/*
 *  Copyright (c) 2016-2020 Positive Technologies, https://www.ptsecurity.com,
 *  Fast Positive Hash.
 *
 *  Portions Copyright (c) 2010-2020 Leonid Yuriev <leo@yuriev.ru>,
 *  The 1Hippeus project (t1h).
 *
 *  This software is provided 'as-is', without any express or implied
 *  warranty. In no event will the authors be held liable for any damages
 *  arising from the use of this software.
 *
 *  Permission is granted to anyone to use this software for any purpose,
 *  including commercial applications, and to alter it and redistribute it
 *  freely, subject to the following restrictions:
 *
 *  1. The origin of this software must not be misrepresented; you must not
 *     claim that you wrote the original software. If you use this software
 *     in a product, an acknowledgement in the product documentation would be
 *     appreciated but is not required.
 *  2. Altered source versions must be plainly marked as such, and must not be
 *     misrepresented as being the original software.
 *  3. This notice may not be removed or altered from any source distribution.
 */

/*
 * t1ha = { Fast Positive Hash, aka "Позитивный Хэш" }
 * by [Positive Technologies](https://www.ptsecurity.ru)
 *
 * Briefly, it is a 64-bit Hash Function:
 *  1. Created for 64-bit little-endian platforms, in predominantly for x86_64,
 *     but portable and without penalties it can run on any 64-bit CPU.
 *  2. In most cases up to 15% faster than City64, xxHash, mum-hash, metro-hash
 *     and all others portable hash-functions (which do not use specific
 *     hardware tricks).
 *  3. Not suitable for cryptography.
 *
 * The Future will (be) Positive. Всё будет хорошо.
 *
 * ACKNOWLEDGEMENT:
 * The t1ha was originally developed by Leonid Yuriev (Леонид Юрьев)
 * for The 1Hippeus project - zerocopy messaging in the spirit of Sparta!
 */

#pragma once

#if defined(_MSC_VER)
  #pragma warning(disable : 4201)                  /* nameless struct/union */
  #if _MSC_VER > 1800
    #pragma warning(disable : 4464)  /* relative include path contains '..' */
  #endif                                                            /* 1800 */
#endif                                                              /* MSVC */
#include "t1ha.h"

#ifndef T1HA_USE_FAST_ONESHOT_READ
  /* Define it to 1 for little bit faster code.
   * Unfortunately this may triggering a false-positive alarms from Valgrind,
   * AddressSanitizer and other similar tool.
   * So, define it to 0 for calmness if doubt. */
  #define T1HA_USE_FAST_ONESHOT_READ 1
#endif                                        /* T1HA_USE_FAST_ONESHOT_READ */

/*****************************************************************************/

#include <assert.h>                                         /* for assert() */
#include <stdbool.h>                                            /* for bool */
#include <string.h>                                         /* for memcpy() */

#if __BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__ && \
    __BYTE_ORDER__ != __ORDER_BIG_ENDIAN__
  #error Unsupported byte order.
#endif

#define T1HA_UNALIGNED_ACCESS__UNABLE 0
#define T1HA_UNALIGNED_ACCESS__SLOW 1
#define T1HA_UNALIGNED_ACCESS__EFFICIENT 2

#ifndef T1HA_SYS_UNALIGNED_ACCESS
  #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS)
    #define T1HA_SYS_UNALIGNED_ACCESS T1HA_UNALIGNED_ACCESS__EFFICIENT
  #elif defined(__ia32__)
    #define T1HA_SYS_UNALIGNED_ACCESS T1HA_UNALIGNED_ACCESS__EFFICIENT
  #elif defined(__e2k__)
    #define T1HA_SYS_UNALIGNED_ACCESS T1HA_UNALIGNED_ACCESS__SLOW
  #elif defined(__ARM_FEATURE_UNALIGNED)
    #define T1HA_SYS_UNALIGNED_ACCESS T1HA_UNALIGNED_ACCESS__EFFICIENT
  #else
    #define T1HA_SYS_UNALIGNED_ACCESS T1HA_UNALIGNED_ACCESS__UNABLE
  #endif
#endif                                         /* T1HA_SYS_UNALIGNED_ACCESS */

#define ALIGNMENT_16 2
#define ALIGNMENT_32 4
#if UINTPTR_MAX > 0xffffFFFFul || ULONG_MAX > 0xffffFFFFul
  #define ALIGNMENT_64 8
#else
  #define ALIGNMENT_64 4
#endif

#ifndef PAGESIZE
  #define PAGESIZE 4096
#endif                                                          /* PAGESIZE */

/***************************************************************************/

#ifndef __has_builtin
  #define __has_builtin(x) (0)
#endif

#ifndef __has_warning
  #define __has_warning(x) (0)
#endif

#ifndef __has_feature
  #define __has_feature(x) (0)
#endif

#ifndef __has_extension
  #define __has_extension(x) (0)
#endif

#if __has_feature(address_sanitizer)
  #define __SANITIZE_ADDRESS__ 1
#endif

#ifndef __optimize
  #if defined(__clang__) && !__has_attribute(__optimize__)
    #define __optimize(ops)
  #elif defined(__GNUC__) || __has_attribute(__optimize__)
    #define __optimize(ops) __attribute__((__optimize__(ops)))
  #else
    #define __optimize(ops)
  #endif
#endif                                                        /* __optimize */

#ifndef __cold
  #if defined(__OPTIMIZE__)
    #if defined(__e2k__)
      #define __cold __optimize(1) __attribute__((__cold__))
    #elif defined(__clang__) && !__has_attribute(__cold__) && \
        __has_attribute(__section__)
    /* just put infrequently used functions in separate section */
      #define __cold \
        __attribute__((__section__("text.unlikely"))) __optimize("Os")
    #elif defined(__GNUC__) || __has_attribute(__cold__)
      #define __cold __attribute__((__cold__)) __optimize("Os")
    #else
      #define __cold __optimize("Os")
    #endif
  #else
    #define __cold
  #endif
#endif                                                            /* __cold */

#if __GNUC_PREREQ(4, 4) || defined(__clang__)

