onal quad-precision floating-point
> format is available on Wikipedia
> (https://en.wikipedia.org/wiki/Double-double_%28arithmetic%29#Double-double_arithmetic).
>
> George.
>
>
> On Feb 2, 2014, at 13:41 , Patrick Boehl
> wrote:
>
>> Hello Jeff,
>>
>
Hello Tim,
thank you for your reply!
On 01.02.2014, at 21:28, Tim Prince wrote:
> Where openmpi refers to "portable C types" I would take long double to be the
> 80-bit hardware format you would have in a standard build of gcc for x86_64.
> You should be able to gain some insight by examining
Up to now, I only found out that
__float128 should
be somehow the sum of two doubles.
Again, I am grateful for any help!
Best regards,
Patrick
> On Sat, Feb 1, 2014 at 2:28 PM, Tim Prince wrote:
>>
>> On 02/01/2014 12:42 PM, Patrick Boehl wrote:
>>>
>>>
Hi all,
I have a question on datatypes in openmpi:
Is there an (easy?) way to use __float128 variables with openmpi?
Specifically, functions like
MPI_Allreduce
seem to give weird results with __float128.
Essentially all I found was
http://beige.ucs.indiana.edu/I590/node100.html
where they
