ht_dec.c: Improve MSVC arm64 popcount performance #1479
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Use NEON instructions for ARM64 (implementation based on microsoft/STL#2127). Godbolt output here: https://godbolt.org/z/q7GPTqT14
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Friendly reminder. |
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Is testing for defined(OPJ_COMPILER_MSVC) && defined(_M_ARM64) sufficient to guarantee Neon instructions to be available ? |
asmorkalov
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Dec 10, 2023
ht_dec.c: Improve MSVC arm64 popcount performance #24205 Use NEON instructions for ARM64 (implementation based on microsoft/STL#2127, which is Apache licensed). Godbolt output here: https://godbolt.org/z/q7GPTqT14 Related patch to openjpeg: uclouvain/openjpeg#1479 ### Pull Request Readiness Checklist - [x] I agree to contribute to the project under Apache 2 License. - [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV - [x] The PR is proposed to the proper branch
thewoz
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May 29, 2024
ht_dec.c: Improve MSVC arm64 popcount performance opencv#24205 Use NEON instructions for ARM64 (implementation based on microsoft/STL#2127, which is Apache licensed). Godbolt output here: https://godbolt.org/z/q7GPTqT14 Related patch to openjpeg: uclouvain/openjpeg#1479 ### Pull Request Readiness Checklist - [x] I agree to contribute to the project under Apache 2 License. - [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV - [x] The PR is proposed to the proper branch
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Use NEON instructions for ARM64 (implementation based on microsoft/STL#2127).
Godbolt output here: https://godbolt.org/z/q7GPTqT14