Bit Manipulations

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Mnemonic	Description	Cycles
sbr	set bit(s) in register	1
cbr	clear bit(s) in register	1
ser	set register	1
clr	clear register	1
swap	swap nibbles	1

::sbr

Second argument selects bits that will be one.

ldi   r16, 0b01000000
sbr   r16, 0b00001111
; r16 :>   0b01001111

It is identical with ori. Assembler will generate the exact same machine code.

::cbr

Second argument selects bits that will be zero.

ldi   r16, 0b01001111
sbr   r16, 0b00001111
; r16 :>   0b01000000

It is almost identical with andi. But not the same !!!

⚠️ REMINDER
Even though they don't have the word immediate in the name, sbr and cbr only work on registers 16 through 31.

::ser

Sets register's all bits on. Only work with r16 : r31

::clr

Sets register's all bit off. Only work with r16 : r31

⚠️ REMINDER
ser and clr are not actual instructions implemented in the architecture, but are provided by the assembler as aliases for other instructions.

::swap

Allows us to swap the lower 4 Bits with the upper 4 Bits of a register.

ldi   r16, 0x0F
swap  r16
; r16 :> 0xF0

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