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Path: utzoo!utgpu!water!watmath!clyde!motown!mergvax!inthap!polyof!john
From: john@polyof.UUCP
Newsgroups: comp.unix.questions
Subject: Re: Problem with BSD Pascal on a Gould
Message-ID: <236@polyof.UUCP>
Date: Thu, 7-May-87 17:35:47 EDT
Article-I.D.: polyof.236
Posted: Thu May  7 17:35:47 1987
Date-Received: Sat, 9-May-87 06:38:24 EDT
References: <6849@brl-adm.ARPA>
Organization: Polytechnic Inst. of NY, Farmingdale NY
Lines: 35
Summary: Pascal problem, solved?

In article <6849@brl-adm.ARPA>, KFL@AI.AI.MIT.EDU (Keith F. Lynch) writes:
> I recently started using the BSD pascal compiler on a Gould.  It
> compiled several short programs with no problem.  When I attempted
> to compile a 4000 line program (with the line "pc -w foo.p" and with
> ...
> "/tmp/p0005401", line 12522: emit_rmem: offset too large or negative - 0x10810
> "/tmp/p0005401", line 12535: emit_rmem: offset too large or negative - 0x10810
> "/tmp/p0005401", line 12536: emit_rmem: offset too large or negative - 0x107e0
> "/tmp/p0005401", line 12546: emit_rmem: offset too large or negative - 0x10810
> 

Well, being that I ported the BSD pascal compiler to the Gould Concept
machines, for Gould, perhaps I can shed some light on the problem.

The error you describe is from the assembler I believe.  Sounds like you
are trying to pass a big array to a subroutine/function by value. (IE
no "var").  When you do this, the compiler generates "movw	blah, b2[offs]"
instructions for EACH element of the array you are passing.  If you
pass in excess of 32K, offs get's too big to work off a single base register,
and the assembler will bitch.  The bottom line is: you can't pass
things > ~30K on the stack in pascal (any language for that matter) on
a gould, since it limits the immediate offseting of any base register to
64K. (32k in each direction).

Solution: try making the array reference call by reference, not value.
(Use 'var' in in the subroutine declaration for the parameter.)

If this is not your problem, then it is likely that the folks at Gould
munged 'pc' somewhere else.

John Buck
Polytechnic Univ.
Route 110
Farmingdale, NY 11735
polyof!john