RE: [Gcl-devel] RE: GCL bugs (decode-float, rationalize, expt)

[Mike Thomas]

Hi Camm.

I've added an argument to configure (--enable-just486, on by default for
MinGW32) which switches the build including gmp3 and the lisp compiler to
use an i486 processor model or otherwise.

A new MinGW32 should shortly appear on the FTP site.

Cheers

Mike Thomas


| -----Original Message-----
| From: address@hidden
| [mailto:address@hidden
| Behalf Of Camm Maguire
| Sent: Monday, January 13, 2003 12:49 PM
| To: Mike Thomas
| Cc: address@hidden; address@hidden; address@hidden;
| address@hidden; address@hidden; address@hidden
| Subject: Re: [Gcl-devel] RE: GCL bugs (decode-float, rationalize, expt)
|
|
| Greetings!  Just to followup on this, the only time one can get a GMP
| illegal instruction crash is if
|
| 1) They don't configure with --enable-dynsysgmp
| 2) they compile on a box with one set of ISA extensions (e.g. 3dnow,
|    SSE, ...)
| 3) they run on a box which doesn't support the ISA extensions
| supported by the compiling box.
|
| Both the solaris and x86 Linux packages I'm making under the CVS
| directory either use dynsysgmp, or configure gmp3 explicitly for the
| lowest denominator, e.g. by preceding the main configure and build
| with 'cd gmp3 && ./configure --build=i486-unknown-linux-gnu && cd ..'
| I would encourage the mingw developers of binary GCL snapshots to do
| the same if compiling in GMP.
|
| You can tell if this is the problem with a little objdump.  E.g.
|
| objdump -d saved_gcl |grep xmm     (tests for SSE intructions)
| objdump -d saved_gcl |grep pfadd,
| objdump -d saved_gcl |grep pfmul   (tests for 3dNow/Athlon intructions)
|
| Take care,
|
|
| "Mike Thomas" <address@hidden> writes:
|
| > Hi Stavros, Camm.
| >
| > > Mike, can you confirm/comment on the mingw crashes?
| >
| > I get no crashes and as the comparison below shows, my results
| echo Camm's
| > exactly whether incorrect or not.  I assume Camm's were
| obtained from x86
| > Linux.
| >
| > I suppose that at the bottom of all these problems is GMP - the crashes
| > probably depend on the CPU for which it was built as compared
| to the CPU on
| > which it is running or else the version of GMP used.
| >
| > The current GCL uses a lowest common denominator CPU on x86
| platforms and (I
| > believe) a newer version of GMP compared to GCL 2.3.6 which is
| probably why
| > it is not crashing.
| >
| > The questions which come to my mind are:
| >
| > Is your GCL self built?
| >   Me: yes - from CVS.  I don't have 2.3.6 at hand.
| >
| > If yes, which gcc compiler are you using?
| >   Me: MinGW32 gcc version 3.2.1
| >
| > If no, what is the date of your binary build?
| >
| > What CPU have you got?
| >   Me: P4
| >
| > What OS?
| >   Me: XP
| >
| > I suggest you try the new binary build of Windows GCL and see
| what happens.
| >
| > Cheers
| >
| > Mike Thomas.
| >
| > -------------------------------------------------------------
| > REPORT
| > > (rationalize 1.0e-300) => Illegal Instruction (CRASH)
| >
| > MIKE
| > GCL (GNU Common Lisp)  Version(2.5.0) Mon Dec 30 13:56:10 EAST 2002
| > Licensed under GNU Library General Public License
| > Contains Enhancements by W. Schelter
| >
| > Use (help) to get some basic information on how to use GCL.
| >
| > >(rationalize 1.0e-300)
| >
| >
| 6032057205060441/6032057205060440848842124543157735677050252251748
| 5057817966
| > 1506
| >
| 496162234449372729337097357813826574370822542501440083716481354049
| 9979063179
| > 1059
| >
