JuliaSIMD/LoopVectorization.jl

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Macro(s) for vectorizing loops.

Stars: 789
Forks: 73
Open beginner issues: 0
Indexed issues: 116

Dominant language: Julia
License: MIT
Last GitHub push: May 31, 2026
Latest indexed: Sep 18, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue help wanted
PR merge metrics: No merged PRs in 30d

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116 open issues indexed

Using AcuteBenchmark system Open

JuliaSIMD/LoopVectorization.jl#5 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
vmap and StaticVectors Open

JuliaSIMD/LoopVectorization.jl#7 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Some bugs Open

bug

JuliaSIMD/LoopVectorization.jl#16 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Support for complex numbers? Open

enhancement

JuliaSIMD/LoopVectorization.jl#19 · 16 comments · 4 reactions · 0 assignees · Indexed Sep 18, 2026
Multiply 2 16-bit integers and accumulate to 32-bit integer Open

JuliaSIMD/LoopVectorization.jl#37 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Assignment vectorization Open

JuliaSIMD/LoopVectorization.jl#43 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 18, 2026
KeyError: key NumType not found Open

JuliaSIMD/LoopVectorization.jl#46 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Cannot vectorize a loop with inner hidden loop (findfirst) Open

JuliaSIMD/LoopVectorization.jl#51 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
How to handle user defined functions? Open

JuliaSIMD/LoopVectorization.jl#55 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Support for RGB colors Open

JuliaSIMD/LoopVectorization.jl#67 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Predefined functions Parallelization (e.g. IntelVectorMath functions) Open

JuliaSIMD/LoopVectorization.jl#68 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Allow unrolling an arbitrary number of loops (or at least up to 4) and improve load elimination Open

JuliaSIMD/LoopVectorization.jl#73 · 11 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Support for 'triangular' loops Open

JuliaSIMD/LoopVectorization.jl#77 · 9 comments · 6 reactions · 0 assignees · Indexed Sep 18, 2026
Ryzen dot product performance Open

JuliaSIMD/LoopVectorization.jl#78 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 18, 2026
AssertionError: length(exargs) == 2 for simple loop Open

JuliaSIMD/LoopVectorization.jl#80 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 18, 2026
StackOverflowError in BitMatrix * vector multiplication even for n=10 Open

JuliaSIMD/LoopVectorization.jl#81 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Use with ForwardDiff Open

JuliaSIMD/LoopVectorization.jl#93 · 17 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Add low-level tiling API Open

enhancement

JuliaSIMD/LoopVectorization.jl#96 · 0 comments · 4 reactions · 0 assignees · Indexed Sep 18, 2026
Any way to generate random numbers inside an @avx loop? Open

enhancement

JuliaSIMD/LoopVectorization.jl#98 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Doesn't seem to handle Bool negation well Open

JuliaSIMD/LoopVectorization.jl#99 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 18, 2026
handle loop-generating expressions Open

enhancement

JuliaSIMD/LoopVectorization.jl#102 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Failing gracefully Open

JuliaSIMD/LoopVectorization.jl#103 · 32 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Consistent color for frameworks in the benchmark plots Open

JuliaSIMD/LoopVectorization.jl#107 · 11 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Hook into Zygote.jl? Open

JuliaSIMD/LoopVectorization.jl#108 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Broadcast bug Open

JuliaSIMD/LoopVectorization.jl#113 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 18, 2026
no method matching similar in broadcasting expression Open

JuliaSIMD/LoopVectorization.jl#119 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Handle loop carried dependencies that are apparent from constant offsets Open

JuliaSIMD/LoopVectorization.jl#122 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Difficulty with 8 nested loops? Open

JuliaSIMD/LoopVectorization.jl#126 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Use a polyhedral model to represent and transform the iteration space Open

JuliaSIMD/LoopVectorization.jl#129 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 18, 2026
cis (and Float64 -> ComplexF64) support? Open

JuliaSIMD/LoopVectorization.jl#131 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
AssertionError: !(iszero(length(loopstartᵢ))) Open

JuliaSIMD/LoopVectorization.jl#134 · 15 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
[bug] incorrect result Open

JuliaSIMD/LoopVectorization.jl#138 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Incorrect result in accumulator expression Open

JuliaSIMD/LoopVectorization.jl#147 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
vmap gives incorrect results for iszero Open

JuliaSIMD/LoopVectorization.jl#149 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Handle moving operations in reductions Open

JuliaSIMD/LoopVectorization.jl#151 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Boil down vmap! variants, extend to reduce & mapreduce Open

good first issue

JuliaSIMD/LoopVectorization.jl#154 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
@avx in subspace matrix multiplication is much slower than StaticArrays Open

JuliaSIMD/LoopVectorization.jl#169 · 16 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Fallback path: annotate `for` loops with `@simd`? Open

JuliaSIMD/LoopVectorization.jl#182 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Goal: get to 100% code coverage for LoopVectorization.jl Open

JuliaSIMD/LoopVectorization.jl#190 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Almost always fastest? Open

JuliaSIMD/LoopVectorization.jl#196 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Auto-cancel old CI builds Open

JuliaSIMD/LoopVectorization.jl#219 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
`@avxt` harms the performence of `.Threads` Open

JuliaSIMD/LoopVectorization.jl#221 · 18 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Loop IR interface Open

JuliaSIMD/LoopVectorization.jl#230 · 7 comments · 1 reaction · 0 assignees · Indexed Sep 18, 2026
For loops with the syntax for i in iter Open

JuliaSIMD/LoopVectorization.jl#231 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 18, 2026
tracking Special Functions' support Open

JuliaSIMD/LoopVectorization.jl#233 · 5 comments · 3 reactions · 0 assignees · Indexed Sep 18, 2026
possible to support UInt128? Open

JuliaSIMD/LoopVectorization.jl#234 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 18, 2026
"Reduction not found." error with `ifelse` Open

JuliaSIMD/LoopVectorization.jl#243 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Invalid index error & no method matching vrem_fast Open

JuliaSIMD/LoopVectorization.jl#244 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
Handing of `end` in indexing Open

JuliaSIMD/LoopVectorization.jl#246 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026
`@avx` incorrectly handling variable redefinitions between iterations Open

JuliaSIMD/LoopVectorization.jl#266 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 18, 2026

JuliaSIMD/LoopVectorization.jl

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