RDFSBASE

RDWRFSGS RDWRFSGS x86_64

2 encoding forms.

X86_RDFSBASE_X86_LEGACY_0F_AE_464543
ry
X86_LEGACY AE /0 FSGSBASE
XED_RDFSBASE_X86_LEGACY_0F_AE_402592
REG0=GPRy_B():w REG1=XED_REG_FSBASE:r:SUPP:y
X86_LEGACY AE /0 RDWRFSGS