic MN103001G/F01K - Manual (Page 63)

Extension Instruction Specifications
3-7
GETX (Register transfer instruction for high-speed multiplication: Store)
[Instruction Format (Macro Name)]
GETX Dn
[Assembler Mnemonic]
udf15 Dn, Dn
[Operation]
The contents of the high-speed multiply register MDRQ are transferred to Dn.
[Flag Changes]
Flag Change Condition
V 0 Always 0
C 0 Always 0
N + 1 when MSB of the transfer results is 1; 0 in all other cases
Z + 1 when the transfer results are 0; 0 in all other cases
[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.
When "udf15 Dm, Dn" is operated, Dm is ignored.
The operations of "udf15 imm8, Dn", "udf15 imm16, Dn" and "udf15 imm32, Dn" are not assured. In addition, a
system error interrupt does not occur in these cases.