Panasonic MN103001G/F01K - Manual (Page 66)

Extension Instruction Specifications
3-10
CLRMAC (Register clear instruction for multiply-and-accumulate operation)
[Instruction Format (Macro Name)]
CLRMAC
[Assembler Mnemonic]
udf22 D0, D0
[Operation]
This instruction clears the contents of the multiply-and-accumulate registers MCRH and MCRL.
This instruction also clears the contents of the multiply-and-accumulate overflow detect register MCVF.
[Flag Changes]
Flag Change Condition
V –
C –
N –
Z –
[Programming Cautions]
When "udf22 Dm, Dn" is operated, Dm and Dn are ignored.