  #if defined(__ia32__) || defined(__e2k__)
    #include <x86intrin.h>
  #endif

  #if defined(__ia32__) && !defined(__cpuid_count)
    #include <cpuid.h>
  #endif

  #if defined(__e2k__)
    #include <e2kbuiltin.h>
  #endif

  #ifndef likely
    #define likely(cond) __builtin_expect(!!(cond), 1)
  #endif

  #ifndef unlikely
    #define unlikely(cond) __builtin_expect(!!(cond), 0)
  #endif

  #if __GNUC_PREREQ(4, 5) || __has_builtin(__builtin_unreachable)
    #define unreachable() __builtin_unreachable()
  #endif

  #define bswap64(v) __builtin_bswap64(v)
  #define bswap32(v) __builtin_bswap32(v)
  #if __GNUC_PREREQ(4, 8) || __has_builtin(__builtin_bswap16)
    #define bswap16(v) __builtin_bswap16(v)
  #endif

  #if !defined(__maybe_unused) && \
      (__GNUC_PREREQ(4, 3) || __has_attribute(__unused__))
    #define __maybe_unused __attribute__((__unused__))
  #endif

  #if !defined(__always_inline) && \
      (__GNUC_PREREQ(3, 2) || __has_attribute(__always_inline__))
    #define __always_inline __inline __attribute__((__always_inline__))
  #endif

  #if defined(__e2k__)

    #if __iset__ >= 3
      #define mul_64x64_high(a, b) __builtin_e2k_umulhd(a, b)
    #endif                                                 /* __iset__ >= 3 */

    #if __iset__ >= 5
static __maybe_unused __always_inline unsigned e2k_add64carry_first(
    uint64_t base, uint64_t addend, uint64_t *sum) {

  *sum = base + addend;
  return (unsigned)__builtin_e2k_addcd_c(base, addend, 0);

}

      #define add64carry_first(base, addend, sum) \
        e2k_add64carry_first(base, addend, sum)

static __maybe_unused __always_inline unsigned e2k_add64carry_next(
    unsigned carry, uint64_t base, uint64_t addend, uint64_t *sum) {

  *sum = __builtin_e2k_addcd(base, addend, carry);
  return (unsigned)__builtin_e2k_addcd_c(base, addend, carry);

}

      #define add64carry_next(carry, base, addend, sum) \
        e2k_add64carry_next(carry, base, addend, sum)

static __maybe_unused __always_inline void e2k_add64carry_last(unsigned  carry,
                                                               uint64_t  base,
                                                               uint64_t  addend,
                                                               uint64_t *sum) {

  *sum = __builtin_e2k_addcd(base, addend, carry);

}

      #define add64carry_last(carry, base, addend, sum) \
        e2k_add64carry_last(carry, base, addend, sum)
    #endif                                                 /* __iset__ >= 5 */

    #define fetch64_be_aligned(ptr) ((uint64_t)__builtin_e2k_ld_64s_be(ptr))
    #define fetch32_be_aligned(ptr) ((uint32_t)__builtin_e2k_ld_32u_be(ptr))

  #endif                                                  /* __e2k__ Elbrus */

#elif defined(_MSC_VER)

  #if _MSC_FULL_VER < 190024234 && defined(_M_IX86)
    #pragma message( \
        "For AES-NI at least \"Microsoft C/C++ Compiler\" version 19.00.24234 (Visual Studio 2015 Update 3) is required.")
  #endif
  #if _MSC_FULL_VER < 191526730
    #pragma message( \
        "It is recommended to use \"Microsoft C/C++ Compiler\" version 19.15.26730 (Visual Studio 2017 15.8) or newer.")
  #endif
  #if _MSC_FULL_VER < 180040629
    #error At least "Microsoft C/C++ Compiler" version 18.00.40629 (Visual Studio 2013 Update 5) is required.
  #endif

  #pragma warning(push, 1)

  #include <intrin.h>
  #include <stdlib.h>
  #define likely(cond) (cond)
  #define unlikely(cond) (cond)
  #define unreachable() __assume(0)
  #define bswap64(v) _byteswap_uint64(v)
  #define bswap32(v) _byteswap_ulong(v)
  #define bswap16(v) _byteswap_ushort(v)
  #define rot64(v, s) _rotr64(v, s)
  #define rot32(v, s) _rotr(v, s)
  #define __always_inline __forceinline

  #if defined(_M_X64) || defined(_M_IA64)
    #pragma intrinsic(_umul128)
    #define mul_64x64_128(a, b, ph) _umul128(a, b, ph)
    #pragma intrinsic(_addcarry_u64)
    #define add64carry_first(base, addend, sum) \
      _addcarry_u64(0, base, addend, sum)
    #define add64carry_next(carry, base, addend, sum) \
      _addcarry_u64(carry, base, addend, sum)
    #define add64carry_last(carry, base, addend, sum) \
      (void)_addcarry_u64(carry, base, addend, sum)
  #endif

  #if defined(_M_ARM64) || defined(_M_X64) || defined(_M_IA64)
    #pragma intrinsic(__umulh)
    #define mul_64x64_high(a, b) __umulh(a, b)
  #endif

  #if defined(_M_IX86)
    #pragma intrinsic(__emulu)
    #define mul_32x32_64(a, b) __emulu(a, b)

    #if _MSC_VER >= 1915            /* LY: workaround for SSA-optimizer bug */
      #pragma intrinsic(_addcarry_u32)
      #define add32carry_first(base, addend, sum) \
        _addcarry_u32(0, base, addend, sum)
      #define add32carry_next(carry, base, addend, sum) \
        _addcarry_u32(carry, base, addend, sum)
      #define add32carry_last(carry, base, addend, sum) \
        (void)_addcarry_u32(carry, base, addend, sum)

static __forceinline char msvc32_add64carry_first(uint64_t  base,
                                                  uint64_t  addend,
                                                  uint64_t *sum) {

  uint32_t *const sum32 = (uint32_t *)sum;
  const uint32_t  base_32l = (uint32_t)base;
  const uint32_t  base_32h = (uint32_t)(base >> 32);
  const uint32_t  addend_32l = (uint32_t)addend;
  const uint32_t  addend_32h = (uint32_t)(addend >> 32);
  return add32carry_next(add32carry_first(base_32l, addend_32l, sum32),
                         base_32h, addend_32h, sum32 + 1);

