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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
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/* crc32_acle.c -- compute the CRC-32 of a data stream
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* Copyright (C) 1995-2006, 2010, 2011, 2012 Mark Adler
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* Copyright (C) 2016 Yang Zhang
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* For conditions of distribution and use, see copyright notice in zlib.h
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*
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*/
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#ifdef ARM_ACLE
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#include "acle_intrins.h"
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#include "zbuild.h"
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Z_INTERNAL Z_TARGET_CRC uint32_t crc32_acle(uint32_t crc, const uint8_t *buf, size_t len) {
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Z_REGISTER uint32_t c;
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Z_REGISTER const uint16_t *buf2;
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Z_REGISTER const uint32_t *buf4;
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Z_REGISTER const uint64_t *buf8;
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c = ~crc;
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if (UNLIKELY(len == 1)) {
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c = __crc32b(c, *buf);
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c = ~c;
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return c;
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}
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if ((ptrdiff_t)buf & (sizeof(uint64_t) - 1)) {
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if (len && ((ptrdiff_t)buf & 1)) {
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c = __crc32b(c, *buf++);
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len--;
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}
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if ((len >= sizeof(uint16_t)) && ((ptrdiff_t)buf & sizeof(uint16_t))) {
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buf2 = (const uint16_t *) buf;
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c = __crc32h(c, *buf2++);
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len -= sizeof(uint16_t);
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buf4 = (const uint32_t *) buf2;
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} else {
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buf4 = (const uint32_t *) buf;
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}
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if ((len >= sizeof(uint32_t)) && ((ptrdiff_t)buf & sizeof(uint32_t))) {
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c = __crc32w(c, *buf4++);
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len -= sizeof(uint32_t);
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}
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buf8 = (const uint64_t *) buf4;
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} else {
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buf8 = (const uint64_t *) buf;
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}
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while (len >= sizeof(uint64_t)) {
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c = __crc32d(c, *buf8++);
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len -= sizeof(uint64_t);
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}
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if (len >= sizeof(uint32_t)) {
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buf4 = (const uint32_t *) buf8;
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c = __crc32w(c, *buf4++);
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len -= sizeof(uint32_t);
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buf2 = (const uint16_t *) buf4;
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} else {
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buf2 = (const uint16_t *) buf8;
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}
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if (len >= sizeof(uint16_t)) {
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c = __crc32h(c, *buf2++);
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len -= sizeof(uint16_t);
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}
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buf = (const unsigned char *) buf2;
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if (len) {
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c = __crc32b(c, *buf);
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}
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c = ~c;
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return c;
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}
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#endif
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