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From: Jason <ja...@njkfrudils.plus.com>
To: mpir-devel@googlegroups.com
Subject: Re: [mpir-devel] MPIR-2.3.0 released
Date: Tue, 29 Mar 2011 20:11:46 +0100
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References: <201103040748.06703.jason@njkfrudils.plus.com> <AANLkTikv9NLvaZqZo1PhFdjPtR3DWjntTTA=f_uuenov@mail.gmail.com> <201103192335.40271.jason@njkfrudils.plus.com>
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On Saturday 19 March 2011 23:35:40 Jason wrote:
> On Saturday 19 March 2011 18:17:14 Jeff Gilchrist wrote:
> > On Thu, Mar 17, 2011 at 8:32 PM, Jason <ja...@njkfrudils.plus.com> wrote:
> > > Yep , it was just a hunch that was wrong , could you try putting some
> > > printf("here\n");fflush(0);
> > > between he tests in t-constants.c , so we can work out which one is the
> > > problem.
> > 
> > It stops inside this section:
> > 
> > #ifdef PP_INVERTED
> > 
> >   {
> >   
> >     mp_limb_t  pp_inverted_calc;
> >     invert_limb (pp_inverted_calc, PP);
> >     CHECK_LIMB (PP_INVERTED, pp_inverted_calc);
> >   
> >   }
> > 
> > #endif
> > 
> > It never completes:  invert_limb (pp_inverted_calc, PP);
> 
> I know we have a problem with invert_limb on ia64 with icc and no assembler
> , perhaps this is the "same" C-code , I'll have a look in longlong.h
> 
> Jason

The problem is in the files mpn/x86_68/k8/udiv.as and umul.as , they are both 
wrong. This problem only bites on a AMD 64bit with a non-gcc compiler (not 
MSVC) as there is no inline asm . I think the best solution is just to delete 
the files as any modern compiler will be able to generate better code anyway 
(certainly for umul , and I presume udiv).

Thanks
Jason