}

      #define add64carry_first(base, addend, sum) \
        msvc32_add64carry_first(base, addend, sum)

static __forceinline char msvc32_add64carry_next(char carry, uint64_t base,
                                                 uint64_t  addend,
                                                 uint64_t *sum) {

  uint32_t *const sum32 = (uint32_t *)sum;
  const uint32_t  base_32l = (uint32_t)base;
  const uint32_t  base_32h = (uint32_t)(base >> 32);
  const uint32_t  addend_32l = (uint32_t)addend;
  const uint32_t  addend_32h = (uint32_t)(addend >> 32);
  return add32carry_next(add32carry_next(carry, base_32l, addend_32l, sum32),
                         base_32h, addend_32h, sum32 + 1);

}

      #define add64carry_next(carry, base, addend, sum) \
        msvc32_add64carry_next(carry, base, addend, sum)

static __forceinline void msvc32_add64carry_last(char carry, uint64_t base,
                                                 uint64_t  addend,
                                                 uint64_t *sum) {

  uint32_t *const sum32 = (uint32_t *)sum;
  const uint32_t  base_32l = (uint32_t)base;
  const uint32_t  base_32h = (uint32_t)(base >> 32);
  const uint32_t  addend_32l = (uint32_t)addend;
  const uint32_t  addend_32h = (uint32_t)(addend >> 32);
  add32carry_last(add32carry_next(carry, base_32l, addend_32l, sum32), base_32h,
                  addend_32h, sum32 + 1);

}

      #define add64carry_last(carry, base, addend, sum) \
        msvc32_add64carry_last(carry, base, addend, sum)
    #endif                                    /* _MSC_FULL_VER >= 190024231 */

  #elif defined(_M_ARM)
    #define mul_32x32_64(a, b) _arm_umull(a, b)
  #endif

  #pragma warning(pop)
  #pragma warning(disable : 4514) /* 'xyz': unreferenced inline function \
                                     has been removed */
  #pragma warning(disable : 4710)            /* 'xyz': function not inlined */
  #pragma warning(disable : 4711) /* function 'xyz' selected for \
                                     automatic inline expansion */
  #pragma warning(disable : 4127)     /* conditional expression is constant */
  #pragma warning(disable : 4702)                       /* unreachable code */
#endif                                                          /* Compiler */

#ifndef likely
  #define likely(cond) (cond)
#endif
#ifndef unlikely
  #define unlikely(cond) (cond)
#endif
#ifndef __maybe_unused
  #define __maybe_unused
#endif
#ifndef __always_inline
  #define __always_inline __inline
#endif
#ifndef unreachable
  #define unreachable() \
    do {                \
                        \
    } while (1)
#endif

#ifndef bswap64
  #if defined(bswap_64)
    #define bswap64 bswap_64
  #elif defined(__bswap_64)
    #define bswap64 __bswap_64
  #else
static __always_inline uint64_t bswap64(uint64_t v) {

  return v << 56 | v >> 56 | ((v << 40) & UINT64_C(0x00ff000000000000)) |
         ((v << 24) & UINT64_C(0x0000ff0000000000)) |
         ((v << 8) & UINT64_C(0x000000ff00000000)) |
         ((v >> 8) & UINT64_C(0x00000000ff000000)) |
         ((v >> 24) & UINT64_C(0x0000000000ff0000)) |
         ((v >> 40) & UINT64_C(0x000000000000ff00));

}

  #endif
#endif                                                           /* bswap64 */

#ifndef bswap32
  #if defined(bswap_32)
    #define bswap32 bswap_32
  #elif defined(__bswap_32)
    #define bswap32 __bswap_32
  #else
static __always_inline uint32_t bswap32(uint32_t v) {

  return v << 24 | v >> 24 | ((v << 8) & UINT32_C(0x00ff0000)) |
         ((v >> 8) & UINT32_C(0x0000ff00));

}

  #endif
#endif                                                           /* bswap32 */

#ifndef bswap16
  #if defined(bswap_16)
    #define bswap16 bswap_16
  #elif defined(__bswap_16)
    #define bswap16 __bswap_16
  #else
static __always_inline uint16_t bswap16(uint16_t v) {

  return v << 8 | v >> 8;

}

  #endif
#endif                                                           /* bswap16 */

#if defined(__ia32__) || \
    T1HA_SYS_UNALIGNED_ACCESS == T1HA_UNALIGNED_ACCESS__EFFICIENT
  /* The __builtin_assume_aligned() leads gcc/clang to load values into the
   * registers, even when it is possible to directly use an operand from memory.
   * This can lead to a shortage of registers and a significant slowdown.
   * Therefore avoid unnecessary use of  __builtin_assume_aligned() for x86. */
  #define read_unaligned(ptr, bits) (*(const uint##bits##_t *__restrict)(ptr))
  #define read_aligned(ptr, bits) (*(const uint##bits##_t *__restrict)(ptr))
#endif                                                          /* __ia32__ */

#ifndef read_unaligned
  #if defined(__GNUC__) || __has_attribute(__packed__)
typedef struct {

  uint8_t  unaligned_8;
  uint16_t unaligned_16;
  uint32_t unaligned_32;
  uint64_t unaligned_64;

} __attribute__((__packed__)) t1ha_unaligned_proxy;

    #define read_unaligned(ptr, bits)                                   \
      (((const t1ha_unaligned_proxy *)((const uint8_t *)(ptr)-offsetof( \
            t1ha_unaligned_proxy, unaligned_##bits)))                   \
           ->unaligned_##bits)
  #elif defined(_MSC_VER)
    #pragma warning(                                                 \
        disable : 4235) /* nonstandard extension used: '__unaligned' \
                         * keyword not supported on this architecture */
    #define read_unaligned(ptr, bits) \
      (*(const __unaligned uint##bits##_t *)(ptr))
  #else
    #pragma pack(push, 1)
typedef struct {

  uint8_t  unaligned_8;
  uint16_t unaligned_16;
  uint32_t unaligned_32;
  uint64_t unaligned_64;

} t1ha_unaligned_proxy;

    #pragma pack(pop)
    #define read_unaligned(ptr, bits)                                   \
      (((const t1ha_unaligned_proxy *)((const uint8_t *)(ptr)-offsetof( \
            t1ha_unaligned_proxy, unaligned_##bits)))                   \
           ->unaligned_##bits)
  #endif
#endif                                                    /* read_unaligned */

