Intel and compatable CPU's Programming Information
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Intel Itanium 64 Bit processor
Intel 80386 Reference Programmer's Manual
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NOP -- No Operation
Opcode Instruction Clocks Description 90 NOP 3 No operation
Description
NOP performs no operation. NOP is a one-byte instruction that takes up space but affects none of the machine context except (E)IP.NOP is an alias mnemonic for the XCHG (E)AX, (E)AX instruction.
Flags Affected
NoneProtected Mode Exceptions
NoneReal Address Mode Exceptions
NoneVirtual 8086 Mode Exceptions
None
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Chapter 17 -- 80386 Instruction Set
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