Opcode

In computing, an opcode^[1]^[2] (abbreviated from operation code,^[1] also known as instruction machine code,^[3] instruction code,^[4] instruction syllable,^[5]^[6]^[7]^[8] instruction parcel or opstring^[9]^[2]) is the portion of a machine language instruction that specifies the operation to be performed. Beside the opcode itself, most instructions also specify the data they will process, in the form of operands. In addition to opcodes used in the instruction set architectures of various CPUs, which are hardware devices, they can also be used in abstract computing machines as part of their byte code specifications.

^ ^a ^b Cite error: The named reference Barron_1978_Opcode was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Chiba_2007 was invoked but never defined (see the help page).
^ Cite error: The named reference Intel_1973_MCS-4 was invoked but never defined (see the help page).
^ Cite error: The named reference Intel_1974_MCS-40 was invoked but never defined (see the help page).
^ Cite error: The named reference Jones_1988_CISC was invoked but never defined (see the help page).
^ Cite error: The named reference Domagała_2012 was invoked but never defined (see the help page).
^ Cite error: The named reference Smotherman_2013 was invoked but never defined (see the help page).
^ Cite error: The named reference Jones_2016_CISC was invoked but never defined (see the help page).
^ Cite error: The named reference Schulman_2005 was invoked but never defined (see the help page).

[Barron_1978_Opcode-1] Cite error: The named reference Barron_1978_Opcode was invoked but never defined (see the help page).

[Chiba_2007-2] Cite error: The named reference Chiba_2007 was invoked but never defined (see the help page).

[Intel_1973_MCS-4-3] Cite error: The named reference Intel_1973_MCS-4 was invoked but never defined (see the help page).

[Intel_1974_MCS-40-4] Cite error: The named reference Intel_1974_MCS-40 was invoked but never defined (see the help page).

[Jones_1988_CISC-5] Cite error: The named reference Jones_1988_CISC was invoked but never defined (see the help page).

[Domagała_2012-6] Cite error: The named reference Domagała_2012 was invoked but never defined (see the help page).

[Smotherman_2013-7] Cite error: The named reference Smotherman_2013 was invoked but never defined (see the help page).

[Jones_2016_CISC-8] Cite error: The named reference Jones_2016_CISC was invoked but never defined (see the help page).

[Schulman_2005-9] Cite error: The named reference Schulman_2005 was invoked but never defined (see the help page).

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