> The current generation AMD64 MMUs can only handle 64-bit pointers in
> which the high-order 17 bits are all the same (40 bits of information).
I was mulling this over the other day... Say I've got a string class that
looks like this:
class string {
class shortString {
char flag;
char [7] smallString;
};
class {
union {
char *ptr;
shortString;
} shortStringOrPtr;
} data;
};
Is there some magic value I can write into "flag", that in combination with
the understanding of how 64 bit pointers get truncated down to 48 bit
virtual addresses that will allow me to store either a 7 byte string or a
char * in the same space?
Thanks,
Dale
--
Dale E. Martin - [EMAIL PROTECTED]
http://the-martins.org/~dmartin
--
To UNSUBSCRIBE, email to [EMAIL PROTECTED]
with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
