RDGSBASE

RDWRFSGS RDWRFSGS x86_64

2 encoding forms.

X86_RDGSBASE_X86_LEGACY_0F_AE_464543
ry
X86_LEGACY AE /1 FSGSBASE
XED_RDGSBASE_X86_LEGACY_0F_AE_778522
REG0=GPRy_B():w REG1=XED_REG_GSBASE:r:SUPP:y
X86_LEGACY AE /1 RDWRFSGS