text: //  Copyright (c) 2018, Arm Limited and affiliates. All rights reserved.
  //  This source code is licensed under both the GPLv2 (found in the
  //  COPYING file in the root directory) and Apache 2.0 License
  //  (found in the LICENSE.Apache file in the root directory).
  
  #ifndef UTIL_CRC32C_ARM64_H
  #define UTIL_CRC32C_ARM64_H
  
  #include <cinttypes>
  
  #if defined(__aarch64__) || defined(__AARCH64__)
  
  #ifdef __ARM_FEATURE_CRC32
  #define HAVE_ARM64_CRC
  #include <arm_acle.h>
  #define crc32c_u8(crc, v) __crc32cb(crc, v)
  #define crc32c_u16(crc, v) __crc32ch(crc, v)
  #define crc32c_u32(crc, v) __crc32cw(crc, v)
  #define crc32c_u64(crc, v) __crc32cd(crc, v)
  #define PREF4X64L1(buffer, PREF_OFFSET, ITR)                \
    __asm__("PRFM PLDL1KEEP, [%x[v],%[c]]" ::[v] "r"(buffer), \
            [c] "I"((PREF_OFFSET) + ((ITR) + 0) * 64));       \
    __asm__("PRFM PLDL1KEEP, [%x[v],%[c]]" ::[v] "r"(buffer), \
            [c] "I"((PREF_OFFSET) + ((ITR) + 1) * 64));       \
    __asm__("PRFM PLDL1KEEP, [%x[v],%[c]]" ::[v] "r"(buffer), \
            [c] "I"((PREF_OFFSET) + ((ITR) + 2) * 64));       \
    __asm__("PRFM PLDL1KEEP, [%x[v],%[c]]" ::[v] "r"(buffer), \
            [c] "I"((PREF_OFFSET) + ((ITR) + 3) * 64));
  
  #define PREF1KL1(buffer, PREF_OFFSET)  \
    PREF4X64L1(buffer, (PREF_OFFSET), 0) \
    PREF4X64L1(buffer, (PREF_OFFSET), 4) \
    PREF4X64L1(buffer, (PREF_OFFSET), 8) \
    PREF4X64L1(buffer, (PREF_OFFSET), 12)
  
  extern uint32_t crc32c_arm64(uint32_t crc, unsigned char const *data, unsigned len);
  extern uint32_t crc32c_runtime_check(void);
  
  #ifdef __ARM_FEATURE_CRYPTO
  #define HAVE_ARM64_CRYPTO
  #include <arm_neon.h>
  #endif  // __ARM_FEATURE_CRYPTO
  #endif  // __ARM_FEATURE_CRC32
  
  #endif  // defined(__aarch64__) || defined(__AARCH64__)
  
  #endif
  