One's Complement Negation (not)

not{bwl}	 	r/m[8|16|32]

Operation

not r/m[8|16|32] -> r/m[8|16|32]

Description

Inverts each bit value of the byte, word, or long; that is, every 1 becomes a 0 and every 0 becomes a 1.

Example

Invert each of the 8-bit values at the effective address (addressed by the ESI register plus an offset of 1):

notb 1(%esi)

Invert each of the 16-bit values at the effective address (addressed by the EDI register plus an offset of 4):

notw 4(%edi)

Invert each of the 32-bit values at the effective address (addressed by the EDI register plus an offset of 4):

notl 4(%edi)