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From: inst182@tuvie (Inst.f.Techn.Informatik)
Newsgroups: gnu.gcc
Subject: short jumps
Keywords: port
Message-ID: <1049@tuvie>
Date: 2 Feb 90 11:55:27 GMT
Organization: TU Vienna EDP-Center, Vienna, AUSTRIA
Lines: 19


I want to make a port of gcc to a new processor that has short relative
jumps for up to +-128 instructions. Now my problem is the following:

This jump has completely different semantics than a far jump. How can I
check if I can use the short jump instead of a far jump. I cannot delay
the decision till assembly time, so I *MUST* have gcc emit the right 
instruction. *ANY* hints will be appreciated.


					thanx in advance,
						mike

       ____  ____
      /   / / / /   Michael K. Gschwind             mike@vlsivie.at
     /   / / / /    Institute for VLSI-Design       mike@vlsivie.uucp
     ---/           Technical University, Vienna 
       / 
   ___/