#ifndef read_aligned
  #if __GNUC_PREREQ(4, 8) || __has_builtin(__builtin_assume_aligned)
    #define read_aligned(ptr, bits) \
      (*(const uint##bits##_t *)__builtin_assume_aligned(ptr, ALIGNMENT_##bits))
  #elif (__GNUC_PREREQ(3, 3) || __has_attribute(__aligned__)) && \
      !defined(__clang__)
    #define read_aligned(ptr, bits) \
      (*(const uint##bits##_t       \
         __attribute__((__aligned__(ALIGNMENT_##bits))) *)(ptr))
  #elif __has_attribute(__assume_aligned__)

static __always_inline const uint16_t *__attribute__((
    __assume_aligned__(ALIGNMENT_16))) cast_aligned_16(const void *ptr) {

  return (const uint16_t *)ptr;

}

static __always_inline const uint32_t *__attribute__((
    __assume_aligned__(ALIGNMENT_32))) cast_aligned_32(const void *ptr) {

  return (const uint32_t *)ptr;

}

static __always_inline const uint64_t *__attribute__((
    __assume_aligned__(ALIGNMENT_64))) cast_aligned_64(const void *ptr) {

  return (const uint64_t *)ptr;

}

    #define read_aligned(ptr, bits) (*cast_aligned_##bits(ptr))

  #elif defined(_MSC_VER)
    #define read_aligned(ptr, bits) \
      (*(const __declspec(align(ALIGNMENT_##bits)) uint##bits##_t *)(ptr))
  #else
    #define read_aligned(ptr, bits) (*(const uint##bits##_t *)(ptr))
  #endif
#endif                                                      /* read_aligned */

#ifndef prefetch
  #if (__GNUC_PREREQ(4, 0) || __has_builtin(__builtin_prefetch)) && \
      !defined(__ia32__)
    #define prefetch(ptr) __builtin_prefetch(ptr)
  #elif defined(_M_ARM64) || defined(_M_ARM)
    #define prefetch(ptr) __prefetch(ptr)
  #else
    #define prefetch(ptr) \
      do {                \
                          \
        (void)(ptr);      \
                          \
      } while (0)

  #endif
#endif                                                          /* prefetch */

#if __has_warning("-Wconstant-logical-operand")
  #if defined(__clang__)
    #pragma clang diagnostic ignored "-Wconstant-logical-operand"
  #elif defined(__GNUC__)
    #pragma GCC diagnostic ignored "-Wconstant-logical-operand"
  #else
    #pragma warning disable "constant-logical-operand"
  #endif
#endif                                        /* -Wconstant-logical-operand */

#if __has_warning("-Wtautological-pointer-compare")
  #if defined(__clang__)
    #pragma clang diagnostic ignored "-Wtautological-pointer-compare"
  #elif defined(__GNUC__)
    #pragma GCC diagnostic ignored "-Wtautological-pointer-compare"
  #else
    #pragma warning disable "tautological-pointer-compare"
  #endif
#endif                                    /* -Wtautological-pointer-compare */

/***************************************************************************/

#if __GNUC_PREREQ(4, 0)
  #pragma GCC visibility push(hidden)
#endif                                                /* __GNUC_PREREQ(4,0) */

/*---------------------------------------------------------- Little Endian */

#ifndef fetch16_le_aligned
static __maybe_unused __always_inline uint16_t
fetch16_le_aligned(const void *v) {

  assert(((uintptr_t)v) % ALIGNMENT_16 == 0);
  #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
  return read_aligned(v, 16);
  #else
  return bswap16(read_aligned(v, 16));
  #endif

}

#endif                                                /* fetch16_le_aligned */

#ifndef fetch16_le_unaligned
static __maybe_unused __always_inline uint16_t
fetch16_le_unaligned(const void *v) {

  #if T1HA_SYS_UNALIGNED_ACCESS == T1HA_UNALIGNED_ACCESS__UNABLE
  const uint8_t *p = (const uint8_t *)v;
  return p[0] | (uint16_t)p[1] << 8;
  #elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
  return read_unaligned(v, 16);
  #else
  return bswap16(read_unaligned(v, 16));
  #endif

}

#endif                                              /* fetch16_le_unaligned */

#ifndef fetch32_le_aligned
static __maybe_unused __always_inline uint32_t
fetch32_le_aligned(const void *v) {

  assert(((uintptr_t)v) % ALIGNMENT_32 == 0);
  #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
  return read_aligned(v, 32);
  #else
  return bswap32(read_aligned(v, 32));
  #endif

}

#endif                                                /* fetch32_le_aligned */

#ifndef fetch32_le_unaligned
static __maybe_unused __always_inline uint32_t
fetch32_le_unaligned(const void *v) {

  #if T1HA_SYS_UNALIGNED_ACCESS == T1HA_UNALIGNED_ACCESS__UNABLE
  return fetch16_le_unaligned(v) |
         (uint32_t)fetch16_le_unaligned((const uint8_t *)v + 2) << 16;
  #elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
  return read_unaligned(v, 32);
  #else
  return bswap32(read_unaligned(v, 32));
  #endif

}

#endif                                              /* fetch32_le_unaligned */

#ifndef fetch64_le_aligned
static __maybe_unused __always_inline uint64_t
fetch64_le_aligned(const void *v) {

  assert(((uintptr_t)v) % ALIGNMENT_64 == 0);
  #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
  return read_aligned(v, 64);
  #else
  return bswap64(read_aligned(v, 64));
  #endif

}

#endif                                                /* fetch64_le_aligned */

#ifndef fetch64_le_unaligned
static __maybe_unused __always_inline uint64_t
fetch64_le_unaligned(const void *v) {

  #if T1HA_SYS_UNALIGNED_ACCESS == T1HA_UNALIGNED_ACCESS__UNABLE
  return fetch32_le_unaligned(v) |
         (uint64_t)fetch32_le_unaligned((const uint8_t *)v + 4) << 32;
  #elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
  return read_unaligned(v, 64);
  #else
  return bswap64(read_unaligned(v, 64));
  #endif

