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Code Mnemonic Description
F6 /2 NOT r/m8 Reverse each bit of r/m8
F7 /2 NOT r/m16 Reverse each bit of r/m16
F7 /2 NOT r/m32 Reverse each bit of r/m32

Description
Performs a bitwise NOT operation (each 1 is cleared to 0, and each 0 is set to 1) on the destination operand and stores the result in the destination operand location. The destination operand can be a register or a memory location.
Operands Bytes Clocks
reg 2 1 NP
mem 2 + d(0 - 2) 3 NP

Flags
ID unaffected DF unaffected
VIP unaffected IF unaffected
VIF unaffected TF unaffected
AC unaffected SF unaffected
VM unaffected ZF unaffected
RF unaffected AF unaffected
NT unaffected PF unaffected
IOPL unaffected CF unaffected
OF unaffected