| 195977669510221933550917078960348506840390590791803967883491060955
| 8429008744
| > 6076
| >
| 413771468940477241550670753145517602931224392424029547429993824129
| 8892351581
| > 4561
| > 4364972941312
| >
| > CAMM
| > intech19:/fix/t2/camm/b/gcl$ gcl
| > GCL (GNU Common Lisp)  Version(2.5.0) Thu Dec  5 08:07:35 EST 2002
| > Licensed under GNU Library General Public License
| > Contains Enhancements by W. Schelter
| >
| > >(rationalize 1.0e-300)
| >
| >
| 6032057205060441/6032057205060440848842124543157735677050252251748
| 5057817966
| >
| 150649616223444937272933709735781382657437082254250144008371648135
| 4049997906
| >
| 317910591959776695102219335509170789603485068403905907918039678834
| 9106095584
| >
| 290087446076413771468940477241550670753145517602931224392424029547
| 4299938241
| > 29889235158145614364972941312
| >
| > -------------------------------------------------------------
| > REPORT
| > >   (float (rationalize 1.0e-320)) =>
| > >      1.1125369292541007E-308
| >
| > MIKE
| > >(float (rationalize 1.0e-320))
| >
| > 0.0
| >
| > CAMM
| > >(float (rationalize 1.0e-320))
| >
| > 0.0
| >
| > -------------------------------------------------------------
| > REPORT
| > >  (expt 10.0 -310) => 0.0 on both 2.3.6 and 2.5.0
| > >     1.0e-310 is a perfectly good number....
| >
| > MIKE
| > >(expt 10.0 -310)
| >
| > 0.0
| >
| > CAMM
| > >(expt 10.0 -310)
| >
| > 0.0
| >
| > -------------------------------------------------------------
| > REPORT
| > >  (expt 10 -300) => Illegal Instruction (CRASH)
| >
| > MIKE
| > >(expt 10 -300)
| >
| >
| 1/1000000000000000000000000000000000000000000000000000000000000000
| 0000000000
| > 0000
| >
| 000000000000000000000000000000000000000000000000000000000000000000
| 0000000000
| > 0000
| >
| 000000000000000000000000000000000000000000000000000000000000000000
| 0000000000
| > 0000
| > 000000000000000000000000000000000000000000000000000000000000000
| >
| > CAMM
| > >(expt 10 -300)
| >
| >
| 1/1000000000000000000000000000000000000000000000000000000000000000
| 0000000000
| >
| 000000000000000000000000000000000000000000000000000000000000000000
| 0000000000
| >
| 000000000000000000000000000000000000000000000000000000000000000000
| 0000000000
| >
| 000000000000000000000000000000000000000000000000000000000000000000
| 000000000
| >
| > -------------------------------------------------------------
| > REPORT
| >   (decode-float 1.0e-300) => 0.72, -1022, 1.0
| >
| > MIKE
| > >(decode-float 1.0e-300)
| >
| > 0.66969287949141709
| > -996
| > 1.0
| >
| > CAMM
| > >(decode-float 1.0e-300)
| >
| > 0.66969287949141709
| > -996
| > 1.0
| >
| > -------------------------------------------------------------
| > REPORT
| >   (decode-float 1.0e-320) => 0.50, -1022, 1.0
| >
| > MIKE
| > >(decode-float 1.0e-320)
| >
| > 0.50000000000022471
| > -1022
| > 1.0
| >
| > CAMM
| > >(decode-float 1.0e-320)
| >
| > 0.50000000000022471
| > -1022
| > 1.0
| >
| > -------------------------------------------------------------
| > REPORT
| > >  (integer-decode-float 1.0) =>
| >      Illegal Instruction (CRASH)
| >
| > MIKE
| > >(integer-decode-float 1.0)
| >
| > 4503599627370496
| > -52
| > 1
| >
| > CAMM
| > >(integer-decode-float 1.0)
| >
| > 4503599627370496
| > -52
| > 1
| >
| >
| >
| >
| >
| > _______________________________________________
| > Gcl-devel mailing list
| > address@hidden
| > http://mail.gnu.org/mailman/listinfo/gcl-devel
| >
| >
|
| --
| Camm Maguire                                          address@hidden
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