[M3devel] some other ports.. (PPC32_OPENBSD, SPARC64_OPENBSD, SPARC64_SOLARIS)

Sat May 15 00:13:58 CEST 2010

So maybe I386_LINUX is ok..but others not..I need to test more/again/more/again/more/again....

  - Jay

----------------------------------------
> From: jay.krell at cornell.edu
> To: hosking at cs.purdue.edu
> CC: m3devel at elegosoft.com
> Subject: RE: [M3devel] some other ports.. (PPC32_OPENBSD, SPARC64_OPENBSD, SPARC64_SOLARIS)
> Date: Fri, 14 May 2010 18:25:59 +0000
>
>
> I should disclose that I also rolled back hand.c, though that is mostly or completely implied, due to mod/div/set.
>
>
> I have some extra time today, so, plan:
>   retest head on I386_LINUX (still crossing from Darwin/x86), verify it is broken, since it is all working now
>   test undo just the bitfield insert/extract change, see if that is the problem
>   work through the others if not
>   Possibly verify mod/div test coverage (unless it is the problem, in which
>   case if I put it back, no need for test coverage, probably nobody will ever
>   touch it again, which is fine. :) )
>  I'm pretty sure I tested the set stuff well because I was very nervous but
>   if others are ruled out I'll undo or test it.
>   (To clarify, I wasn't even sure by close inspection of the correctness of my NT386
>  set changes. Only through experimentation/testing could I know that
>  the definition of bit indices matched up between hand.c and the btc/bts instructions,
>  it appeared to be a very convenient coincidence.)
>
>
> I am surprised that I386_* working and broken.
> I would think wordsize and endian is all that matters here.
>
>
> I do worry that we are only on gcc 4.3.0 and not even 4.3.3.
> But moving up to 4.4.x or 4.5.x is welcome too. :)
>
>
>  - Jay
>
>
> ----------------------------------------
>> From: jay.krell at cornell.edu
>> To: hosking at cs.purdue.edu
>> Date: Fri, 14 May 2010 17:58:29 +0000
>> CC: m3devel at elegosoft.com
>> Subject: Re: [M3devel] some other ports.. (PPC32_OPENBSD, SPARC64_OPENBSD, SPARC64_SOLARIS)
>>
>>
>> I don't think anything I've been fiddling with has been dropped by gcc, yet.
>> I might have depended on Irix o32 to get up to a working gcc, but no matter.
>> I agree if they drop it, we have to.
>> Though we could also keep multiple gcc versions if there was really something we wanted,
>> but that's not likely.
>> A C generating backend also solves this.
>>
>>
>> I think I tested my "set" changes on 32bit, 64bit, little endian, big endian, all four combinations.
>> But I won't guarantee that now and am very willing to undo them if there is a problem.
>> (big endian 64bit would be PPC64_DARWIN, which does have a strong propensity to hang, but also largely works).
>>
>>
>> I don't remember about div/mod.
>> While it seems "obvious" that the change is correct, it could be that that part of
>> gcc is little tested: C and Fortran wouldn't use it. But maybe Ada?
>>
>>
>> I'm also not optimizing at all.
>>
>>
>> I also agree that rolling forward to any newer gcc is welcome. I just don't know how to do it, at least not
>> easily, and I'm also not keen on the huge testing matrix.
>> (I think it's roughly what I did for Apple's gcc 4.2, but it was tedious.)
>>
>>
>> If it is ICEs we are after though, it is fairly easy to do cross builds and test "everything", automated, given the time to build gcc enough times. :)
>> We should really fix the few lingering 32bit/64bit cross bugs, so we can cross build everything.
>>
>>
>> Rolling back parse.c, I think every target I've tested (running cm3 bootstrap and making
>> sure it gets as far as "can't find cm3.cfg") has worked, except PPC32_OPENBSD.
>> This includes PPC_DARWIN, PPC64_DARWIN, I386_LINUX, SPARC64_SOLARIS,
>> SPARC64_OPENBSD. (SPARC64_SOLARIS now probably working).
>>
>>
>> - Jay
>>
>> ----------------------------------------
>>> From: hosking at cs.purdue.edu
>>> Date: Fri, 14 May 2010 09:59:02 -0400
>>> To: jay.krell at cornell.edu
