Re: %EOF - more on GOTO

[pytel@xxxxxxxxxx]

This last observation is kind of misleading.
GOTO or DOW - unstructured or structured code gets all compiled to same
processor branch instructions.
Processor does not care if branch instruction was generated from despised GOTO
or from respectable DOW.
Old dispute between using or avoiding GOTOs is all about human readability of
code.

Best regards
    Alexei Pytel



Bob Spinks <rspinks@compuserve.com> on 06/19/99 06:08:59 AM

Please respond to RPG400-L@midrange.com

To:   "INTERNET:RPG400-L@midrange.com" <RPG400-L@midrange.com>
cc:    (bcc: Alexei Pytel/Rochester/IBM)
Subject:  Re: %EOF - more on GOTO





What about n-way(pipeline/scalar) processing using multiple chips(up to 12)
on the 720 box.

Conditional branching(i.e. GOTOs,CABs,etc.) clogs up the pipelines due to
prediction
algorithms which must be used for the branch instructions.

Optimization is achieved when all pipelines are full and an instruction is
completed with each
cycle. This is impossible when branching is used in the pgm.

Information on this subject can be gotten from Soltis' book "Inside The
AS/400".

One last vent, GOTO is synonomous for Spaghetti!

Bob Spinks



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