Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!att!cbnews!cbema!las
From: cbema!las@cbnews.ATT.COM (cbema!las)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Looking for a decent C compiler
Message-ID: <7322@cbnews.ATT.COM>
Date: 9 Jun 89 18:11:13 GMT
References: <1440@bucket.UUCP> <8000050@m.cs.uiuc.edu>
Reply-To: cbema!las@cbnews.ATT.COM (Larry A. Shurr)
Organization: AT&T Bell Laboratories, Columbus, OH (actually an AGS consultant)
Lines: 22

In article <8000050@m.cs.uiuc.edu> brown@m.cs.uiuc.edu writes:
>    In Lattice C, all pointers in large model (L) or large data model (D)
>are managed by function calls which compute segment and offset locations
>whenever a pointer is referenced.  Since this happens for all pointer
>references without regard to the size of the object that they reference,
>performance is low for all pointer operations.  

Yes, this is the default for Lattice' large model - option "-ml" on the lc
command line.  Essentially this is "Huge" model in Turbo C and Microsoft C.
I think Lattice calls these pointers "normalized."  If you use the "-mls"
option, you essentially get the Turbo/Microsoft "Large" model in which 
arithmetic is performed on only the offset and no normalizing is performed.

Similarly, a "-md" gives you the Lattice large data/small code model with 
normalizing and "-mds" gives you the offset arithmetic with no normalizing.

regards, Larry
-- 
Signed: Larry A. Shurr (cbema!las@att.ATT.COM or att!cbema!las)
Clever signature, Wonderful wit, Outdo the others, Be a big hit! - Burma Shave
(With apologies to the real thing.  The above represents my views only.)
(Please note my mailing address.  Mail sent directly to cbnews doesn't make it.)