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scalar_prod implementation #504
Description
I am missing a scalar_prod function. on ArrayBase. This seems straightforward to implement (almost blindly copy/paste scalar_sum), so I will be submitting a pull request. I am not familiar enough with computer engineering to say if an unrolled_prod is a valuable addition as well, so I will just include it in the PR awaiting feedback from someone with more background!
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jturner314 commentedon Oct 22, 2018
If you're interested, this is a pretty good article for background, even though it's talking about C++ with the MS compiler instead of Rust with LLVM. Basically, in order to allow the compiler to perform the sum/product using SIMD even with strict floating-point behavior, it's helpful to explicitly unroll and reorder the sum/product manually.
sebasv commentedon Oct 23, 2018
That seems like a very nice read, thank you!
jturner314 commentedon Oct 27, 2018
Implemented in #505.