Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!ukc!axion!rtf.bt.co.uk!grundy
From: grundy@rtf.bt.co.uk (Martin Grundy)
Newsgroups: comp.os.minix
Subject: c386 - problem with NOFLOAT
Message-ID: <1991May3.133443.23618@rtf.bt.co.uk>
Date: 3 May 91 13:34:43 GMT
Organization: BT Customer Systems, Brighton, UK
Lines: 57

Hi all...

I have recently upgraded to Minix-386 (thanks Bruce :-) with no problems
and thought I would try CvWs c386, which I have grabbed of the net when
it was posted back in January, together with Patches 1 and 2.

My access to news is via a Sequent S27, and anything I save, I keep there
as its backed up. I also uudecode/uncompress it on this machine.

I have successfully patched and compiled c386 on the Sequent with two
exceptions.

1.  In gen386.c. At PL1, the statement:-

	      ap2=&ecx_reg;

     occurs at line 838 in function g_asdiv().  The Sequent's C compiler,
     (which is BSD I believe) gives a warning that an "old style
     assignment" has been used and that it has assumed a "&=" was meant.
     Given that ap2 is of type "struct amode *", I assume that the
     statement should read:-

	      ap2 = &ecx_reg;

     This problem may not occur on Minix ACK, bcc or Gnu-C :-)

2.   Having transferred the sources to my Minix-386 box, I tried to
     compile c386 under bcc. The first thing was bcc objected as it has
     no floating point, (or perhaps it is the lack of a 387 ?).
     I patched the Makefile to include -DNOFLOAT.

     Then, on line 1688 of gen386.c (PL1)

        gendouble(node->v.f);

     bcc said that "f" was undefined.  Looking at the definition of struct
     enode in expr.h, I found this:-

	    union {
		long            i;
	#ifndef NOFLOAT
		double          f;
	#endif
		char           *sp;
		struct enode   *p[2];
	    }               v;

     ie. with NOFLOAT defined, double f; is missing.

     Has any one else found this problem ?

--------------------------------------------------------------------
Martin Grundy                     |  email: grundy@rtf.bt.co.uk
British Telecom Customer Systems  |
Hyperion House                    |  phone: +44 273 762102
96-99 Queens Road                 |  fax:   +44 273 722038 or
Brighton BN1 3XF.                 |         +44 273 762071 (netfax)