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Re: Anyone working on 64-bit octave
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From: |
Thomas D. Dean |
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Subject: |
Re: Anyone working on 64-bit octave |
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Date: |
Fri, 17 Feb 2012 10:01:35 -0800 |
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User-agent: |
Mozilla/5.0 (X11; FreeBSD amd64; rv:9.0) Gecko/20120126 Thunderbird/9.0 |
On 02/17/12 08:52, Matyas Sustik wrote:
So I gather that you are looking for more than 64 bit floating point
precision.
Yes. I have some problems that underflow or overflow. I can solve them
with Maple, but, it takes lots of manipulation.
Tatsuro's link on the other hand points to the effort of using 64 bit
integer indexing, which would allow larger arrays but not higher precision.
Yes. I do not necessarily need larger arrays.
The IEEE standard defines 128 bit floating point numbers, it is also
called quad-float. I do not think that it is fully supported by
gfortran. I assume so, since there must be a reason that I cannot find
BLAS and LAPACK that features quad-float operations.
I am looking at building BLAS and LAPACK with
gfortran -fdefault-integer-8 and -default-real-8
This makes double precision 128 bits.
Tom Dean