WRFSBASE

RDWRFSGS RDWRFSGS x86_64

2 encoding forms.

X86_WRFSBASE_X86_LEGACY_0F_AE_464543
ry
X86_LEGACY AE /2 FSGSBASE
XED_WRFSBASE_X86_LEGACY_0F_AE_346284
REG0=GPRy_B():r REG1=XED_REG_FSBASE:w:SUPP:y
X86_LEGACY AE /2 RDWRFSGS