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85923c8f30
Update zlib-ng to 2.2.1 #26113 Release: https://github.com/zlib-ng/zlib-ng/releases/tag/2.2.1 ARM diagnostics patch: https://github.com/zlib-ng/zlib-ng/pull/1774 ### Pull Request Readiness Checklist See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [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 - [ ] 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
53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/utsname.h>
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#if defined(__linux__) && defined(HAVE_SYS_AUXV_H)
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# include <sys/auxv.h>
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#endif
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#include "zbuild.h"
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#include "riscv_features.h"
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#define ISA_V_HWCAP (1 << ('v' - 'a'))
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int Z_INTERNAL is_kernel_version_greater_or_equal_to_6_5() {
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struct utsname buffer;
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uname(&buffer);
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int major, minor;
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if (sscanf(buffer.release, "%d.%d", &major, &minor) != 2) {
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// Something bad with uname()
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return 0;
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}
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if (major > 6 || major == 6 && minor >= 5)
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return 1;
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return 0;
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}
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void Z_INTERNAL riscv_check_features_compile_time(struct riscv_cpu_features *features) {
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#if defined(__riscv_v) && defined(__linux__)
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features->has_rvv = 1;
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#else
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features->has_rvv = 0;
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#endif
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}
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void Z_INTERNAL riscv_check_features_runtime(struct riscv_cpu_features *features) {
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#if defined(__linux__) && defined(HAVE_SYS_AUXV_H)
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unsigned long hw_cap = getauxval(AT_HWCAP);
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#else
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unsigned long hw_cap = 0;
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#endif
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features->has_rvv = hw_cap & ISA_V_HWCAP;
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}
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void Z_INTERNAL riscv_check_features(struct riscv_cpu_features *features) {
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if (is_kernel_version_greater_or_equal_to_6_5())
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riscv_check_features_runtime(features);
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else
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riscv_check_features_compile_time(features);
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}
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