Intel® C++ Compiler Classic Developer Guide and Reference

ID 767249
Date 12/16/2022
Public

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Intrinsics that Allow Reading from and Writing to the FS Base and GS Base Registers

There are eight intrinsics that allow reading and writing the value of the FS base and GS base registers at all privilege levels and in 64-bit mode only.

These intrinsics are mapped to corresponding 3rd Generation Intel® Core™ Processor extension instructions.