xsave

Documentation

Overview

THESE PACKAGES ARE FOR DEMONSTRATION PURPOSES ONLY!

THEY DO NOT NOT CONTAIN WORKING INTRINSICS!

See https://github.com/klauspost/intrinsics

Index

• func Xgetbv(a uint32) uint64
• func Xsetbv(a uint32, val uint64)

Functions

func Xgetbv

func Xgetbv(a uint32) uint64

Xgetbv: Copy up to 64-bits from the value of the extended control register (XCR) specified by 'a' into 'dst'. Currently only XFEATURE_ENABLED_MASK XCR is supported.

dst[63:0] := XCR[a]

Instruction: 'XGETBV'. Intrinsic: '_xgetbv'. Requires XSAVE.

func Xsetbv

func Xsetbv(a uint32, val uint64)

Xsetbv: Copy 64-bits from 'val' to the extended control register (XCR) specified by 'a'. Currently only XFEATURE_ENABLED_MASK XCR is supported.

XCR[a] := val[63:0]

Instruction: 'XSETBV'. Intrinsic: '_xsetbv'. Requires XSAVE.