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NOT -- One's Complement Negation

Opcode    Instruction   Clocks    Description

F6   /2   NOT r/m8       2/6      Reverse each bit of r/m byte
F7   /2   NOT r/m16      2/6      Reverse each bit of r/m word
F7   /2   NOT r/m32      2/6      Reverse each bit of r/m dword

Operation

r/m := NOT r/m;

Description

NOT inverts the operand; every 1 becomes a 0, and vice versa.

Flags Affected

None

Protected Mode Exceptions

#GP(0) if the result is in a nonwritable segment; #GP(0) for an illegal memory operand effective address in the CS, DS, ES, FS, or GS segments; #SS(0) for an illegal address in the SS segment; #PF(fault-code) for a page fault

Real Address Mode Exceptions

Interrupt 13 if any part of the operand would lie outside of the effective address space from 0 to 0FFFFH

Virtual 8086 Mode Exceptions

Same exceptions as in real-address mode; #PF(fault-code) for a page fault

up: Chapter 17 -- 80386 Instruction Set
prev: NOP No Operation
next: OR Logical Inclusive OR