Intel Corporation
Context save with variable save state size

Abstract:

Embodiments of an apparatus comprising a decoder to decode an instruction having fields for an opcode and a destination operand and execution circuitry to execute the decoded instruction to perform a save of processor state components to an area located at a destination memory address specified by the destination operand, wherein a size of the area is defined by at least one indication of an execution of an instruction operating on a specified group of processor states are described.