On 08/09/2015 21:02, Brian Gladman wrote:
> On 08/09/2015 18:30, 'Bill Hart' via mpir-devel wrote:
>>
>> ---------- Forwarded message ----------
>> From: *Tomi* <notificati...@github.com <mailto:notificati...@github.com>>
>> Date: 5 September 2015 at 18:24
>> Subject: [mpir] mpz.fac_ui : ERROR with x64 Release configuration on
>> Visual Studio 2015 (#159)
>> To: wbhart/mpir <m...@noreply.github.com <mailto:m...@noreply.github.com>>
>>
>> excerpts from run-tests.py script output:
>>
>> Testing MPIR Static Library (lib_mpir_k8_k10_k102) in Configuration
>> ...
>> mpz.divis_2exp : success
>> mpz.export : success
>> mpz.fac_ui : ERROR ( 3221225477 )
>> mpz.fdiv : success
>> ...
>> subc : success
>> 201 tests:
>> 200 ran correctly
>> 1 failed
>> .. completed - press ENTER
>>
>> (builded with Microsoft Visual C++ 2015 (Enterprise Edition) on Windows
>> 7 - 64 bit)
>>
>
> I can see this error but it won't be easy to debug as the failure
> occcurs in the karatsuba multiplication code. I suspect that something
> is wrong with the thresholds set in gmp-mparam.h for this architecture.
I have found the problem - there is a bug in the karasub.asm assembler
used on Windows for the K10/K102 architectures.
Looking at the K8/K10/K102 code in x86_64 (i.e. the GCC/Linux code) it
makes sense to fix the bug by simply using K8 assembler code for the
K10/K102 architectures on Windows. This fixes the bug.
I have added this change to my GITHUB MPIR repository.
Brian
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