wbnoinvd

Write Back and Do Not Invalidate Cache

WBNOINVD

Writes back modified lines but keeps them valid in cache.

Details

The Write Back and Do Not Invalidate Cache instruction writes back modified lines but keeps them valid in cache.

Pseudocode Operation

// Writes back modified lines but keeps them valid in cache

Example

WBNOINVD

Encoding

Binary Layout
F3
+0
0F
+1
09
+2
 
Format Legacy
Opcode F3 0F 09
Extension WBNOINVD

Operands