Open dcampora opened 4 years ago
As a user, having member functions simd::min_element & simd::max_element instead of hmin and hmax would reduce my cognitive burden. They would give a nod to the std algorithms that return by iterator rather than value.
Hi there,
Thanks a lot for your work on
std-simd
, it's looking very well so far!I was attempting my first code at using your library. I have previously used Vc, as well as other vectorization libraries. I bumped into the following use-case: I would like to calculate the index of the lowest element in a vector, out of some active elements in a mask. Looking at the following document:
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/n4808.pdf
I found that there is
hmin
, which can accept aconst_where_expression
, which sort-of does what I want but not quite, since this returns the value of the lowest element, not the index. In order to further fetch the index, I figured one can create yet another mask comparing with the obtained value, and then find the index of that. Ie. see the following pseudo-code:Testcase
With this, I have two questions:
hmin
anywhere in the library. Perhaps I am looking at an outdated documentation?std-simd
?