}

#endif                                              /* fetch64_le_unaligned */

static __maybe_unused __always_inline uint64_t tail64_le_aligned(const void *v,
                                                                 size_t tail) {

  const uint8_t *const p = (const uint8_t *)v;
#if T1HA_USE_FAST_ONESHOT_READ && !defined(__SANITIZE_ADDRESS__)
  /* We can perform a 'oneshot' read, which is little bit faster. */
  const unsigned shift = ((8 - tail) & 7) << 3;
  return fetch64_le_aligned(p) & ((~UINT64_C(0)) >> shift);
#else
  uint64_t r = 0;
  switch (tail & 7) {

    default:
      unreachable();
  /* fall through */
  #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
    /* For most CPUs this code is better when not needed byte reordering. */
    case 0:
      return fetch64_le_aligned(p);
    case 7:
      r = (uint64_t)p[6] << 8;
    /* fall through */
    case 6:
      r += p[5];
      r <<= 8;
    /* fall through */
    case 5:
      r += p[4];
      r <<= 32;
    /* fall through */
    case 4:
      return r + fetch32_le_aligned(p);
    case 3:
      r = (uint64_t)p[2] << 16;
    /* fall through */
    case 2:
      return r + fetch16_le_aligned(p);
    case 1:
      return p[0];
  #else
    case 0:
      r = p[7] << 8;
    /* fall through */
    case 7:
      r += p[6];
      r <<= 8;
    /* fall through */
    case 6:
      r += p[5];
      r <<= 8;
    /* fall through */
    case 5:
      r += p[4];
      r <<= 8;
    /* fall through */
    case 4:
      r += p[3];
      r <<= 8;
    /* fall through */
    case 3:
      r += p[2];
      r <<= 8;
    /* fall through */
    case 2:
      r += p[1];
      r <<= 8;
    /* fall through */
    case 1:
      return r + p[0];
  #endif

  }

#endif                                        /* T1HA_USE_FAST_ONESHOT_READ */

}

#if T1HA_USE_FAST_ONESHOT_READ &&                                 \
    T1HA_SYS_UNALIGNED_ACCESS != T1HA_UNALIGNED_ACCESS__UNABLE && \
    defined(PAGESIZE) && PAGESIZE > 42 && !defined(__SANITIZE_ADDRESS__)
  #define can_read_underside(ptr, size) \
    (((PAGESIZE - (size)) & (uintptr_t)(ptr)) != 0)
#endif                                        /* T1HA_USE_FAST_ONESHOT_READ */

static __maybe_unused __always_inline uint64_t
tail64_le_unaligned(const void *v, size_t tail) {

  const uint8_t *p = (const uint8_t *)v;
#if defined(can_read_underside) && \
    (UINTPTR_MAX > 0xffffFFFFul || ULONG_MAX > 0xffffFFFFul)
  /* On some systems (e.g. x86_64) we can perform a 'oneshot' read, which
   * is little bit faster. Thanks Marcin Żukowski <marcin.zukowski@gmail.com>
   * for the reminder. */
  const unsigned offset = (8 - tail) & 7;
  const unsigned shift = offset << 3;
  if (likely(can_read_underside(p, 8))) {

    p -= offset;
    return fetch64_le_unaligned(p) >> shift;

  }

  return fetch64_le_unaligned(p) & ((~UINT64_C(0)) >> shift);
#else
  uint64_t r = 0;
  switch (tail & 7) {

    default:
      unreachable();
  /* fall through */
  #if T1HA_SYS_UNALIGNED_ACCESS == T1HA_UNALIGNED_ACCESS__EFFICIENT && \
      __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
    /* For most CPUs this code is better when not needed
     * copying for alignment or byte reordering. */
    case 0:
      return fetch64_le_unaligned(p);
    case 7:
      r = (uint64_t)p[6] << 8;
    /* fall through */
    case 6:
      r += p[5];
      r <<= 8;
    /* fall through */
    case 5:
      r += p[4];
      r <<= 32;
    /* fall through */
    case 4:
      return r + fetch32_le_unaligned(p);
    case 3:
      r = (uint64_t)p[2] << 16;
    /* fall through */
    case 2:
      return r + fetch16_le_unaligned(p);
    case 1:
      return p[0];
  #else
    /* For most CPUs this code is better than a
     * copying for alignment and/or byte reordering. */
    case 0:
      r = p[7] << 8;
    /* fall through */
    case 7:
      r += p[6];
      r <<= 8;
    /* fall through */
    case 6:
      r += p[5];
      r <<= 8;
    /* fall through */
    case 5:
      r += p[4];
      r <<= 8;
    /* fall through */
    case 4:
      r += p[3];
      r <<= 8;
    /* fall through */
    case 3:
      r += p[2];
      r <<= 8;
    /* fall through */
    case 2:
      r += p[1];
      r <<= 8;
    /* fall through */
    case 1:
      return r + p[0];
  #endif

  }

#endif                                                /* can_read_underside */

}

/*------------------------------------------------------------- Big Endian */

#ifndef fetch16_be_aligned
static __maybe_unused __always_inline uint16_t
fetch16_be_aligned(const void *v) {

  assert(((uintptr_t)v) % ALIGNMENT_16 == 0);
  #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
  return read_aligned(v, 16);
  #else
  return bswap16(read_aligned(v, 16));
  #endif

}

#endif                                                /* fetch16_be_aligned */

#ifndef fetch16_be_unaligned
static __maybe_unused __always_inline uint16_t
fetch16_be_unaligned(const void *v) {

  #if T1HA_SYS_UNALIGNED_ACCESS == T1HA_UNALIGNED_ACCESS__UNABLE
  const uint8_t *p = (const uint8_t *)v;
  return (uint16_t)p[0] << 8 | p[1];
  #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
  return read_unaligned(v, 16);
  #else
  return bswap16(read_unaligned(v, 16));
  #endif

}

#endif                                              /* fetch16_be_unaligned */

#ifndef fetch32_be_aligned
static __maybe_unused __always_inline uint32_t
fetch32_be_aligned(const void *v) {

  assert(((uintptr_t)v) % ALIGNMENT_32 == 0);
  #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
  return read_aligned(v, 32);
  #else
  return bswap32(read_aligned(v, 32));
  #endif

}

#endif                                                /* fetch32_be_aligned */

#ifndef fetch32_be_unaligned
static __maybe_unused __always_inline uint32_t
fetch32_be_unaligned(const void *v) {

