accuracy of mathematical functions
Fri Feb 5 23:01:39 GMT 2021
On 2021-02-05 03:43, Paul Zimmermann wrote:
> I have updated my comparison with the newly released 2.33 version.
> No big difference with the previous version, except that I included
> the "long double" format (aka ldbl-96), which is not supported by Newlib.
Thanks for doing this work and making it available is greatly appreciated.
While newlib is mainly targeted to smaller platforms, the Cygwin port math
library supports gcc __FLT64X_...__/__FLT128_...__ under
.../newlib-cygwin/winsup/cygwin/math/ and related includes.
As you may already be aware, clang and gcc have added support for ARM
__FLT16/__fp16, AMD and Intel have added it to x86/amd64 as CVT16/FP16C
https://en.wikipedia.org/wiki/F16C, and more compiler and library support are
likely to follow, as they are already used in graphics and GPGPU areas.
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
This email may be disturbing to some readers as it contains
too much technical detail. Reader discretion is advised.
[Data in binary units and prefixes, physical quantities in SI.]
[Shame your CORE-Math proposal was rejected: desperately needed these days, as
I've never been a math natural but often seemed more comfortable than other
programmers doing related work.
Maybe have to comb the literature on reproducible builds, need for verification
no backdoors or vulnerabilities have been introduced, and testing results
produced are identical across platforms; maybe comb Risks or contact PGN for
math horror stories as references and justifications for resubmission.]
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