bndcu

Check Upper Bound

BNDCU b, r/m

Checks if address is within upper bound.

Details

The Check Upper Bound instruction checks if address is within upper bound.

Pseudocode Operation

// Checks if address is within upper bound

Example

BNDCU b, rbx

Encoding

Binary Layout
F2
+0
0F
+1
1A
+2
 
Format Legacy
Opcode F2 0F 1A
Extension MPX

Operands

  • dest
    MPX bounds register (bnd0–bnd3)
  • src
    Register or memory operand