xor
EXEC_INSTR(8, xor)
EXEC_INSTR(16, xor)
EXEC_INSTR(32, xor)
EXEC_INSTR(64, xor)
EXEC_DISPATCHER(xor)
hammer_off_t xor = 0;
xor = hammer_xlate_to_undo(ondisk, buf_offset) ^
xor = HAMMER_OFF_LONG_ENCODE(buf_offset) ^
if (isnew > 0 || (xor & ~HAMMER_BUFMASK64)) {
int xor = 0;
xor = 1;
setkey.dk_xor = xor;