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Rewrite Universal Intrinsic code: ImgProc (CV_SIMD_WIDTH related Part) #24166 Related PR: #24058, #24132. The goal of this series of PRs is to modify the SIMD code blocks in the opencv/modules/imgproc folder by using the new Universal Intrinsic API. The modification of this PR mainly focuses on the code that uses the `CV_SIMD_WIDTH` macro. This macro is sometimes used for loop tail processing, such as `box_filter.simd.hpp` and `morph.simd.hpp`. ```cpp #if CV_SIMD int i = 0; for (i < n - v_uint16::nlanes; i += v_uint16::nlanes) { // some universal intrinsic code // e.g. v_uint16... } #if CV_SIMD_WIDTH > 16 for (i < n - v_uint16x8::nlanes; i += v_uint16x8::nlanes) { // handle loop tail by 128 bit SIMD // e.g. v_uint16x8 } #endif //CV_SIMD_WIDTH #endif// CV_SIMD ``` The main contradiction is that the variable-length Universal Intrinsic backend cannot use 128bit fixed-length data structures. Therefore, this PR uses the scalar loop to handle the loop tail. This PR is marked as draft because the modification of the `box_filter.simd.hpp` file caused a compilation error. The cause of the error is initially believed to be due to an internal error in the GCC compiler. ```bash box_filter.simd.hpp:1162:5: internal compiler error: Segmentation fault 1162 | } | ^ 0xe03883 crash_signal /wafer/share/gcc/gcc/toplev.cc:314 0x7ff261c4251f ??? ./signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0 0x6bde48 hash_set<rtl_ssa::set_info*, false, default_hash_traits<rtl_ssa::set_info*> >::iterator::operator*() /wafer/share/gcc/gcc/hash-set.h:125 0x6bde48 extract_single_source /wafer/share/gcc/gcc/config/riscv/riscv-vsetvl.cc:1184 0x6bde48 extract_single_source /wafer/share/gcc/gcc/config/riscv/riscv-vsetvl.cc:1174 0x119ad9e pass_vsetvl::propagate_avl() const /wafer/share/gcc/gcc/config/riscv/riscv-vsetvl.cc:4087 0x119ceaf pass_vsetvl::execute(function*) /wafer/share/gcc/gcc/config/riscv/riscv-vsetvl.cc:4344 0x119ceaf pass_vsetvl::execute(function*) /wafer/share/gcc/gcc/config/riscv/riscv-vsetvl.cc:4325 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. ``` This PR can be compiled with Clang 16, and `opencv_test_imgproc` is passed on QEMU. ### Pull Request Readiness Checklist See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [ ] I agree to contribute to the project under Apache 2 License. - [ ] 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 - [ ] The PR is proposed to the proper branch - [ ] There is a reference to the original bug report and related work - [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name. - [ ] The feature is well documented and sample code can be built with the project CMake |
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