tzmsk

Mask From Trailing Zeros

TZMSK r32, r/m32

Creates mask from trailing zeros (~x & (x-1)).

Details

The Mask From Trailing Zeros instruction creates mask from trailing zeros (~x & (x-1)).

Pseudocode Operation

// Creates mask from trailing zeros (~x & (x-1))

Example

TZMSK eax, ebx

Encoding

Binary Layout
VEX
+0
opcode
+3
ModRM
+4
 
Format TBM
Opcode 8F ... 04
Extension TBM

Operands

  • dest
    32-bit general-purpose register (e.g. EAX)
  • src
    32-bit register or memory