ACPI_MASK_BITS_ABOVE
Mask &= ACPI_MASK_BITS_ABOVE (BufferTailBits);
MergedDatum &= ACPI_MASK_BITS_ABOVE (BufferTailBits);
#define ACPI_MASK_BITS_ABOVE_32(width) ((UINT32) ACPI_MASK_BITS_ABOVE(width))
ACPI_MASK_BITS_ABOVE(width))