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Why does GCC generate code that conditionally executes a SIMD implementation?

score 1199 · Answer 1 · 2024-02-16T22:17:14.233000

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1199

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Why does GCC generate code that conditionally executes a SIMD implementation?

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score 150 · Answer 9 · 2023-10-24T09:21:45.853000

Why llvm can not auto-vectorize comparing two arrays and write result to vector<bool>?

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Does GCC have a pragma to enforce auto-vectorization?

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TechQA.

List Question

Why does GCC generate code that conditionally executes a SIMD implementation?

Why can't clang vectorise this loop over a std::span, writing results to a std::array?

AVX512 auto-vectorized C++ matrix-vector functions are much slower when source = destination, in-place

Leveraging and optimizing SIMD for matrix axis looping in cython

Vectorizing vs interleaving loop C++

Efficient way to reset array of structs which contain a std::atomic member?

Why is the auto-vectorizer failing to find "vectorizable type information"?

With gcc -O3 optimization, why does the loop index's type affect gcc's internal GIMPLE vector constants (but not the final asm)?

Why llvm can not auto-vectorize comparing two arrays and write result to vector<bool>?

How to indicate the array length to the c++ compiler

Why does the compiler not use SIMD in my range-expression?

Why do compilers miss vectorization here?

Understanding JIT's rewrite of a for loop

How to vectorize JAX functions using jit compilation and vmap auto-vectorization

Why can't the Rust compiler auto-vectorize this FP dot product implementation?

Finding the index of k. set bit in an uint64_t array of length 4

Is integer vectorization accuracy / precision of integer division CPU-dependent?

What's the optimization rule of rust vectorization?

Bash Script Using API for Online Image Vectorizing

Does GCC have a pragma to enforce auto-vectorization?

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