I was wondering - how many methods there are to clear an 8-bit register. Strictly speaking:
How many distinguishable asm opcodes can modify in one asm op-code command a nonzero 8-bit register into 0x00 state.
I found 34 commands (ver 1.15), although most of them is not as universal as "clr" - some additional constrains apply. For example we can clear any register with "inc" command if the register has a known at compile time value of 0xFF.
Any comments (error reports, suggestions) are welcome. Please use reference number of a method and mnemonic from the spreadsheet for easier tracking.