search for: l590

...diverge: https://gist.github.com/nlw0/58ed9fda8e8944a9cb5e5a20f6038fcf This is the point I believe we need to set the function attribute for the vectorization to work with floats: https://github.com/llvm/llvm-project/blob/fd254e429ea103be8bab6271855c04919d33f9fb/llvm/lib/Analysis/IVDescriptors.cpp#L590 Could this be a bug? It seems to me it just wasn't changed yet to depend only on instruction flags. I would gladly work on refactoring this if there's an opportunity, but I'm a complete newbie in this project. It would be great to hear from someone more knowledgeable what can be done...

...ams in existence): "domain-specific compiler": http://git.videolan.org/?p=x264.git;a=blob;f=common/x86/x86inc.asm;h=ef45a2905bd8e3d920aa74d23a32fc0c169d9a57;hb=HEAD#l881 http://git.videolan.org/?p=x264.git;a=blob;f=common/x86/x86inc.asm;h=ef45a2905bd8e3d920aa74d23a32fc0c169d9a57;hb=HEAD#l590 http://git.videolan.org/?p=x264.git;a=blob;f=common/x86/dct-64.asm;h=c1aff843101f0081686f07ebe04908c7aa803e4a;hb=HEAD#l394 "portability": http://git.videolan.org/?p=x264.git;a=blob;f=common/x86/x86inc.asm;h=ef45a2905bd8e3d920aa74d23a32fc0c169d9a57;hb=HEAD#l88 -- Sean Silva > >...

...da8e8944a9cb5e5a20f6038fcf >> >> This is the point I believe we need to set the function attribute for the >> vectorization to work with floats: >> >> https://github.com/llvm/llvm-project/blob/fd254e429ea103be8bab6271855c04919d33f9fb/llvm/lib/Analysis/IVDescriptors.cpp#L590 >> >> Could this be a bug? It seems to me it just wasn't changed yet to depend >> only on instruction flags. >> >> I would gladly work on refactoring this if there's an opportunity, but >> I'm a complete newbie in this project. It would be great to he...

On Oct 26, 2013, at 5:02 PM, Chris Lattner <clattner at apple.com> wrote: > On Oct 25, 2013, at 5:22 PM, Sean Silva <chisophugis at gmail.com> wrote: >> I’m not sure macros are a good analogy, but there are other pseudo-instructions that we’re not always able to reconstruct in disassembled code back to how the user wrote them. Or if we do, it’s purely via heuristic methods. I

Greetings, The LLVM loop vectorizer does a great job handling reductions with the `min(a, b)` function over an array of integers or floats. This finds the smallest value of a list exploiting SIMD instructions, and works just as well as a summation. Specifically with floats, though, using the `fcmp` instruction, the vectorization seems to require the function attribute "no-nans-fp-math"