Aaru.Checksums.Native/simd.h

#if defined(__x86_64__) || defined(__amd64) || defined(_M_AMD64) || defined(_M_X64) || defined(__I386__) ||            \
    defined(__i386__) || defined(__THW_INTEL) || defined(_M_IX86)

#define AVX2 __attribute__((target("avx2")))

int have_clmul(void);
int have_ssse3(void);
int have_avx2(void);
#endif

#if defined(__arm__) || defined(_M_ARM)
#define HWCAP_NEON (1 << 12)
#define HWCAP2_CRC32 (1 << 4)
#endif

#if defined(__aarch64__) || defined(_M_ARM64)
#define HWCAP_NEON (1 << 1)
#define HWCAP_CRC32 (1 << 7)
#endif

#if defined(__aarch64__) || defined(_M_ARM64) || defined(__arm__) || defined(_M_ARM)
int have_neon(void);
int have_arm_crc32(void);
#endif