  #if T1HA_SYS_UNALIGNED_ACCESS == T1HA_UNALIGNED_ACCESS__UNABLE
  return (uint32_t)fetch16_be_unaligned(v) << 16 |
         fetch16_be_unaligned((const uint8_t *)v + 2);
  #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
  return read_unaligned(v, 32);
  #else
  return bswap32(read_unaligned(v, 32));
  #endif

}

#endif                                              /* fetch32_be_unaligned */

#ifndef fetch64_be_aligned
static __maybe_unused __always_inline uint64_t
fetch64_be_aligned(const void *v) {

  assert(((uintptr_t)v) % ALIGNMENT_64 == 0);
  #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
  return read_aligned(v, 64);
  #else
  return bswap64(read_aligned(v, 64));
  #endif

}

#endif                                                /* fetch64_be_aligned */

#ifndef fetch64_be_unaligned
static __maybe_unused __always_inline uint64_t
fetch64_be_unaligned(const void *v) {

  #if T1HA_SYS_UNALIGNED_ACCESS == T1HA_UNALIGNED_ACCESS__UNABLE
  return (uint64_t)fetch32_be_unaligned(v) << 32 |
         fetch32_be_unaligned((const uint8_t *)v + 4);
  #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
  return read_unaligned(v, 64);
  #else
  return bswap64(read_unaligned(v, 64));
  #endif

}

#endif                                              /* fetch64_be_unaligned */

static __maybe_unused __always_inline uint64_t tail64_be_aligned(const void *v,
                                                                 size_t tail) {

  const uint8_t *const p = (const uint8_t *)v;
#if T1HA_USE_FAST_ONESHOT_READ && !defined(__SANITIZE_ADDRESS__)
  /* We can perform a 'oneshot' read, which is little bit faster. */
  const unsigned shift = ((8 - tail) & 7) << 3;
  return fetch64_be_aligned(p) >> shift;
#else
  switch (tail & 7) {

    default:
      unreachable();
  /* fall through */
  #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
    /* For most CPUs this code is better when not byte reordering. */
    case 1:
      return p[0];
    case 2:
      return fetch16_be_aligned(p);
    case 3:
      return (uint32_t)fetch16_be_aligned(p) << 8 | p[2];
    case 4:
      return fetch32_be_aligned(p);
    case 5:
      return (uint64_t)fetch32_be_aligned(p) << 8 | p[4];
    case 6:
      return (uint64_t)fetch32_be_aligned(p) << 16 | fetch16_be_aligned(p + 4);
    case 7:
      return (uint64_t)fetch32_be_aligned(p) << 24 |
             (uint32_t)fetch16_be_aligned(p + 4) << 8 | p[6];
    case 0:
      return fetch64_be_aligned(p);
  #else
    case 1:
      return p[0];
    case 2:
      return p[1] | (uint32_t)p[0] << 8;
    case 3:
      return p[2] | (uint32_t)p[1] << 8 | (uint32_t)p[0] << 16;
    case 4:
      return p[3] | (uint32_t)p[2] << 8 | (uint32_t)p[1] << 16 |
             (uint32_t)p[0] << 24;
    case 5:
      return p[4] | (uint32_t)p[3] << 8 | (uint32_t)p[2] << 16 |
             (uint32_t)p[1] << 24 | (uint64_t)p[0] << 32;
    case 6:
      return p[5] | (uint32_t)p[4] << 8 | (uint32_t)p[3] << 16 |
             (uint32_t)p[2] << 24 | (uint64_t)p[1] << 32 | (uint64_t)p[0] << 40;
    case 7:
      return p[6] | (uint32_t)p[5] << 8 | (uint32_t)p[4] << 16 |
             (uint32_t)p[3] << 24 | (uint64_t)p[2] << 32 |
             (uint64_t)p[1] << 40 | (uint64_t)p[0] << 48;
    case 0:
      return p[7] | (uint32_t)p[6] << 8 | (uint32_t)p[5] << 16 |
             (uint32_t)p[4] << 24 | (uint64_t)p[3] << 32 |
             (uint64_t)p[2] << 40 | (uint64_t)p[1] << 48 | (uint64_t)p[0] << 56;
  #endif

  }

#endif                                        /* T1HA_USE_FAST_ONESHOT_READ */

}

static __maybe_unused __always_inline uint64_t
tail64_be_unaligned(const void *v, size_t tail) {

  const uint8_t *p = (const uint8_t *)v;
#if defined(can_read_underside) && \
    (UINTPTR_MAX > 0xffffFFFFul || ULONG_MAX > 0xffffFFFFul)
  /* On some systems (e.g. x86_64) we can perform a 'oneshot' read, which
   * is little bit faster. Thanks Marcin Żukowski <marcin.zukowski@gmail.com>
   * for the reminder. */
  const unsigned offset = (8 - tail) & 7;
  const unsigned shift = offset << 3;
  if (likely(can_read_underside(p, 8))) {

    p -= offset;
    return fetch64_be_unaligned(p) & ((~UINT64_C(0)) >> shift);

