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Chapter 17 -- 80386 Instruction Set
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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