Panasonic MN103001G/F01K - Manual (Page 61)

Extension Instruction Specifications
3-5
3.2.3 Extension Instruction Details
PUTX (Register transfer instruction for high-speed multiplication: Load)
[Instruction Format (Macro Name)]
PUTX Dm
[Assembler Mnemonic]
udf20 Dm, Dm
[Operation]
The contents of Dm are transferred to the high-speed multiply register MDRQ.
[Flag Changes]
Flag Change Condition
V –
C –
N –
Z –
[Programming Cautions]
When "udf20 Dm, Dn" is operated, Dn is ignored.