  }

  return fetch64_be_unaligned(p) >> shift;
#else
  switch (tail & 7) {

    default:
      unreachable();
  /* fall through */
  #if T1HA_SYS_UNALIGNED_ACCESS == T1HA_UNALIGNED_ACCESS__EFFICIENT && \
      __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
    /* For most CPUs this code is better when not needed
     * copying for alignment or byte reordering. */
    case 1:
      return p[0];
    case 2:
      return fetch16_be_unaligned(p);
    case 3:
      return (uint32_t)fetch16_be_unaligned(p) << 8 | p[2];
    case 4:
      return fetch32_be(p);
    case 5:
      return (uint64_t)fetch32_be_unaligned(p) << 8 | p[4];
    case 6:
      return (uint64_t)fetch32_be_unaligned(p) << 16 |
             fetch16_be_unaligned(p + 4);
    case 7:
      return (uint64_t)fetch32_be_unaligned(p) << 24 |
             (uint32_t)fetch16_be_unaligned(p + 4) << 8 | p[6];
    case 0:
      return fetch64_be_unaligned(p);
  #else
    /* For most CPUs this code is better than a
     * copying for alignment and/or byte reordering. */
    case 1:
      return p[0];
    case 2:
      return p[1] | (uint32_t)p[0] << 8;
    case 3:
      return p[2] | (uint32_t)p[1] << 8 | (uint32_t)p[0] << 16;
    case 4:
      return p[3] | (uint32_t)p[2] << 8 | (uint32_t)p[1] << 16 |
             (uint32_t)p[0] << 24;
    case 5:
      return p[4] | (uint32_t)p[3] << 8 | (uint32_t)p[2] << 16 |
             (uint32_t)p[1] << 24 | (uint64_t)p[0] << 32;
    case 6:
      return p[5] | (uint32_t)p[4] << 8 | (uint32_t)p[3] << 16 |
             (uint32_t)p[2] << 24 | (uint64_t)p[1] << 32 | (uint64_t)p[0] << 40;
    case 7:
      return p[6] | (uint32_t)p[5] << 8 | (uint32_t)p[4] << 16 |
             (uint32_t)p[3] << 24 | (uint64_t)p[2] << 32 |
             (uint64_t)p[1] << 40 | (uint64_t)p[0] << 48;
    case 0:
      return p[7] | (uint32_t)p[6] << 8 | (uint32_t)p[5] << 16 |
             (uint32_t)p[4] << 24 | (uint64_t)p[3] << 32 |
             (uint64_t)p[2] << 40 | (uint64_t)p[1] << 48 | (uint64_t)p[0] << 56;
  #endif

  }

#endif                                                /* can_read_underside */

}

/***************************************************************************/

#ifndef rot64
static __maybe_unused __always_inline uint64_t rot64(uint64_t v, unsigned s) {

  return (v >> s) | (v << (64 - s));

}

#endif                                                             /* rot64 */

#ifndef mul_32x32_64
static __maybe_unused __always_inline uint64_t mul_32x32_64(uint32_t a,
                                                            uint32_t b) {

  return a * (uint64_t)b;

}

#endif                                                      /* mul_32x32_64 */

#ifndef add64carry_first
static __maybe_unused __always_inline unsigned add64carry_first(uint64_t base,
                                                                uint64_t addend,
                                                                uint64_t *sum) {

  #if __has_builtin(__builtin_addcll)
  unsigned long long carryout;
  *sum = __builtin_addcll(base, addend, 0, &carryout);
  return (unsigned)carryout;
  #else
  *sum = base + addend;
  return *sum < addend;
  #endif                                 /* __has_builtin(__builtin_addcll) */

}

#endif                                                   /* add64carry_fist */

#ifndef add64carry_next
static __maybe_unused __always_inline unsigned add64carry_next(unsigned  carry,
                                                               uint64_t  base,
                                                               uint64_t  addend,
                                                               uint64_t *sum) {

  #if __has_builtin(__builtin_addcll)
  unsigned long long carryout;
  *sum = __builtin_addcll(base, addend, carry, &carryout);
  return (unsigned)carryout;
  #else
  *sum = base + addend + carry;
  return *sum < addend || (carry && *sum == addend);
  #endif                                 /* __has_builtin(__builtin_addcll) */

}

#endif                                                   /* add64carry_next */

#ifndef add64carry_last
static __maybe_unused __always_inline void add64carry_last(unsigned  carry,
                                                           uint64_t  base,
                                                           uint64_t  addend,
                                                           uint64_t *sum) {

  #if __has_builtin(__builtin_addcll)
  unsigned long long carryout;
  *sum = __builtin_addcll(base, addend, carry, &carryout);
  (void)carryout;
  #else
  *sum = base + addend + carry;
  #endif                                 /* __has_builtin(__builtin_addcll) */

}

#endif                                                   /* add64carry_last */

#ifndef mul_64x64_128
static __maybe_unused __always_inline uint64_t mul_64x64_128(uint64_t  a,
                                                             uint64_t  b,
                                                             uint64_t *h) {

  #if (defined(__SIZEOF_INT128__) ||                                  \
       (defined(_INTEGRAL_MAX_BITS) && _INTEGRAL_MAX_BITS >= 128)) && \
      (!defined(__LCC__) || __LCC__ != 124)
  __uint128_t r = (__uint128_t)a * (__uint128_t)b;
  /* modern GCC could nicely optimize this */
  *h = (uint64_t)(r >> 64);
  return (uint64_t)r;
  #elif defined(mul_64x64_high)
  *h = mul_64x64_high(a, b);
  return a * b;
  #else
  /* performs 64x64 to 128 bit multiplication */
  const uint64_t ll = mul_32x32_64((uint32_t)a, (uint32_t)b);
  const uint64_t lh = mul_32x32_64(a >> 32, (uint32_t)b);
  const uint64_t hl = mul_32x32_64((uint32_t)a, b >> 32);
  const uint64_t hh = mul_32x32_64(a >> 32, b >> 32);

  /* Few simplification are possible here for 32-bit architectures,
   * but thus we would lost compatibility with the original 64-bit
   * version.  Think is very bad idea, because then 32-bit t1ha will
   * still (relatively) very slowly and well yet not compatible. */
  uint64_t l;
  add64carry_last(add64carry_first(ll, lh << 32, &l), hh, lh >> 32, h);
  add64carry_last(add64carry_first(l, hl << 32, &l), *h, hl >> 32, h);
  return l;
  #endif

}

#endif                                                   /* mul_64x64_128() */

#ifndef mul_64x64_high
static __maybe_unused __always_inline uint64_t mul_64x64_high(uint64_t a,
                                                              uint64_t b) {

  uint64_t h;
  mul_64x64_128(a, b, &h);
  return h;

}

#endif                                                    /* mul_64x64_high */

/***************************************************************************/

/* 'magic' primes */
static const uint64_t prime_0 = UINT64_C(0xEC99BF0D8372CAAB);
static const uint64_t prime_1 = UINT64_C(0x82434FE90EDCEF39);
static const uint64_t prime_2 = UINT64_C(0xD4F06DB99D67BE4B);
static const uint64_t prime_3 = UINT64_C(0xBD9CACC22C6E9571);
static const uint64_t prime_4 = UINT64_C(0x9C06FAF4D023E3AB);
static const uint64_t prime_5 = UINT64_C(0xC060724A8424F345);
static const uint64_t prime_6 = UINT64_C(0xCB5AF53AE3AAAC31);

