struct _IMAGE_SWITCHTABLE_BRANCH_DYNAMIC_RELOCATION// Size=0x2
{
    unsigned short PageRelativeOffset:12;// Offset=0x0 Size=0x2 BitOffset=0x0 BitSize=0xc
    unsigned short RegisterNumber:4;// Offset=0x0 Size=0x2 BitOffset=0xc BitSize=0x4
};