>>> CC: m3devel at elegosoft.com
>>> Subject: Re: [M3devel] some other ports.. (PPC32_OPENBSD, SPARC64_OPENBSD, SPARC64_SOLARIS)
>>>
>>> Argh. I worried about that when I made my changes, but all seemed to be well for bootstraps on Darwin/x86.
>>>
>>> Also, we need to have regular testing of the compiler at both -O1 and -O2 or -O3 optimisation levels. I know of at least one gcc ICE on one platform (I forget which) that manifests only at -O3 compiling just one module in the entire CM3 distribution. This is fragile stuff... and it may just be a bug in gcc that we are exercising.
>>>
>>> It may be that we just need to update the backend to a newer version of gcc. It has been a couple of years, and Jay is pushing the target envelope much further than it ever has been. Problem is that newer gcc may not play nice with older targets. I strongly suggest that we focus effort on modern targets and not older targets, which implies we probably want to roll the gcc-based backend forward to a more current gcc release.
>>>
>>> On 14 May 2010, at 06:27, Jay K wrote:
>>>
>>>>
>>>> ok, bringing parse.c mostly back to what it is in release, has cleared up a lot of this, I haven't nested it all.
>>>> Then I'll have to narrow it down some -- there are two main sets of changes:
>>>> - my changes to set operations
>>>> - my change to div/mod
>>>> - Tony's to bit field operations
>>>>
>>>> It is also conceivable that mixing release/head cm3 with head/release cm3cg 1) doesn't work 2) I was doing it.
>>>>
>>>> I thought I had tested my changes thoroughly but at this point, I don't know, and don't care much
>>>> to keep them if they don't work.
>>>> (Well, hopefully the NT386 versions can stay. :) )
>>>>
>>>> - Jay
>>>>
>>>>
>>>> ----------------------------------------
>>>>> From: jay.krell at cornell.edu
>>>>> To: m3devel at elegosoft.com
>>>>> Date: Fri, 14 May 2010 09:08:58 +0000
>>>>> Subject: Re: [M3devel] some other ports.. (PPC32_OPENBSD, SPARC64_OPENBSD, SPARC64_SOLARIS)
>>>>>
>>>>>
>>>>> Hm. Something is wrong on many platforms, in head, at least with my boot archives.
>>>>> PPC_DARWIN, SOLsun, I386_LINUX
>>>>> I'll figure it out. Hopefully soon.
>>>>>
>>>>> - Jay
>>>>>
>>>>> ----------------------------------------
>>>>>> From: jay.krell at cornell.edu
>>>>>> To: m3devel at elegosoft.com
>>>>>> Date: Fri, 14 May 2010 06:37:07 +0000
>>>>>> Subject: [M3devel] some other ports.. (PPC32_OPENBSD, SPARC64_OPENBSD, SPARC64_SOLARIS)
>>>>>>
>>>>>>
>>>>>> I've tried SPARC64_OPENBSD, SPARC64_SOLARIS, PPC32_OPENBSD recently (this week).
>>>>>>
>>>>>> SPARC64_SOLARIS gets far through RTLinker__InitRuntime, but ultimately bus errors in around the first line of RTType__UpdateCell, something in PolyBasis.
>>>>>> The data in the assembly looks like. Maybe a runtime memory corruption.
>>>>>>
>>>>>>
>>>>>> PPC32_OPENBSD complains something like in TextCat that a type is missing.
>>>>>> I think it used to mostly work since I deleted some install I had there.
>>>>>>
>>>>>>
>>>>>> SPARC64_OPENBSD bus errors just a few instructions into RTLinker__InitRuntime.
>>>>>> (gdb) disassem
>>>>>> Dump of assembler code for function RTLinker__InitRuntime:
>>>>>> 0x00000000004bd01c : save %sp, -224, %sp
>>>>>> 0x00000000004bd020 : sethi %hi(0xd18800), %l7
>>>>>> 0x00000000004bd024 : add %l7, 0x1fc, %l7 ! 0xd189fc
>>>>>> 0x00000000004bd028 : call 0x4bd010 <_m3_fault+60>
>>>>>> 0x00000000004bd02c : nop
>>>>>> 0x00000000004bd030 : stx %i0, [ %fp + 0x87f ]
>>>>>> 0x00000000004bd034 : stx %i1, [ %fp + 0x887 ]
>>>>>> 0x00000000004bd038 : stx %i2, [ %fp + 0x88f ]
>>>>>> 0x00000000004bd03c : stx %i3, [ %fp + 0x897 ]
>>>>>> 0x00000000004bd040 : sethi %hi(0x942c00), %g1
>>>>>> 0x00000000004bd044 : or %g1, 0x290, %g1 ! 0x942e90
>>>>>> 0x00000000004bd048 : ldx [ %l7 + %g1 ], %g1 << here
>>>>>>
>>>>>>
>>>>>> This seems like it'll be tough going. :(
>>>>>>
>>>>>>
>>>>>> I think I'll try with PIC turned off.
>>>>>>
>>>>>> - Jay
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>