wrfsbase

Write FS Base

WRFSBASE r64

Writes a register to the FS base address.

Details

The Write FS Base instruction writes a register to the FS base address.

Pseudocode Operation

// Writes a register to the FS base address

Example

WRFSBASE rax

Encoding

Binary Layout
F3
+0
0F
+1
AE
+2
ModRM
+3
 
Format Legacy
Opcode F3 0F AE /2
Extension FSGSBASE

Operands

  • dest
    64-bit general-purpose register (e.g. RAX)