Phil,
There are a number of ways.
1 - Add a second base register, for example if R12 is your base
register,
LR R11,R12
AHI R11,4096
USING label,R12,R11
2 - Constantly reload your base register (this is the method used by
many compilers) of course if you do this, then you have to ensure that
you populate all literal references before you modify the base register
and change the using.
3 - Rewrite the code to fully separate code and data, and convert using
all relative branching, so you only need a base register for data, not
for code. However, some system macros do require base registers for
code. For more info on this, see Ed Jaffe's excellent SHARE
presentation (session 8160 from Tampa) entitled "Reducing Base Register
Usage, or How to 'Jumpify' Your Code"
Wayne Driscoll
Product Developer
JME Software LLC
NOTE: All opinions are strictly my own.
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Phil Kingston
Sent: Tuesday, July 24, 2007 8:53 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: How to extend addressability over 4095 with USING statements
Hi again,
I'm trying to write a TSO command processor which seems to be getting
addressability issues over 4095 bytes, e.g ASMA034E message.
I know there's a way of extending the addressability, but can't
remember.
Anyone know how to do it?
Ps. The IBM message for ASMA034E is of no use at all... just says extend
addressability????????
Phil
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