I've prepared alpha5, but cannot put it up just at the moment, as the infrastructure for the MPIR webpage has been moved and I currently don't have login access. It will hopefully be sorted soon. I hope to finish testing so that we can move to beta as soon as possible.
Bill. On 8 June 2014 22:22, Bill Hart <goodwillh...@googlemail.com> wrote: > I've managed to fix the bug. It was a single minus sign missing in an > unlikely branch in the precomputed inverse code. > > I will put out a new alpha tomorrow, as soon as I review where we are up > to in the release process. > > Sorry this has taken so long! > > Bill. > > > On 8 June 2014 19:32, Bill Hart <goodwillh...@googlemail.com> wrote: > >> It will only hit machines where SB_DIV_QR_SMALL_THRESHOLD is more than >> about 4. >> >> Bill. >> >> >> On 8 June 2014 17:40, Brian Gladman <b...@gladman.plus.com> wrote: >> >>> On 08/06/2014 15:50, Bill Hart wrote: >>> > The mpfr-3.1.2 test suite fails against MPIR-2.7.0-alpha. Specifically >>> > atan returns the wrong value. >>> > >>> > With some help from Fredrik Johansson we've tracked it down to a bug in >>> > mpn_divrem. >>> > >>> > Specifically the quotient a/b is computed incorrectly with: >>> > >>> > >>> a=+0*2^0+0*2^64+0*2^128+0*2^192+0*2^256+0*2^320+0*2^384+0*2^448+9223372036854775808*2^512 >>> > >>> > >>> b=+5441491000443887104*2^0+16890151831357120748*2^64+2531194513324792887*2^128+15023743366172631521*2^192 >>> > >>> > MPIR 2.6.0 returns the correct values with: >>> > >>> > >>> q=+2813613562306264048*2^0+18446744073709551575*2^64+18446744073709551615*2^128+18446744073709551615*2^192+11324819608111655951*2^256 >>> > >>> > >>> r=+0*2^0+17436446882452594688*2^64+10431979954583400456*2^128+818554020547913635*2^192+217622286998165104*2^256 >>> > >>> > MPIR-2.7.0-alpha returns the incorrect values: >>> > >>> > >>> q=+2813613562306263966*2^0+18446744073709551575*2^64+18446744073709551615*2^128+4202895142513760287*2^192+11324819608111655953*2^256 >>> > >>> > >>> r=+0*2^0+2470107076112546816*2^64+11918624597650930617*2^128+5462319302375862668*2^192+4800654167612485773*2^256 >>> > >>> > I will hopefully have some time later today to begin trcking down the >>> > bug, which surely lies in the division basecase, probably the >>> > precomputed inverse code. >>> >>> Is this a failure in the standard MPFR tests? I ask because this bug >>> doesn't show up on Windows x64. >>> >>> Brian >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "mpir-devel" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to mpir-devel+unsubscr...@googlegroups.com. >>> To post to this group, send email to mpir-devel@googlegroups.com. >>> Visit this group at http://groups.google.com/group/mpir-devel. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> > -- You received this message because you are subscribed to the Google Groups "mpir-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to mpir-devel+unsubscr...@googlegroups.com. To post to this group, send email to mpir-devel@googlegroups.com. Visit this group at http://groups.google.com/group/mpir-devel. For more options, visit https://groups.google.com/d/optout.
