1 /* crc32_simd.h
2  *
3  * Copyright 2017 The Chromium Authors. All rights reserved.
4  * Use of this source code is governed by a BSD-style license that can be
5  * found in the Chromium source repository LICENSE file.
6  */
7 
8 #include <stdint.h>
9 
10 #include "zconf.h"
11 #include "zutil.h"
12 #include "deflate.h"
13 
14 /*
15  * crc32_sse42_simd_(): compute the crc32 of the buffer, where the buffer
16  * length must be at least 64, and a multiple of 16.
17  */
18 uint32_t ZLIB_INTERNAL crc32_sse42_simd_(
19     const unsigned char *buf,
20     z_size_t len,
21     uint32_t crc);
22 
23 /*
24  * crc32_sse42_simd_ buffer size constraints: see the use in zlib/crc32.c
25  * for computing the crc32 of an arbitrary length buffer.
26  */
27 #define Z_CRC32_SSE42_MINIMUM_LENGTH 64
28 #define Z_CRC32_SSE42_CHUNKSIZE_MASK 15
29 
30 /*
31  * CRC32 checksums using ARMv8-a crypto instructions.
32  */
33 uint32_t ZLIB_INTERNAL armv8_crc32_little(unsigned long crc,
34                                           const unsigned char* buf,
35                                           z_size_t len);
36 
37