On 12/9/2010 4:19 AM, Tony Thigpen wrote:
It was my understanding that addresses with bit 31 "on" (xxxxxxxx
xxxxxxxx 1xxxxxxx xxxxxxxx) are considered invalid. This was imposed due
to the convention of using the high-bit of a (32 bit) register as a
flag. So, we can use storage below the 2 GB line or above the 4 GB line,
but not between them.
Secondly, if using IARV64, you will never receive storage that includes
this 'invalid' area.
Not unless you code USE2GTO32G=YES.
--
Edward E Jaffe
Phoenix Software International, Inc
831 Parkview Drive North
El Segundo, CA 90245
310-338-0400 x318
[email protected]
http://www.phoenixsoftware.com/
