private void zeroBlock(Address block) {
// FIXME: efficiency check here!
if (VM.VERIFY_ASSERTIONS)
VM.assertions._assert(
block.toWord().and(Word.fromIntSignExtend(BYTES_IN_BLOCK - 1)).isZero());
VM.memory.zero(block, Extent.fromIntZeroExtend(BYTES_IN_BLOCK));
}
/**
* Return the superpage for a given cell. If the cell is a small cell then this is found by
* masking the cell address to find the containing page. Otherwise the first word of the cell
* contains the address of the page.
*
* @param cell The address of the first word of the cell (exclusive of any sub-class specific
* metadata).
* @return The address of the first word of the superpage containing <code>cell</code>.
*/
@Inline
public static Address getSuperPage(Address cell) {
return cell.toWord().and(PAGE_MASK).toAddress();
}
private static final void assertAligned(Address value) {
assertAligned(value.toWord());
}