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2957f5084d
* Update zlibng * Set cmake path more directly in zlibng to hopefully fix an issue with the build on drone * I'm dumb, missing / in path * Mackal helps with a dumb gitignore issue * Adding all the files, not sure what's ignoring them and im tired of looking * Some tweaks to zlibng build to hopefully get it to build properly. works on msvc now
111 lines
2.7 KiB
C
111 lines
2.7 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_CRC_HASH
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#ifndef _MSC_VER
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# include <arm_acle.h>
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#endif
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#include "../../zutil.h"
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uint32_t crc32_acle(uint32_t crc, const unsigned char *buf, uint64_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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c = ~crc;
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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 defined(__aarch64__)
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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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const uint64_t *buf8 = (const uint64_t *) buf4;
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#ifdef UNROLL_MORE
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while (len >= 4 * sizeof(uint64_t)) {
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c = __crc32d(c, *buf8++);
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c = __crc32d(c, *buf8++);
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c = __crc32d(c, *buf8++);
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c = __crc32d(c, *buf8++);
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len -= 4 * sizeof(uint64_t);
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}
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#endif
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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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#else /* __aarch64__ */
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# ifdef UNROLL_MORE
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while (len >= 8 * sizeof(uint32_t)) {
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c = __crc32w(c, *buf4++);
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c = __crc32w(c, *buf4++);
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c = __crc32w(c, *buf4++);
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c = __crc32w(c, *buf4++);
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c = __crc32w(c, *buf4++);
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c = __crc32w(c, *buf4++);
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c = __crc32w(c, *buf4++);
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c = __crc32w(c, *buf4++);
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len -= 8 * sizeof(uint32_t);
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}
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# endif
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while (len >= 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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if (len >= sizeof(uint16_t)) {
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buf2 = (const uint16_t *) buf4;
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c = __crc32h(c, *buf2++);
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len -= sizeof(uint16_t);
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buf = (const unsigned char *) buf2;
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} else {
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buf = (const unsigned char *) buf4;
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}
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#endif /* __aarch64__ */
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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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