Establishing a code base reg (was: SAVE/RETURN macros in AMODE 64)

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#358

From: Bob Raicer
Date: Mon, 19 Sep 2005 14:24

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  :  Date:    Fri, 16 Sep 2005 13:41:17 -0600
  :  From:    Steve Comstock <steve@trainersfriend.com>
  :  Subject: Re: SAVE/RETURN macros in AMODE 64
  :
  :  Wait.
  :
  :  1. Why are you using BALR / USING? When you
  :      are entered in in AMOD64, you _must_
  :      user LARL to get your base address
  :

Why do you believe your assertion that one must use LARL to
estabish a base register is true?

The following instruction sequences will produce the same result
when executing in 64-bit addressing mode, namely, GPR 12 will
contain the pure 64-bit address of the label NSI.

  Case 1:
           BASR  12,0
     NSI   DC    0H'0'


  Case 2:
           BALR  12,0
     NSI   DC    0H'0'


  Case 3:
           LARL  12,NSI
     NSI   DC    0H'0'


Bob Raicer

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From: Bob Raicer <RJR@raicer.com>
Newsgroups: bit.listserv.asm370
Subject: Establishing a code base reg (was: SAVE/RETURN macros in AMODE 64)
Date: Mon, 19 Sep 2005 08:24:54 -0600
Organization: SAS Inc.
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