opcode extension field

opcode extension field
поле расширения кода команды
в ЦП со сложным набором команд (например, Itanium) - поле, располагающееся за пределами поля кода операции (operation code), но также определяющее вид выполняемой процессором команды
см. тж. CISC

Англо-русский толковый словарь терминов и сокращений по ВТ, Интернету и программированию. . 1998-2007.

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