/* xor high and low parts of full 128-bit product */
static __maybe_unused __always_inline uint64_t mux64(uint64_t v,
                                                     uint64_t prime) {

  uint64_t l, h;
  l = mul_64x64_128(v, prime, &h);
  return l ^ h;

}

static __maybe_unused __always_inline uint64_t final64(uint64_t a, uint64_t b) {

  uint64_t x = (a + rot64(b, 41)) * prime_0;
  uint64_t y = (rot64(a, 23) + b) * prime_6;
  return mux64(x ^ y, prime_5);

}

static __maybe_unused __always_inline void mixup64(uint64_t *__restrict a,
                                                   uint64_t *__restrict b,
                                                   uint64_t v, uint64_t prime) {

  uint64_t h;
  *a ^= mul_64x64_128(*b + v, prime, &h);
  *b += h;

}

/***************************************************************************/

typedef union t1ha_uint128 {

#if defined(__SIZEOF_INT128__) || \
    (defined(_INTEGRAL_MAX_BITS) && _INTEGRAL_MAX_BITS >= 128)
  __uint128_t v;
#endif
  struct {

#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
    uint64_t l, h;
#else
    uint64_t h, l;
#endif

  };

} t1ha_uint128_t;

static __maybe_unused __always_inline t1ha_uint128_t
not128(const t1ha_uint128_t v) {

  t1ha_uint128_t r;
#if defined(__SIZEOF_INT128__) || \
    (defined(_INTEGRAL_MAX_BITS) && _INTEGRAL_MAX_BITS >= 128)
  r.v = ~v.v;
#else
  r.l = ~v.l;
  r.h = ~v.h;
#endif
  return r;

}

static __maybe_unused __always_inline t1ha_uint128_t
left128(const t1ha_uint128_t v, unsigned s) {

  t1ha_uint128_t r;
  assert(s < 128);
#if defined(__SIZEOF_INT128__) || \
    (defined(_INTEGRAL_MAX_BITS) && _INTEGRAL_MAX_BITS >= 128)
  r.v = v.v << s;
#else
  r.l = (s < 64) ? v.l << s : 0;
  r.h = (s < 64) ? (v.h << s) | (s ? v.l >> (64 - s) : 0) : v.l << (s - 64);
#endif
  return r;

}

static __maybe_unused __always_inline t1ha_uint128_t
right128(const t1ha_uint128_t v, unsigned s) {

  t1ha_uint128_t r;
  assert(s < 128);
#if defined(__SIZEOF_INT128__) || \
    (defined(_INTEGRAL_MAX_BITS) && _INTEGRAL_MAX_BITS >= 128)
  r.v = v.v >> s;
#else
  r.l = (s < 64) ? (s ? v.h << (64 - s) : 0) | (v.l >> s) : v.h >> (s - 64);
  r.h = (s < 64) ? v.h >> s : 0;
#endif
  return r;

}

static __maybe_unused __always_inline t1ha_uint128_t or128(t1ha_uint128_t x,
                                                           t1ha_uint128_t y) {

  t1ha_uint128_t r;
#if defined(__SIZEOF_INT128__) || \
    (defined(_INTEGRAL_MAX_BITS) && _INTEGRAL_MAX_BITS >= 128)
  r.v = x.v | y.v;
#else
  r.l = x.l | y.l;
  r.h = x.h | y.h;
#endif
  return r;

}

static __maybe_unused __always_inline t1ha_uint128_t xor128(t1ha_uint128_t x,
                                                            t1ha_uint128_t y) {

  t1ha_uint128_t r;
#if defined(__SIZEOF_INT128__) || \
    (defined(_INTEGRAL_MAX_BITS) && _INTEGRAL_MAX_BITS >= 128)
  r.v = x.v ^ y.v;
#else
  r.l = x.l ^ y.l;
  r.h = x.h ^ y.h;
#endif
  return r;

}

static __maybe_unused __always_inline t1ha_uint128_t rot128(t1ha_uint128_t v,
                                                            unsigned       s) {

  s &= 127;
#if defined(__SIZEOF_INT128__) || \
    (defined(_INTEGRAL_MAX_BITS) && _INTEGRAL_MAX_BITS >= 128)
  v.v = (v.v << (128 - s)) | (v.v >> s);
  return v;
#else
  return s ? or128(left128(v, 128 - s), right128(v, s)) : v;
#endif

}

static __maybe_unused __always_inline t1ha_uint128_t add128(t1ha_uint128_t x,
                                                            t1ha_uint128_t y) {

  t1ha_uint128_t r;
#if defined(__SIZEOF_INT128__) || \
    (defined(_INTEGRAL_MAX_BITS) && _INTEGRAL_MAX_BITS >= 128)
  r.v = x.v + y.v;
#else
  add64carry_last(add64carry_first(x.l, y.l, &r.l), x.h, y.h, &r.h);
#endif
  return r;

}

static __maybe_unused __always_inline t1ha_uint128_t mul128(t1ha_uint128_t x,
                                                            t1ha_uint128_t y) {

  t1ha_uint128_t r;
#if defined(__SIZEOF_INT128__) || \
    (defined(_INTEGRAL_MAX_BITS) && _INTEGRAL_MAX_BITS >= 128)
  r.v = x.v * y.v;
#else
  r.l = mul_64x64_128(x.l, y.l, &r.h);
  r.h += x.l * y.h + y.l * x.h;
#endif
  return r;

}

/***************************************************************************/

#if T1HA0_AESNI_AVAILABLE && defined(__ia32__)
uint64_t t1ha_ia32cpu_features(void);

static __maybe_unused __always_inline bool t1ha_ia32_AESNI_avail(
    uint64_t ia32cpu_features) {

  /* check for AES-NI */
  return (ia32cpu_features & UINT32_C(0x02000000)) != 0;

}

static __maybe_unused __always_inline bool t1ha_ia32_AVX_avail(
    uint64_t ia32cpu_features) {

  /* check for any AVX */
  return (ia32cpu_features & UINT32_C(0x1A000000)) == UINT32_C(0x1A000000);

}

static __maybe_unused __always_inline bool t1ha_ia32_AVX2_avail(
    uint64_t ia32cpu_features) {

  /* check for 'Advanced Vector Extensions 2' */
  return ((ia32cpu_features >> 32) & 32) != 0;

}

#endif                                 /* T1HA0_AESNI_AVAILABLE && __ia32__ */