Displaying 3 results from an estimated 3 matches for "minnan".
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minhan
2019 May 04
2
Vectorizing minimum without function attributes
...attribute "no-nans-fp-math" to
be set. Just setting instruction flags is not enough. This forces us to
give up on fine-grained control of fast-math in the code in order to
benefit from this vectorization.
How to overcome this? LLVM has intrinsic functions such as `minnum` and
`minimum` (`minnan`) that accurately represent the operation. This could
permit fine-grained control of fast-math flags, although the vectorizer
seems to ignore these intrinsics.
Beyond this specific case, it would be nice to be sure when is it ever
necessary to set these function attributes, e.g.
https://github.com...
2019 May 04
2
Vectorizing minimum without function attributes
...an && condition that should be an
> || condition.
>
>
> This forces us to give up on fine-grained control of fast-math in the code
> in order to benefit from this vectorization.
>
> How to overcome this? LLVM has intrinsic functions such as `minnum` and
> `minimum` (`minnan`) that accurately represent the operation. This could
> permit fine-grained control of fast-math flags, although the vectorizer
> seems to ignore these intrinsics.
>
> Beyond this specific case, it would be nice to be sure when is it ever
> necessary to set these function attributes,...
2019 May 06
2
Vectorizing minimum without function attributes
...ion.
>>>
>>>
>>> This forces us to give up on fine-grained control of fast-math in the
>>> code in order to benefit from this vectorization.
>>>
>>> How to overcome this? LLVM has intrinsic functions such as `minnum` and
>>> `minimum` (`minnan`) that accurately represent the operation. This could
>>> permit fine-grained control of fast-math flags, although the vectorizer
>>> seems to ignore these intrinsics.
>>>
>>> Beyond this specific case, it would be nice to be sure when is it ever
>>> nec...