Machine code |
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General concepts |
Instructions |
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.
Barron_1978_Opcode
was invoked but never defined (see the help page).Chiba_2007
was invoked but never defined (see the help page).Intel_1973_MCS-4
was invoked but never defined (see the help page).Intel_1974_MCS-40
was invoked but never defined (see the help page).Jones_1988_CISC
was invoked but never defined (see the help page).Domagała_2012
was invoked but never defined (see the help page).Smotherman_2013
was invoked but never defined (see the help page).Jones_2016_CISC
was invoked but never defined (see the help page).Schulman_2005
was invoked but never defined (see the help page).