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Re: s390: larl for Simode on 64-bit

From: Jeff Law <law at redhat dot com>
To: DJ Delorie <dj at redhat dot com>, gcc at gcc dot gnu dot org
Date: Wed, 08 Jul 2015 14:53:17 -0600
Subject: Re: s390: larl for Simode on 64-bit
Authentication-results: sourceware.org; auth=none
References: <201507082033 dot t68KXrdI028695 at greed dot delorie dot com>

On 07/08/2015 02:33 PM, DJ Delorie wrote:

Is there any reason that LARL can't be used to load a 32-bit symbolic
value, in 64-bit mode?  On TPF (64-bit) the app has the option of
being loaded in the first 4Gb so that all symbols are also valid
32-bit addresses, for backward compatibility.  (and if not, the linker
would complain)

It would seem that we'd want the compiler to know when the app is goingto be loaded into that first 4G so that it can use the more efficientaddressing modes.

Jeff

Follow-Ups:
- Re: s390: larl for Simode on 64-bit
  - From: DJ Delorie

References:
- s390: larl for Simode on 64-bit
  - From: DJ Delorie

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